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Database: 189760 (25 Oct 2025)
NB/T 20450.5-2017 English PDF
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NB/T 20450.5-2017
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Alternative welding code for mechanical components of PWR nuclear islands Part 5: Examination of production welds
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Basic data
Standard ID
NB/T 20450.5-2017 (NB/T20450.5-2017)
Description (Translated English)
Alternative welding code for mechanical components of PWR nuclear islands Part 5: Examination of production welds
Sector / Industry
Energy Industry Standard (Recommended)
Classification of Chinese Standard
F69
Classification of International Standard
27.120.20
Word Count Estimation
31,356
Date of Issue
2017-04-01
Date of Implementation
2017-10-01
Quoted Standard
GB/T 3375; GB/T 5185; GB/T 19866; NB/T 20002.3; NB/T 20002.6; NB/T 20003.7; NB/T 20003.8; NB/T 20328.2; NB/T 20328.3; NB/T 20328.4; NB/T 20328.5; NB/T 20450.3; NB/T 20450.4; HAF 602
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 stipulates the non-destructive testing items, proportions, methods and acceptance criteria of welding bevels and finished welds in the manufacture and installation of nuclear island machinery and equipment of PWR nuclear power plants, as well as the setting and inspection of product welding witnesses, and the products of the manufacturer. Pre-service inspection and other requirements. This standard applies to the welding inspection of nuclear island machinery and equipment of pressurized water reactor nuclear power plants.