CJJ/T 68-1996 Technical Specification for Maintenance of Urban Drainage Pipes and Pumping Stations CJJ/T68-96 CJJ/T68-1996 Standard download decompression password: www.bzxz.net

Industry Standard of the People's Republic of China
Maintenance of Sewerage Pipelines & Channels and Pumping Station in City and Town
Technical Specification for Maintenance of Sewerage Pipelines & Channels and Pumping Station in City and Town CJJ/T 68—96
Editing unit: Shanghai Urban Drainage Management OfficeApproving department: Ministry of Construction of the People's Republic of ChinaEffective date: April 1, 1997
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Notice on the release of the industry standard
"Technical Code for Maintenance of Urban Drainage Pipes and Pumping Stations"Construction Standard [1996] No. 541
Construction Committees (Construction Departments) of all provinces, autonomous regions, and municipalities directly under the Central Government, Construction Committees of independently planned cities, and relevant departments of the State Council:
In accordance with the requirements of the Ministry of Construction's Document No. Jianbiao [1992] 227, the "Technical Code for Maintenance of Urban Drainage Pipes and Pumping Stations" edited by the Shanghai Urban Drainage Management Office has been reviewed and is now approved as an industry standard, numbered CJJ/T68—96, and will be implemented on April 1, 1997. This standard is managed by the Ministry of Construction's Urban Construction Standards and Technology Management Unit, the Ministry of Construction's Urban Construction Research Institute, and its specific interpretation is the responsibility of the Shanghai Municipal Urban Drainage Management Office.
This standard is published by the Ministry of Construction's Standards and Norms Research Institute. Ministry of Construction of the People's Republic of China
September 27, 1996
Drainage pipelines
3.1 Pipeline maintenance.…
Pipeline repair··
3.3 Sludge transportation…
Drainage pump station
General provisions·
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Drainage pump
Electrical equipment·
Water inlet and outlet facilities,
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Related facilities
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Automatic control and computer control….-23-·Technical data on maintenance of drainage facilities
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Appendix A Explanation of terms used in this regulation
Additional instructions
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This regulation is formulated to strengthen the maintenance of urban drainage facilities, unify technical standards, ensure the safe operation of facilities and give full play to the functions of facilities. 1.0.2 This regulation applies to the maintenance of urban municipal drainage pipelines and pumping stations. 1.0.3 The maintenance of urban municipal drainage pipelines and pumping stations shall, in addition to complying with this regulation, also comply with the provisions of the relevant national standards currently in force. 2.0.1 Catch basin
Facility on the roadside for collecting rainwater on the ground. 2.0.2 Grating
A grating installed on the top of the catch basin. It can intercept garbage and prevent it from falling while allowing rainwater to pass through. 2.0.3 Connecting pipe
Buried on both sides of the road, connecting the municipal pipeline with the water outlet or the user. 2.0.4 Setvice connection Connecting pipe connecting the municipal pipeline with the user. 2.0.5 Manhole
A structure on the drainage pipeline that connects other pipelines and allows maintenance workers to inspect, clear and enter the pipeline. 2.0.6 Service manhole
The last inspection well where the user's drainage pipe leads to the municipal pipeline. The well and the upstream pipeline are for user exclusive use, and the pipeline below the well is owned by the city. 2.0.7
Basin sump
The trough-shaped part below the water inlet and the inspection well is used for the accumulation of mud in the pipeline.
2.0.8Outlet
Outlet
The screen for discharging water, treated sewage or combined sewage into the water body after being transported through the pipeline.
Bucket
Ditch shovel
A shovel-shaped, bucket-shaped, round brush-shaped, etc. mud shovel that removes mud from the pipeline under the traction of the unwinding rope.
2.0.10 Winch bucket cleanWinch bucket clean is used to remove mud from the pipeline by winch rate. 2. 0. 11Rod turning clean
Rod turning clean
Use a manual motor to drive the drill installed on the head of the flexible shaft turning rod to remove the mud in the pipe.
2. 0. 12 Rod rigid cleanUse a short extension and a drill or target installed in the front to remove the mud in the pipe. 2.0. 13 Hydraulic cleanBy increasing the water level difference between the upstream and downstream of the pipe, a high flow rate is formed to clear the mud in the pipe.
2. 0. 14 Jet clean
Use a high-pressure jet of water to clear the mud in the pipe. 2. 0. 15 Dye test
A method of inspection to show the direction of the pipeline by observing the dye in the water and find out the problems in the operation of the pipeline.
Hydraulic measurement2.0.16
Through the measurement and analysis of the flow velocity, flow rate and hydraulic gradient line of the pipeline, find out the inspection method of the problems in the operation of the pipeline nest.2. 0.17 Tide gate
A one-way opening and closing valve installed at the outlet of the drainage pipeline or the outlet pipe section of the water pump leading to the water body, which can be used to prevent water backflow.5—23— 4
2. 0, 18 Run doum tirneThe inertial travel time of a rotating machine after losing the driving force to a standstill.2. 0.19
Hand operated rotaion
The process of rotating a rotating machine to rotate the rotor at a low speed by manpower or with the help of special tools without driving force.
3 Drainage pipelines
3.1 Pipeline maintenance
Drainage facility management units should conduct regular sampling and testing of the discharge water quality of users who discharge sewage in accordance with the requirements of the current industry standard "Water Quality Standard for Sewage Discharge into Urban Sewers" (CJ18), and establish management files. 3.1.2 In the diversion system area, it is strictly prohibited to mix rainwater and sewage. Pipeline inspection can be carried out by ground inspection, down-well inspection, diving inspection, dyeing inspection, hydraulic testing and other methods.
. The inspection requirements for various pipe nests and ancillary structures should comply with the provisions of Table 3.1.3.
Inspection requirements for pipelines and ancillary structures
Type of equipment Inspection method
Inspection cycle
(Time/time>
Water-resistant inlet and surface inspection Illegal occupation, compliance with regulations, salt and seat, shade water calculation, ladder inspection well
Breakthrough, and scale, and should be infected, and body structure, etc. Inspection of cultivation occupation, cultivation surface, water level and flow, accumulation, etc.
Inlet pipe inspection deformation, erosion, maintenance, interface, tree root, scaling, etc. Inspection of testicular occupation, tracing and taking over, edge fixing, nest edge planting, water level and water speed, batch weaving, whole board defects, increase body control, etc. Inspection signs spleen, network clear water level difference, inspection well, Gates and other inspections Siphon pipes
Drainage outlets
Network gates
Diving inspections for acid weaving, corrosion, interface seepage, bed erosion, pipe top soiling, etc. Overpressure control inspections for urine, standard signs, soil increase, resistance accumulation, micro-blocking during joint erosion, erosion, floor openings, riverbed erosion, body dynamic balance growth conditions Diving inspections
Increase the prevention and control of the network gates and sugar, mechanism separation, defects, opening and closing, disorderly sealing, heavy discharge stability inspections, and network inspections, machine type inspections, corrosion, defects, body closure, and dangerous sealing. 3.1.4 The safety requirements for pipeline maintenance and inspection shall comply with the provisions of the current industry standard "Safety Technical Regulations for Drainage Pipeline Maintenance" (CJJ6). 3.1. 5
The maximum mud accumulation depth of pipelines, water outlets and inspection wells shall comply with Table 3.1.5.
Pipeline, water outlet and inspection and maintenance of large mud accumulation spiral degree maximum mud accumulation depth
Water pipe or combined micro pipe
Below 600mm
Above 600mzm
Any pipe diameter
With sinking cycle
No sinking
With visual sugar
No sinking regulation
1/4 of pipe diameter
3/5 of pipe diameter
1/5 of sales diameter
Below 50mm of pipe storage
Above 50mm of bone rate
Below 50mm
With pipeline mud accumulation depth
3.1.6 The maintenance of water-resistant outlets and inspection and maintenance shall comply with the following provisions: Cover 3.1.5
3.1. 6.1 The main contents of water inlet inspection and maintenance should include: clearing mud, washing well wall, matching or replacing, and installing seats and steps. 3. 1. 6. 2 The quality of cast iron used should comply with the provisions of the current industry standard (cast iron inspection and installation) (CI/T3012). 3. 1.7 Pipeline maintenance should comply with the following provisions: 3. 1. 7. 1
When using a rotary rod to dredge or a trench to dredge, the motor or drill should be checked first. When using a winch to dredge, a rotary pulley should be used at the corner of the well and the pipe mouth. The steel pipe should not be directly connected to the wellhead and the pipe mouth. 3. 1. 7. 3 When using a winch bowl to dredge, the diameter of the last trench to pass should be one level smaller than the pipe diameter.
3. 1.7. #
When the water volume of hydraulic dredging is insufficient, it is advisable to use a valve or pipe to block the accumulated water, and then flush it with water after raising the water level. : When hydraulic flushing cannot completely remove the accumulated mud in the channel, it is advisable to use 3.1.7.5
hydraulic dredging float or water jet dredging. 3.1.8 The maintenance of the siphon shall comply with the following provisions 3.1.8. In areas where the riverbed is eroded, the soil restoration of the cross-river siphon shall be checked once a year; if the soil restoration fails to meet the design requirements, reinforcement measures shall be taken. 3.1.8.) When the double-channel siphon is used, one of the inlets can be closed and the water can be used to control the flow. When the straight section of the siphon with a diameter less than or equal to 1000mm encounters another
, it can also be dredged by winch
3.1.8..3 The siphon protection signboards set on the navigable river should be regularly painted and maintained to keep them clear and intact.
3.1.8.1 For the inverted siphon across the river, anti-floating test shall be carried out before the pipeline is emptied for maintenance.
3.1.9 The maintenance of the siphon shall comply with the following provisions: 3.1.9.1 The open channel shall be regularly repaired and sludge shall be removed. 3.1.9.2 The cross-sectional conditions of the straight sections, turning points and slope change points of the open channel without pins shall be regularly checked. If damage is found, the standard trench cross-section shall be reconstructed with masonry to control the trench bottom elevation and cross-sectional dimensions, and shall comply with the original design requirements. 3.1.9.3 The cover plate of the channel shall be kept free of defects, fractures and ribs, and shall be placed stably and with tight seams. The height difference between adjacent drain plates shall not be greater than 10mm. 3.1.10 The maintenance of the drain outlet shall comply with the following provisions: 3.1.10.1 Regular inspections shall be carried out to promptly stop the dumping of garbage into the drain outlet and the accumulation of objects near it.
3. 1. 10. 2 The outlet signboard should be painted regularly to keep it clear and intact. The outlets where the water flow is blocked due to riverbed siltation should be flooded regularly to keep the water flow smooth. The retaining wall or slope protection of the bank-side outlet should be kept in good structural condition. When there is damage such as tilting, sinking, cracks, etc., it should be repaired in time. 3. 1. 10. 5
The river-center outlet should be inspected to prevent damage caused by fishing operations, navigation or other engineering operations.
3. 1. 10. 6
River-center discharge outlets should be hydraulically flushed regularly to keep the discharge pipes and jets unobstructed.
River-center discharge outlets should be inspected by diving to check changes in the riverbed or seabed, pipeline erosion, component erosion, and underwater biological attachment and growth. Pipeline antifreeze should comply with the following provisions.
3. 1. 11. 1 Before freezing, antifreeze measures such as hemp, sawdust, and blockage should be adopted at the south water outlet.
3.1. 11. 2 During the freezing period, pipelines that have become denser due to freezing should be thawed by steam thawing.
After thawing, the insulating materials used to cover the water inlet should be removed in time, and the sand that flows into the pipe with the thaw should be removed.
3. 2 Pipeline repair
When it is necessary to cut off the water supply for repair work and block the existing drainage pipeline, temporary drainage measures should be taken.
After the project is completed, all the blockages, bricks and other debris left in the pipeline should be cleaned up in time.
The quality of pipeline reconstruction and maintenance projects should comply with the provisions of the current industry standard "Municipal Drainage Pipeline Project Quality Inspection and Assessment Standard" (CJJ3). 3.2.3 Repair of pipeline cracks shall comply with the following provisions: Fine cracks and mesh cracks can be replaced by pressing or spraying the old surface layer, or by adding a new surface layer. Before adding the surface layer, the original wall surface should be cleaned. 3.2.3.2 Before filling, the key or pipe interface should be made into a V-shaped groove with a depth of not less than 30mm and a deadness of not less than 15mm; after cleaning, it should be filled with cement mortar or other quick-setting materials or asbestos gland expansion cement with a thickness of 15mm; after checking that there are no cysts, the remaining 15mm should be filled with impermeable cement mortar. The admixtures used in impermeable cement mortar should include one of waterproofing agent, water reducing agent and expansion agent. 3.2.3.3 When there is severe stagnation, grouting should be used for blocking. When grouting is used to plug leaks, the hole should be drilled to the depth of the crack or to the outer wall of the pipe, and then the grout should be injected into the hole.
3.2.3.4 The inner sleeve method can be used to repair the duct interface with a diameter of more than 1000mm. The sleeve can be prefabricated with steel plates or plastics; there should be a rubber seal between the sleeve and the concrete pipe, and the seal should not have joints. Anti-corrosion measures should be taken for the steel sleeve. 3.2.4 The repair of corrosive damage should comply with the following provisions: 3.2.4.1 Before adding a mask or updating the anti-corrosion surface layer, the original concrete surface should be cleaned.
It is advisable to use the method of spreading or spraying to add the anti-corrosion mortar layer, and its thickness should not be less than 20mm.
3.2.4.2 The anti-corrosion coating should be applied by scraping or brushing, and its thickness should not be less than 0.3mm. When maintaining sewage pipes that are seriously corroded by hydrogen sulfide, ventilation, anti-poisoning and other safety measures should be taken, and the provisions of the current industry standard "Safety Technical Regulations for Drainage Pipeline Maintenance" (CJJ6) should be met. 3.2.5 The performance of the settlement waterstop should meet the following requirements. 3.2.5.1 The specifications, dimensions, elongation, rebound rate, aging coefficient and other physical and chemical performance indicators of the replaced waterstop should meet the design requirements. The buried position of the waterstop should be accurate, and the hollow circle in the middle of the waterstop should be located in the middle of the deformation joint.
The strength of the newly poured concrete should not be lower than the strength of the original concrete. The joints between the new and old concrete and between the concrete and the ice stop strip should be dense and firm. 3.2.5.4
The joints of the waterstop should not be left at the corners, and the curvature radius of the waterstop at the corners should be greater than 200mm.
Additional wells on old pipes shall comply with the following provisions:
3.2.6.1 The load of the addition shall not be borne entirely by the old pipe. For small pipes with a diameter of less than 600mm, the well should be dug to the bottom of the pipe when adding wells! For pipes with a diameter of more than 600mm, the well can be dug to half of the pipe when adding wells. The bottom of the addition shall be built with a foundation. 3.2.6.2 When adding wells on the old pipe, the pipes other than the holes shall not be damaged. The periphery of the dense holes shall be aligned with the wall of the pipe and smoothed with cement sand. The brick wall close to the upper half of the pipe shall be arched.
3. 2.7 The connection pipes shall meet the following requirements: 3. 2. 7. 1
All types of connection pipes shall be connected before inspection, and no blind holes shall be drilled on the storage channel. After the connection pipes are connected, the gap between the connection pipe and the wall hole shall be filled with cement sand 3. 2.7. 2
and smoothed inside and outside. The angle between the connection pipe and the upper storage channel shall be less than 90°3. 2. 7. 4 Before the two water connection pipes are connected to the pipeline, a sunken test pipe shall be added. 3.2.8
The lifting and lowering of the connection pipes shall meet the following requirements
3.2.8.1 The connection between the shaft and the body should be flat and firm, and should not be loose. The height difference between the top surface and the road surface should comply with the provisions of the current industry standard "Technical Specifications for Urban Road Maintenance" (CJ36).
3.2.8.2 The lining material between the frame and the body should be concrete under the motor vehicle lane, and its density should not be less than C20; under the roadway, brick masonry can be used, and the lime-sand ratio of its masonry mortar should not be less than 1:1:2. 3.2.8.3
When the frame is raised or lowered, the concrete should be early-strength cement glass and early-strength agent should be added to the ordinary cement. Guardrails should be used for enclosure during concrete curing. 3.2.9 Drainage repairs shall comply with the following provisions: 3.2.9.1 Before repairing landslides, scouring, seawater and wetting of earth canals, the damaged parts shall be pre-treated by removing loose soil and thinning the damaged parts, and the damaged parts shall be turned into stable slopes. Holes shall be enlarged and cleaned; cracks shall be enlarged and cleaned. When restoring the original state of the soil canals, the soil shall be compacted layer by layer, and the thickness of the layer shall not be greater than 300mm. The cross-sectional shape after repair shall be consistent with the original design and shall not be reduced.
3.2.9.3 The earthen canal with severe oxygen adjustment shall be repaired by one of the following engineering measures: (1) Build a 300~500mm thick cement wall on the water-facing surface; (2) Build a concrete or mortar block stone protective surface; (3) Use pressure grouting.
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3.2.9.4 The cracks, leakage or corrosive damage of mortar masonry shall comply with the relevant provisions of Articles 3.2.3 and 3.2.4 of this Code. 3.2.9.5 When the structures such as earth retaining wall, mortar stone channel, overflow weir and force dissipation sill are seriously damaged, they shall be demolished and rebuilt; the newly built structures shall be subjected to hydraulic and structural calculations.
3.3 Sludge Transportation
The transportation of ditch sludge shall comply with the following provisions: When mechanical suction filtration or mixing is used, the sludge should be directly transported by truck. 3.3.11
: When manual excavation is used, it is advisable to use a dump truck sludge trailer or sludge container for loading; when water transportation conditions permit, water-land combined transportation can also be used. During the process of dredging or sludge filtration and transportation, the sludge should not fall to the ground and should not be spilled along the way. The sludge container and transportation vehicle should be cleaned regularly and kept clean, and should be covered. After the dredging operation is completed, the sludge container should be promptly dispersed from the site and should not be left on the street for more than one night. When sludge containers and vehicles stop working overnight on the street, safety red lights should be hung.
Drainage pump station
4.1 General provisions
4.1.1 After the water pump is repaired, its flow rate should not be less than 90% of the design flow rate; its unit efficiency should not be less than 90% of the original unit efficiency. The integrity rate of the pump station unit should reach more than 90%; the operability rate of the pump station unit during the flood season should reach more than 98%. 4.1.2 The electromechanical equipment and pipe fittings in the drainage pump station should be derusted and oiled every two years.
4.1.3 The water level meter, rain gauge, and start-up time meter in the drainage pump station should be tested once a year; when the instrument fails, it should be replaced immediately. Anti-toxic equipment must be calibrated before use and can only be used after passing the test.
4. 1. 4 The enclosures, roads, gathering rooms and ancillary facilities of the drainage pump station should be regularly cleaned and maintained. If damaged, they should be repaired immediately and renewed every three years.
During the flood season every year, the flood control facilities of the drainage pump station should be inspected and maintained. 4. 1. 5
The drainage pump station should regularly carry out sanitation, greening and pest control. 4. 1. 6
The drainage pump station should have complete operation and maintenance records. 4.2 The operation of the drainage pump should comply with the following provisions:
4. 2. 1 1 Routine inspection before water pump operation: (1) When turning the gear, the water system and the motor must not have silicon embedded and light hook phenomenon; (2) The axial spacing and coaxiality of the elastic cylindrical pin coupling must meet the requirements; (3) The bearings of each part of the water pump should be in a positive belt lubrication state; (4) The sealing performance of the water system shaft seal mechanism should be good; (5) Before the operation of centrifugal pumps and horizontal mixed flow pumps, the air in the pump body should be exhausted; (6) Before the operation of axial flow pumps and vertical mixed flow slurry pumps, the cooling water system and lubricating water system should be checked. System and vacuum pumping system:
(7) The screw pump can only be started when the first impeller is immersed in water for more than 50%; 4.2.1.2 Inspection during water pump operation: (1) The direction of the water pump unit should be correct, the operation should be smooth, and there should be no abnormal disturbance or abnormal sound.
(2) The water pump unit should operate within the specified voltage, current, speed and pressure range;
(3) The bearing temperature of the water pump should be normal, the sliding bearing should not exceed 65℃, the hydraulic bearing should not exceed 70℃, and the temperature rise should not be greater than 35℃. (4) The water supply pressure of the rubber bearing should be normal;
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(5) The seal of the shaft seal mechanism should not be too thin and should not generate heat;(6) The pump body connection pipe and the engine base should be solid and should not leak water;(7) The submersible pump should maintain the submerged depth during operation (8) During operation, the "six diligence" working method of frequent sliding, frequent listening, frequent touching, frequent smelling, frequent fishing and frequent hands should be implemented.
4. 2. 1. 3 Inspection when the water pump stops running: (1) The shaft seal mechanism should not be splashed with water;
(2) The sound when the check valve or the water outlet valve is closed should be normal;(3) The running time and stop condition of the pump shaft should be observed (4) The water pump unit should be kept in good condition.
Daily maintenance of water pumps shall comply with the following provisions:4. 2. 2
4. 2. 2. 1
4.2. 2. 2
4. 2. 2. 3
4. 2. 2. 4
All kinds of bearings shall be regularly filled with the specified lubricating oil or grease, and the coupling shall be checked.
The packing of the shaft seal mechanism shall be regularly checked and replaced, and the accumulated water and dirt shall be removed. The tightness of the bolts of the pump body shall be checked. Water pumps that are not often used shall be rotated once a week with tools, and the trial operation time shall not be less than 15 minutes.
The water pump unit shall be free of dust, grease and rust. 4.2.2.6
When the centrifugal pump is out of use, the accumulated water in the water pump, temporary channel, valve, etc.4. 2. 2.7
should be drained.
The hand hole of the centrifugal pump should be opened frequently and the garbage in the pump should be removed in time. 4. 2. 2. 8
However, it is strictly forbidden to do this work when the centrifugal pump is running. The cooling water system, water skiing system and vacuum system of axial flow pumps and vertical irrigation pumps4. 2. 2. 9
should be checked regularly. bZxz.net
4. 2. 2. 10 The oil quality and oil quantity in the gear reducer oil tank should be checked regularly. If the oil quality does not meet the requirements, the oil should be changed immediately. If the oil quantity is insufficient, oil should be added in time. When the impeller system is out of use for a long time, the impeller should be rotated once a week and changed position4. 2. 2. 11
should be changed position.
4.2.3 The regular maintenance of water pumps shall comply with the following provisions: 4.2.3.1
Regular maintenance of water systems
(1) Axial flow pumps shall run for a total of 3000 hours, high-pressure systems shall run for a total of 4000 hours; mixed flow pumps and submersible systems shall run for a total of 5000 hours. Pumps that are not frequently operated shall be dismantled and repaired every 3 years1
(2) Before regular maintenance of water pumps, a maintenance technical plan and safety measures shall be formulated; (3) The technical performance of the water system after maintenance shall comply with the provisions of Article 4.1.1 of this Regulation; (4) Regular maintenance of water pumps shall have complete maintenance records and acceptance materials. 4.2.3.2 Regular maintenance of high-pressure pumps shall also comply with the following provisions: (1) Check the shaft seal mechanism. If it is damaged, it should be repaired or replaced; (2) When the gap between the impeller and the sealing ring exceeds the specified value, it should be repaired or replaced! (3) If there are cracks, defects or holes on the impeller blades and guide plate, they should be replaced in time:
【4）When the width, depth and thickness of the impeller channel and guide wheel erosion are greater than 2mm, they should be repaired in time. When the remaining thickness is less than 2/3 of the original thickness, they should be replaced in time. (5) When the bearing wear clearance exceeds the specified value, it should be replaced; (6) If the centrifugal accumulator adopts "variable diameter adjustment", calculation should be carried out. 4.2.3.3 The regular maintenance of axial flow system and mixed flow system shall also comply with the following provisions:(1) Check the shaft seal mechanism. If it is damaged, it should be repaired or replaced. (2) Check the wear degree of the pump shaft, moving pair and bearing. If it is damaged, it should be repaired or replaced!
(3) Check the amount of wear on the outer edge of the blade. If it exceeds the specified value, it should be repaired or replaced;
(4) If the spherical wear of the guide vane bell tube is greater than 5mm, it should be repaired or replaced;
(5) The coaxiality of the unit should be calibrated.
4.2.3.4 The regular maintenance of the submersible system should also comply with the following provisions: (1) Check the amount of bearing wear. If it exceeds the specified value, it should be replaced; (2) The gap between the impeller and the pump housing of the submersible pump is too large. Blade breakage, pump body and pump cover damage, cracks and damage should be repaired or replaced; (3) Check the seal and insulation of the pump.
4.2.3.5 The regular maintenance of the screw pump shall also comply with the following provisions: (1) Check the wear degree of the upper and lower bearings. If wear is found, they should be replaced; (2) Check the elastic pin of the coupling. If wear is found, they should be replaced; (3) The gear reducer should be disassembled for inspection:
(4) Check the blades. If deformation is found, they should be repaired or replaced. 4.3 Electrical equipment
The inspection and maintenance of electrical equipment shall comply with the following provisions: 4.3.1
The regular cleaning, inspection and inspection of electrical equipment during operation shall comply with the following provisions:
(1) Electrical equipment should be cleaned and inspected regularly, not less than twice a year; (2) During the operation of electrical equipment, it should be inspected once per shift, and the night inspection with lights off should not be less than once a week.
4.3.1.2 In addition to regular maintenance, electrical equipment should also be inspected in a timely manner based on test and inspection results.
The test of electrical equipment shall comply with the following provisions: 4.3.1.3
(1) High-voltage electrical equipment shall be subject to preventive tests on schedule. The preventive test items, cycles and requirements shall comply with the provisions of the current industry standard "Electrical Equipment Preventive Test Procedure":
(2) The test items and requirements of high- and low-voltage electrical equipment after regular maintenance shall comply with the provisions of the current industry standard "Electrical Equipment Preventive Test Procedure". (3) After the high- and low-voltage electrical equipment is remodeled and before it is put into operation, a handover test must be carried out. The items and requirements of the handover test shall comply with the provisions of the current national standard "Electrical Equipment Handover Test Standard for Electrical Installation Engineering" (GB50150). 4.3.2 The regular inspection of power cables shall comply with the following provisions: 4.3.2.1
4. 3. 2. 4
Condition.
The cable terminal shall be clean and free of lubricating oil or oil leakage. The continuity of the cable must meet the operation requirements. There should be no water accumulation or seepage in the cable trench.
There should be no piles, trees or other things that may damage the cables along the cable line. Lightning arresters and lightning rods should be inspected at least once a year and must be inspected before the lightning season.
4. 3. 4 The inspection and maintenance of transformers should comply with the following provisions: After the transformer is put into operation, it should be maintained at least once every ten years under normal conditions.
When any of the following faults occur in the transformer, the power should be shut down for inspection and maintenance immediately: 4. 3. 4. 2
(1) The safety airway membrane is damaged or the oil storage tank is filled with oil; (2) The heavy gas breaker is activated;
(3) The porcelain bushing is seriously discharged and damaged; (4) The noise inside the transformer increases and is uneven, with cracking sounds; (1) Under normal cooling conditions, the oil temperature is abnormal or continues to rise; (6) Severe oil condensation is found, and there is no oil in the oil storage tank; (\》During the preventive test, the transformer does not meet the standards; (8) The transformer oil is seriously discolored.
4. 3. 5 The inspection and maintenance of high-voltage switches shall comply with the following regulations: The inspection of high-voltage disconnectors and high-voltage load switches shall not be less than once a year. 4.3. 5.1
Maintenance cycle of high-voltage oil switches:
4. 3. 5. 2
(1) The high-voltage oil switch that controls the start of the motor should be regularly maintained once a year; the high-voltage oil switch that is frequently started should be maintained at least twice a year; (2) The high-voltage oil switch that controls the power distribution should be regularly maintained once a year; (3) After cutting off the short-circuit filter twice, the high-voltage sleeve is immediately closed. 4.3.5.3 The inspection of the high-voltage oil switch after maintenance should include the following items; (1) Determine the total stroke, overstroke and rotation angle of the conductive rod (2) Detect the buffer hip
(3) Determine the timing of the three-phase closing;
(4) The electrical test items specified in the "Electrical Equipment Preventive Test Regulations": 4.3.6 The inspection and maintenance of low-voltage switches shall comply with the following provisions 4.3. 6.1 The regular maintenance of low-voltage switches should be carried out not less than once a year; the switches that control motors should be cleaned and inspected internally every month. 4.3.6.2
After the regular maintenance of low-voltage switches, the insulation resistance and contact resistance of the switches should be measured.
The motor starting equipment must be inspected and maintained regularly, and the contents should include dynamic and static 4.3.7
contacts, arc extinguishing components, electromagnetic strong iron circuits and control room wiring, etc. After maintenance, the three-phase synchronism should be checked, the insulator resistance should be measured, and the contact pressure should be measured. The inspection of current, voltage transformers and capacitors should comply with the following provisions: 4.3.8
4. 3. 8. 1 The regular inspection of current and voltage transformers should be carried out at least once a year. Inspection of reactive power compensation capacitors during operation 4.3.8.2
(1) The reading of the three-phase ammeter should be observed;
(2) The appearance of the capacitor should be inspected at least twice a week: when the liquid is swollen in the box, the capacitor should be shut down.
4.3.9 The inspection of DC equipment should comply with the following provisions: 4.3.9.1 Inspection of silicon rectifier equipment!
(1) The instrument needle indication and the action of the maintenance device should be positive: (2) The insulator resistance of the AC and DC circuits should not be less than 1Mn/kV; in relatively humid places, it should not be less than 0.5Mn/kV;
(3) Resistors, capacitors, silicon rectifiers and other components should be well connected and there should be no ineffective current, ring damage, overheating and other phenomena.
(4) Silicon rectifier equipment should be clean and free of dust and dirt. Regular inspection of battery DC equipment: (1) The automatic switching device between the working power supply and the backup power supply must be kept in good condition; (2) The voltage and charging current of the working power supply and the backup power supply should be positive; (3) The automatic switching device of the battery group must be kept in good condition. The inspection of relay protection devices and automatic switching devices should be carried out no less than once a year. The inspection of other electrical equipment such as busbars, indicating meters, watt-hour meters, etc. should be carried out simultaneously with the inspection of switchgear in 4.3.11.
The inspection and maintenance of general motors shall comply with the following provisions: 4.3.12
Inspection before starting the motor:
(1) The resistance of the motor winding to the continuous wave meets the requirements for safe operation; (2) There should be no foreign matter inside the open motor; (3) The slip ring and brush of the wound motor should be in good contact, and the pressure of the brush should be positive.
(4) The joints of the motor lead wires should be tight; (5) The bearing lubricant (grease) should meet the lubrication requirements; (6) The grounding device must be reliable;
(7) The power supply of the motor dehumidifier should be disconnected. 4.3.12.2 Inspection during motor operation: (1) The motor should be kept clean and no water droplets or oil should enter the motor; (2) The operating current and voltage should not exceed the rated value; (3) The bearing heating and oil stagnation should be checked; (4) The motor temperature rise should not exceed the allowable value; (5) The motor should not make noise during operation; (6) For wound-rotor motors, the contact wear between the coil and the slip ring should be checked; (7) The motor should be well ventilated; (8) The motor should be in the correct direction; (9) The short-circuit contactor of the weaving-rotor motor should be in the short-circuit position. The motor should be maintained once it has been running for 6000~8000h. The motor that is not in normal operation should be maintained once every four years. 4
Maintenance of the motor:
(1) The dust inside the motor should be cleaned and the insulation of the skid assembly should be in good condition; (2) The core silicon steel sheets should be neat and not loose; (3) The slot molds of the stator and rotor assemblies should not be loose. The lead wires of the standard motor should be well connected, and the phase and mark should be correct and clear; (4) The rotor terminal ring of the squirrel cage motor should not be loose; (5) The binding wire of the rotor wire of the wound-rotor motor should be firm and complete; (6) The heat dissipation and tightening conditions should be good: 5-23-7
(7) Clean the bearings, replace them if they are seriously worn, and check the distance between the stator and the rotor
(8) The motor housing should be intact;
(9) The motor should be tested after maintenance,
4. 4 Water inlet and outlet facilities
4.4. 1 The maintenance of the gate should comply with the following provisions; 4. 4. 1.1 Daily maintenance of gate valves:
(1) The gate valves should be cleaned of dirt and grease, and lubricating grease (oil) should be added to keep them flexible.
(2) The markings of the gate valves such as full open, full closed, direction, and number of revolutions should be clear and complete. (3) For stem-type gate valves, the packing looseness should be adjusted in time. (4) For electric gate valves, the transmission parts and gearbox of the machine should be checked regularly. (5) When the gate valve is opened and closed, if there is any jamming or jumping, the operation should be stopped and checked.
(6) The parts of the gate valves should be kept intact, and any defects should be repaired in time. (7) The gate valves that are not often opened should be opened and closed once every day and kept flexible. 4.4.1.2 Regular maintenance of valves:
(1) Check the tightness of the gate valve and the verticality of the valve stem, adjust the displacement margin of the gate plate, and repair or replace it;
(2) Replace the packing of the gate valve, check the erosion and wear of the valve stem and other parts, and repair or replace them:
(3) The limit switch and interlocking device of the electric gate valve should be reliable. When the limit switch is displaced, fails or the interlocking device fails, it should be adjusted and repaired in time. The maintenance of the grit chamber should comply with the following regulations:4.4.2
The grit chamber should be sand-slided once every six months; when the height of the sand accumulation at the bottom of the pool reaches the bottom of the water inlet pipe4.4.2.1
, the sand should be cleared in time.
When the concrete protective layer of the grit chamber wall is severely peeled, cracked or corroded, it should be repaired according to the design requirements.
4. 4. 2.3
The dredged sand can be mixed with the sewage from the ditch and treated. 4. 4. 3 The maintenance of the grating and the sludge remover shall comply with the following provisions: 4. 4. 3. 1 Grid maintenance;
(1) Dirt on the grating should be removed promptly and the operating platform should be cleaned; (2) If the mattress is loose, deformed, missing or broken, it should be repaired or replaced promptly; (3) Rust removal and paint should be carried out regularly.
4. 4.3. 2 Operation and maintenance of the desludging machine: (1) Before operation, the core mechanism and electrical equipment should be checked; (2) During operation, regular inspections should be carried out and the machine should be stopped for inspection if any abnormal belt is found; (3) After shutdown, timely cleaning and maintenance should be carried out, and lubricating oil should be added.
(4) The ladder conveyor matched with the desludging machine should be regularly desludged, cleaned and lubricated;
(5) The desludging machine should be operated once a week when it is not in use; (6) Regular maintenance should be carried out in accordance with the requirements of the product standards. 4.4. 4
Maintenance of the water collection pool shall comply with the following provisions: Floating water on the surface of the water collection pool shall be cleared in time, and the water level shall be pumped down regularly to flush the pool. 4.4. 4.1
The water level gauge and water level gauge in the water collection pool shall be cleaned regularly and calibrated regularly. The water collection pool shall be regularly cleared of sediments such as sediments, and the corrosion of the pipes and valves shall be checked.
4.4.4.3
The concrete protective layer of the water collection pool wall shall be repaired when there is residue, cracks or corrosion.
4.4.4.5
4.4.4.6
The escalators and railings around the water collection pool shall be degreased and wiped regularly. The maintenance of the door in front of the water collection tank shall comply with the provisions of Article 4.4.1 of this Regulation. The maintenance of the water outlet shall comply with the following provisions: 4.4.5.1
The elevated water outlet shall not leak. When the concrete protective layer is peeling, cracking, or corroding, it shall be repaired in time.
5—23—8
4.4.5.2 The water outlet pressure shall not have water seepage and air leakage. When the sealing rubber pad, key plate, and bolt are aged and corroded, they shall be repaired in time. 4.4.5.3 The air vents of the pressure outlet shall not be blocked. 4.5 Related facilities
The equipment in the drainage system station shall be inspected and maintained regularly. The residual water pump, vacuum pump, ventilator, water supply facilities and other related facilities in the drainage pump station shall be inspected and maintained annually.
4. 5.3 The water hammer equipment should be installed indoors or in a special room, and should be regularly inspected, maintained and calibrated. Anti-freezing measures should be taken in winter.
Vibration control and computer control
4.6.1 The automatic control must be put into operation after trial operation: and should be inspected weekly and maintained regularly.
4. 6. 2 Computer control should comply with the following provisions; 4. 6. 2. 1
Regulations.
4. 6. 2. 2
The operation and management of the computer control system of the drainage pump station should be strictly implemented. The maintenance of computers and peripheral equipment should be carried out in accordance with the requirements of the manufacturer. Drainage facility maintenance technical data
The drainage facility management unit should establish and improve the technical data and equipment files of the drainage facilities.
New drainage facilities should have complete, accurate and clear completion technical data. 5.0.2
or engineering technical data shall include engineering construction text, technical design data, and completion acceptance data.
5.0.3 The maintenance data of drainage facilities shall be correct, timely, and clear. 5.0.4 The data of renovation and supplement of drainage facilities shall be filed and preserved in time. 5.0.5 The maintenance data managed by computer shall be backed up. 5.0.6 The sudden accidents or serious damages of drainage facilities shall be recorded in time, and shall be filed and preserved together with the analysis and disposal data. Appendix A Explanation of terms used in this regulation
A.0.1 In order to facilitate the distinction in the implementation of the provisions of this regulation, the terms with different degrees of strictness are explained as follows:
(1) To indicate strictness, it is necessary to do so: the positive word "must" is used, and the negative word "strictly prohibited" is used.
(2) To indicate strictness, it should be done under normal circumstances: the positive word "should" is used, and the negative word "should not" or "must not" is used. (3) To indicate that there is a slight choice, and the first thing to do when conditions permit is: "should" or "may", the positive word "thould not" is used, and the negative word "should not" is used.
A.0.2 The wording method for specifying that other relevant standards must be followed is "should be implemented in accordance with" and "should comply with the provisions of the association". Additional Notes
List of the editorial unit, participating units and
main drafters of this Code
Editorial unit: Shanghai Urban Drainage Management Office Participating units: Shanghai Municipal Engineering Management Office Harbin Drainage Management Office
Municipal Maintenance Department of Wuhan Municipal Bureau
Wuhan Drainage Pump Station Management Office
Tianjin Drainage Management Office
Xi'an Municipal Engineering Management Office
Beijing Municipal Engineering Management Office
Chongqing Municipal Maintenance Management Office
Nanning Municipal Engineering Management Office
Main drafters: Wang Yi'e, Wu Juru, Zhu Baoluo, Wang Funan, Han Zhijie, Wu Shibai, Li Cong, Wang
Niu Jianqiang, Hu Xiaoyan, Fan Chengliang, Wu Zengkui, Zhang Dongliao, Li Tanghua, Han Yuchao, Wang Shaowen, Yang Zhihua, Zheng Weijun
5—23—91. Maintenance of the grating;
(1) The dirt on the grating should be removed in time, and the operating platform should be cleaned; (2) When the mattress is loose, deformed, missing or broken, it should be repaired or replaced in time; (3) Rust and paint should be removed regularly.
4. 4.3. 2 Operation and maintenance of the desludging machine: (1) Before operation, the core mechanism and electrical equipment should be checked; (2) During operation, regular inspections should be carried out, and if abnormal belts are found, the machine should be stopped for inspection; (3) After shutdown, it should be cleaned and maintained in time, and lubricating oil should be added.
(4) The ladder conveyor matched with the desludging machine should be cleaned, cleaned and lubricated regularly;
(5) The desludging machine should be operated once a week during shutdown; (6) Regular maintenance should be carried out according to the requirements of product standards. 4.4. 4
Maintenance of the water collection pool shall comply with the following provisions: Floating water on the surface of the water collection pool shall be cleared in time, and the water level shall be pumped down regularly to flush the pool. 4.4. 4.1
The water level gauge and water level gauge in the water collection pool shall be cleaned regularly and calibrated regularly. The water collection pool shall be regularly cleared of sediments such as sediments, and the corrosion of the pipes and valves shall be checked.
4.4.4.3
The concrete protective layer of the water collection pool wall shall be repaired when there is residue, cracks or corrosion.
4.4.4.5
4.4.4.6
The escalators and railings around the water collection pool shall be degreased and wiped regularly. The maintenance of the door in front of the water collection tank shall comply with the provisions of Article 4.4.1 of this Regulation. The maintenance of the water outlet shall comply with the following provisions: 4.4.5.1
The elevated water outlet shall not leak. When the concrete protective layer is peeling, cracking, or corroding, it shall be repaired in time.
5—23—8
4.4.5.2 The water outlet pressure shall not have water seepage and air leakage. When the sealing rubber pad, key plate, and bolt are aged and corroded, they shall be repaired in time. 4.4.5.3 The air vents of the pressure outlet shall not be blocked. 4.5 Related facilities
The equipment in the drainage system station shall be inspected and maintained regularly. The residual water pump, vacuum pump, ventilator, water supply facilities and other related facilities in the drainage pump station shall be inspected and maintained annually.
4. 5.3 The water hammer equipment should be installed indoors or in a special room, and should be regularly inspected, maintained and calibrated. Anti-freezing measures should be taken in winter.
Vibration control and computer control
4.6.1 The automatic control must be put into operation after trial operation: and should be inspected weekly and maintained regularly.
4. 6. 2 Computer control should comply with the following provisions; 4. 6. 2. 1
Regulations.
4. 6. 2. 2
The operation and management of the computer control system of the drainage pump station should be strictly implemented. The maintenance of computers and peripheral equipment should be carried out in accordance with the requirements of the manufacturer. Drainage facility maintenance technical data
The drainage facility management unit should establish and improve the technical data and equipment files of the drainage facilities.
New drainage facilities should have complete, accurate and clear completion technical data. 5.0.2
or engineering technical data shall include engineering construction text, technical design data, and completion acceptance data.
5.0.3 The maintenance data of drainage facilities shall be correct, timely, and clear. 5.0.4 The data of renovation and supplement of drainage facilities shall be filed and preserved in time. 5.0.5 The maintenance data managed by computer shall be backed up. 5.0.6 The sudden accidents or serious damages of drainage facilities shall be recorded in time, and shall be filed and preserved together with the analysis and disposal data. Appendix A Explanation of terms used in this regulation
A.0.1 In order to facilitate the distinction in the implementation of the provisions of this regulation, the terms with different degrees of strictness are explained as follows:
(1) To indicate strictness, it is necessary to do so: the positive word "must" is used, and the negative word "strictly prohibited" is used.
(2) To indicate strictness, it should be done under normal circumstances: the positive word "should" is used, and the negative word "should not" or "must not" is used. (3) To indicate that there is a slight choice, and the first thing to do when conditions permit is: "should" or "may", the positive word "thould not" is used, and the negative word "should not" is used.
A.0.2 The wording method for specifying that other relevant standards must be followed is "should be implemented in accordance with" and "should comply with the provisions of the association". Additional Notes
List of the editorial unit, participating units and
main drafters of this Code
Editorial unit: Shanghai Urban Drainage Management Office Participating units: Shanghai Municipal Engineering Management Office Harbin Drainage Management Office
Municipal Maintenance Department of Wuhan Municipal Bureau
Wuhan Drainage Pump Station Management Office
Tianjin Drainage Management Office
Xi'an Municipal Engineering Management Office
Beijing Municipal Engineering Management Office
Chongqing Municipal Maintenance Management Office
Nanning Municipal Engineering Management Office
Main drafters: Wang Yi'e, Wu Juru, Zhu Baoluo, Wang Funan, Han Zhijie, Wu Shibai, Li Cong, Wang
Niu Jianqiang, Hu Xiaoyan, Fan Chengliang, Wu Zengkui, Zhang Dongliao, Li Tanghua, Han Yuchao, Wang Shaowen, Yang Zhihua, Zheng Weijun
5—23—91. Maintenance of the grating;
(1) The dirt on the grating should be removed in time, and the operating platform should be cleaned; (2) When the mattress is loose, deformed, missing or broken, it should be repaired or replaced in time; (3) Rust and paint should be removed regularly.
4. 4.3. 2 Operation and maintenance of the desludging machine: (1) Before operation, the core mechanism and electrical equipment should be checked; (2) During operation, regular inspections should be carried out, and if abnormal belts are found, the machine should be stopped for inspection; (3) After shutdown, it should be cleaned and maintained in time, and lubricating oil should be added.
(4) The ladder conveyor matched with the desludging machine should be cleaned, cleaned and lubricated regularly;
(5) The desludging machine should be operated once a week during shutdown; (6) Regular maintenance should be carried out according to the requirements of product standards. 4.4. 4
Maintenance of the water collection pool shall comply with the following provisions: Floating water on the surface of the water collection pool shall be cleared in time, and the water level shall be pumped down regularly to flush the pool. 4.4. 4.1
The water level gauge and water level gauge in the water collection pool shall be cleaned regularly and calibrated regularly. The water collection pool shall be regularly cleared of sediments such as sediments, and the corrosion of the pipes and valves shall be checked.
4.4.4.3
The concrete protective layer of the water collection pool wall shall be repaired when there is residue, cracks or corrosion.
4.4.4.5
4.4.4.6
The escalators and railings around the water collection pool shall be degreased and wiped regularly. The maintenance of the door in front of the water collection tank shall comply with the provisions of Article 4.4.1 of this Regulation. The maintenance of the water outlet shall comply with the following provisions: 4.4.5.1
The elevated water outlet shall not leak. When the concrete protective layer is peeling, cracking, or corroding, it shall be repaired in time.
5—23—8
4.4.5.2 The water outlet pressure shall not have water seepage and air leakage. When the sealing rubber pad, key plate, and bolt are aged and corroded, they shall be repaired in time. 4.4.5.3 The air vents of the pressure outlet shall not be blocked. 4.5 Related facilities
The equipment in the drainage system station shall be inspected and maintained regularly. The residual water pump, vacuum pump, ventilator, water supply facilities and other related facilities in the drainage pump station shall be inspected and maintained annually.
4. 5.3 The water hammer equipment should be installed indoors or in a special room, and should be regularly inspected, maintained and calibrated. Anti-freezing measures should be taken in winter.
Vibration control and computer control
4.6.1 The automatic control must be put into operation after trial operation: and should be inspected weekly and maintained regularly.
4. 6. 2 Computer control should comply with the following provisions; 4. 6. 2. 1
Regulations.
4. 6. 2. 2
The operation and management of the computer control system of the drainage pump station should be strictly implemented. The maintenance of computers and peripheral equipment should be carried out in accordance with the requirements of the manufacturer. Drainage facility maintenance technical data
The drainage facility management unit should establish and improve the technical data and equipment files of the drainage facilities.
New drainage facilities should have complete, accurate and clear completion technical data. 5.0.2
or engineering technical data shall include engineering construction text, technical design data, and completion acceptance data.
5.0.3 The maintenance data of drainage facilities shall be correct, timely, and clear. 5.0.4 The data of renovation and supplement of drainage facilities shall be filed and preserved in time. 5.0.5 The maintenance data managed by computer shall be backed up. 5.0.6 The sudden accidents or serious damages of drainage facilities shall be recorded in time, and shall be filed and preserved together with the analysis and disposal data. Appendix A Explanation of terms used in this regulation
A.0.1 In order to facilitate the distinction in the implementation of the provisions of this regulation, the terms with different degrees of strictness are explained as follows:
(1) To indicate strictness, it is necessary to do so: the positive word "must" is used, and the negative word "strictly prohibited" is used.
(2) To indicate strictness, it should be done under normal circumstances: the positive word "should" is used, and the negative word "should not" or "must not" is used. (3) To indicate that there is a slight choice, and the first thing to do when conditions permit is: "should" or "may", the positive word "thould not" is used, and the negative word "should not" is used.
A.0.2 The wording method for specifying that other relevant standards must be followed is "should be implemented in accordance with" and "should comply with the provisions of the association". Additional Notes
List of the editorial unit, participating units and
main drafters of this Code
Editorial unit: Shanghai Urban Drainage Management Office Participating units: Shanghai Municipal Engineering Management Office Harbin Drainage Management Office
Municipal Maintenance Department of Wuhan Municipal Bureau
Wuhan Drainage Pump Station Management Office
Tianjin Drainage Management Office
Xi'an Municipal Engineering Management Office
Beijing Municipal Engineering Management Office
Chongqing Municipal Maintenance Management Office
Nanning Municipal Engineering Management Office
Main drafters: Wang Yi'e, Wu Juru, Zhu Baoluo, Wang Funan, Han Zhijie, Wu Shibai, Li Cong, Wang
Niu Jianqiang, Hu Xiaoyan, Fan Chengliang, Wu Zengkui, Zhang Dongliao, Li Tanghua, Han Yuchao, Wang Shaowen, Yang Zhihua, Zheng Weijun
5—23—95. The computer-managed maintenance data should be backed up. 5.0.6 For sudden accidents or serious damage to drainage facilities, timely records must be made and the analysis and disposal data should be archived and preserved. Appendix A Explanation of terms used in this regulation
A.0.1 In order to facilitate the differentiated treatment when implementing the provisions of this regulation, the terms with different degrees of strictness are explained as follows:
(1) Indicates strictness and must be done: positive terms use "must"
negative terms use "strictly prohibited"
(2) Indicates strictness and should be done under normal circumstances: positive terms use "should"
negative terms use "should not" or "must not". (3) Indicates that there is a slight choice and the first thing to do when conditions permit is: "should" or "may", positive terms use "should not"
negative terms use "should not".
In clause A.0.2, the wording that specifies that other relevant standards must be followed is “should be followed” and “should comply with the regulations”. Additional Notes
List of the editorial unit, participating units and
main drafters of this Code
Editorial unit: Shanghai Urban Drainage Management Office Participating units: Shanghai Municipal Engineering Management Office Harbin Drainage Management Office
Municipal Maintenance Department of Wuhan Municipal Bureau
Wuhan Drainage Pump Station Management Office
Tianjin Drainage Management Office
Xi'an Municipal Engineering Management Office
Beijing Municipal Engineering Management Office
Chongqing Municipal Maintenance Management Office
Nanning Municipal Engineering Management Office
Main drafters: Wang Yi'e, Wu Juru, Zhu Baoluo, Wang Funan, Han Zhijie, Wu Shibai, Li Cong, Wang
Niu Jianqiang, Hu Xiaoyan, Fan Chengliang, Wu Zengkui, Zhang Dongliao, Li Tanghua, Han Yuchao, Wang Shaowen, Yang Zhihua, Zheng Weijun
5—23—95. The computer-managed maintenance data should be backed up. 5.0.6 For sudden accidents or serious damage to drainage facilities, timely records must be made and the analysis and disposal data should be archived and preserved. Appendix A Explanation of terms used in this regulation
A.0.1 In order to facilitate the differentiated treatment when implementing the provisions of this regulation, the terms with different degrees of strictness are explained as follows:
(1) Indicates strictness and must be done: positive terms use "must"
negative terms use "strictly prohibited"
(2) Indicates strictness and should be done under normal circumstances: positive terms use "should"
negative terms use "should not" or "must not". (3) Indicates that there is a slight choice and the first thing to do when conditions permit is: "should" or "may", positive terms use "should not"
negative terms use "should not".
In clause A.0.2, the wording that specifies that other relevant standards must be followed is “should be followed” and “should comply with the regulations”. Additional Notes
List of the editorial unit, participating units and
main drafters of this Code
Editorial unit: Shanghai Urban Drainage Management Office Participating units: Shanghai Municipal Engineering Management Office Harbin Drainage Management Office
Municipal Maintenance Department of Wuhan Municipal Bureau
Wuhan Drainage Pump Station Management Office
Tianjin Drainage Management Office
Xi'an Municipal Engineering Management Office
Beijing Municipal Engineering Management Office
Chongqing Municipal Maintenance Management Office
Nanning Municipal Engineering Management Office
Main drafters: Wang Yi'e, Wu Juru, Zhu Baoluo, Wang Funan, Han Zhijie, Wu Shibai, Li Cong, Wang
Niu Jianqiang, Hu Xiaoyan, Fan Chengliang, Wu Zengkui, Zhang Dongliao, Li Tanghua, Han Yuchao, Wang Shaowen, Yang Zhihua, Zheng Weijun
5—23—9
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