GB 13077-2004 Periodic inspection and evaluation of aluminum alloy seamless gas cylinders
Some standard content:
: : : : : : : : : : : : : : : 3 Inspection agency. Inspection cycle and inspection items 3.1 Inspection agency
The inspection agency that conducts regular inspection of lead bottles should have the records required by GB12135 and be approved by the national safety supervision agency for lead bottles. The inspection agency must be equipped with special test instruments and equipment to test the performance indicators of calcium bottles. : : : : : : : : : : : : : : : This provision also applies to 5.4.1, 10.1.4. 5.2 Inspection and evaluation of dents
5.2.1 The false reporting rate of steel cylinders with a dent depth exceeding 1.5mm or greater than 1/40 of the short diameter of the dent. 5.2.2 When the dent on the bottle body contains scratches or other defects, if the depth of the defect exceeds the provisions of 5.2.2 or 5.2.3, or the degree of its defect is smaller than the provisions of 5.1.2 or 5.2.1, but the depth of the dent exceeds 1.2mm, then the aluminum bottle should be reported. 5.3 Inspection and assessment of heat damage
Aluminum plates with damaged quality due to scars, welding marks or burns caused by open flames should be reported. 5.4 Inspection and assessment of corrosion
5.4.1 The inspection and assessment of the body's pitting corrosion, linear corrosion, local corrosion and full corrosion of the material thickness of the bottle should be reported.
5.4.2 Due to severe corrosion, the aluminum plate whose degree of corrosion cannot be determined should be reported as follows: 5.5 Inspection and evaluation of seat dislocation
GB 13077-·2004
For the bottom of the bottle, if the bottom is loose, it is necessary to repair it. For the loose bottom, the material and bricks that cannot be repaired, the bottle with a distance between the support surface and the lowest point of the bottom less than 1rm should be measured. 5.6 Inspection and evaluation of body deformation
For the steel body with the following deformations:) The measurement of the same surface is greater than or equal to the difference between the measured value and the effective value, which exceeds 2% of the average outer diameter of the surface. (1) The straightness of the component exceeds 2% of the straight length of the body. 6 Hardness measurement
6.1 Determination method
For the hardness measurement, the method should be in accordance with the standard of GB/230 or G/T221. 6. 2 To the fixed position
The position of the measuring point should be located on the cylinder within m from the bottom of the bottle, the transition area between the cylinder and the bottom of the plate, and the surface of the bottom of the plate: 6.3 Evaluation
Bottles with a fineness lower than J1RB43 or HB93 should be handled according to the reported degree. 7: Bottle mouth screw inspection
! Inspection content and evaluation method
7.1, 1 Use direct visual inspection with the help of low-power magnification wide visual inspection: only check whether there are cracks, deformation, wear, separation or other mechanical damage. 7.1.2 If the bottle has crack defects, special attention should be paid to the loosening of the screw thread, and be careful not to mix the pre-cracks with the final traces of the cracks (see Figure 1, Figure 2). 7.1.3 It is allowed that the existing product has slight damage that does not affect the use. For high-pressure aluminum plates, it is allowed to have no more than 2 teeth of the gap, and for low-pressure lead bottles, it is allowed to have no more than 3 teeth of the gap. The length of the gap shall not exceed two/three. The depth of the notch shall not exceed 1/3 of the height. 7.2 Group For the slight degree of bottle mouth explosion, please use the H7087 hot-setting screw pin. After modification, it should be inspected in accordance with GB/TA73S. The inspection result should meet the requirements of F3A3359. The unqualified bottle should be scrapped. The specification expansion of the double-effect agent such as the neck crack in Figure 1 should be changed to the width of the light. Figure 2 tapping trace. CB 13077-2004
8 Internal inspection
8.1 Tools
Double-effect in
Figure 3 The part must be
South type
The self-pressure of the plate should not exceed V, and there should be a sufficient safety light source to detect the internal danger of the aluminum bottle. When necessary, the optical internal tax lock or other auxiliary equipment can be used for inspection. 8.2 Internal treatment
Check whether there is grease in the whole device. If there is grease, it must be removed.bzxz.net
8.3 Inspection and evaluation
8.3.1 Pay special attention to the inspection of the bottle shoulder. The bottle opening generally originates from the inner surface of the shoulder, and extends to the bottle mouth thread (see Figure 3. The opening and the lower end of the bottle mouth should be carefully inspected. Be careful not to confuse the cracks with the changes in the bottle.
8.3.2 The inner surface has cracks, cracks, defects, and folds. 8.3.3 There are defects in the bottle bottom and the test warehouse. 9 Weight and residual determination
9.1 Numerical processing
Only the effective group of bottles must be weighed (excluding removable parts and containers) and measured. The weight and weight of the bottle should be expressed in three effective digits. The first digit value should be added for the weight and the second digit should be added for the weight. 9.2 Instrument requirements
The weighing instruments used for weighing and measuring should be kept accurate. The weighing value should be 1.5~3.5 times the commonly used value. The calibration cycle of the weighing instrument shall not exceed two months.
9.3 Measurement and evaluation
9.3.1 For aluminum bottles whose actual measured weight is less than the weight marked on the manufacturing steel stamp, if the actual weight is re-measured, When the difference between the actual measured volume and the manufacturing steel stamp mark is 3% greater than the nominal volume, the minimum wall thickness of the bottle holder should be determined. If the minimum wall thickness is less than the designed volume, the aluminum bottles in the warehouse should be reported as follows: 9.3.2 For the qualified weight measurement, the estimated volume shall be carried out using the method specified in the appendix. 9.3.3 For the bottle holder with the actual measured capacity less than the nominal volume, if the actual measured capacity is greater than the nominal volume less than the old manufacturing steel stamp mark value, the original manufacturing mark volume value must be changed to the actual measured volume value according to the capacity measurement record. Lead bottles with the sum of the measured volume value and the volume marked on the manufacturing steel stamp greater than the volume marked on the manufacturing steel stamp by % should be tested:
10 Water pressure test
19.1 Test requirements
GB13077-2004
10.1.1 The aluminum bottle must be tested for water pressure only. The test equipment, methods and safety measures should comply with the requirements of GB/T0251. 10.1.2 The mispressure time of the aluminum bottle in the test piece J should not be less than 2in. 10.1.3 During the water sheet test, the body of the bottle should be wet and obviously deformed to form a pressure drop phenomenon during the pressure holding period (not the test device or the bottle mouth leakage).
10, 1.4 The residual deformation table of the high-pressure aluminum bottle is measured during the water pressure test. The external measurement method should be used to measure the volume residual deformation rate. When the residual deformation rate exceeds 6%, the minimum wall thickness of the body should be measured. The minimum wall thickness shall not be less than the design wall thickness. The aluminum volume deformation rate exceeds 1% shall be reported. The residual deformation rate of special versions below 4L and 4T. shall not be measured. When measuring the residual deformation rate of aluminum bottles below 161., a test object with a flow rate corresponding to it should be used, and the accuracy of the scale should be improved. 10.2 Treatment of invalid tests
During the hydraulic test of high-pressure cylinders, when the pressure is opened to 91% or above 90% of the test pressure, if the test cannot be continued due to the pressure, the test pressure shall be increased according to the provisions of GB/T3251. The test of the invalid cylinder shall be carried out again. 1f Internal Dry Welding
11.1 Dry Welding Method and Requirements
11.1.1 Aluminum bottles that have passed the permanent pressure test must be internally dried one by one. For bottles with special requirements for the dew point of the filling medium, the filling unit should conduct a steam test at the inspection station, and then make further tests on the aluminum bottles according to the requirements of the lowest point of the filling medium. 11.1.2 After the rack bottle passes the water test, it will be placed down for a period of time to remove the residual water in the bottle. Dry air sweeping, internal equalization, external holding or other appropriate methods can be used for internal drying. 11.1.3 When the internal drying is carried out by heating method, the temperature should be controlled at 50~5℃, and the time should be long enough to ensure that the bottle is completely dried.
11.2 Drying condition inspection
Observe the drying condition of the bottle with the help of a peep hole or a small light bulb. If the inner wall is completely dry, the bottle can be assembled. 12 Bottle adjustment inspection and assembly
12.1 Short network inspection
12.1.1 Only the bottle valve should be inspected and cleaned to ensure that it can be opened and closed freely and does not leak. 12.1.2 The body and other parts shall not be seriously deformed, and there shall be no product damage. The requirements may be in accordance with the provisions of the second paragraph. 12.1.3 When the valve is damaged, it should be replaced with a new one in general. Unless the manufacturer permits, the internal parts can be replaced on behalf of the manufacturer. When changing the cylinder or changing the material, the appropriate cylinder or material must be selected according to the properties of the medium. Before assembling the cylinder, the cylinder valve must be tested for airtightness according to the requirements of GB15382. 12.2 Assembly of the cylinder
The cylinder should be firmly assembled. The number of effective threads and sealing performance of its connection with the service port should be guaranteed. The exposed thread should not be less than 1-2 threads. When installing the valve, pay attention to controlling the torque to avoid damaging the cylinder. The torque should meet the requirements of Appendix B of GT/T11G10-2001. 13 Airtightness test 13.E Test requirements 13.1.1 After the cylinders are qualified in the water pressure test, they must be tested for airtightness. The test equipment and pressure method shall comply with the requirements of R/12137: The test pressure shall be equal to the nominal working pressure of the cylinder 13.1.2 For cylinders containing flammable gas or non-flammable gas, as well as cylinders containing common or mixed gas, the water method shall be used for airtightness test. The cylinders filled with the gas shall be placed in water and the overflow time shall be not less than 2min. During this period, there shall be no leakage. For cylinders containing other gases, the subtraction method may be used for airtightness test. The cylinder shall be kept under pressure for at least 15min. No gas is allowed to remain there for 24 hours. 13.1.3 If the inflation device fails during the inflation process or the cylinder leaks during the test, the test should be stopped immediately. The test should not be repeated until the cylinder is repaired or reassembled.
13.2 Test results
For cylinders that leak under the test pressure, the degree of the leak should be reported. 14.1. Inspection mark
Lead cylinders that have passed the periodic inspection shall be marked with inspection marks or watermarks according to the provisions of the "Gas Cylinder Safety Monitoring Program* Appendix 1", and the inspection color mark shall be printed.
If the qualified large cylinders need to be re-numbered, the surface paint color of the cylinders, the words, the color and the color ring shall comply with the relevant provisions of GB7114: 14.3 Inspection record
The inspector shall send the inspection and assessment results of the periodic inspection and assessment record to the inspection unit 3. 14.4 Destruction of waste bottles
The inspection unit shall be responsible for the destruction of aluminum cylinders according to the provisions of the "Gas Cylinder Reporting Notice" and notify the cylinder ownership unit. G
A.1 Method for measuring the depth of depression
Appendix A
(Informative Appendix:
Measuring method for depression, pit, dent and scratch GB13077-2004
Measure the depth of the plate with the chord of the depression as the reference. The vernier caliper and ruler are used. The ruler should be placed along the axis of measurement. The length of the ruler should be greater than three times the maximum diameter of the depression, as shown in Figure A, a>. Measure the depth with the outer circumference of the bottle body at the depression as the reference. The vernier caliper and ruler are used as the reference. The shape sample is placed around the circumference. The arc length of the sample should be greater than 2/5 of the length of the aluminum plate, as shown in Figure A, 1b). Vernier caliper!
Valve ruler
Bottle body,
Grinding speed,
A.2 The measurement method of the dent, scratch and scratch depth can be one of the following two methods. Figure A1
Standard caliper:
Depth of pits
Front surface of the cup,
4,2,1 The depth of pits, scratches and scratches is the deepest one. The special cross-piece for measurement is shown in Figure A,2. The surface of the plate should match the outer surface of the bottle. The needle of the hand dial is inserted into the dent to measure its depth. The needle should be more than 3, and the half should be ≤0.25mm. It is necessary to regularly compare the readings of the scale to eliminate the error caused by needle tip wear. A2.2 Place the effective hammer through four pits, restore the needle tip, and scratch it. Use a caliper to measure the maximum soft part height, which is the depth of the hole, groove, or scratch.
GB130772004
.Special rain card:
Equally divided in:
External surface:
Figure 4, 2
Note: The concave, concave, and damaged edges can be seen to have a little overlap, so that the engraved sample or the vertical can not be completely fitted with the left side (plate body surface: shell, at this time, the measurement error should be avoided.
Appendix B
(Normative Appendix)
Method for determining the water volume of aluminum bottles
GB13077—2004
The volume determination of aluminum bottles must be carried out after eliminating corrosion and obstructions in the bottle to avoid errors. The measurement method is as follows: B.1 Pour clean water into the test water scoop set in the inspection room and place it at the mouth for 24 h.Ⅱ.2 Place the bottle to be measured upright on the test stand, and draw water from the test bottle end into the bottle. The first large amount of water should be added for 8 hours, and the second large amount of water should be added for 8 hours. The rubber should be used to touch the wall from bottom to top several times, and the water in the bottle should be filled up each time. When the water level at the mouth of the bottle does not drop any more, it is correct. When the air in the bottle is exhausted and the mouth of the bottle does not drop any more, move the bottle to the scale to weigh the total weight of the new water and the water. Subtract the actual measured amount (empty bottle amount) from the "total vertical volume" to get the approximate water content in the bottle, and then multiply it by the number of grams of water in the bottle when weighing (see Table B, 1). The current volume of the bottle can be obtained. Table B1 Volume of each dry gram of water at different water temperatures
1, non c
1. n00 07
1, 00012
1. 00G 19
1. 000 27
1. n00 37
1, f00 48
Ancestor degree/generation
1. 5x.1 n3
1, 5x-1 20
. 0m1 38
Secret magic generation
Body rental/work
1, ca2: 4
1,033 47
1. G03 75
1. c34 cs
1 c4 H5
Group generation
1. Uu4 s7
1, 5x:5 9.
1, 6 3
1,ODF2c34 cs
1 c4 H5
Uu4 s7
1, 5x:5 9.
1, 6 3
1,ODF2c34 cs
1 c4 H5
Uu4 s7
1, 5x:5 9.
1, 6 3
1,ODF2
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.