cold forming square pipe: 1) Thickness:0.5-60mm 2) Outer ... 2~11.8m 4) Material:Q195,Q cold forming square pipe 1.size:10*10mm-600*600mm2.thickness:0. ... .8m4. High Quality: ISO900:2000, API5L, API5CL Product square steel pipesStandardGB/T3091-2001,BS1387,ASTM A53, ASTM A106, ... .Surface1. Bared , oiled , black painted or as customers’request2. Painting, caps, beveled edges, plain end,making, tread , or as ...