 
		    
			Application:
Construction / building materials steel pipe
Structure pipe
Fence post steel pipe
Solar mounting components
Handrail pipe
| Product | Square and Rectangular Steel Pipe | 
| Material | Carbon Steel | 
| Grade | Q195 = S195 / A53 Grade A Q235 = S235 / A53 Grade B / A500 Grade A / STK400 / SS400 / ST42.2 Q355 = S355JR / A500 Grade B Grade C | 
| Standard | DIN 2440, ISO 65, EN10219, GB/T 6728, JIS G3444 / G3466, ASTM A500, A36 | 
| Surface | Bare / Natural Black Painted Oiled with or without wrapped | 
| Ends | Plain ends | 
| Specification | OD: 20*20-500*500mm ; 20*40-300*500mm Thickness: 1.0-30.0mm Length: 2-12m | 

 
		    
			| Specifications of Carbon Black Square and Rectangular Pipes | ||||||||
| Standards:ASTM A500、GB/T6728-2002、EN10219、EN10210、JIS G3466 | ||||||||
| Size | Size | Thickness | Size | Size | Thickness | Size | Size . | Thickness | 
| 19*19 | 20*20 | 1.0 | 30*100 40*70 40*90 50*60 50*75 50*90 55*55 65*65 | 40*80 40*100 50*70 50*80 60*60 60*80 70*70 | 13 | 60*170 70*160 80*150 80*180 127*127 | 75*150 100*200 140*140 150*150 130*130 | 2.5 2.75 3.0~5.75 7.5~9.75 | 
| 1.2 | 1.4 | |||||||
| 1.3 | 1.5 | |||||||
| 1.4 | 1.7 | |||||||
| 1.5 | 1.8 | 10.5~11.75 12.5~15 | ||||||
| 1.7 | 2.0 2.2 | 60*200 60* 220 80*200 80*220 100*180 120*160 120*200 | 100*250 160*160 1 80*180 140* 180 150*170 150*180 150*200 | 2.5 2.75~3.25 | ||||
| 2.0 | 2.5-4.0 4.25~5.0 5.25~5.75 5.75-6.0 | 3.5~5.0 5.25~7.75 | ||||||
| 25*25 20*30 | 1.0 | 9.5~11.75 12.5~15.75 16--30 | ||||||
| 1.2 | ||||||||
| 1.3 | 40*120 40*140 50*110 50*120 50*125 70*100 85*85 | 50*100 60*90 60*100 60*120 75*75 80*80 90*90 | 1.3 | 100*350 125*250 130*250 135*135 140*240 150*220 225*225 | 100*300 1 50*250 200*200 200*250 | 2.75 3.0~3.25 3.5~9.75 11.5~11.75 | ||
| 1.4 | 1.5 | |||||||
| 1.5 | 1.7 | |||||||
| 1.7 | 1.8 2.0 | 12.5~14.75 | ||||||
| 1.8 | 2.2 | 15.5~15.75 | ||||||
| 2.0 | 2.5~4.0 4.25~5.0 5.25~5.75 7.5~9.75 | 16~30 | ||||||
| 2.2 | 100* 400 130*300 1 50*350 200*280 220*220 | 1 50*300 200*300 250*250 180*300 | 3.5~4.0 . 4.5~7.75 | |||||
| 2.5~3.0 | 40*135 50*1 40 60*130 75*125 | 50*150 60*1 40 80*120 100*100 | 1.5 | 9.5~11.75 12.5~14.75 15.5~17.75 | ||||
| 32*32 35*35 20*50 | 20*40 25*40 30*30 30*40 | 1.0 | 1.7 | |||||
| 1.2 | 2.0 2.2 2.5~5.0 5.25-6.0 6.5~9.75 | |||||||
| 1.3 | 200*350 250*350 | 200*400 300*300 | 4.75~11.75 | |||||
| 1.4 | 12.5~14.75 15.5~17.75 | |||||||
| 1.5 | ||||||||
| 1.7 1.8 | 300*320 300*350 | 200*500 250*450 300*400 350*350 | 4.75~11.75 | |||||
| 2.0 | 11.5~16 | 12.5~14.75 15.5~17.75 | ||||||
| 2.2 2.5~3.0 3.5~3.75 | 50*160 60*150 60*180 65*180 70*150 90*150 90*160 100*120 100*125 100*140 | 60* 160 80*140 80* 160 100*150 120*120 110*110 120*180 125*125 | 2.5 2.75 | 18--30 | ||||
| 20*60 20*80 25*65 30*70 35*60 38*38 45*45 | 25*50 30*50 30*60 40*40 40*50 40*60 50*50 | 1.2 | 200*450 250*400 250*500 300*450 | 200*600 280*280 300*500 350*400 | 4.5~5.75 | |||
| 1.3 1.4 | 3.0~4.0 | 6.5~11.75 12.5~14.75 15.5~17.75 | ||||||
| 1.5 | 4.25~4.75 5.25~6.0 6.5~7.75 | |||||||
| 1.7 | 18--30 | |||||||
| 1.8 | 300*700 300*650 320*320 | 300*600 400*500 400*600 450*450 500*500 | 4.5~7.75 9.5~9.75 11.5~13.75 | |||||
| 2.0 2.2 | 9.5~9.75 | |||||||
| 2.5~4.0 | 10.5~11.75 | 14.5~15.75 16.5~17.75 | ||||||
| 4.25~5.0 5.25~5.75 5.75~6.0 | 12.5~15.75 | |||||||
| 16--30 | 18~30 | |||||||
Strict Quality Control:
1) During and after production, 4 QC staffs with more than 5 years experience inspect products in random.
2) National accredited laboratory with CNAS certificates
3) Acceptable inspection from third party appointed/paid by buyer, such as SGS, BV.
4) Approved by Malaysia, Indonesia, Singapore, Philippines, Australia, Peru and UK. We own UL /FM, ISO9001/18001, FPC certificates



About us:
Tianjin Youfa was founded on July 1st, 2000. There are totally about 9000 employees, 11 factories, 193 steel pipe production lines, 3 national accredited laboratory, and 1 Tianjin government accredited business technology center.
31 square and rectangular steel pipe production lines 
Factories:
Tianjin Youfa Dezhong Steel Pipe Co.,Ltd;
Handan Youfa Steel Pipe Co.,Ltd;
Shanxi Youfa Steel Pipe Co., Ltd
  











