NB/T 20002.2-2013Welding Code for Mechanical Components of PWR Nuclear Islands - Part 2: Acceptance for Welding Filler Materials (English PDF)

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.

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.