ASTM A139 Grade B welded steel pipe/tube
 

ASTM A139 specification covers five grades of electric-fusion (arc)-welded straight-seam or helical-seam steel pipe.

A139 Grade B welded pipe/tube is intended for conveying liquid, gas, or vapor.

The size of ASTM A139 Grade B steel pipe/tube

ERW; outer diameter:21.3-660mm thickness:6-25mm
LSAW; outer diameter:325-1524mm thickness:6-50mm
SSAW: outer diameter:219-3200mm thickness:5-25mm

A
The table below gives the computed minimum values.
B
For wall thicknesses1
⁄2in. (12.7 mm) and greater, the elongation may be taken in 8 in. (203.2 mm).
C
The elongation in 8 in. (203.2 mm) need not exceed 30 %.