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JB/T 7927-2014   Valve Cast Steel Visual Quality Requirements (English Version)
Standard No.: JB/T 7927-2014 Status:valid remind me the status change

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Language:English File Format:PDF
Word Count: 17500 words Price(USD):520.0 remind me the price change

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Implemented on:2014-11-1 Delivery: via email in 1 business day
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Standard No.: JB/T 7927-2014
English Name: Valve Cast Steel Visual Quality Requirements
Chinese Name: 阀门铸钢件外观质量要求
Professional Classification: JB    Professional Standard - Machinery
Issued by: Ministry of Industry and Information Technology
Issued on: 2014-07-09
Implemented on: 2014-11-1
Status: valid
Superseding:JB/T 7927-1999 Valve cast steel visual quality requirements
Language: English
File Format: PDF
Word Count: 17500 words
Price(USD): 520.0
Delivery: via email in 1 business day
Valve cast steel visual quality requirements 1 Scope This standard specifies the types and characteristics of surface defects of valves, flanges, fittings and their pressure retaining castings. This standard is applicable to the visual inspection and acceptance of the surface quality of valves, flanges, fittings and their pressure retaining castings. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies. GB/T 12229 General purpose industrial valves — Specification of carbon steel castings GB/T 12230 General purpose industrial valves — Specification of stainless steel castings JB/T 5263 Specification for steel casting for power station valves JB/T 6439 Methods of magnetic examination for valves JB/T 6440 Methods of radiographic examination for steel castings valves JB/T 6902 Methods for liquid penetrant examination of valves 3 Surface quality evaluation 3.1 Cast steel shall be inspected after cleaning, dressing and painting, compared with the surface of cast steel according to the photos specified in this standard (see Clause 5), and evaluated for various defects. 3.2 This standard collects 12 types of surface defects (see 5.1 to 5.12, and each defect type includes 5 example photos represented by A, B, C, D and E. In each defect, 2 example photos of A and B indicate that defects of this degree are acceptable (qualified), and 3 example photos of C, D and E are unacceptable (unqualified) defects. The guiding principles of this standard shall be considered acceptable for defects that are significantly smaller than unacceptable defects. 3.3 This standard photo comes from the actual casting. The photo shows the surface defects of casting. Each type of surface defects can only be judged by comparing the series of photos of the same type. 3.4 In view of the possible problems if the same standard is used to judge castings with large differences in specifications and wall thicknesses, the photos provided in this standard are examples of drawings specifying the actual dimensions of any 100 mm × 125 mm area on the surface of castings. 4 Description of rating photos 4.1 This standard provides 60 rating photos showing various casting defects that can be seen by visual observation. The description of all defect types [type a) ~ type 1)] in the rating photo is only applicable to surface defects, not internal defects. 4.2 The types and characteristics of various surface defects are described as follows: ——Type a) Crack: Linear cracking on the surface of cast steel due to internal and external stresses. Generally, obvious surface cracks are unqualified.
Foreword i Introduction iii 1 Scope 2 Normative references 3 Surface quality evaluation 4 Description of rating photos 5 Rating photos Annex A (Informative) Structural changes and description of this standard with respect to ANSI/MSS SP-55-2011 Table A.1 Comparison between this standard and ANSI/MSS SP-55-2011 in clause and subclause numbers
Referred in JB/T 7927-2014:
*GB/T 12229-2005 General purpose industrial valve - Specification of spheroidal graphite iron castings
*GB/T 12230-2005 General purpose industrial valve - Specification of stainless steel castings
*JB/T 5263-2005 Specification for steel casting for power station valves
*JB/T 6439-2008 Methods of magnetic examination for valves
*JB/T 6440-2008 Methods of radiographic examination for steel castings valves
*JB/T 6902-2008 Methods for liquid penetrant examination of valves
JB/T 7927-2014 is referred in:
* GB/T 22513-2008 Petroleum and natural gas industries - Drilling and production equipment - Wellhead and christmas tree equipment
* GB/T 22513-2008 Petroleum and natural gas industries - Drilling and production equipment - Wellhead and christmas tree equipment
* GB/T 12229-2005 General purpose industrial valve - Specification of spheroidal graphite iron castings
*DL/T 5054-2016 Code for design of steam water piping in thermal power plant
*GB/T 24918-2010 Cryogenic emergency shutoff valve
*GB/T 12224-2015 General requirements for industrial steel valves
*GB/T 24925-2019 Low temperature valve—Technical specifications
*JB/T 7248-2008 Technical specification for low temperature service steel casting for valves
*T/CGMA 0407-2022 Cryogenic valves for hydrogen ― General technical specifications
Code of China
Standard
JB/T 7927-2014  Valve Cast Steel Visual Quality Requirements (English Version)
Standard No.JB/T 7927-2014
Statusvalid
LanguageEnglish
File FormatPDF
Word Count17500 words
Price(USD)520.0
Implemented on2014-11-1
Deliveryvia email in 1 business day
Detail of JB/T 7927-2014
Standard No.
JB/T 7927-2014
English Name
Valve Cast Steel Visual Quality Requirements
Chinese Name
阀门铸钢件外观质量要求
Chinese Classification
Professional Classification
JB
ICS Classification
Issued by
Ministry of Industry and Information Technology
Issued on
2014-07-09
Implemented on
2014-11-1
Status
valid
Superseded by
Superseded on
Abolished on
Superseding
JB/T 7927-1999 Valve cast steel visual quality requirements
Language
English
File Format
PDF
Word Count
17500 words
Price(USD)
520.0
Keywords
JB/T 7927-2014, JB 7927-2014, JBT 7927-2014, JB/T7927-2014, JB/T 7927, JB/T7927, JB7927-2014, JB 7927, JB7927, JBT7927-2014, JBT 7927, JBT7927
Introduction of JB/T 7927-2014
Valve cast steel visual quality requirements 1 Scope This standard specifies the types and characteristics of surface defects of valves, flanges, fittings and their pressure retaining castings. This standard is applicable to the visual inspection and acceptance of the surface quality of valves, flanges, fittings and their pressure retaining castings. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies. GB/T 12229 General purpose industrial valves — Specification of carbon steel castings GB/T 12230 General purpose industrial valves — Specification of stainless steel castings JB/T 5263 Specification for steel casting for power station valves JB/T 6439 Methods of magnetic examination for valves JB/T 6440 Methods of radiographic examination for steel castings valves JB/T 6902 Methods for liquid penetrant examination of valves 3 Surface quality evaluation 3.1 Cast steel shall be inspected after cleaning, dressing and painting, compared with the surface of cast steel according to the photos specified in this standard (see Clause 5), and evaluated for various defects. 3.2 This standard collects 12 types of surface defects (see 5.1 to 5.12, and each defect type includes 5 example photos represented by A, B, C, D and E. In each defect, 2 example photos of A and B indicate that defects of this degree are acceptable (qualified), and 3 example photos of C, D and E are unacceptable (unqualified) defects. The guiding principles of this standard shall be considered acceptable for defects that are significantly smaller than unacceptable defects. 3.3 This standard photo comes from the actual casting. The photo shows the surface defects of casting. Each type of surface defects can only be judged by comparing the series of photos of the same type. 3.4 In view of the possible problems if the same standard is used to judge castings with large differences in specifications and wall thicknesses, the photos provided in this standard are examples of drawings specifying the actual dimensions of any 100 mm × 125 mm area on the surface of castings. 4 Description of rating photos 4.1 This standard provides 60 rating photos showing various casting defects that can be seen by visual observation. The description of all defect types [type a) ~ type 1)] in the rating photo is only applicable to surface defects, not internal defects. 4.2 The types and characteristics of various surface defects are described as follows: ——Type a) Crack: Linear cracking on the surface of cast steel due to internal and external stresses. Generally, obvious surface cracks are unqualified.
Contents of JB/T 7927-2014
Foreword i Introduction iii 1 Scope 2 Normative references 3 Surface quality evaluation 4 Description of rating photos 5 Rating photos Annex A (Informative) Structural changes and description of this standard with respect to ANSI/MSS SP-55-2011 Table A.1 Comparison between this standard and ANSI/MSS SP-55-2011 in clause and subclause numbers
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Keywords:
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