HG/T 2475-1993 Quality classification of liquefied gas railway tank cars HG/T2475-1993 standard download decompression password: www.bzxz.net

Chemical Industry Standard of the People's Republic of China
HG/T 2475 -.: $3
Quality classification rules for liquefied gas railway tank cars
1993-— 06— 30 Issued
Ministry of Chemical Industry of the People's Republic of China
Implementation on 199401—01
Chemical Industry Standard of the People's Republic of China
Quality classification rules for liquefied gas railway tank cars Subject content and scope of application
This standard mainly stipulates the quality classification rules for liquefied gas railway tank cars. HG/T2475 -- 93
This standard is applicable to the quality inspection and grade assessment of railway tank cars (hereinafter referred to as railway tank cars) with a volume greater than 30m3 and a design pressure of 0.8~2.2MPa (8~～22kgf/cm\) that transport liquid nitrogen, liquid chlorine, liquid sulfur dioxide and liquefied petroleum gas (propylene, propane, butadiene, butane and their mixtures).
2 Reference standards and technical documents
GB150 Steel pressure vessels
GB10478 Technical conditions for liquefied gas railway tank cars JB4708 Welding process assessment for steel pressure vessels HG/T2388 General rules for quality grading of steel welded pressure vessels 3 Basic requirements for product quality grading
3.1 This standard is the basis for quality inspection by enterprise quality inspection departments, and can also be used by national and departmental quality supervision and inspection agencies for product quality supervision and random inspection or quality inspection.
3.2 The classification and level of product quality characteristics shall comply with the provisions of Chapter 4 of HG/T2388. 3.3 The product quality grade assessment shall comply with the provisions of Chapter 5 of HG/T2388. 3.4 When conducting quality inspection on products, the inspected party shall submit relevant information of the inspected products and provide all technical documents and quality management documents of the selected products according to the requirements of the inspecting party. 3.5 If parts and components can be made on the products, the inspection shall be carried out on the products to be inspected. Otherwise, parts and components equivalent to the number of products to be inspected shall be taken from the products for inspection.
4 Product inspection details
4.1 The material part shall comply with the provisions of Table 1. 4.2 The welding part shall comply with the provisions of Table 2. 4.3 The assembly and processing part shall comply with the provisions of Table 3. 4.4 The underframe and tank body shall comply with the provisions of Table 4. 4.5 The performance test and safety accessories part shall comply with the provisions of Table 5. The paint, packaging and factory documents part shall comply with the provisions of Table 6. 4.6
Approved by the Ministry of Chemical Industry of the People's Republic of China on June 30, 1993, and implemented on January 1, 1994
Quality and characteristics
Name
Manhole neck
1.4 Manhole flange
1.5 Manhole flange
1.6 Reinforcement plate
1.7 Manhole bolt
1.8 Welding material
(welding rod, welding wire, flux)
Quality characteristics
Classification
2475 - 93
Quality characteristics
(1) Meet B grade
(2) Before feeding, visual inspection should be carried out
, and non-photographic inspection should be carried out if necessary, and corresponding records and reports should be made
(1) Meet C grade
(2) There is a purchase statement
(1) Meet E grade requirements
(2) There is a purchase instruction
(1) The material t contains
substitute) in accordance with the drawing
sample, GB150 and the requirements of safety technical supervision of pressure vessels (hereinafter referred to as "pressure vessel regulations") (2) acceptance and re-inspection shall be carried out in accordance with the requirements of the "set regulations", and its control certificate (including marking) shall be traceable (1) in accordance with the welding process and relevant standards (2) in accordance with the "set regulations" Requirement for control. Documents should be traceable. Inspection method. Verification of physical objects and documents. Assessment results. Qualification level. Quality characteristics. Name of welder qualification. 2.1 Welder qualification. 2.2 Welding process. 2.3 Product welding. 2.4 Internal structure of weld. 2. 5A, B type welding
chain residual height e
2.6A, Japanese type welding
warp width
quality category
2475 -93
Table 2 welding
quality characteristic index
All welding of pressure components must be performed by welders holding valid certificates issued by the labor department of the corresponding country, with complete welding process assessment and special compliance with JB4708 The regulations of B150 shall be in accordance with the provisions of Article 10.5. Its control certificate shall be complete and traceable. (1) Meet the requirements of Class B <1) Meet Class C. (1) Non-destructive detection. (2) The same part shall be reviewed and the results shall meet the requirements no more than once. Inspection method. Check the welder's file certificate and the physical object. Check the voucher. Check the voucher. Verify the original flaw detection material. (2) The same part shall be reviewed and the film shall be taken out according to GB150 and the corresponding requirements. (3) 100% X-ray inspection shall be conducted no more than twice. Grade 1 film rate (by film
(3) 100% ray
(2) the same part returns
count) is not less than 85% of the flaw detection 1st grade film rate repair according to GB150 standard local ray flaw detection!
(by film number) is not [symptom
Grade film rate (by film number less than 80%
local ray flaw detection
needle is not less than 85%
(4) One-time flaw detection inspection 1st grade film rate (by film qualified rate (by film number) is not less than
count is not less than 94%
(t) reaches b Grade requirements
(4) One-time flaw detection pass rate (counted by number of pieces not less than
Conform to GB10478 weld measuring instrument
(1) Reach suspected
(2) At the same time meet the following:
requirements,
Plate thickness 8
12<6250~2
(1) The weld width is not greater than the outer edge width of the groove
(2) The same weld width:||t t||The tension is not greater than 3
(2)The excess height of the same welding chain is not greater than e/2
(1)The width of the weld is not greater than the width of the outer edge of the groove plus 8
(2)The width difference of the same weld is not greater than
(3)The width difference of the same type of weld is not greater than
(3)The width difference of the same type of weld is not greater than 8
and the width difference of the same type of weld is not greater than 5
Assessment results
Grade standard
Quality Characteristic
Name
2.7C, D type weld
Quality
2.8 Weld appearance
2.9 Weld undercut
2.1d Non-photographic flaw detection
Marking documents
2.11 Post-weld heat treatment
2.14 Welding records
2.13 Welder’s stamp
Quality characteristic
Characteristic category
HG/T2475—93
Continued table? bzxz.net
Quality characteristic index
Inspection method
(1) Meet the requirements of grade b (1) Meet the requirements of grade c (1) Check the original voucher according to the design requirements [c2) When the size of the weld foot is small, perform silver-free detection,
is less than or equal to 8, its positive deviation is 3, and its negative deviation is 1: when the size of the weld foot is large, its positive deviation is 3,
is greater than 8 and less than 12, its negative deviation is 1.5, its positive deviation is 4,
When the size of the weld foot is large,
Special measuring tool
2) When the size of the weld foot is small,
is less than or equal to 8,
its positive deviation is 3,
's negative deviation is 1; when the welding foot
is greater than or equal to 8 and less than 12,
's negative deviation is 21. When the
foot size is greater than or equal to
12, its positive deviation is 4, and the negative deviation
is less than 12,
4, and the negative deviation is 1. 6
is 1. 6; when the welding foot
's positive deviation is 4, and
's negative deviation is 21. When the
size is greater than or equal to
12, its positive deviation is 3
's foot size is greater than
's difference is 4, and the negative deviation is equal to 12 When the positive deviation is 4 and the negative deviation is 3 (1) the weld surface shall meet the requirements of level b. There shall be no cracks, pores, (2) the weld surface shall not have defects such as bare arc pits and slag inclusions, and shall not have grooves, heavy eggs, protrusions and depressions containing molten and spatter. The weld is not allowed to have undercuts in accordance with the drawings and the provisions of GB10478. (1) The non-destructive testing certificate shall comply with the process standards. (2) There is a non-destructive testing mark part map. (3) The marking is clear and the part is accurate. Verification and exemption of certificate. (1) There is a heat treatment process specification in accordance with the drawing (including heat treatment verification process temperature, holding time, heating and cooling speed, workpiece temperature difference, furnace temperature, installation position and number of thermocouples) (2) There is a temperature control automatic that meets the process specifications. The dynamic measurement record report complies with the requirements of the welding process specification and is complete and accurate. Standardized records and reports. Verification records. (1) The welder's stamp of the weld of the main pressure-bearing components of the container is checked. (2) The stamp is clear and the part meets the process requirements (when the national sample or process regulations do not allow stamping, there should be traceable voucher information). Inspection. Evaluation results. Grade level. 3.5 Tolerance of sinking 3.6 Shell thickness Dimensions of supports and internal parts in inches and cm Total length of equipment body Surface quality 3.2 Straightness of body 3.3 Seam HG/T 2475 -- 03
Table 3 Assembly and processing
Quality characteristic index
Comply with the requirements of the drawing and GB10478
(1) Meet the requirements of 6 oxygen
(2) Class A welds do not require openings
Board quality
Comply with the requirements of the drawing and GB10478
1/88.—2
-1 ≤1/86 -
1/8%—1
≤1/168≤1/88
≤1/86
and not less than and not greater than
and not greater than and not greater than
and not greater than and not greater than
Less than or equal to D. 106% +1 and not greater than 418
Less than or equal to 0. 106 +
1. 5 and not more than 4. 5
Not less than nominal thickness minus negative volume difference C1 of steel plate(1)Meet Grade 6 requirements
（2）Dimensional tolerance is not more than 80% of the value specified in the corresponding standard
Conform to the requirements of the sample and the corresponding standard
Meet the requirements of Grade 4, surface damage should be polished
and smooth
Less than or equal to 0. 103 + 2
and not more than 5
Azimuth dimensions conform to the tolerance of the sample conform to the requirements of the corresponding standard conform to GB10478 Requirements
Copper tape measure
Thickness gauge
Inspection ruler
Raising ruler
Thickness gauge
Evaluation result
Grade
Quality characteristics
Name
3.10 Head forming
3.11 Pipe flange
Assembly shape and position
3.12 Sealing surface quality
3.2 Position
and size
3.14 Equipment body
Total length tolerance
Quality characteristics category
|HG/T2475-3
Continued Table 3
Quality plate characteristic index
(1) According to GB150
, it complies with the drawings and the provisions of Article 10.2.
and Article 10.2.2.3 of GB150. The maximum gap is not greater than
(2) The wrinkle depth is not
greater than 1, and there is no tension
, which complies with the drawings and the provisions of Article 10.2.3.7 of GB150. It complies with the drawings and has no
scars, and effective protection measures are taken
There is no
diameter penetration damage
and||protective measures are taken
conform to the drawing. There is no
diameter penetration damage
and||protective measures are taken
the measured values ​​of the azimuth dimensions are within the tolerance range of the drawing and GB10478
Inspection method
Special sample
Caliper and measuring tape
Surface roughness
Comparison sample
Copper measuring tape
Special measuring tape
Steel measuring tape
Determination result
Quality characteristic name
Car frame
4.2 Coupler center
4.3 Bogie side
clearance
4.4 Upper and lower side
center offset
4.5 Height difference between the same end beam and the rail surface
4.6 Car body level after tank body completion
4.7 Contact clearance between shoe seat pad
and tank body
4.8 Clearance between tension belt and
groove
4.9 Maximum liquid level
pipe height
4. General loading and unloading and
tank bottom
quality to be
category
2475-93
Table 4 Car frame and tank completion
quality characteristic index
Conform to the drawing and GB10478 requirements
880±10mm; interval--the height difference between the 1st and 2nd car hooks is not more than 10mml
C+C:=10~16
and c,4
the vertical direction is not more than 6, the vertical direction is not more than 8
the inspector naturally climbs up to 1st or 4th When the foot is in position, the vehicle body shall not shake. The length of the contact surface is allowed to be less than 0.5, the local clearance shall not exceed 1, and the local clearance shall not exceed 1. The length shall not be greater than 100. The tolerance is +3. 5
Tolerance +3
Tolerance +4
Tolerance +5
Inspection method
Check the exhibition calendar or
Test record
Check the inspection record
Check the inspection record
Check the inspection record
Check the inspection record
Set of inspection records
Steel ruler
Evaluation result
Qualified
Grade
Quality characteristic
Name
4.11 Hydraulic pipeline
System assembly
4. 124 Hydraulic pipeline
System pressure test
4.13 Intermediate bracket
Connecting bolts
Tightening condition
4.14 Appearance assembly
4.15 Tank car marking
4.16 End body and bottom frame longitudinal deviation
Quality category
Conform to drawing
HG/T2475-93
Continued Table 4
Quantitative characteristic index
(1) Bolts are not loose
(2) Check between the intermediate bracket and the inclined plate of the bottom frame with a 0.5 feeler gauge. The bolts should not be touched.The gap of the rest of the parts is not more than 1
Conform to the drawing and GB1048
Conform to the drawing, the handwriting is clear
Not more than 15mm
Inspection method
Inspection record
Inspection record
Use the sample to measure the center line of the tank body and the center line of the bottom frame in the center
simple bracket circle
Evaluation results
Grade
Quality
Product name
5. 1 Strength test
5.2 Air tightness
5.3 Purchased safety
Accessories and main
Main accessories
5.4 Self-made safety
Accessories and main
Main accessories
5.5 Melting temperature of fusible materials
Quality category
HG/T2475-03
Performance test and accessories
Quality characteristics
(1) Reaching grade
(2) Without trimming
First test life
(1) Reaching grade b||tt ||(2)Re-inspection
Comply with the drawings and the provisions of GB10478
(1)Achieve e-level
With complete quality
(2)With procurement statement
Qualification certificate
With complete design, test data and qualification certificate70±5℃
Inspection method
Verification certificate
Verification voucher
Verification voucher
Check test report
Or re-inspect
Note: Purchased and self-made accessories must include pressure gauge, liquid level gauge, hand pump, shut-off valve and safety valve. Table 6 Paint, packaging and factory technical documents
Quality description
6.1 Container interior
Cleanliness level
6.2 Anti-rust paint
6.3 Packaging nameplate
6.4 Factory documents
Quality description
Quality category
Quality description index
Conforms to the drawing and the provisions of GB150, no stagnant water or residual debrisConforms to the drawing and the provisions of GB150 and GB10478, the paint surface is smooth, the color is uniform and beautiful
Conforms to the drawing Sample, GB150 and "containment specification\ and GH10478 comply with the provisions of GB10478
Inspection method
Inspection of physical objects
Inspection data
Evaluation results
Evaluation results
Excellent one and two
Product quality inspection summary table
HG/T2475--3
The product quality inspection summary table should be filled in Table 7 and should comply with the provisions of Article B3.5 of HG/T2388. Table of product quality inspection summary table
Quality sustainability||tt| |Number of items to be inspected
Number of items actually inspected
Product quality grade assessment
Among the items actually inspected
Excellent grade - grade
Qualified grade
Unqualified
Product number:
Grade item rate
Excellent grade +- grade
Qualified grade
Use the data in Table 7 to compare with Table 3 in HG/T2388 to assess the product quality grade and fill in Table 8. The format should comply with the regulations of HG/T2388. Table 8 Product quality grade assessment results
Manufacturer name
Product Name
Product model
Product general number
Completion date
Quality of this product
Grade assessment
Year, month, day
Product drawing number
Factory number
Additional instructions:
This standard is proposed by China National Chemical Equipment Corporation. HG/r
247593
This standard is under the jurisdiction and interpretation of the Chemical Machinery Research Institute of the Ministry of Chemical Industry and the China Chemical Equipment Association. This standard was drafted by Jinxi Chemical Machinery Factory, and the main drafter of this standard is Guo Chengchun.
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