Hot (hot extrusion) 54 ~ 480mm total of 45 kinds of steel pipe diameter; wall thickness of 4.5 ~ 45mm total of 36 species. Cold drawn (rolled) steel pipe diameter 6 ~ 200mm total of 65 species; wall thickness of 0.5 ~ 21mm total of 39 species. C, inside and outside surfaces of steel pipes shall not have cracks, folding, crack, crack, rolled off, there is separation and scarring defects, these defects should be completely removed (except for tube machining), outside the wall and not after clearing diameter than the negative deviation. Whoever does not exceed the allowable negative deviation of the other minor surface defects do not cleared. Products according to national standard GB / T14976-2002 (fluid transport stainless steel seamless pipe), GB / T14975-2002 (structure seamless stainless steel), GB / T13296-91 (boiler, heat exchanger with stainless steel seamless pipe) stainless steel rails doors, decorative welding stainless steel pipe (GB / T 18705-2002) stainless steel rails decoration, architectural decorative stainless steel welded pipe (JG / T 3030-1995), have to undergo rigorous testing, in line with national standards of technical requirements Material 321 / 1Cr18Ni9Ti 304 / 0Cr18Ni9 310S / 0Cr25Ni20 316L / 00Cr17Ni14Mo2 301 304L 202 stainless steel rails, stainless steel rails, Billion-commerce provided by Tianjin Bao Bao Jie Shengda Trading Company. Bao Jie Tianjin Shengda Trading Company (www.sdbjsm.com) strong, credible, in Tianjin's daily hardware industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Shengda treasure-commerce and you hand into the brilliant, for a better future!