标准
API 5L PSL1/ PSL2,ASTM A252,EN10219,AWWA C200,ASTM A53等...
ASTM A 53
Gr。A、Gr B、Gr C、Gr.D
GB/T9711
L175, L210, L245, L290, L320, L360, L290, L320, L360, L390,
API 5L
A, B, X42, X46, X52, X56, X60, X65 X70
EN 10219
S235JR, S275JR, S355JR, S355JOH, S355J2, S420. ..
外直径
219.1mm - 4064mm (8 " - 160")