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Database: 189760 (25 Oct 2025)
NB/T 20450.1-2017 English PDF
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NB/T 20450.1-2017
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Alternative welding code for mechanical components of PWR nuclear islands Part 1: General requirements
Obsolete
NB/T 20450.1-2017
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Basic data
Standard ID
NB/T 20450.1-2017 (NB/T20450.1-2017)
Description (Translated English)
Alternative welding code for mechanical components of PWR nuclear islands Part 1: General requirements
Sector / Industry
Energy Industry Standard (Recommended)
Classification of Chinese Standard
F69
Classification of International Standard
27.120.20
Word Count Estimation
6,645
Date of Issue
2017-04-01
Date of Implementation
2017-10-01
Quoted Standard
GB/T 3375; GB/T 12467.2-2009; NB/T 20450.2; NB/T 20450.3; NB/T 20450.4; NB/T 20450.5; HAF 602; HAF 603
Regulation (derived from)
National Energy Board Bulletin 2017 No. 7; Industry Standard Filing Announcement 2017 No. 9 (Total No. 213)
Issuing agency(ies)
National Energy Administration
Summary
This standard specifies the general requirements for the welding of nuclear island machinery and equipment for pressurized water reactor nuclear power plants. Includes requirements for general rules, personnel, production equipment, marking and traceability, specimens, rating joints, and preservation of product weld witnesses. This standard applies to the welding and surfacing of carbon steel, low alloy steel, austenitic stainless steel and nickel base alloy of nuclear island machinery and equipment of pressurized water reactor nuclear power plant.