NB/T 20002.4-2013Welding Code for Mechanical Components of PWR Nuclear Islands - Part 4: Qualification of Filler Materials (English PDF)
压水堆核电厂核岛机械设备焊接规范 第4部分：焊接填充材料评定
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Issued by
NEA
Level / Type
Industry · Recommended
Issue date
June 8, 2013
Implementation date
October 1, 2013
Scope
NB/T 20002.4-2013 is the English-translated version of 压水堆核电厂核岛机械设备焊接规范 第4部分：焊接填充材料评定.
NB/T 20002.4-2013 is the Chinese standard "Welding Code for Mechanical Components of PWR Nuclear Islands - Part 4: Qualification of Filler Materials". Its scope clause reads: This part specifies requirements of qualification tests performed on filler materials for fabrication and installation of mechanical components of PWR nuclear islands.
This part is applicable to qualification of filler materials for carbon steel, low alloy steel, austenitic stainless steel, nickel-base alloy welding and cladding.
These filler materials comprise: covered electrode, flux cored electrode and flux (relevant to welding wire or strip electrode of given chemical component). Its clauses include general; limits of validity of qualification.
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Document preview — NB/T 20002.4-2013
National Standard of the People's Republic of China
- ICS
- 27.120.20
- Replacing
- EJ/T 1027-1996
Issued by: National Energy Administration of the People's Republic of China
Contents
- Foreword i
- 1 Scope
- 2 Normative references
- 3 General
- 4 Limits of validity of qualification
- 5 Implementation of qualification tests
- 6 Qualification report
1 Scope
This part specifies requirements of qualification tests performed on filler materials for fabrication and installation of mechanical components of PWR nuclear islands.
This part is applicable to qualification of filler materials for carbon steel, low alloy steel, austenitic stainless steel, nickel-base alloy welding and cladding. These filler materials comprise: covered electrode, flux cored electrode and flux (relevant to welding wire or strip electrode of given chemical component).
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.
GB/T 25775 Technical delivery conditions for welding consumables - Type of product dimensions tolerances and markings (GB/T 25775- 2010, ISO544: 2003, MOD)
NB/T 20002.2 Welding code for mechanical components of PWR nuclear islands - Part 2: Acceptance for welding filler materials
NB/T 20002.3 Welding code for mechanical components of PWR nuclear islands - Part 3: Welding procedure qualification
NB/T 20009.1 Welding material for pressurized water reactor nuclear power plants - Part 1: Carbon steel covered electrodes for class 1, 2, 3 components
NB/T 20009.2 Welding material for pressurized nuclear power plants - Part 2: Low alloy steel covered electrodes for class 1,2,3 components
NB/T 20009.3 Welding material for pressurized nuclear power plants - Part 3: Stainless steel covered electrodes for class 1,2,3 components
NB/T 20009.4 Welding material for pressurized nuclear power plants - Part 4: Nickel-based alloy covered electrodes for class 1,2,3 components
NB/T 20009.5 Welding material for pressurized nuclear power plants - Part 5: Carbon steel flux cored electrodes for gas shielded arc welding of class 1,2,3 components
3 General
3.1
The qualification test performed on filler material aims to qualification of trade designation.
3.2
Qualification tests on filler materials comprise the following:
——tests on filler materials (as delivered);
——deposited metal test: the number of lots of products and the number of test welds shall be sufficient (5 lots at least, the number shall be determined in case of new products) to substantiate the characteristics guaranteed by the supplier of filler materials;
——welding joint test on standard test coupon.
3.3
Tests on filler materials (as delivered) and deposited metal tests shall be carried out by the supplier of filler materials. Based on test result, the supplier shall prepare deposited metal qualification data sheet (The content of the data sheet according to the requirements given in 6.2) for each designation of evaluated material.
3.4
The welding joint qualification test on standard test coupon shall be carried out by the equipment manufacturer. However, in case that the welding procedure qualification test carried out by equipment manufacturer covers the welding joint qualification test, it may render the unnecessary test on standard test coupon.
3.5
The filler materials used for qualification test shall be manufactured under the condition of mass production. The manufacture condition shall meet the requirement of definition of lot given in NB/T 20002.2 so as to ensure the homogeneity of each lot.
3.6
The variables leading to the change of lot number include the following:
a) geometrical dimension of filler materials;
b) heat number used for the filler materials (core wire, welding wire and strip electrode);
c) lot number of flux or electrode coating determined by filler materials manufacturer based on manufacturing condition of various component material and mixture.
3.7
The filler materials intended for qualification test shall be taken from the lots mentioned above.
4 Limits of validity of qualification
4.1 Basic rule
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Referenced standards
Normative references
- GB/T 25775Technical delivery conditions for welding consumables -- Type of product, dimensions, tolerances and markings
- NB/T 20002.2Welding code for nuclear island mechanical equipment of pressurized water reactor nuclear power plant - Part 2: Acceptance of welding filler materials
- NB/T 20002.3Welding code for nuclear island mechanical equipment of pressurized water reactor nuclear power plant - Part 3: Welding procedure qualification
- NB/T 20009.1Welding consumables for pressurized water reactor nuclear power plants - Part 1: Carbon steel electrodes
- NB/T 20009.2Welding consumables for pressurized water reactor nuclear power plants - Part 2: Low alloy steel electrodes
- NB/T 20009.3Welding consumables for pressurized water reactor nuclear power plants - Part 3: Stainless steel welding rods
Cited by
- NB/T 20400-2017Technical specification for fabrication of stainless steel elements of reactor cavity pool and spent fuel pool in PWR nuclear power plant
- NB/T 20407-2017Specification for design and fabrication of reactor vessel internals in pressurized water reactor nuclear power plants
- NB/T 20416-2017Design and manufacture standard for nuclear-grade metal bellows expansion joints for PWR nuclear power plants
- NB/T 20269-2014Design and fabrication specification for reactor coolant pump of pressurized water reactor nuclear power plant
- NB/T 20002.7-2013Welding Code for Mechanical Components of PWR Nuclear Islands - Part 7: Hardfacing
- NB/T 20175-2012Technical Specification for Installation and Acceptance of Fuel Handling and Storage System of PWR Nuclear Power Plants
Similar standards
Editions of NB/T 20002.4
| Edition | Title | Revision | Status |
|---|---|---|---|
| NB/T 20002.4-2013 | Welding Code for Mechanical Components of PWR Nuclear Islands - Part 4: Qualification of Filler Materials | current edition | Current |
| EJ/T 1027-1996 | Welding Code for Mechanical Components of PWR Nuclear Islands - Part 4: Qualification of Filler Materials | previous edition | Superseded |
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Related Standards
GB/T 25775-2010 — Technical delivery conditions for welding consumables -- Type of product, dimensions, tolerances and markings
NB/T 20002.2-2013 — Welding Code for Mechanical Components of PWR Nuclear Islands - Part 2: Acceptance for Welding Filler Materials
NB/T 20002.2-2021 — Welding code for nuclear island mechanical equipment of pressurized water reactor nuclear power plant - Part 2: Acceptance of welding filler materials
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