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Database: 189759 (19 Oct 2025)
JB 4420-1989 English PDF
Standard ID
Contents [version]
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Standard Title (Description)
Status
PDF
JB 4420-1989
English
RFQ
ASK
6 days [Need to translate]
(Boiler welding procedure qualification)
Obsolete
JB 4420-1989
PDF similar to JB 4420-1989
Standard similar to JB 4420-1989
GB/T 16507.2
GB/T 16507.1
GB/T 12145
Basic data
Standard ID
JB 4420-1989 (JB4420-1989)
Description (Translated English)
(Boiler welding procedure qualification)
Sector / Industry
Mechanical & Machinery Industry Standard
Classification of Chinese Standard
J98
Word Count Estimation
30,383
Date of Issue
3/27/1989
Date of Implementation
1/1/1990