Our factory want to enlarge the capability of the square steel pipe ,in the last month ,we cost 2,000,000 usd to make a new product line ,this product line is The most advanced product line .the capability will increase 15000 tons every month . so Greatly enhanced our ability of square pipe .our sqaure steel pipe can include all size square product .

this is the table that we can produce .

Square hollow section tube (mm )				Rectangular steel tube (mm)
OD	WT	OD	WT	OD	WT	OD	WT
15*15	0.6--1.5	120*120	1.7—5.75	20*(25—50)	1.5-2.75	100*(150-300)	1.5-10
20*20	0.6—2.5	125*125	2.75-5.75	25*(40—50)	0.8-2.75	110*(110-140)	4.0-5.75
25*25	0.6—3.0	130*130	4.0—5.75	30*(40—60)	0.6-3.75	120*(140-160)	3.0-7.5
30*30	0.6—4.0	140*140	2.75-5.75	40*(50—150)	1.0-6.0	130*(160-200)	5.0-7.5
40*40	0.7—5.0	150*150	2.5-9.75	50*(70—150)	0.8-6.0	150*(200-300)	3.0-12
50*50	0.7-5.75	160*160	3.0-9.75	60*(80—180)	1.7-5.75	160*(160-250)	3.0-12
60*60	0.7-5.75	180*180	3.0-9.75	70*(120—200)	2.0-6.0	180*(250-350)	4.0-12
70*70	1.0-5.75	200*200	3.5-11.75	80*(100—200)	2.0-7.75	200*(250-400)	5.0-12
75*75	1.3-5.75	250*250	3.7511.75	90*(140—180)	3.0-4.75	220*220	5.0-12
80*80	1.3-5.75	300*300	4.75-11.75	The above is our popular size
90*90	1.5—5.75	350*350	7.75-11.75	We also can custom for ur requirement.
100*100	1.2—5.75	400*400	7.75-11.75	Black pipe are usually with anti-rust our black painting on surface