SY/T 0089-1996 Specification for water supply and drainage design of oil and gas plants, stations and reservoirs
Some standard content:
Oil and Gas Industry Standard of the People's Republic of China Code for design of water and wastewater for oil-gas plant, station and depotSY/ T 008996 Edited by: Survey and Design Institute of Shengli Petroleum Administration Bureau Approved by: Petroleum Industry Press of China National Petroleum Corporation Beijing 1996 System selection Water supply system selection Drainage system selection · 3 Water supply Water use quota · Water quality and prevention of water pollution Design flow and pipeline hydraulic calculation Pipeline layout and laying Pipe materials, valves and water meters Pumps, suction wells Storage Local water treatment of water tanks (pools), elevated water tanks and pressure water supply equipment
Discharge and design flow
Hydraulic calculation of drainage pipes (channels)
Pipeline layout, laying and related structures
Pipeline material selection, connection
Rainwater and product wastewater pumping
Precipitated sewage treatment and recycling
Appendix A
Explanation of terms used in this specification
Additional explanation·
(8)
(13)
(14)
(33)
Oil and gas plants, stations. Explanation of the provisions of the design specification for water supply and drainage of reservoirs, (39) Document of China National Petroleum Corporation
(96) CNPC Technical Supervision No. 209
Notice on the approval and release of the "Design Specification for Water Supply and Drainage of Oil and Gas Plants, Stations and Reservoirs" and other oil and gas
Industry standards
To all relevant units:
The "Design Specification for Water Supply and Drainage of Oil and Gas Plants, Stations and Reservoirs" and other three oil and gas industry standards (draft) have been reviewed and approved and are now approved as oil and gas industry standards and are hereby released. The numbers and names of the various standards are as follows: Serial number
SY 7 T 0089-96
SV2T 05111996
SY/T 05121996
Oil and Gas Plant. Station and reservoir water supply and drainage design specification Oil storage tank breathing valve
(Replace SY 751187)
Oil storage tank flame arrester
(Replace SY 7512-87)
The above standards shall be implemented from October 1, 1996, China National Petroleum Corporation
April 21, 1996
1.0.1 In order to make the design of water supply and drainage engineering of oil and gas plants, stations and reservoirs advanced in technology, economical and reasonable, safe and applicable, and environmentally friendly, this specification is formulated. 1.0.2 This specification is applicable to the design of water supply and drainage engineering of oil and gas plants, stations and reservoirs for new construction, expansion and reconstruction of onshore oil and gas fields and long-distance pipelines. It is not applicable to beaches, swamps and collapsible loess areas. It can be implemented as a reference in desert areas. 1.0.3 The design of water supply and drainage engineering for oil and gas plants, stations and reservoirs should make full use of the existing system engineering of oil and gas fields, and should be uniformly planned and implemented in stages. 1.0.4 The design of water supply and drainage engineering for oil and gas plants, stations and reservoirs, in addition to complying with this specification, should also comply with the requirements of the relevant national standards and specifications in force. 2 System selection
2.1 Water supply system selection
2.1.1 The selection of water supply system shall be determined after technical and economic comparison based on the requirements of water quality, water temperature, water pressure and water volume for various water uses such as life, production, fire fighting, etc., combined with comprehensive factors such as local hydrogeological conditions and external water supply systems. 2.1.2 Fresh water should be used less for production water, and recycled water should be used as much as possible, and one water should be used for multiple purposes. 2.1.3 When the water quality indicators of the external water supply system cannot meet the production needs, water quality treatment shall be carried out. In a region, when two or more stations are required to carry out water treatment for the same or similar projects: decentralized or centralized treatment should be determined based on technical and economic comparison. 2.1.4 The water supply system should make full use of the water pressure of the external water supply network to directly supply water. When the water pressure in the network is insufficient, it is advisable to set up a storage and booster water supply device. 2.2 Selection of drainage system
2.2.1 The drainage of oil and gas plants, stations, and reservoirs can be divided into the following nine categories according to water quality (1) Oily wastewater.
(2) Organic solvent wastewater from natural gas purification plants. (3) Production wastewater.
(4) Domestic sewage.
(5) Rainwater
2.2.2 The selection of drainage system should be determined based on the nature of sewage, combined with the drainage system of oil and gas fields and the principle of comprehensive utilization and environmental protection to determine diversion or confluence. 2.2.3 The drainage of oil and gas plants, stations, and reservoirs should be treated separately according to the nature of sewage, the degree of pollution, and environmental protection requirements. The treated sewage should be used for water injection, thermal recovery boiler feed water: crude oil mixed with water or its relaxation water.
2.2.4 Other sewage entering the oily sewage system: should prevent the scale, corrosion and bacterial proliferation caused by mixing and causing harm. 2
2.2.5 When the quality of production water meets the provisions of the current national standard "Comprehensive Sewage Discharge Standard" GB8978, it can be discharged directly without treatment. 2.2.6 Cleaning and flushing wastewater shall not be discharged arbitrarily, and should be discharged into the oily sewage system after sand settling.
2.2.7 The drainage of flush toilets can be discharged into the oil and gas field production or living drainage system after being treated in the septic tank.
3 Water supply
31 Water quota
The production water quota, water pressure and water use conditions should be determined according to the process requirements. The water consumption for cooling process equipment and pumps shall be determined according to the requirements of the manufacturer. The water quota for sun protection spray cooling of storage tanks shall be determined according to Table 3.1.3. The water quota for anti-wear spray cooling of storage tanks
Energy storage type
Spherical or horizontal
Arch tank
Water quota
0.18m/ (m2- h)
0.4-- 0.6ml/ (m* h)
Note: 1. The cooling water belt of spherical or horizontal tanks shall be calculated according to half of the surface area: The cooling water consumption for energy supply shall be calculated according to the perimeter of the storage tank 3.1.4
The supplementary water volume of the diffuse circulating water system can be calculated according to the following formula: Qm=Q.+Q+O
Q.- K+ Ag
Supplementary water volume of circulating water system (m/h):
Evaporation loss water volume (m2/h):
Sewage discharge volume and leakage loss volume (nh)
Cooling tower outlet and outlet temperature difference (℃)
Circulating water volume (m/h)
.Table 3.1.3
(3.1.4- 1)
(3.1.4- 2)
(3.1.4— 3)wwW.bzxz.Net
Wind loss water volume (m3/h) can generally be taken as 0.1%-0.5% of the circulating water volume.
Concentration multiples can be taken as 2~5:
K-factor (1℃C) can be taken according to Table 3.1.4. When the air temperature is an intermediate value, the interpolation method can be used for calculation.
Coefficient K value
Air temperature (C)
Note: The air temperature in the table is the design dry bulb temperature around the cooling tower. 20
0,0015
Table 3.1.4
The amount of water to be fed to the boiler and water jacket boiler should be determined at 1% to 3% of the circulating water volume. 3.1.5
The water consumption quota for the regeneration of the boiler water softening resin should be determined in accordance with the current national standard GBJ109 "Design Code for Softening and Desalination of Industrial Water". 3.1.7
The water quota for tank flushing should be determined according to Table 3.1.7, and the maximum water consumption is 7~10m/h
Water quota for tank flushing
Tank volume
·Water consumption per time
Table 3.1.7
The water quota for flushing the ground should generally be 2~3L per time. 10000
3.1.9 The water quota for flushing cars in the garage should be determined according to the following quotas based on the road surface grade and contamination degree:
Each car: 250~400L/d;
Each truck: 400~600L/d
Note: The flushing time for each car is 10nmin: calculated based on flushing once a month. 3.1.10 The water quota for production personnel to shower should be determined according to Table 3.1.10. The duration of shower water is 1h.
Water quota for production personnel to shower
Dust production positions
Crude oil loading and unloading, sewage treatment, boiler room dosing, electrician.
Table 3.1.10
Title shift
Title dance class
Water quota
Shift dormitory, office building and workshop water quota and hourly variation coefficient should be determined according to Table 3.1,11 Determine,
Shift dormitory: Office building and workshop domestic water quota Building name
Shift dormitory
Office building
Per person per product
Per person per shift
Per person per shift
Domestic water quota (maximum daily L)
50-100
Greening water quota is 2~4L/m each time
Table 3.1.11
Hourly change Chemical coefficient
The fire-fighting water consumption shall be determined in accordance with the current national standards "Code for Fire Protection Design of Crude Oil and Natural Gas Engineering" GB50183 and "Code for Fire Protection Design of Buildings" GBJ16. 3.1.14
The unforeseen water consumption and water loss in the pipeline network can be calculated together at 10%~15% of the maximum daily water consumption
3.1.15 The rated flow rate, equivalent, branch pipe diameter and outflow head of sanitary ware water supply shall be determined according to Table 3.1.15.
Rated flow, equivalent, and outflow head of sanitary appliances water supply
Name of water supply accessories
Sewage basin (pool) faucet
One wide opening
Canteen kitchen wash basin (pool) ice faucet
Centralized water supply faucet
Two wide openings
Ordinary faucet
Face wash basin faucet without plug, wash basin faucet one wide opening
Face wash basin with plug ice faucet
Trough faucet
Two valve openings
Ordinary faucet ice
(L/s)
Branch pipe diameter
Table 3.1.15
Water distribution point
Required outflow head
Shower
Toilet. Stool
Small vessel, urinal
Laboratory test faucet
Head (gooseneck)
Name of water supply accessories
One valve open
Two valves open
Float valve for flushing water tank
Self-closing flushing valve
Manual flushing valve
Self-closing flushing
Urinal eaves Multi-hole flushing pipe (per meter length)
Wine tap
3.2 Water quality and prevention of water pollution
Continued Table 3.1.15
Required outflow head before water distribution point
(k Pn)
25～40
According to product requirements
According to product requirements
According to usage requirements
The quality of drinking water shall comply with the requirements of the current national standard "3.2.1 Hygienic Standard for Drinking Water" GB5749.
3.2.2 The quality of production water shall be determined according to the process requirements. (1) The quality of oilfield injection water shall comply with the requirements of the current industry standard "Recommended Indicators and Analysis Methods for Water Quality for Clastic Reservoirs" SYT5329 or the requirements of the oil and gas field injection water quality standards.
(2) The quality of steam generator (thermal recovery boiler) feed water shall comply with the requirements of the current industry standard "Design Specifications for Heavy Oil Gathering and Steam Injection Systems" SY0027 or the requirements of the oilfield thermal recovery boiler feed water quality standards. (3) The quality of industrial boiler feed water shall comply with the requirements of the current national standard "Low-pressure Boiler Water Quality Standard" GB～T1576.
(4) Water quality of open-circulation cooling water: It should comply with the requirements of the current national standard "Design Specification for Industrial Circulating Cooling Water Treatment" GBJ50. 3.2 Drinking water shall not be sent back and polluted. The design shall meet the following requirements:
(1) The outlet of the water supply pipe shall not be filled with any liquid or impurities (the minimum air gap of the overflow water level of the water supply pipe water supply equipment shall not be less than 2.5 times the diameter of the water supply pipe at the outlet. (3) When it is impossible to set the minimum air barrier for special equipment or production water equipment, an anti-pollution partition shall be installed and other effective isolation measures shall be taken. 324 Drinking water pipes shall not be connected to non-drinking water pipes. 3.2.5 It is strictly forbidden to directly connect drinking water pipes with toilets. 32.6 Water tanks (pools) used for production, life and fire protection water supply shall take measures to prevent water quality deterioration and ensure that the fire protection reserve water is not used for ground use. 3.3 Water pressure
3.3.1 The water supply pressure of oil and gas plants, stations and depots shall meet the water pressure requirements for production, life and fire protection water.
3.32 The water pressure of the supplementary water tank (elevated water tank) shall not be less than the maximum water pressure of the tank plus 50kPa surplus water pressure. 3.3.3 The water pressure of domestic water shall meet the requirement that the outflow head before the most unfavorable water distribution point shall not be less than that specified in Article 3.1.15 of this Code and shall not be greater than 600kPa. 3.3.4 The water pressure of fire water supply shall meet the requirements of fire water supply pressure under the most unfavorable conditions. (1) The fire water supply pressure of buildings in oil and gas plants, stations and depots shall comply with the provisions of the current national standard "Code for Fire Protection Design of Buildings" CB16. (2) The fire water supply pressure of the storage tank area shall comply with the provisions of the current national standard "Code for Fire Protection Design of Crude Oil and Natural Gas Engineering". 3.4 Design flow and pipeline hydraulic calculations 3.4.1 The maximum hourly flow and design second flow of production water shall be calculated and determined according to the process requirements or calculated according to the water quota specified in Section 3.1 of this Code. 3.4.2 The maximum hourly flow rate of other water use shall be determined according to the water use quota specified in Section 3.1 of this Code.
3.4.3 The diameter of the water supply pipe shall be determined according to the design second flow rate, the water pressure that can be guaranteed by the external pipe network and the water pressure required by the water distribution point or fire protection system at the most unfavorable location. 3.4.4 The design second flow rate of domestic water supply pipelines in buildings such as shift dormitories, office buildings, etc. of oil and gas plants, stations and depots shall be calculated according to the following formula: 7=0.2α
Calculate the design second flow rate of water supply of the pipe section (Ls)NCalculate the total number of sanitary ware water supply equivalents of the pipe section; (3.4.4)
--Coefficient determined according to the use of the building, shift dormitories-2.5: public buildings-1.5.
Note: 1 If the calculated value is less than the rated water flow rate of the largest dust collector on the pipe section, the rated water flow rate of the largest sanitary ware shall be used as the design second flow rate, zero If the calculated value is greater than the flow value obtained by adding the rated flow rate of sanitary appliances on the pipe section, the flow value obtained by adding the rated flow rate of sanitary appliances should be used. 3.4.5 The design second flow rate of domestic water supply pipelines in buildings such as living rooms, public bathrooms, public canteens, and laboratories in oil and gas plants, stations, and depots shall be calculated according to the following formula: q=-.-b
Where qg
Calculate the design second flow rate of water supply in the pipe section (L/s): (3.4.5)
Rated flow rate of water supply of a sanitary appliance of the same type (L/s): Number of sanitary appliances of the same type
Percentage of sanitary appliances supplying water at the same time shall be adopted according to Table 3.4.5-1, Table 3.4.5-2, and Table 3.4.5-3
Note: If the calculated value is less than the largest rated flow rate of water supply of sanitary appliances on the pipe section: The largest rated flow rate of water supply of sanitary appliances shall be used as the design second flow rate. Living room, public bathroom sanitary ware
Percentage of water supply at the same time
Name of sanitary ware
Wash basin (pool)
Table 3.4.5-1
Percentage of water supply at the same time (%)
Living room
If there is no process requirement, 33 is adopted
Public bathroom15
Water distribution point
Required outflow head
Shower
Toilet. Toilet
Stool, urinal
Laboratory tester
Head (gooseneck)
Name of water supply accessories
One valve open
Two valves open
Flushing water tank float valve
Self-closing flushing valve
Manual flushing valve
Self-closing flushing
Urinal eaves Multi-hole flushing pipe (per meter length)
Drinking tap
3.2 Water quality and prevention of water pollution
Continued Table 3.1.15
Water distribution point front
Required outflow head
(k Pn)
25～40
According to product requirements
According to product requirements
According to usage requirements
The quality of drinking water shall comply with the requirements of the current national standard "3.2.1 Hygienic Standard for Drinking Water" GB5749.
3.2.2 The quality of production water shall be determined according to the process requirements. (1) The quality of oilfield injection water shall comply with the requirements of the current industry standard "Recommended Indicators and Analysis Methods for Water Quality for Clastic Reservoirs" SYT5329 or the requirements of the oil and gas field injection water quality standards.
(2) The quality of steam generator (thermal recovery boiler) feed water shall comply with the requirements of the current industry standard "Design Specifications for Heavy Oil Gathering and Steam Injection Systems" SY0027 or the requirements of the oilfield thermal recovery boiler feed water quality standards. (3) The quality of industrial boiler feed water shall comply with the requirements of the current national standard "Low-pressure Boiler Water Quality Standard" GB～T1576.
(4) Water quality of open-circulation cooling water: It should comply with the requirements of the current national standard "Design Specification for Industrial Circulating Cooling Water Treatment" GBJ50. 3.2 Drinking water shall not be sent back and polluted. The design shall meet the following requirements: (1) The outlet of the water supply pipe shall not be filled with any liquid or impurities (the minimum air gap of the overflow water level of the water supply pipe water supply equipment shall not be less than 2.5 times the diameter of the water supply pipe at the outlet. (3) When it is impossible to set the minimum air barrier for special equipment or production water equipment, an anti-pollution partition shall be installed and other effective isolation measures shall be taken. 324 Drinking water pipes shall not be connected to non-drinking water pipes. 3.2.5 It is strictly forbidden to directly connect drinking water pipes with toilets. 32.6 Water tanks (pools) used for production, life and fire protection water supply shall take measures to prevent water quality deterioration and ensure that the fire protection reserve water is not used for ground use. 3.3 Water pressure 3.3.1 The water supply pressure of oil and gas plants, stations and depots shall meet the water pressure requirements for production, life and fire protection water. 3.32 The water pressure of the supplementary water tank (elevated water tank) shall not be less than the maximum water pressure of the tank plus 50kPa surplus water pressure. 3.3.3 The water pressure of domestic water shall meet the requirement that the outflow head before the most unfavorable water distribution point shall not be less than that specified in Article 3.1.15 of this Code and shall not be greater than 600kPa. 3.3.4 The water pressure of fire water supply shall meet the requirements of fire water supply pressure under the most unfavorable conditions. (1) The fire water supply pressure of buildings in oil and gas plants, stations and depots shall comply with the provisions of the current national standard "Code for Fire Protection Design of Buildings" CB16. (2) The fire water supply pressure of the storage tank area shall comply with the provisions of the current national standard "Code for Fire Protection Design of Crude Oil and Natural Gas Engineering". 3.4 Design flow and pipeline hydraulic calculations 3.4.1 The maximum hourly flow and design second flow of production water shall be calculated and determined according to the process requirements or calculated according to the water quota specified in Section 3.1 of this Code. 3.4.2 The maximum hourly flow rate of other water use shall be determined according to the water use quota specified in Section 3.1 of this Code.
3.4.3 The diameter of the water supply pipe shall be determined according to the design second flow rate, the water pressure that can be guaranteed by the external pipe network and the water pressure required by the water distribution point or fire protection system at the most unfavorable location. 3.4.4 The design second flow rate of domestic water supply pipelines in buildings such as shift dormitories, office buildings, etc. of oil and gas plants, stations and depots shall be calculated according to the following formula: 7=0.2α
Calculate the design second flow rate of water supply of the pipe section (Ls)NCalculate the total number of sanitary ware water supply equivalents of the pipe section; (3.4.4)
--Coefficient determined according to the use of the building, shift dormitories-2.5: public buildings-1.5.
Note: 1 If the calculated value is less than the rated water flow rate of the largest dust collector on the pipe section, the rated water flow rate of the largest sanitary ware shall be used as the design second flow rate, zero If the calculated value is greater than the flow value obtained by adding the rated flow rate of sanitary appliances on the pipe section, the flow value obtained by adding the rated flow rate of sanitary appliances should be used. 3.4.5 The design second flow rate of domestic water supply pipelines in buildings such as living rooms, public bathrooms, public canteens, and laboratories in oil and gas plants, stations, and depots shall be calculated according to the following formula: q=-.-b
Where qg
Calculate the design second flow rate of water supply in the pipe section (L/s): (3.4.5)
Rated flow rate of water supply of a sanitary appliance of the same type (L/s): Number of sanitary appliances of the same type
Percentage of sanitary appliances supplying water at the same time shall be adopted according to Table 3.4.5-1, Table 3.4.5-2, and Table 3.4.5-3
Note: If the calculated value is less than the largest rated flow rate of water supply of sanitary appliances on the pipe section: The largest rated flow rate of water supply of sanitary appliances shall be used as the design second flow rate. Living room, public bathroom sanitary ware
Percentage of water supply at the same time
Name of sanitary ware
Wash basin (pool)
Table 3.4.5-1
Percentage of water supply at the same time (%)
Living room
If there is no process requirement, 33 is adopted
Public bathroom15
Water distribution point
Required outflow head
Shower
Toilet. Toilet
Stool, urinal
Laboratory tester
Head (gooseneck)
Name of water supply accessories
One valve open
Two valves open
Flushing water tank float valve
Self-closing flushing valve
Manual flushing valve
Self-closing flushing
Urinal eaves Multi-hole flushing pipe (per meter length)
Drinking tap
3.2 Water quality and prevention of water pollution
Continued Table 3.1.15
Water distribution point front
Required outflow head
(k Pn)
25～40
According to product requirements
According to product requirements
According to usage requirements
The quality of drinking water shall comply with the requirements of the current national standard "3.2.1 Hygienic Standard for Drinking Water" GB5749.
3.2.2 The quality of production water shall be determined according to the process requirements. (1) The quality of oilfield injection water shall comply with the requirements of the current industry standard "Recommended Indicators and Analysis Methods for Water Quality for Clastic Reservoirs" SYT5329 or the requirements of the oil and gas field injection water quality standards.
(2) The quality of steam generator (thermal recovery boiler) feed water shall comply with the requirements of the current industry standard "Design Specifications for Heavy Oil Gathering and Steam Injection Systems" SY0027 or the requirements of the oilfield thermal recovery boiler feed water quality standards. (3) The quality of industrial boiler feed water shall comply with the requirements of the current national standard "Low-pressure Boiler Water Quality Standard" GB～T1576.
(4) Water quality of open-circulation cooling water: It should comply with the requirements of the current national standard "Design Specification for Industrial Circulating Cooling Water Treatment" GBJ50. 3.2 Drinking water shall not be sent back and polluted. The design shall meet the following requirements:
(1) The outlet of the water supply pipe shall not be filled with any liquid or impurities (the minimum air gap of the overflow water level of the water supply pipe water supply equipment shall not be less than 2.5 times the diameter of the water supply pipe at the outlet. (3) When it is impossible to set the minimum air barrier for special equipment or production water equipment, an anti-pollution partition shall be installed and other effective isolation measures shall be taken. 324 Drinking water pipes shall not be connected to non-drinking water pipes. 3.2.5 It is strictly forbidden to directly connect drinking water pipes with toilets. 32.6 Water tanks (pools) used for production, life and fire protection water supply shall take measures to prevent water quality deterioration and ensure that the fire protection reserve water is not used for ground use. 3.3 Water pressure
3.3.1 The water supply pressure of oil and gas plants, stations and depots shall meet the water pressure requirements for production, life and fire protection water.
3.32 The water pressure of the supplementary water tank (elevated water tank) shall not be less than the maximum water pressure of the tank plus 50kPa surplus water pressure. 3.3.3 The water pressure of domestic water shall meet the requirement that the outflow head before the most unfavorable water distribution point shall not be less than that specified in Article 3.1.15 of this Code and shall not be greater than 600kPa. 3.3.4 The water pressure of fire water supply shall meet the requirements of fire water supply pressure under the most unfavorable conditions. (1) The fire water supply pressure of buildings in oil and gas plants, stations and depots shall comply with the provisions of the current national standard "Code for Fire Protection Design of Buildings" CB16. (2) The fire water supply pressure of the storage tank area shall comply with the provisions of the current national standard "Code for Fire Protection Design of Crude Oil and Natural Gas Engineering". 3.4 Design flow and pipeline hydraulic calculations 3.4.1 The maximum hourly flow and design second flow of production water shall be calculated and determined according to the process requirements or calculated according to the water quota specified in Section 3.1 of this Code. 3.4.2 The maximum hourly flow rate of other water use shall be determined according to the water use quota specified in Section 3.1 of this Code.
3.4.3 The diameter of the water supply pipe shall be determined according to the design second flow rate, the water pressure that can be guaranteed by the external pipe network and the water pressure required by the water distribution point or fire protection system at the most unfavorable location. 3.4.4 The design second flow rate of domestic water supply pipelines in buildings such as shift dormitories, office buildings, etc. of oil and gas plants, stations and depots shall be calculated according to the following formula: 7=0.2α
Calculate the design second flow rate of water supply of the pipe section (Ls)NCalculate the total number of sanitary ware water supply equivalents of the pipe section; (3.4.4)
--Coefficient determined according to the use of the building, shift dormitories-2.5: public buildings-1.5.
Note: 1 If the calculated value is less than the rated water flow rate of the largest dust collector on the pipe section, the rated water flow rate of the largest sanitary ware shall be used as the design second flow rate, zero If the calculated value is greater than the flow value obtained by adding the rated flow rate of sanitary appliances on the pipe section, the flow value obtained by adding the rated flow rate of sanitary appliances should be used. 3.4.5 The design second flow rate of domestic water supply pipelines in buildings such as living rooms, public bathrooms, public canteens, and laboratories in oil and gas plants, stations, and depots shall be calculated according to the following formula: q=-.-b
Where qg
Calculate the design second flow rate of water supply in the pipe section (L/s): (3.4.5)
Rated flow rate of water supply of a sanitary appliance of the same type (L/s): Number of sanitary appliances of the same type
Percentage of sanitary appliances supplying water at the same time shall be adopted according to Table 3.4.5-1, Table 3.4.5-2, and Table 3.4.5-3
Note: If the calculated value is less than the largest rated flow rate of water supply of sanitary appliances on the pipe section: The largest rated flow rate of water supply of sanitary appliances shall be used as the design second flow rate. Living room, public bathroom sanitary ware
Percentage of water supply at the same time
Name of sanitary ware
Wash basin (pool)
Table 3.4.5-1
Percentage of water supply at the same time (%)
Living room
If there is no process requirement, use 33
Public bathroom4 Fire water supply pressure should meet the fire water supply pressure requirements under the most unfavorable conditions. (1) The fire water supply pressure of oil and gas plants, stations and warehouses should comply with the provisions of the current national standard "Code for Fire Protection Design of Buildings" CB16. (2) The fire water supply pressure of the tank area should comply with the provisions of the current national standard "Code for Fire Protection Design of Crude Oil and Natural Gas Engineering". 3.4 Design flow and pipeline hydraulic calculation
3.4.1 The maximum hourly flow and design second flow of production water shall be determined according to the process requirements or the water quota specified in Section 3.1 of this Code. 3.4.2 The maximum hourly flow of other water shall be determined according to the water quota specified in Section 3.1 of this Code.
3.4.3 The diameter of the water supply pipe shall be determined according to the design second flow, the water pressure guaranteed by the external pipe network and the water pressure required by the most unfavorable water distribution point or fire protection system. 3.4.4 The design second flow of domestic water supply pipelines in shift dormitories, office buildings and other buildings in oil and gas plants, stations and depots shall be calculated according to the following formula: 7=0.2α
Calculate the design second flow of water supply of the pipe section (Ls)NCalculate the total number of sanitary ware water supply equivalents of the pipe section; (3.4.4)
--Coefficient determined according to the use of the building, shift dormitory-2.5: public building-1.5.
Note: 1 If the calculated value is smaller than the rated water flow of the largest dust collector on the pipe section, the rated water flow of the largest sanitary appliance should be used as the design second flow; if the calculated value is larger than the flow value obtained by adding the rated water flow of the sanitary appliances on the pipe section, the flow value obtained by adding the rated water flow of the sanitary appliances should be used. 3.4.5 The design flow rate in seconds of domestic water supply pipelines in living rooms, public bathrooms, public canteens, laboratories and other buildings in oil and gas plants, stations and depots shall be calculated according to the following formula: q=-.-b
Wherein, qg
Calculate the design flow rate in seconds of water supply of the pipe section (L/s):(3.4.5)
Rated water supply flow rate of a sanitary appliance of the same type (L/s):Number of sanitary appliances of the same type
The percentage of sanitary appliances supplied with water simultaneously shall be adopted according to Table 3.4.5-1, Table 3.4.5-2 and Table 3.4.5-3
Note: If the calculated value is less than the rated flow rate of water supply of the largest sanitary appliance on the pipe section: The rated flow rate of water supply of the largest sanitary appliance shall be adopted as the design flow rate in seconds. Living room, public bathroom sanitary ware
Percentage of water supply at the same time
Name of sanitary ware
Wash basin (pool)
Table 3.4.5-1
Percentage of water supply at the same time (%)
Living room
If there is no process requirement, 33 is adopted
Public bathroom4 Fire water supply pressure should meet the fire water supply pressure requirements under the most unfavorable conditions. (1) The fire water supply pressure of oil and gas plants, stations and warehouses should comply with the provisions of the current national standard "Code for Fire Protection Design of Buildings" CB16. (2) The fire water supply pressure of the tank area should comply with the provisions of the current national standard "Code for Fire Protection Design of Crude Oil and Natural Gas Engineering". 3.4 Design flow and pipeline hydraulic calculation
3.4.1 The maximum hourly flow and design second flow of production water shall be determined according to the process requirements or the water quota specified in Section 3.1 of this Code. 3.4.2 The maximum hourly flow of other water shall be determined according to the water quota specified in Section 3.1 of this Code.
3.4.3 The diameter of the water supply pipe shall be determined according to the design second flow, the water pressure guaranteed by the external pipe network and the water pressure required by the most unfavorable water distribution point or fire protection system. 3.4.4 The design second flow of domestic water supply pipelines in shift dormitories, office buildings and other buildings in oil and gas plants, stations and depots shall be calculated according to the following formula: 7=0.2α
Calculate the design second flow of water supply of the pipe section (Ls)NCalculate the total number of sanitary ware water supply equivalents of the pipe section; (3.4.4)
--Coefficient determined according to the use of the building, shift dormitory-2.5: public building-1.5.
Note: 1 If the calculated value is smaller than the rated water flow of the largest dust collector on the pipe section, the rated water flow of the largest sanitary appliance should be used as the design second flow; if the calculated value is larger than the flow value obtained by adding the rated water flow of the sanitary appliances on the pipe section, the flow value obtained by adding the rated water flow of the sanitary appliances should be used. 3.4.5 The design flow rate in seconds of domestic water supply pipelines in living rooms, public bathrooms, public canteens, laboratories and other buildings in oil and gas plants, stations and depots shall be calculated according to the following formula: q=-.-b
Wherein, qg
Calculate the design flow rate in seconds of water supply of the pipe section (L/s):(3.4.5)
Rated water supply flow rate of a sanitary appliance of the same type (L/s):Number of sanitary appliances of the same type
The percentage of sanitary appliances supplied with water simultaneously shall be adopted according to Table 3.4.5-1, Table 3.4.5-2 and Table 3.4.5-3
Note: If the calculated value is less than the rated flow rate of water supply of the largest sanitary appliance on the pipe section: The rated flow rate of water supply of the largest sanitary appliance shall be adopted as the design flow rate in seconds. Living room, public bathroom sanitary ware
Percentage of water supply at the same time
Name of sanitary ware
Wash basin (pool)
Table 3.4.5-1
Percentage of water supply at the same time (%)
Living room
If there is no process requirement, 33 is adopted
Public bathroom
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