GB/T 20490-2006

Abolished

Seamless and welded (except submerged arc-welded) steel tubes for pressure purposes - Ultrasonic testing for the detection of laminar imperfections

承压无缝和焊接（埋弧焊除外）钢管分层的超声检测

Standard Type
GBT
ICS
77.040.20
CCS
H26
Status
废止
Issue Date
2006-09-12
Implementation
2007-02-01
Responsible Dept
中国钢铁工业协会
Drafting Unit
N/A