Outer Diameter

/O.D/mm

20mm*20mm

 - 500mm*500mm

Wall Thickness

/W.T/mm

1.0-17.75

Section Shape

Square

Standard

ASTM A53, 

API5L GR.B,

DIN2440,

GB,BS3604,

DIN EN10219

Grade

Q195-Q345/S235/

S275/S355/16Mn/

20#/45#,/20MN2/

SS41/A36/A35/

ST37/ST35

Special Pipe

Thick Wall Pipe

Type

Welded

Welded Line Type

Longitudinal 

Alloy Or Not

Non-alloy

Secondary Or Not

Non-secondary

Product

W.T S235 / S275 / S355 Square Electric Resistance Welded Pipes  For Building, Bridge, Roof

Specification/mm

W.T/mm

Length/m

20*20

1.0,1.3,1.4,1.5,1.7,2.0

5.8 -11.8 

or according

 the customers’ 

requirement

25*25

1.3,1.4,1.5,1.7,1.8,2.0,2.2,2.5-3.0

30*30

1.3,1.4,1.5,1.7,1.8,2.0,2.2,2.5-3.0

40*40

1.3,1.4,1.5,1.7,1.8,2.0,2.2,2.5-4.0,4.25-5.0,5.25-6.0

50*50

1.3,1.4,1.5,1.7,1.8,2.0,2.2,2.5-4.0,4.25-5.0,5.25-6.0

60*60

1.3,1.4,1.5,1.7,1.8,2.0,2.2,2.5-4.0,4.25-5.0,5.25-6.0

70*70

1.3,1.4,1.5,1.7,1.8,2.0,2.2,2.5-4.0,4.25-5.0,5.25-6.0

75*75

1.3,1.5,1.7,1.8,2.0,2.2,2.5-4.0,4.25-5.0,5.25-5.75

80*80

1.3,1.5,1.7,1.8,2.0,2.2,2.5-4.0,4.25-5.0,5.25-5.75

100*100

1.5,1.7,1.8,2.0,2.2,2.5-5.0,5.25-6.0,6.5-7.75,9.5-13

120*120

2.5-2.75,3.0-4.0,4.25-6.0,6.5-7.75,9.5-15

130*130

2.5-2.75,3.0-4.0,4.25-6.0,6.25-7.75,9.5-15

135*135

2.5-2.75,3.0-4.0,4.25-6.0,6.25-7.75,9.5-15

140*140

2.5-2.75,3.0-4.0,4.25-6.0,6.25-7.75,9.5-15

150*150

2.5-2.75,3.0-4.0,4.25-6.0,6.25-7.75,9.5-15

160*160

2.5-3.75,4.5-5.0,5.25-7.75,9.5-15

180*180

2.5-3.75,4.5-5.0,5.25-7.75,9.5-15

200*200

3.0-3.25,3.5-5.75,7.5-7.75,9.5-12.5,12.75-15.75

250*250

4.5-5.75,7.5-11.75,12.5-14.75,15.5-17.75

300*300

4.75-5.75,9.5-11.75,12.5-14.75,15.5-17.75

350*350

4.75-5.75,9.5-11.75,12.5-14.75,15.5-17.75

400*400

4.5-5.75,7.5-11.75,12.5-13.75,14.5-14.75,15.5-17.75