SPECIFICATION

MATERIAL

STANDARD

OD(mm)

THICKNESS 
(mm)

Square Steel Pipe

Q195, Q215, Q235, Q345

BS EN10296,
BS EN39,
GB 5310-1995

15*15-600*600

0.6-20

Seamless Pipe

10#, 20#,45#, A53(A,B),
Q235, Q195, Q215, Q235

BS1387,
BS4568,
BS31,
GB/T 3901

22-530

2.5-30

Hot-dipped Galvanized
Steel Pipe

Q195, Q235, Q345

ASTM A53A,
BS1387-1985,
GB/T3091

20-355.6

0.6-12

ZN:200-350g/m2

Welded Tube

Q195, Q215, Q345, Q235

BS1387,
GB531O/1995,
GB3087/1999,
ASTMA106/2006,
ASTMA312/2001,
ASTMA53/2007

20-2620

10-219

ASTM A182/2001,
API5CT, API5L,
DIN1626