HG 2468-1993 Technical requirements for stainless steel railway tank cars
Some standard content:
Chemical Industry Standard of the People's Republic of China
HG2468-93
Technical Conditions for Stainless Steel Railway Tank Cars
Published on June 30, 1993
Implemented on January 1, 1994
Published by the Ministry of Chemical Industry of the People's Republic of China Chemical Industry Standard of the People's Republic of China
Technical Conditions for Stainless Steel Railway Tank Cars
1 Subject Content and Scope of Application
HG2468--93
This standard specifies the design, manufacture, testing, inspection and acceptance requirements for stainless steel railway tank cars. This standard applies to stainless steel railway tank cars with chassis (hereinafter referred to as tank cars) with a standard gauge of 1435mm, a maximum operating pressure of 0.2MPa, and a medium temperature not exceeding 40. Mainly used for transportation:. a. Combustible liquids and liquids with low volatility (fish oil, vegetable oil, alcohol, creosote); b. Liquids with high flammability and volatility (benzene, toluene, trimethylbenzene, biphenyl, acetone, methyl acrylate, ethyl acrylate, butyl lactate, ethyl propionate);
c. Acids, alkalis and highly corrosive liquids (palmitic acid, acrylic acid, phthalic anhydride, thorny acid, aluminum hydroxide, ammonium hydroxide, magnesium hydroxide, sodium sulfate);
d. Liquids with explosive potential and high toxicity (acetaldehyde, renonenitrile). For similar media, this standard can be used as a reference. 2 Reference standards
GB1348
GB1591
GB1804
GB2270
GB3323
GB4237
GB4334
GB5117
GB5118
GB5599
GB5600
GB9439
GB11352
JB4708
JJG140
Standard gauge railway locomotive and rolling stock limits
Steel pressure vessels
Carbon structural steel
Stainless steel welding rods
Ductile iron castings
Technical conditions for low alloy structural steel
Tolerances and fitsLimit deviations of dimensions without tolerancesSeamless stainless steel pipes
Radiography and quality grading of steel fusion welded butt jointsHot-rolled stainless steel plates
Test method for intergranular corrosion tendency of stainless steel
Carbon steel welding rods
Low alloy steel welding rods
Specifications for evaluation and test of dynamic performance of railway vehiclesGeneral technical conditions for railway freight cars
General rules for railway vehicle markings
Text and fonts for railway vehicle markings| |tt||Gray iron castings
General engineering castings carbon steel parts
Technical conditions for pressure vessel forgings
Welding procedure assessment for steel pressure vessels
Trial verification procedure for volume of railway tank cars
Approved by the Ministry of Chemical Industry of the People's Republic of China on June 30, 1993 and implemented on January 1, 1994
TB1134
TB1335
TB1467
TB1580
TB1584
TB1586
TB1883
TB1901||t t||3 Design
HG2468—93
Provisions for material selection of steel chemical containers
Technical conditions for wood for trucks
Specifications for strength design and test and appraisal of railway vehiclesGeneral technical conditions for forgings of railway locomotives and rolling stockTechnical conditions for welding of locomotives and rolling stock manufacturing
Technical conditions for riveting of rolling stock manufacturing
Technical conditions for assembly of vehicle coupler and buffer devicesGeneral technical conditions for two-axle bogies of freight cars
Technical conditions for assembly of vehicle brake devices
Tankers shall comply with the provisions of TB1335
Tankers shall comply with the requirements of this standard and product drawings approved in accordance with the prescribed procedures. They shall also comply with the provisions of GB5600. 3.3
The dynamic performance requirements of tank cars shall comply with the provisions of GB5599. The overall dimensions of the tank car shall comply with the provisions of GB146.1. 3.4
The minimum curve radius that the tank car can pass is 145m. 3.5
The structural speed of the tank car shall not be less than 100km/h.
Whether the tank car passes through the hump shall be determined in accordance with the provisions of the "Dangerous Goods Transportation Rules" of the Ministry of Railways and the characteristics of stainless steel and the filling medium.
3.8 Materials
3.8.1 The materials used in the tank car shall comply with the provisions of the relevant standards and have a quality certificate. The materials used to make the tank car barrel and head, manhole pipe, manhole flange and cover, etc. shall be re-inspected when necessary. 3.8.1.1 The steel plate shall comply with the provisions of GB4237. 3.8.1.2 Steel pipes shall comply with the provisions of GB2270, forgings shall comply with the provisions of JB755, HGJ15 Appendix A or TB1467. 3.8.1.3
Welding materials shall comply with the provisions of GB983, GB5117, GB5118. 3.8.1.4
General materials for tank cars shall comply with the following standards. 3.8.2
Ordinary carbon structural steel shall comply with the provisions of GB700. Low alloy structural steel shall comply with the provisions of GB1591. 3.8.22
Carbon steel castings shall comply with the provisions of GB11352. 3.8.2.3
3.8.2.4Gray iron castings shall comply with the provisions of GB9439. 3.8.2.5Nodular iron castings shall comply with the provisions of GB1348. 3.8.2.6 Wooden parts shall comply with the provisions of TB1134 4 Running gear assembly
"Running gear assembly\ is the general term for the chassis, bogie, brake device, coupler, and buffer device. 4.1 General requirements
4.1.1 The joints shall comply with the provisions of TB1584. 4.1.2 Welded parts shall comply with the provisions of TB1580 4.1.3 The limit deviations of the unindicated tolerance dimensions of the machined parts and non-machined parts shall be in accordance with GB1804, JS14 and JS16 accuracy. ||tt| |4.1.4Except as noted in the drawings, the assembly dimension tolerances are manufactured according to the standard tolerance JS16 grade precision in GB1804.2
HG2468-93
4.1.5The length of all bolts exposed from the nuts after assembly shall not be less than one pitch at the shortest and not more than one nut thickness at the longest. 4.1.6The split pins at the upper and lower ends of the handbrake shaft shall be rolled on the shaft, and the split angle of the split pins at other parts shall not be less than 60" after installation. 4.1.7Except as specified, the rotating and sliding surfaces shall be coated with suitable lubricating grease. 4.2 Base frame
4.2.1 After the base frame is assembled, the maximum deviation of the length is ±0.8% of its basic size, the width deviation is ±5mm, and the difference between the diagonals is not more than 8mm.
4.2.2 After the base frame is assembled, the maximum deviation of the distance between the center lines of the two sleeper beams (measured from the beams on both sides) is ±0.7% of its basic size, and the difference between the diagonals is not more than 6mm.
4.2.3 Between the two sleeper beams, the deflection of the middle beam should be 0.12mm, the lateral bending of the middle beam should not be more than ±0.6% of its basic size, and the length per meter should not be more than 3mm. The warping or sagging of the lower side beams other than the traction beam and the pillow beam shall not exceed: 5mm, and the traction beam shall not swing more than 5mm. 4.2.4 The offset of the center of the upper center plate to the outer side of the two side beams shall not exceed 3mm, and the maximum deviation of the distance from the center of the upper center plate to the outer side of the end dye is ±5mm.
4.2.5 After the saddle and the chassis are assembled, the offset of the center line of the saddle shall not exceed 2mm in any direction. 4.2.6 The offset of the center line of the lower saddle and the center line of the two side beams shall not exceed 2mm in any direction. 4.2.7 After the chassis is assembled, it should be placed on the platform and a 0.5mm feeler gauge should be used to check the close contact between the two sides of the upper center plate and the platform. The insertion depth of the feeler gauge shall not exceed 20mm.
4.3 Bogie
The assembly of the bogie shall comply with the provisions of TB1883. 4.4 Braking device
The assembly and test of the braking device shall comply with the provisions of TB1901. 4.5 Coupler buffer device
The assembly of the coupler buffer device shall comply with the provisions of TB1586. 4.6 The running device assembly shall have a technical history chain, 5 body manufacturing, assembly
5.1 Hot and cold processing
5.1.1 The main components of the tank body (shell, head, manhole cover, manhole flange, manhole pipe, manhole bolt, etc.) shall be marked with material transplantation and have a transplantation record.
5.1.2 The cutting of steel plates and the bevel of the weld shall be machined. If plasma cutting is used, the slag and oxide on the cut surface shall be cleaned, and the surface of the bevel shall not have defects such as cracks, delamination, slag inclusion, etc. 5.1.3 Head
5.1.3.1 When the head is made of two or three symmetrical steel plates, the distance between the weld and the center line of the head should be less than 1/4D (D is the designed inner diameter), and the width of the middle plate should not be less than 200mm (Figure 1). HG2468-93
5.1.3.2 The misalignment of the weld of the head, b, when the plate thickness is 6<12, b<1/48, when the plate thickness is 12mm, b<3mm (Figure 3),
5.1.3.3 The head should be formed as a whole, and the surface should be smooth and flat. The minimum thickness of the head after stamping shall not be less than the nominal thickness 8, minus the negative deviation of the steel plate thickness C
5.1.3.4 Use an inner sample with a chord length not less than 3/4D of the head to check the shape deviation of the inner surface of the head (Figure 2). The maximum gap shall not be greater than 1.25% of D, and the depth of the longitudinal wrinkles of the straight edge part shall not be greater than 1.5mm. The inspection shall make the sample plate perpendicular to the measuring surface, and the weld part shall be avoided. 5.1.3.5 The difference between the maximum diameter Dm and the minimum diameter Dmlm on the straight side section of the head shall not be greater than 1% of D and not greater than 25mm (Figure 2).
5.1.4 Cylinder section
5.1.4.1 The classification of welds shall comply with the provisions of GB150. The misalignment of the weld joints of Class A, b, when <12mm, b<1/45mm (Figure 3), when >12mm, b<3mm.
≥3/4Di
HG2468-93
5.1.4.2 The edge angle E formed by Class A welds is <10%§+2mm and not greater than 5mm. It shall be inspected with an inner or outer sample plate with a chord length equal to 1/6D and not less than 350mm (Figure 4). 1/bDi and not less than 350
1/bDi and not less than 350
5.1.4.3 The difference between the maximum diameter and the minimum diameter on the same section is not greater than 0.8%D, and not greater than 24mm (Figure 5) Note: Measure the plate at a position 100mm outside the edge of the reinforcement ring Figure 5
5.1.5 Cylinder assembly
5.1.5.1 The misalignment b of Class B welds, when 8<20mm, b<1/48: when 8>20mm, b<5mm (Figure 6). A
5.1.5.2 The angle formed by the B-type weld is E<10%gg+2mm, and not more than 5mm, and is checked with a ruler not less than 300mm in length (Figure 7).
HG2468-93
5.1.5.3 The straightness of the cylinder body is AL<2H/1000, and not more than 20mm. 5.1.5.4 The length limit deviation of the cylinder body with a total length of .8~10m (including 10m) is ±1.4% of the basic size. When the length of the tank body is greater than 10m, the length limit deviation is ±1.3% of the basic size. 5.1.5.s The shortest cylinder section length is not less than 500mm. 5.1.5.6 Cross welds are not allowed. The staggered gap between the longitudinal welds of two adjacent sections or the end of the head weld and the longitudinal welds of the adjacent cylinder section should be greater than 100mm.
5.1.6 The welds of the catalytic body should be kept away from the saddle, the upper saddle and its connecting accessories as far as possible. When it is necessary to cover, the welds covered should be polished flush with the parent material and passed 100% X-ray or ultrasonic inspection. 5.2 Welding
5.2.1 The tank body welding must be undertaken by welders holding valid welder certificates of the corresponding category issued by the labor department. 5.2.2 The welding process assessment before welding should be carried out in accordance with the provisions of JB4708. The welding procedure of the welded parts shall be formulated according to the technical requirements of the drawings and the qualified welding procedures. 5.2.3
When the temperature of the welded parts is lower than 0℃, it shall be preheated to about 15℃ within 100mm of the starting welding point. 5.2.4
After welding, the welder code shall be recorded and confirmed in a schematic diagram for reference. 5.2.5
5.2.6 The residual height of the welded parts A and B types shall be 0~2.5mm for manual welding and 0~4mm for automatic welding. The weld shall be smooth and no edges or corners are allowed.
The weld and heat-affected zone shall not have defects such as cracks, pores, arc pits, slag inclusions, etc. 5.2.7
The weld shall not have undercuts.
The fillet weld and the parent material should have a smooth transition.
5.2.10 The friction thinning after grinding the weld surface to eliminate defects or mechanical damage should not exceed the negative deviation of the steel plate thickness. 5.2.11 The slag of the weld and the splash metal on both sides should be cleaned. 5.2.12 When the weld needs to be repaired, the repair measures should be agreed by the welding technicians. The number of repairs of the same part of the weld should generally not exceed two times.
5.2.13 For welds that are still unqualified after two repairs, the repair plan must be approved by the factory's chief technical person in charge when repairing again. After the repair, the number of repairs, parts and repair conditions should be recorded in the quality certificate. 6 Inspection and testing
6.1 Welding test plate
6.1.1 Product welding test plates should be prepared for each vehicle. 6.1.2 The preparation of product welding test plates shall meet the following requirements: 6.1.2.1 The test plate plate shall have the same brand, specification and delivery status as the body material. 6.1.2.2 The test plate shall be welded by the welder who welds the chain body, using the same conditions and welding process as the tank body. For the chain body welded by multiple welders, the welder who welds the test plate shall be designated by the inspection department, and the welder's stamp shall be stamped on the test plate. 6.1.2.3 The longitudinal weld test plate must be welded at the extension of the longitudinal weld of the section at the same time as the section. 6.1.2.4 The weld of the test plate shall be qualified after 100% flaw detection. HG2468--93
6.1.2.5 The welds shall be tested for intergranular corrosion in accordance with GB4334. 6.1.2.6 The dimensions of the test plate, sample cutting, inspection items, test methods, qualified indicators and re-inspection shall all be in accordance with the provisions of Appendix G of GB150.
6.2 Nondestructive testing
6.2.1 The chain body nondestructive testing must be performed by personnel holding the corresponding method nondestructive testing personnel qualification certificate issued by the labor department. 6.2.2 The inspection length of the tank body A and B welds shall not be less than 20% of the length of each seam and shall not be less than 250mm. The flaw detection inspection shall give priority to the T-joint.
6.2.3 The radiographic flaw detection of the welds shall be carried out in accordance with GB3323. The quality requirements of radiography shall not be lower than AB level, and the inspection result level shall be qualified.
6.2.4 After flaw detection, if there are defects exceeding the standard, the inspector shall specify that the flaw detection length be increased by 10% (corresponding to the total length of the weld) at the extension of the two ends of the defect. If it is still unqualified, all welds of the tank body shall be 100% flaw detected. 6.2.5 For C and D type welds of tank trucks with a pressure greater than 0.1MPa, penetrant flaw detection shall be carried out. 6.2.6 Penetrant flaw detection shall be carried out in accordance with Appendix H of GB150, and no cracks or delamination are allowed. 6.2.7 The flaw detection of the tank body shall be marked, and the flaw detection situation shall be recorded in detail. 6.3 Strength and airtightness test
6.3.1 The water pressure strength test can be carried out only after the tank body has passed the flaw detection. 6.3.2 The water pressure strength test of the tank body is carried out at a pressure of 0.4MPa. During the test, an exhaust port shall be set at the top of the tank: the air in the tank shall be exhausted when filling with water. The outer surface of the tank should be kept dry. Two calibrated pressure gauges with the same range must be used for the pressure test. The range of the pressure gauge is about twice the test pressure (not less than 1.5 times and not more than 4 times the test pressure). The test water temperature is not less than 5°C. When increasing the pressure, the pressure should rise slowly. After reaching the test pressure, the pressure holding time should not be less than 30 minutes. Then the pressure should be reduced to 30% of the test pressure and kept for a long enough time. All welds and joints should be checked. If there is leakage, repair it and retest it. 6.3.3 For the tank body with a jacket, the jacket can be welded only after the tank body passes the pressure test, and then the hydraulic pressure test inside the jacket can be carried out. 6.3.4 The water pressure test should control the nitrogen ion content of water not to exceed 25ppm. 6.3.5 Various accessories on the tank body such as safety valves, pressure gauges, valves, etc. should have certificates of conformity and be subject to performance tests before assembly. They can only be installed after passing the tests.
6.3.6 Air tightness test of the tank
The tank body is tested for air tightness at the highest operating pressure. 7 Completion
7.1 Tank completion requirements
7.1.1 The longitudinal offset between the center line of the tank body and the center line of the base frame shall not exceed 15mm (see Figure 8). HG2468—93
7.1.2 The displacement of the longitudinal and transverse centerline of the saddle on the tank body relative to the longitudinal and transverse centerline of the tank body shall not exceed 2mm. 7.1.3 The deflection of the bottom of the tank body shall be 0~12mm downward. 7.1.4 After the chain body is completed, the contact degree between the tank body and the saddle pads shall meet the following requirements. If it cannot be achieved, it is allowed to be adjusted by grinding pads. One-third of the area of the pads must be close to the tank body, and the remaining local gaps shall not exceed 1mm, and individual gaps shall not exceed 2mm. The thickness of the pads shall be within the range of 52~72mm, and the pads shall be 5mm higher than the edge of the longitudinal bracket. 7.1.5 The contact surface between the upper saddle and the lower saddle should be close after the bolts are tightened. Check with a 0.3mm feeler gauge and do not touch the bolt rod. 7.1.6 After the cassette adjuster is tightened, the cassette and the tank body should be close, and the local gap should not exceed 1mm, the length should not exceed 100mm, and each cassette should not exceed 3 places
7.1.7 When the connection between the medullary body and the chassis is welded, the contact between the tank body and the chassis should be close, and the local gap at the welding point should not exceed 2mm.
7.2 Tank car completion requirements
7.2.1 The centerline height of the coupler is 880±10mm, and the height difference between the 1st and 2nd couplers of the same car is not more than 10mm. 7.2.2 The sum of the left and right side bearing clearances of the same bogie should be between 10~16mm, and each side should not be less than 4mm. If it exceeds the limit, it is allowed to adjust the lower side bearing with a pad, and the total thickness of the pad shall not exceed 16mm. 7.2.3 The centerline offset of the upper and lower side bearings shall not exceed 6mm in the horizontal direction and 8mm in the vertical direction. 7.2.4 The height deviation of the upper plane of the same end beam of the chassis from the rail surface shall not exceed 12mm. 7.2.5 After the tank car is completed, the car body shall be stable. When the inspector naturally climbs up to the 1st or 4th foot, the car body shall not move. 8 Volume verification
8.1 After the tank car passes the inspection, the volume verification shall be carried out. 8.2 The volume verification of the tank car body shall be carried out in accordance with JJG140. The volume table number shall be painted on the specified position. 9 Paint
9.1 The painting of the tank truck chassis shall comply with the relevant standards and drawings. 9.2 After all carbon steel parts are painted with primer, the support, pad, platform, frame and railing shall be painted with two coats of black mixed paint, and the cassette shall be painted with two coats of silver-gray paint.
10 Marking
In addition to complying with the provisions of GB7703.1 and GB7703.2, the marking of the tank truck shall also comply with the following provisions: 10.1 On the outer surface of the tank truck, a color strip with a width of 200mm shall be painted around the horizontal center line of the tank body (according to the drawing). HG2468-93
10.2 Various markings shall be sprayed on both sides of the tank truck according to the following requirements (the marking traces are arranged from left to right), and the markings shall be beautiful, neat and clear
The tank truck number, the unit to which the tank truck belongs and the destination address shall be sprayed on the side of the chain body in 200 font. The name of the transport medium and the technical performance of the tank truck are sprayed on the right side of the tank body. 10.2.2
The name of the medium, the font is 150 font;
b. The technical performance of the tank truck is sprayed below the name of the medium; load
capacity meter;
1 (accurate to one decimal place);
m (accurate to one decimal place);
convert to long (accurate to one decimal place);
hump mark is prohibited.
The font is 70 font, the unit of measurement and one decimal place are in 50 font. 10.2.3 The name of the manufacturer is sprayed below the center of the tank body, the font is 150 font. 10.2.4 The above-mentioned characters shall be in black.
11 Tank truck nameplate
The tank truck nameplate shall be installed in a conspicuous position of the tank truck. The size of the nameplate shall not be less than 200mm×160mm. The contents of the nameplate shall include:
the model of the tank truck;
b. the filling medium;
c. Load 1 (refers to the maximum load of the medium, accurate to one decimal place); Volume m (refers to the design volume, accurate to one decimal place); d.
Working pressure MPa:
Factory number;
Factory date;
Manufacturer name.
Technical conditions for tank trucks leaving the factory
When the tank truck leaves the factory, each tank truck should provide a technical resume, and the chain truck should have the following technical documents when leaving the factory:
Product quality certificate (including product certificate); b. Product instruction manual:
General drawing of the tank truck.
Additional notes:
This standard is proposed by China National Chemical Equipment Corporation and is under the jurisdiction of the Chemical Machinery Research Institute of the Ministry of Chemical Industry. This standard was drafted by the Mechanical Research Institute of Jilin Chemical Industry Corporation. The main drafters of this standard are Zhang Liying, Cheng Xiaogu, Lu Tinghan, Qi Mengxue, People's Republic of China
Chemical Industry Standard
Technical Conditions for Stainless Steel Railway Chain Cars
HG2468-93
Editor China Chemical Equipment CorporationbzxZ.net
Postal Code 100011
Printed by Beijing Institute of Chemical Technology Printing Factory
Copyright reserved
880×12301/16
First Edition June 1994
No Reprinting
Printing Sheet 0.50
12,000 Words
First Printing June 1994
Additional Notes:
This standard was proposed by China National Chemical Equipment Corporation and is under the jurisdiction of the Chemical Machinery Research Institute of the Ministry of Chemical Industry. This standard was drafted by the Machinery Research Institute of Jilin Chemical Industry Corporation. The main drafters of this standard are: Zhang Liying, Cheng Xiaogu, Lu Tinghan, Qi Mengxue, People's Republic of China
Chemical Industry Standard
Technical Conditions for Stainless Steel Railway Chain Cars
HG2468-93
Editor China National Chemical Equipment Corporation
Postal Code 100011
Printed by Beijing Institute of Chemical Technology Printing Factory
Copyright reserved
880×12301/16
First Edition June 1994
No Reprinting
Print Sheet 0.50
12,000 Words
First Printing June 1994
Additional Notes:
This standard was proposed by China National Chemical Equipment Corporation and is under the jurisdiction of the Chemical Machinery Research Institute of the Ministry of Chemical Industry. This standard was drafted by the Machinery Research Institute of Jilin Chemical Industry Corporation. The main drafters of this standard are: Zhang Liying, Cheng Xiaogu, Lu Tinghan, Qi Mengxue, People's Republic of China
Chemical Industry Standard
Technical Conditions for Stainless Steel Railway Chain Cars
HG2468-93
Editor China National Chemical Equipment Corporation
Postal Code 100011
Printed by Beijing Institute of Chemical Technology Printing Factory
Copyright reserved
880×12301/16
First Edition June 1994
No Reprinting
Print Sheet 0.50
12,000 Words
First Printing June 1994
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