... Nantong Sanzhong Pipeline Co., Ltdgreen house, garden tools,canopy, steel pipewe produce steel pipe,green house 1)WT: 0.9mm--20mm2)O ... personal requirement7)specification can be made to order8)strong frame with gutter system SIZEOutside Dia.of Black/Galvanized TubeThicknessUnit ... S0 - 32% (minimum).FLATTENING TEST WELD AT 90 DEGREES (COLD)a)For weld : Distance between the platens, measured under load ...