HG/T 2388-1992 General rules for quality classification of steel welded pressure vessels
Some standard content:
Chemical Industry Standard of the People's Republic of China
Quality of Steel Welded Pressure Vessels
General Rules for Quality Grading
Published on 199209-15
Ministry of Chemical Industry of the People's Republic of China
Standards for Quality Grading of Steel Welded Pressure Vessels2388-92
Implementation on 1993-07-01
Chemical Industry Standard of the People's Republic of China
General Rules for Quality Grading of Steel Welded Pressure VesselsSubject Content and Scope of Application
HG/T2388-92
This standard specifies the quality grading method of steel welded pressure vessels and the general requirements for the preparation of detailed rules for quality grading of pressure vessel products. This standard applies to steel welded pressure vessels (hereinafter referred to as vessels) with a design pressure not exceeding 35MPa. 2 Reference standards
JB4708
Terms and terms
Guidelines for standardization work Basic provisions for standard compilation Guidelines for standardization work Standards for publication and printing Steel pressure vessels
Welding process assessment for steel pressure vessels
3.1 Quality characteristics: Qualitative or quantitative representation and provisions that specifically reflect the applicability factors of products or parts. 3.2 Classification of quality characteristics: Categories divided according to the degree of influence (importance) of quality characteristics on product applicability. 3.3 Grading of quality characteristics: The levels of quality characteristics divided according to the level achieved by their indicators. 3.4 Product quality grade: The grade of the product comprehensively evaluated according to the level of its quality characteristics. 4 Classification and grading of quality characteristics
4.1 Quality characteristics are divided into three categories according to the principles of Table 1: key quality characteristics (Class A), main quality characteristics (Class B) and general quality characteristics (Class C).
Quality characteristic category
Classification reason
Quality characteristics that directly affect the safety of container use, seriously affect the performance and life of the container
Quality characteristics that affect the safety, performance and life of the container are not key or main quality characteristics
Degree of influence
Category code
4.2 Key and main quality characteristics (Class A and Class B are divided into three levels: excellent, first level and qualified level according to the level achieved by their specified indicators. General quality characteristics (Class C) are not graded. The classification of levels shall comply with the provisions of Table 2 and Table 2
Quality characteristic level
Qualified level
Indicators meet international advanced standards and reach the advanced level of similar foreign products in the past five years. Indicators meet international general technical standards and reach the general level of similar international products. Indicators meet my country's general Yongping standards (national, industry, local or enterprise standards). Approved by the Ministry of Chemical Industry of the People's Republic of China on September 15, 1992
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1993-07-01 implementation
HG/T2388-92
4.3 The quality characteristics of container products and the specific provisions of their classification and grading are shown in Appendix A (Supplement). 5 Product quality grade assessment
5.1 The quality of container products is divided into three grades: superior products, first-class products and qualified products. The grade assessment should be carried out according to the product quality grading rules, and the project rate of each level of various quality characteristics is calculated from the inspection results, and the quality grade of the product is determined by comparing with Table 3. The rate of each level of items is calculated according to formula (1), (2) and (3):
a% (rate of excellent items) =
number of quality characteristics of this category reaching the excellent level × 100%. ...Total number of items in this category
number of quality characteristics of this category reaching the first level
6% (rate of first-level items) =
total number of items in this category
c% (rate of qualified items) =
number of quality characteristics of this category reaching the qualified level × 100%total number of items in this category
For the general requirements of the quality classification rules for container products, please refer to Appendix B (Supplement). Table 3
Qualified products
Superior products
Cumulative 100
Cumulative 100
Cumulative not less than 85
Not less than 85
Cumulative 100
In order to make the physical quality level of the product reach the corresponding grade requirements, the enterprise should have the quality assurance capability to produce products of corresponding grades. 2
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Appendix A
Basic provisions for classification and grading of container product quality characteristics (supplement)
This appendix stipulates the quality characteristics of container products and their classification, grading requirements and inspection methods. The quality characteristics not included shall comply with the requirements of the corresponding standards and drawings. The outsourced and purchased pressure-bearing components shall comply with the requirements of the corresponding quality characteristics in this appendix. The AI material part shall comply with the provisions of Table A1. The A2 welding part shall comply with the provisions of Table A2. A3 The assembly part shall comply with the provisions of Table A3. A4 The machined part shall comply with the provisions of Table A4. A5 The performance test and accessories shall comply with the provisions of Table A5. A6
The paint, packaging and factory documents shall comply with the provisions of Table A6. Table A1 Material
Quality characteristics
Name
Main pressure
Component materials
Pressure components
Welding materials
Quality characteristics
Category
Quality characteristics indicators
(1) To reach level b,
(2) Before feeding, an appearance inspection shall be carried out, and a non-destructive inspection shall be carried out when necessary, and a non-destructive inspection shall be carried out. Relevant records and reports (1) Meet C-level requirements (2) Have a purchase specification (1) Meet C-level requirements (2) Have a purchase specification (1) Materials (including substitutes) comply with drawings, GB150 and "Regulations on Safety Technology Supervision of Pressure Vessels" (hereinafter referred to as "Container Regulations"). Requirements (2) Acceptance and re-inspection shall be carried out in accordance with the requirements of the "Specifications", and the control certificate (including marking) shall be traceable (1) Comply with welding technology and relevant standards (2) Control shall be carried out in accordance with the requirements of the "Specifications", and the certificate shall be traceable to the standard of welding inspection tt||Verification facts and evidence
Assessment results
Grade qualification
Quality characteristic
Name of welder qualification
Welding process
Product welding
Class A, B
Weld seam residue
Quality characteristic
Classification
238892
Quality characteristic
Welding of pressure components must The welder shall hold a valid certificate for the corresponding project issued by the labor department. The welder shall have complete welding process assessment and comply with the provisions of JB4708 and GB150 Article 10.5. The control certificate shall be complete and traceable. (1) To achieve level b, the welder shall not return for repair more than once. (3) 100% X-ray. |The rate of flaw detection level I (by number of pieces) shall not be less than 85%
The rate of local radiographic flaw detection level I (by number of pieces) shall not be less than
(4) The pass rate of the first flaw detection (by number of pieces) shall not be less than
(1) To reach level B,
(2) At the same time, the following requirements shall be met:
Plate thickness.
|Residual height e
12<8≤250~2
(2)The same part shall be repaired no more than twice
(3)The rate of 100% radiographic flaw detection level 1 film
(by number of films) shall not be
less than 80%
The rate of local radiographic flaw detection level I film
(by number of films
) shall not be less than
(4)The pass rate of one-time flaw detection
(Number of joints) not less than (1) To reach C level (2) The height difference of the same weld is not greater than e/2 (1) The requirements and results of non-destructive testing shall comply with GB150 and corresponding (2) The repair of the same part shall comply with GB150 regulations and GB150 regulations.com various standard industry data are free to download and check
check welding
worker|||certificate
and||check||original
detection
data
and||film
,
if
weld|||assessment
grade
quality
name
A, B
weld|||width
A2.7C, D Class
Weld quality
A2.8 Weld appearance
A2.9 Weld undercut
A2.10 Nondestructive testing
Marking documents
Quality characteristics
Classification
HG/T2388—92
Continued Table A2
Quality characteristics index
(1) The width of the weld is not
greater than the outer edge of the groove||t t||width plus 4
（2）The width difference of the same weld
is not greater than 3
(3）The width difference of the same type of weld
is not greater than 5
(1) To reach level b,
(2)When the weld leg size
is less than or equal to 8,
its positive deviation is 3 and
its negative deviation is 1.When the weld leg size is greater than 8
and less than 12 , its positive deviation is 4, negative deviation is 1, when the weld foot size is greater than or equal to 12, its positive deviation is 4, negative deviation is 1.5. (1) To achieve grade B, (2) There shall be no grooves, overlaps, or sudden protrusions on the weld surface. The weld is not allowed to have bite marks. Edge
(1) The weld width is not greater than the outer edge width of the groove plus 8
(2) The width difference of the same weld is not greater than 4
(3) The width difference of the same type of weld is not greater than 8
(1) To reach level C,
(2) When the weld leg size
is less than or equal to 8,
its positive deviation is 3,
its negative deviation is 1.5;
When the weld leg size is larger
|8 is less than 12
, its positive deviation
is 4, and its negative deviation is
1.5: When the weld leg size
is greater than or equal to 12
, its positive deviation is
4, and its negative deviation is 2
(1) Perform nondestructive testing according to design requirements
and meet the design quality requirements
(2) When the weld leg size
is greater than or equal to 12
, its positive deviation is
4, and its negative deviation is 2
(1) Carry out nondestructive testing according to design requirements
and meet the design quality requirements
(2) When t|| is less than or equal to 8, its positive deviation is 3 and its negative deviation is 2. When the size of the weld foot is greater than 8 and less than 12, its positive deviation is 4 and its negative deviation is 2. When the size of the weld foot is greater than or equal to 12, its positive deviation is 4 and its negative deviation is 3. There shall be no cracks on the weld surface. Defects such as pores, arc pits and slag inclusions, and no slag and splashes shall be left
Comply with the drawings and the provisions of GB150
(1) The non-destructive testing certificate complies with the relevant standards
(2) There is a non-destructive testing mark location map
(3) The marking is clear and the location is accurate
Standards provide w.boso.com various British standard industry data for free download of equipment inspection
Verify the original
|Original certificate
Welding seam measuring
Special
Measuring tool
Evaluation result
Excellent
Grade
Quality characteristic
Name
A2.11 Post-weld heat treatment
A2124 Welding record
A2.13 Welder's stamp
Quality characteristic
Classification
HG/T 2388—92
Continued Table A2
Quality Characteristics Index
(1) With heat treatment process specifications that conform to the drawings (including heat treatment temperature, holding time, heating and cooling speed, temperature difference of workpieces, furnace temperature, installation position and number of thermocouples) (2) With temperature control that conforms to the process specifications. Automatic measurement record report that conforms to the welding process specifications and is complete and accurate (1) With welder stamp location map of the welds of the main pressure-bearing components of the container (2) The stamp is clear and the location conforms to the process requirements (when the drawings and process regulations do not allow stamping, there should be traceable voucher information) Note: The same type of welds refers to those with the same groove, type and welding method. Table A3 Assembly
Simplified straight
Entertainment straight
Mistral edge
Tolerance 6
（1）Meet the requirements of Class B
(2) Class A welding shall not have holes
12<202
406≤502
Quality characteristic indicators
Conform to the drawings and the provisions of GB150
Conform to the drawings and the provisions of GB150
Class B.
Standards grant website iwebisos
≤1/8%-2
-1≤1/8
and not large
and not large
value not large
《1/58g
1/88g-1
1/8%g-1
and not large
and not large
Check the process
technical specifications
record and
steel tape measure
《1/48g
M1/80m
and not large
various British standard industry data departments free download
assessment results
level grade
assessment results
A35 shoe school| |tt||Tolerance
A3.6 Bright body
A3.7
Dimensions of pipe openings,
supports and
internal parts
A3.8
Total length of equipment body
A3.9
Quality of vessel surface
A319 Head
A3.1 Connection method
Flange assembly
Dimensions
HG/T2388—$2
Continued table A3
Quality characteristic index
Less than or equal to 0.10+1 and not more than 4
Less than or equal to 0.106+
1.5 and not more than 4.5
Not less than Nominal thickness minus pin plate negative deviation C1 (1) meets Class B requirements
(2) Dimension tolerance is not greater than 80% of the value specified in the corresponding standard
Meets the requirements of Class B, surface damage should be repaired
and rounded off transition
(1) Check according to GB150 Article 10.2.2.3, the maximum image is not greater than 1%
2) The wrinkle depth is not greater than 1. and there is no tear
is less than or equal to 0.10% + 2
and not greater than 5
The orientation dimensions meet the drawings and tolerances meet the requirements of the corresponding standards. Meets the requirements of GB150
Bamboo drawings and GB150 Article 10.2.2.3 The requirements of the drawings and GB150 Article 10.2.37 are in accordance with the requirements of the standard photography network. Full
bzEoe0
Cm Customer Standard Industry Information Free Table
Special Sample
Plate Ruler
Thickness Gauge
Pot Tape
Special Measure
Pot Tape
Thickness Gauge
Special Sample
Steel Tape
Evaluation Result
Excellent
Unqualified
Grade
Quality Characteristic
Threaded Parts Above M48 (Including
Main Bolts,
Main Nuts and Washers
Quality of Rings
A4.2 Main nut spherical surface
Sealing surface quality
Quality characteristics category
238892
Table A4 Machining
Quality characteristics indicators
Conform to the drawings and the corresponding provisions of GB150
Conform to the drawings and the corresponding standard requirements
Conform to the drawingsNo
scars, and
effective protection is taken
Note: The quality characteristics of the main sealing surface of the container are Class A. Sequence
Quality characteristic
Name
Strength test
Airtightness test
Purchased safety
Accessories and main
Main accessories
Self-made safety
Accessories and main
Main accessories
Quality characteristic
Category
Conforms to the drawingNo
Radial scratches, and
Protective measures are taken
Conforms to the drawingNo
Radial penetration scratches, and
Protective measures are taken
Performance test and accessories
Quality characteristic index
(1) Reaching level
(2) Unrepaired||tt ||One test
(1) Reach B level
(2) Re-test
Conform to drawings and GB150 regulations
(1) Reach E level
With complete quality of manufacturer
(2) With purchase statement
Qualification certificate
With complete design, test data and qualification certificate Inspection
Special measuring tools
Inspection items:
(1) Mechanical properties
(2) Thread angle
(3) Thread center
(4) Surface roughness
Special measuring tools
Surface roughness
Comparison sample
Verification certificate||tt ||Verification certificate
Verification certificate
Standard recommendation network%, bzEpeccccm Inspection
Evaluation result
Grade grade
Evaluation result
Excellent or not
Grade grade grade
Quality characteristic
Name
Inside of container
Degree of cleanliness
Anti-rust paint
Packaging nameplate
Factory documents
Quality characteristic
Category
HG/T2388-92
Table A6 Paint, packaging and factory documents
Quality characteristic index
Conform to the requirements of drawings and GB150, no water accumulation and The residual debris is in line with the requirements of the drawings and GB150, the paint surface is smooth, and the color is uniform and beautiful
Conforms to the requirements of the drawings, GB150 and the "Container Regulations"Conforms to the requirements of GB150 and the "Container Regulations"
Verify the actual object
Verify the materials
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Evaluation results
Grade and grade
HG/T2388-92
Appendix B
Regulations on the preparation of container product quality classification rules (supplement)
This appendix specifies the composition, content, sequence and expression form of the preparation of container product quality classification rules (hereinafter referred to as the "Rules"). B1 Composition of the "Detailed Rules"
"Cover, first page and table of contents
Overview part Standard name
Subject content and scope of application
Main text
Supplementary part
Cited standards
Product quality grading method
Product inspection details
(Appendix
Additional instructions
B2 Overview of the "Detailed Rules"
B2.1 The cover, first page and table of contents shall comply with the provisions of GB1.1 and GB1.2. B2.2 The name of the "Detailed Rules" consists of two parts: "Product Name" and "Quality Grading Details". B2.3 The introduction may state the degree of adoption of international standards and their numbers and names. B3 Main text
|B3.1 The subject content shall state the main contents specified in the "Detailed Rules". The scope of application shall mainly specify the product scope to which the "Detailed Rules" apply, and the scope of non-applicability may also be clarified when necessary.
B3.2 The referenced standards shall mainly state the standards directly referenced in the "Detailed Rules". B3.3 The product quality grading method shall comply with the provisions of Chapters 4 and 5 of this standard. At the same time, the following contents shall be stated based on the product size, batch composition, production cycle, etc.:
8. Sampling method and name of the information to be provided; b. Inspection regulations for parts that cannot be inspected on the product. B3.4 Product inspection rules
B3.4.1 Product inspection rules shall generally include the following contents: a. Material part;
b. Welding part;||tt ||c. Assembly part;
d. Machining part;
Standard exchange network: mb industry data free download e performance test and accessories;
. Paint, packaging and factory documents.
HG/T2388-92
The contents of each part shall be expressed in a table, and the table format shall comply with Table B1. B3.4.2 Similar quality characteristics items shall be listed separately as parts in Table B1. Quality characteristics indicators at all levels shall comply with the provisions of Table 2 and shall not be lower than the provisions in Appendix A B3.4.3
The inspection method can specify the inspection object, inspection tools and requirements according to the product characteristics. Table B1
Quality characteristics| |tt||Quality characteristics
B3.5 Summary table of product quality inspection
Quality characteristics indicators
Inspection results
Inspection methods
Evaluation results
Fill in the product quality inspection situation in Table B2. The calculation of the level item rate in the table shall comply with the provisions of Article 5.1. Table B2 Summary table of product quality inspection
Quality characteristics
Category
Number of items
Accurate search and control network
Qualified level
Unqualified
All kinds of standard industry materials are free to download
Product number:
Unqualified
Level item rate%
Excellent level+
Qualified levelcom various standard industry materials free download inspection
Evaluation results
Level classification
HG/T2388-92
Appendix B
Regulations on the preparation of container product quality classification rules (supplement)
This appendix stipulates the composition, content, sequence and expression form of the preparation of container product quality classification rules (hereinafter referred to as the "rules"). B1 Composition of the "Detailed Rules"
"Cover, first page and table of contents
Overview part Standard name
Subject content and scope of application
Main text
Supplementary part
Cited standards
Product quality grading method
Product inspection details
(Appendix
Additional instructions
B2 Overview of the "Detailed Rules"
B2.1 The cover, first page and table of contents shall comply with the provisions of GB1.1 and GB1.2. B2.2 The name of the "Detailed Rules" consists of two parts: "Product Name" and "Quality Grading Details". B2.3 The introduction may state the degree of adoption of international standards and their numbers and names. B3 Main text
|B3.1 The subject content shall state the main contents specified in the "Detailed Rules". The scope of application shall mainly specify the product scope to which the "Detailed Rules" apply, and the scope of non-applicability may also be clarified when necessary.
B3.2 The referenced standards shall mainly state the standards directly referenced in the "Detailed Rules". B3.3 The product quality grading method shall comply with the provisions of Chapters 4 and 5 of this standard. At the same time, the following contents shall be stated based on the product size, batch composition, production cycle, etc.:
8. Sampling method and name of the information to be provided; b. Inspection regulations for parts that cannot be inspected on the product. B3.4 Product inspection rules
B3.4.1 Product inspection rules shall generally include the following contents: a. Material part;
b. Welding part;||tt ||c. Assembly part;
d. Machining part;
Standard exchange network: mb industry data free download e performance test and accessories part;
. Paint, packaging and factory documents part.
HG/T2388-92
The contents of each part shall be expressed in a table, and the table format shall comply with Table B1. B3.4.2 The same quality characteristics items shall be listed separately as parts in Table B1. The indicators of quality characteristics at all levels shall comply with the provisions of Table 2 and shall not be lower than the provisions in Appendix A B3.4.3
The inspection method can specify the inspection object, inspection tools and requirements according to the product characteristics. Table B1
Quality characteristics| |tt||Quality characteristics
B3.5 Summary table of product quality inspection
Quality characteristics indicators
Inspection results
Inspection methods
Evaluation results
Fill in the product quality inspection situation in Table B2. The calculation of the level item rate in the table shall comply with the provisions of Article 5.1. Table B2 Summary table of product quality inspection
Quality characteristics
Category
Number of items
Accurate search and control network
Qualified level
Unqualified
All kinds of standard industry materials are free to download
Product number:
Unqualified
Level item rate%
Excellent level+
Qualified levelcom various standard industry materials free download inspection
Evaluation results
Level classification
HG/T2388-92
Appendix B
Regulations on the preparation of container product quality classification rules (supplement)
This appendix stipulates the composition, content, sequence and expression form of the preparation of container product quality classification rules (hereinafter referred to as the "rules"). B1 Composition of the "Detailed Rules"
"Cover, first page and table of contents
Overview part Standard name
Subject content and scope of application
Main text
Supplementary part
Cited standards
Product quality grading methodbzxZ.net
Product inspection details
(Appendix
Additional instructions
B2 Overview of the "Detailed Rules"
B2.1 The cover, first page and table of contents shall comply with the provisions of GB1.1 and GB1.2. B2.2 The name of the "Detailed Rules" consists of two parts: "Product Name" and "Quality Grading Details". B2.3 The introduction may state the degree of adoption of international standards and their numbers and names. B3 Main text
|B3.1 The subject content shall state the main contents specified in the "Detailed Rules". The scope of application shall mainly specify the product scope to which the "Detailed Rules" apply, and the scope of non-applicability may also be clarified when necessary.
B3.2 The referenced standards shall mainly state the standards directly referenced in the "Detailed Rules". B3.3 The product quality grading method shall comply with the provisions of Chapters 4 and 5 of this standard. At the same time, the following contents shall be stated based on the product size, batch composition, production cycle, etc.:
8. Sampling method and name of the information to be provided; b. Inspection regulations for parts that cannot be inspected on the product. B3.4 Product inspection rules
B3.4.1 Product inspection rules shall generally include the following contents: a. Material part;
b. Welding part;||tt ||c. Assembly part;
d. Machining part;
Standard exchange network: mb industry data free download e performance test and accessories;
. Paint, packaging and factory documents.
HG/T2388-92
The contents of each part shall be expressed in a table, and the table format shall comply with Table B1. B3.4.2 Similar quality characteristics items shall be listed separately as parts in Table B1. Quality characteristics indicators at all levels shall comply with the provisions of Table 2 and shall not be lower than the provisions in Appendix A B3.4.3
The inspection method can specify the inspection object, inspection tools and requirements according to the product characteristics. Table B1
Quality characteristics| |tt||Quality characteristics
B3.5 Summary table of product quality inspection
Quality characteristics indicators
Inspection results
Inspection methods
Evaluation results
Fill in the product quality inspection situation in Table B2. The calculation of the level item rate in the table shall comply with the provisions of Article 5.1. Table B2 Summary table of product quality inspection
Quality characteristics
Category
Number of items
Accurate search and control network
Qualified level
Unqualified
All kinds of standard industry materials are free to download
Product number:
Unqualified
Level item rate%
Excellent level+
Qualified level
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