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GB/T 7735-2016/XG1-2021   Automated eddy current testing of seamless and welded (except submerged arc-welded) steel tubes for detection of imperfections,includes Amendment 1 (English Version)
Standard No.: GB/T 7735-2016/XG1-2021 Status:valid remind me the status change

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Standard No.: GB/T 7735-2016/XG1-2021
English Name: Automated eddy current testing of seamless and welded (except submerged arc-welded) steel tubes for detection of imperfections,includes Amendment 1
Chinese Name: 《无缝和焊接(埋弧焊除外)钢管缺欠的自动涡流检测》含国家标准第1号修改单
Chinese Classification: H26    Metal nondestructive testing method
Professional Classification: GB    National Standard
ICS Classification: 77.040.20 77.040.20    Non-destructive testing of metals 77.040.20
Issued by: AQSIQ; SAC
Issued on: 2021-04-30
Implemented on: 2021-4-30
Status: valid
Superseding:GB/T 7735-2016 Automated eddy current testing of seamless and welded (except submerged arc-welded) steel tubes for detection of imperfections
Language: English
File Format: PDF
Word Count: 7500 words
Price(USD): 120.0
Delivery: via email in 1 business day
Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative. This standard is prepared according to the rules given in GB/T 1.1-2009. This standard supersedes GB/T 7735-2004 Steel tubes—The inspection method on eddy current test. This standard includes the following significant technical changes with respect to GB/T 7735-2004: ——change of the standard name; ——change of the scope (See Clause 1, and Clause 1 in 2004 edition); ——addition of contents of Normative references, Terms and definitions and General requirements (See Clause 2, 3 and 4); ——modification of content of test method (See Subclause 5.1, and Subclause 5.1 in 2004 edition) ——modification of content of test equipment (See Subclause 5.2, and Clause 7 in 2004 edition) ——modification of requirements on material quality of reference tubes (See Subclause 6.1.2, and Subclause 6.1.1 in 2004 edition) ——modification of requirements on the width and length of reference notch (See Subclause 6.5.2.2, and Subclause 6.4 in 2004 edition) ——modification of content of acceptance level and identification (See Subclause 6.5.1 and 6.5.3.2, and Subclause 6.4.1 and 6.4.2 in 2004 edition) ——addition of NOTEs after the acceptance levels, to specify the acceptance level for replaced hydrostatic test (See Subclause 6.5.1 and 6.5.2.2, and Subclause 6.4.1 and 6.4.2 in 2004 edition) ——modification of specification on equipment calibration and checking (See Clause 7, and Clause 8 in 2004 edition) ——modification of determination on suspect tubes (See Subclause 8.2, and Subclause 9.2 in 2004 edition) ——modification of content of Annex A(See Annex A, and Annex A in 2004 Edition) This standard is identical to ISO 10893-2:2011 Non-destructive testing of steel tubes -- Part 2: Automated eddy current testing of seamless and welded (except submerged arc-welded) steel tubes for the detection of imperfections (English version), by using translation method. The following standard has a consistency corresponding relationship to the international standard listed in the Normative references of this standard: GB/T 9445-2015 Non-destructive testing—Qualification and certification of NDT personnel (ISO 9712:2012, IDT) The following editorial changes are made in this standard: ——Change of the standard name according to China’s language customs; ——For the purpose of convenient use, “NOTE: Acceptance level E4H may be used as the acceptance level of eddy current testing which replaces hydrostatic test ” is added on Subcluase 6.5.1. “NOTE: Acceptance level E4 may be used as the acceptance level of eddy current testing which replaces hydrostatic test ” is added on Subclause 6.5.2.2. This standard was proposed by China Iron and Steel Industry Association. This standard is under the jurisdiction of the National Technical Committee 183 on Steel of Standardization Administration of China (SAC/TC 183). This standard was drafted by Hunan Hengyang Steel Tube (Group) Co., Ltd., Shanxi Taigang Stainless Steel Tube Co., Ltd. and China Metallurgical Information standardization Institute. The previous editions of the standards superseded by this standard are as follows: ——GB/T 7735-1995; ——GB/T 7735-2004. Automated eddy current testing of seamless and welded (except submerged arc-welded) steel tubes for detection of imperfections 1 Scope This standard specifies requirements for automated eddy current testing of seamless and welded tubes with the exception of submerged arc-welded (SAW) tubes, for the detection of imperfections according to the different acceptance levels as shown in Tables 1 and 2. It is applicable to the inspection of tubes with an outside diameter greater than or equal to 4 mm. This standard can also be applicable to the testing of hollow sections. 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 of the referenced document (including any amendments) applies. ISO 9712 Non-destructive testing — Qualification and certification of personnel ISO 11484 Steel products — Employer's qualification system for non-destructive testing (NDT) personnel 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 11484 and the following apply. 3.1 reference standard standard for the calibration of non-destructive testing equipment (e.g. drill holes, notches and recesses) 3.2 reference tube tube or length of tube containing the reference standard(s) 3.3 reference sample sample (e.g. segment of tube, plate or strip) containing the reference standard(s) NOTE: Only the term “reference tube” is used in this standard, also covering the term “reference sample”. 3.4 tube hollow long product open at both ends, of any cross-sectional shape 3.5 seamless tube tube made by piercing a solid product to obtain a tube hollow, which is further processed, either hot or cold, into its final dimensions 3.6 welded tube tube made by forming a hollow profile from a flat product and welding adjacent edges together, and which after welding can be further processed, either hot or cold, into its final dimensions 3.7 manufacturer organization that manufactures products in accordance with the relevant standard(s) and declares the compliance of the delivered products with all applicable provisions of the relevant standard(s) 3.8 agreement contractual arrangement between the manufacturer and purchaser at the time of enquiry and order 4 General requirements 4.1 Unless otherwise specified by the product standard or agreed on by the purchaser and manufacturer, this eddy current inspection shall be carried out on tubes after completion of all the production process operations, such as rolling, heat treating, cold forming and hot working, sizing and primary straightening. 4.2 The tubes being tested shall be sufficiently straight to ensure the validity of the test. The surfaces shall be sufficiently free of foreign matter which can interfere with the validity of the test. 4.3 This inspection shall be carried out by trained operators qualified in accordance with ISO 9712, ISO 11484 or equivalent and supervised by competent personnel nominated by the manufacturer. In the case of third-party inspection, this shall be agreed on between the purchaser and manufacturer. The operating authorization issued by the employer shall be according to a written procedure. NDT operations shall be authorized by a level 3 NDT individual approved by the employer. NOTE The definition of levels 1, 2 and 3 can be found in appropriate International Standards, e.g. ISO 9712 and ISO 11484. 5 Test method 5.1 Test techniques 5.1.1 The tubes shall be tested by the eddy current method for the detection of imperfections using in “absolute mode” and/or in “differential mode” one of the following alternative automated or semi-automated techniques: a) concentric coil technique — full peripheral (see Figure 1); b) fixed or rotating probe/pancake coil technique — full peripheral (see Figure 2); c) segment coil technique — weld seam only (see Figure 3) or full body (see Figure 4). For all techniques, the chosen relative speed of movement during the testing shall not vary by more than ±10 %. It is recognized that there may be a short length at both tube ends which cannot be tested. Any untested ends shall be dealt with in accordance with the requirements of the appropriate product standards. NOTE: See Annex A for guidelines on the limitations of the eddy current test method. 5.1.2 When testing tubes using the concentric coil technique, the maximum tube outside diameter that shall be tested shall be restricted to 180 mm (250 mm for E4H). Square and rectangular tubes, used for structural purposes, with a maximum dimension across the diagonal of 180 mm may also be tested using this technique with adequately shaped coils. 5.1.3 When testing tubes using the rotating or fixed probe/pancake coil technique, the tube and the probe/pancake coil shall be moved relative to each other or the movement shall be simulated by electronic commutation through the individual probes composing the pancake, such that the whole of the tube surface is scanned. There is no restriction on the maximum tube outside diameter using this technique. NOTE: It is emphasized that only external surface breaking imperfections can be detected using this technique. 5.1.4 When testing the weld of welded tubes using the segment coil technique, there is no restriction on the maximum tube outside diameter. The test coil shall be maintained in proper alignment with the weld, such as that the whole of the weld is scanned. 5.1.5 When testing the full body of tubes using the segment coils technique, the maximum tube outside diameter that shall be tested shall be limited to: — the maximum tube outside diameter shall be 219.1 mm for 2 × 180° coils, — the maximum tube outside diameter shall be 508.0 mm for 4 × 100° coils. NOTE It is emphasized that the test sensitivity is at a maximum at the tube surface adjacent to the test coil and decreases with increasing thickness (see Annex A). 5.2 Test equipment The equipment shall be capable of classifying tubes as either acceptable or suspect tubes by means of an automated trigger/alarm level combined with a marking and/or sorting system.
Referred in GB/T 7735-2016/XG1-2021:
*GB/T 1591-2018 High strength low alloy structural steels
*GB 4943.1-2011 Information technology equipment -Safety - Part 1: General requirements
*GB 2763-2021 National Food Safety Standard-Maximum Residue Limits for Pesticides in Food
*GB/T 35590-2017 Information technology―General specification for portable digital equipments used power bank
*QB/T 1858-2004 Perfume and cologne
*HG/T 20592-2009 Stee1 Pipe F1anges (PN designated)
*GB 3565-2005 Safety requirements for bicycles
*GB/T 39335-2020 Information security technology—Guidance for personal information security impact assessment
*GA 374-2019 Burglary-resistant electronic locks
*GB/T 19001-2016 Quality management systems―Requirements
*GB 4943.1-2022 Audio/video,information and communication technology equipment—Part 1: Safety requirements
*GB 4806.7-2016 National Food Safety Standard - Food Contact Plastic Materials and Articles
*GB/T 35590-2017 Information technology―General specification for portable digital equipments used power bank
*GB 150-2011 Pressure Vessels (Collection GB150.1~150.4-2011)
*GB/T 5750-2006 Standard examination methods for drinking water
*JB/T 10391-2008 Specification for Yseries(IP44)three asynchronous motor (Frame size 80~355)
*GB 14880-2012 National Food Safety Standard for the Use of Nutritional Fortification Substances in Foods
*GB 9706.1-2020 Medical electrical equipment—Part 1: General requirements for basic safety and essential performance
GB/T 7735-2016/XG1-2021 is referred in:
*GB/T 3639-2009 Seamless cold-drawn or cold-rolled steel tubes for precision applications
*GB/T 12771-2008 Welded stainless steel pipes for liquid delivery
*DL/T 932-2019 Guide of operation and maintenance for the condenser and vacuum system of power plant
*GB/T 24593-2018 Welded austenitic stainless steel tubes for boiler and heat exchanger
*YB/T 5209-2020 Electric-welded steel tubes for cardan shaft
*GB/T 3093-2021 High-pressure seamless steel tubes for diesel engine
*GB/T 34020.2-2017 Double wall copper-brazed steel tubes--Part 2: Tubing system for automobiles
*GB 1886.3-2016 National Food Safety Standard - Food Additives - DCP
*GB 1886.3-2021 National food safety standard Food additives - Calcium hydrogen phosphate
*DB11/501-2007 Integrated Emission Standards of Air Pollutants
*GB/T 16855.2-2007 Safety of machinery- Safety-related parts of control systems- Part 2: Validation
*GB/T 16855.2-2015 Safety of machinery—Safety-related parts of control systems—Part 2: Validation
*GB/T 12224-1989 General requirements for industrial steel valves
*GB 50084-2017-EP Explanation on provisions for code of design for sprinkler systems
*GB 50084-2017-TWSM Explanation on provisions for code of design for sprinkler systems
*GB 5009.92-2016 National Food Safety Standard-Determination of Calcium in Foods
*GB 5009.124-2016 National Food Safety Standard-Determination of Amino Acid in Foods
*GB 5009.154-2016 National food safety standard-Determination of vitamin B6 in foods
*GB 5009.158-2016 National Food Safety Standard Determination of Vitamin K1 in Foods
*GB 5009.168-2016 National Food Safety Standard —Determination of Fatty Acid in Foods
*GB 5009.263-2016 National Food Safety Standard--Determination of Aspartame and Alitame in Foods
*GB 5009.90-2016 National Food Safety Standard-Determination of Iron in Foods
*GB 5009.89-2016 National Food Safety Standard--Determination of Niacin and Nicotinamide in Foods
*GB 5009.87-2016 National Food Safety Standard Determination of Phosphorus in Foods
*GB 5009.85-2016 National Food Safety Standard-Determination of Vitamin B2 in Foods
*GB 5009.83-2016 National Food Safety Standard Determination of Carotene in Foods
*GB 5009.82-2016 National Food Safety Standard -- Determination of Vitamins A, D and E in Foods
*GB 5009.33-2016 National food safety standard-Determination of nitrite and nitrate in foods
*GB 5009.24-2016 National Food Safety Standard — Determination of M Aflatoxins in Foods
*GB 5009.22-2016 National Food Safety Standard--Determination of B-group and G-group Aflatoxins in Foods
*GB 5009.8-2016 National Food Safety Standard--Determination of Fructose, Glucose, Sucrose, Maltose and Lactose in Foods
*GB 5009.6-2016 National Food Safety Standard — Determination of Fat in Foods
*GB 5009.5-2016 National Food Safety Standard — Determination of Protein in Foods
*GB/T 13667.4-2013 Steel Book Shelves - Part 4: Electric Dense Bookshelf
*GB/T 30366-2013 Terminology Related to Biomass
*GB/T 30420.1-2013 Sewing Machine Terminology - Part 1: Basic Terminology
*GB/T 5169.44-2013 Fire Hazard Testing for Electric and Electronic Products - Part 44: Guidance for Assessing the Fire Hazard - Fire Hazard Assessment
*GB/Z 23751.3-2013 Micro fuel-cell power generation system - Part 3: Interchangeability of fuel vessels
*GB/T 6519-2013 Ultrasonic inspection of wrought aluminium and magnesium alloy products
*GB 19212.17-2013 Safety of transformers, reactors, power supply units and similar products for supply voltages up to 1 100V - Part 17: Particular requirements and tests for switch mode power supply un
*GB 826-1989 key for original document of administration
*GB 11945-1989 Autoclaved lime-sand brick
*GB 10783-1989 Food additive - Chilli orange
*GB 10963-1989 Circuit-breakers for household and similar installations
*GB/T 9770-1988 Steel cord conveyor belts
*GB 10252-1988 Regulations for radiation protection of 60Co irradiation processing facility
*GB 4706.19-1988 Safety of household and similar electrical appliances --Particular requirements for liquid heaters
Code of China
Standard
GB/T 7735-2016/XG1-2021  Automated eddy current testing of seamless and welded (except submerged arc-welded) steel tubes for detection of imperfections,includes Amendment 1 (English Version)
Standard No.GB/T 7735-2016/XG1-2021
Statusvalid
LanguageEnglish
File FormatPDF
Word Count7500 words
Price(USD)120.0
Implemented on2021-4-30
Deliveryvia email in 1 business day
Detail of GB/T 7735-2016/XG1-2021
Standard No.
GB/T 7735-2016/XG1-2021
English Name
Automated eddy current testing of seamless and welded (except submerged arc-welded) steel tubes for detection of imperfections,includes Amendment 1
Chinese Name
《无缝和焊接(埋弧焊除外)钢管缺欠的自动涡流检测》含国家标准第1号修改单
Chinese Classification
H26
Professional Classification
GB
ICS Classification
Issued by
AQSIQ; SAC
Issued on
2021-04-30
Implemented on
2021-4-30
Status
valid
Superseded by
Superseded on
Abolished on
Superseding
GB/T 7735-2016 Automated eddy current testing of seamless and welded (except submerged arc-welded) steel tubes for detection of imperfections
Language
English
File Format
PDF
Word Count
7500 words
Price(USD)
120.0
Keywords
GB/T 7735-2016/XG1-2021, GB 7735-2016/XG1-2021, GB 7735-2016XG1-2021, GB/T7735-2016/XG1-2021, GB/T 7735, GB/T7735, GB7735-2016/XG1-2021, GB 7735, GB7735, GB7735-2016XG1-2021, GB 7735, GB7735
Introduction of GB/T 7735-2016/XG1-2021
Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative. This standard is prepared according to the rules given in GB/T 1.1-2009. This standard supersedes GB/T 7735-2004 Steel tubes—The inspection method on eddy current test. This standard includes the following significant technical changes with respect to GB/T 7735-2004: ——change of the standard name; ——change of the scope (See Clause 1, and Clause 1 in 2004 edition); ——addition of contents of Normative references, Terms and definitions and General requirements (See Clause 2, 3 and 4); ——modification of content of test method (See Subclause 5.1, and Subclause 5.1 in 2004 edition) ——modification of content of test equipment (See Subclause 5.2, and Clause 7 in 2004 edition) ——modification of requirements on material quality of reference tubes (See Subclause 6.1.2, and Subclause 6.1.1 in 2004 edition) ——modification of requirements on the width and length of reference notch (See Subclause 6.5.2.2, and Subclause 6.4 in 2004 edition) ——modification of content of acceptance level and identification (See Subclause 6.5.1 and 6.5.3.2, and Subclause 6.4.1 and 6.4.2 in 2004 edition) ——addition of NOTEs after the acceptance levels, to specify the acceptance level for replaced hydrostatic test (See Subclause 6.5.1 and 6.5.2.2, and Subclause 6.4.1 and 6.4.2 in 2004 edition) ——modification of specification on equipment calibration and checking (See Clause 7, and Clause 8 in 2004 edition) ——modification of determination on suspect tubes (See Subclause 8.2, and Subclause 9.2 in 2004 edition) ——modification of content of Annex A(See Annex A, and Annex A in 2004 Edition) This standard is identical to ISO 10893-2:2011 Non-destructive testing of steel tubes -- Part 2: Automated eddy current testing of seamless and welded (except submerged arc-welded) steel tubes for the detection of imperfections (English version), by using translation method. The following standard has a consistency corresponding relationship to the international standard listed in the Normative references of this standard: GB/T 9445-2015 Non-destructive testing—Qualification and certification of NDT personnel (ISO 9712:2012, IDT) The following editorial changes are made in this standard: ——Change of the standard name according to China’s language customs; ——For the purpose of convenient use, “NOTE: Acceptance level E4H may be used as the acceptance level of eddy current testing which replaces hydrostatic test ” is added on Subcluase 6.5.1. “NOTE: Acceptance level E4 may be used as the acceptance level of eddy current testing which replaces hydrostatic test ” is added on Subclause 6.5.2.2. This standard was proposed by China Iron and Steel Industry Association. This standard is under the jurisdiction of the National Technical Committee 183 on Steel of Standardization Administration of China (SAC/TC 183). This standard was drafted by Hunan Hengyang Steel Tube (Group) Co., Ltd., Shanxi Taigang Stainless Steel Tube Co., Ltd. and China Metallurgical Information standardization Institute. The previous editions of the standards superseded by this standard are as follows: ——GB/T 7735-1995; ——GB/T 7735-2004. Automated eddy current testing of seamless and welded (except submerged arc-welded) steel tubes for detection of imperfections 1 Scope This standard specifies requirements for automated eddy current testing of seamless and welded tubes with the exception of submerged arc-welded (SAW) tubes, for the detection of imperfections according to the different acceptance levels as shown in Tables 1 and 2. It is applicable to the inspection of tubes with an outside diameter greater than or equal to 4 mm. This standard can also be applicable to the testing of hollow sections. 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 of the referenced document (including any amendments) applies. ISO 9712 Non-destructive testing — Qualification and certification of personnel ISO 11484 Steel products — Employer's qualification system for non-destructive testing (NDT) personnel 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 11484 and the following apply. 3.1 reference standard standard for the calibration of non-destructive testing equipment (e.g. drill holes, notches and recesses) 3.2 reference tube tube or length of tube containing the reference standard(s) 3.3 reference sample sample (e.g. segment of tube, plate or strip) containing the reference standard(s) NOTE: Only the term “reference tube” is used in this standard, also covering the term “reference sample”. 3.4 tube hollow long product open at both ends, of any cross-sectional shape 3.5 seamless tube tube made by piercing a solid product to obtain a tube hollow, which is further processed, either hot or cold, into its final dimensions 3.6 welded tube tube made by forming a hollow profile from a flat product and welding adjacent edges together, and which after welding can be further processed, either hot or cold, into its final dimensions 3.7 manufacturer organization that manufactures products in accordance with the relevant standard(s) and declares the compliance of the delivered products with all applicable provisions of the relevant standard(s) 3.8 agreement contractual arrangement between the manufacturer and purchaser at the time of enquiry and order 4 General requirements 4.1 Unless otherwise specified by the product standard or agreed on by the purchaser and manufacturer, this eddy current inspection shall be carried out on tubes after completion of all the production process operations, such as rolling, heat treating, cold forming and hot working, sizing and primary straightening. 4.2 The tubes being tested shall be sufficiently straight to ensure the validity of the test. The surfaces shall be sufficiently free of foreign matter which can interfere with the validity of the test. 4.3 This inspection shall be carried out by trained operators qualified in accordance with ISO 9712, ISO 11484 or equivalent and supervised by competent personnel nominated by the manufacturer. In the case of third-party inspection, this shall be agreed on between the purchaser and manufacturer. The operating authorization issued by the employer shall be according to a written procedure. NDT operations shall be authorized by a level 3 NDT individual approved by the employer. NOTE The definition of levels 1, 2 and 3 can be found in appropriate International Standards, e.g. ISO 9712 and ISO 11484. 5 Test method 5.1 Test techniques 5.1.1 The tubes shall be tested by the eddy current method for the detection of imperfections using in “absolute mode” and/or in “differential mode” one of the following alternative automated or semi-automated techniques: a) concentric coil technique — full peripheral (see Figure 1); b) fixed or rotating probe/pancake coil technique — full peripheral (see Figure 2); c) segment coil technique — weld seam only (see Figure 3) or full body (see Figure 4). For all techniques, the chosen relative speed of movement during the testing shall not vary by more than ±10 %. It is recognized that there may be a short length at both tube ends which cannot be tested. Any untested ends shall be dealt with in accordance with the requirements of the appropriate product standards. NOTE: See Annex A for guidelines on the limitations of the eddy current test method. 5.1.2 When testing tubes using the concentric coil technique, the maximum tube outside diameter that shall be tested shall be restricted to 180 mm (250 mm for E4H). Square and rectangular tubes, used for structural purposes, with a maximum dimension across the diagonal of 180 mm may also be tested using this technique with adequately shaped coils. 5.1.3 When testing tubes using the rotating or fixed probe/pancake coil technique, the tube and the probe/pancake coil shall be moved relative to each other or the movement shall be simulated by electronic commutation through the individual probes composing the pancake, such that the whole of the tube surface is scanned. There is no restriction on the maximum tube outside diameter using this technique. NOTE: It is emphasized that only external surface breaking imperfections can be detected using this technique. 5.1.4 When testing the weld of welded tubes using the segment coil technique, there is no restriction on the maximum tube outside diameter. The test coil shall be maintained in proper alignment with the weld, such as that the whole of the weld is scanned. 5.1.5 When testing the full body of tubes using the segment coils technique, the maximum tube outside diameter that shall be tested shall be limited to: — the maximum tube outside diameter shall be 219.1 mm for 2 × 180° coils, — the maximum tube outside diameter shall be 508.0 mm for 4 × 100° coils. NOTE It is emphasized that the test sensitivity is at a maximum at the tube surface adjacent to the test coil and decreases with increasing thickness (see Annex A). 5.2 Test equipment The equipment shall be capable of classifying tubes as either acceptable or suspect tubes by means of an automated trigger/alarm level combined with a marking and/or sorting system.
Contents of GB/T 7735-2016/XG1-2021
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Keywords:
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