Welded steel pipes

No.

product name

size(mm)

od*wt

steel grade

standard

1

Spiral-seam steel pipes

219-1820*6-18

Q235,Q345B

GB/T9711.1-1997

API SPEC 5L

2

Electric resistance welding steel pipes

140-426*4.5-14

Q235,Q345,20#,

J55,X42-65

APISPEC5L GB/T3091-2001,

GB/T9711.1-1997

GB/T13793-92

3

galvanized welded steel pipe

15-200*2.8-6.0

Q235

ASTM A53-1996

BS1387-1985

DIN2440

GB/T3091-2001