NB/T 20002.2-2013 Welding code for mechanical components of PWR nuclear islands - Part 2: Acceptance for welding filler materials
1 Scope
This part specifies the acceptance criteria for welding filler materials used for mechanical components of PWR nuclear islands.
This part is applicable to acceptance of welding filler materials, such as covered electrodes, wires, strip electrodes and fluxes, used for welding of carbon steel, low alloy steel, austenitic stainless steel, nickel-based alloy and surfacing (excluding hardfacing).
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 223 Methods for chemical analysis of iron, steel and alloy
GB/T 5293 Carbon steel electrodes and flux for submerged arc welding
GB/T 12470 Low-alloy steel electrodes and flux for submerged arc welding
GB/T 17854 Stainless steel electrodes and flux for submerged arc welding
GB/T 25775 Technical delivery conditions for welding consumables (GB/T 25775 - 2010, ISO 544: 2003, MOD)
GB/T 25778-2010 Procurement guidelines for welding consumables (GB/T 25778 - 2010, ISO 14344: 2010, MOD)
NB/T 20002.4 Welding code for mechanical components of PWR nuclear islands - Part 4: Qualification of filler materials
NB/T 20003.2-2010 Non-destructive testing for mechanical components in nuclear island of nuclear power plants - Part 2: Ultrasonic testing
NB/T 20003.3-2010 Non-destructive testing for mechanical components in nuclear island of nuclear power plants - Part 3: Radiographic testing
NB/T 20004-2011 Physical and chemical test methods for material used in nuclear island mechanical components of nuclear power plants
NB/T 20009.1-2010 Welding materials for PWR nuclear power plants - Part 1: Carbon steel covered electrodes for class 1, 2, 3 components
NB/T 20009.2-2010 Welding materials for PWR nuclear power plants - Part 2: Low alloy steel covered electrodes for class 1, 2, 3 components
NB/T 20009.3-2010 Welding materials for PWR nuclear power plants - Part 3: stainless steel covered electrodes for class 1, 2, 3 components
NB/T 20009.4-2013 Welding material for pressurized water reactor nuclear power plants - Part 4: Nickel-based alloy covered electrodes for class 1, 2, 3 components
NB/T 20009.5-2013 Welding material for pressurized water reactor nuclear power plants - Part 5: Carbon steel flux cored electrodes for gas shielded are welding of class 1, 2, 3 components
NB/T 20009.6-2012 Welding materials for PWR nuclear power plants - Part 6: Carbon steel electrodes and rods for gas shielded arc welding of class 1, 2, 3 components
NB/T 20009.7-2012 Welding materials for PWR nuclear power plants - Part 7: Stainless steel wires and filler rods for class 1, 2, 3 components
NB/T 20009.8-2012 Welding materials for PWR nuclear power plants - Part 8: Nickel-based alloy wires and filler rods for class 1, 2, 3 components
NB/T 20009.9-2013 Welding material for pressurized water reactor nuclear power plants -Part 9: Carbon steel wires and fluxes for submerged are welding of class 1, 2, 3 components
NB/T 20009.10-2013 Welding material for pressurized water reactor nuclear power plants - Part 10: Low alloy steel welding wire and flux for submerged are welding of class 1 components
NB/T 20009.11-2013 Welding material for pressurized water reactor nuclear power plants - Part 11: Stainless steel wires and fluxes for submerged are welding of class 1, 2, 3 components
NB/T 20009.12-2013 Welding material for pressurized water reactor nuclear power plants - Part 12: Nickel-based alloy strip cladding with flux for class 1 components
NB/T 20009.13-2013 Welding material for pressurized water reactor nuclear power plants - Part 13: Stainless steel strips and fluxes for cladding of class 1, 2, 3 components
3 General
3.1 The purpose of acceptance of welding filler materials is to establish that the lots of filler materials used are of a constant quality similar to that of the lots which have undergone qualification tests, and are in compliance with the requirements of the manufacturer's [1) The manufacturer refers to equipment manufacturer and construction company(ies).]1) welding material procurement specification.
3.2 The welding material supplier shall conduct all tests in accordance with this standard in lots for the welding filler materials. The acceptance tests shall be carried out in the presence of a representative of the quality control department of the supplier. The manufacturer shall also accept the welding filler materials in lots unless the manufacturer (including the third-party quality control representative authorized by the equipment purchaser) participates in the source verification of the welding material supplier’s tests.
3.3 The manufacturer shall draw up acceptance specifications for the filler materials. This document shall be drafted in accordance with the provisions of this standard and shall comply with the provisions of the technical qualification data sheet for welding materials when such qualification is required. The welding material acceptance specifications shall include, but are not limited to:
——welding processes,
——the welding procedure parameters,
——the interpass temperature and any prescribed post weld heat treatment,
——the basic drawing for sampling, and
——acceptance items, test methods and conformance criteria.
3.4 The filler material supplier shall carry out qualification for the welding filler materials to be assessed in accordance with NB/T 20002.4. After the welding material qualification data sheet is established, the manufacturer may conduct acceptance in lots.
3.5 Acceptance items and indices of welding filler metals are determined by their use in making strength welds, buttering, and cladding, seal and repair welds.
4 Designation of welding filler materials
Welding filler materials shall be identified by a conventional designation. The designations of Chinese national standards take precedence for this purpose, or alternatively or additionally, foreign designations AWS, AFNOR, JINS, DIN and others.
Reference to these standards does not mean that their technical provisions (particularly as regards dimensions) apply; they simply make it easier to name the products.
Foreword i 1 Scope 2 Normative references 3 General 4 Designation of welding filler materials 5 Dimensional characteristics 6 Definition of lots 7 Lot tests 8 Retest 9 Labeling 10 Acceptance report 11 The validity period of the product acceptance report 12 Data sheet of welding filler material
