GB/T3091,GB/T9711 API5L 5CT, ASTM ,德標DIN,日標JIS,英標BS,歐盟、SY/T5037 材質:Q195-Q345A,B,L175-L485,x42-X70,J55,規格:ERW直縫鋼管φ114.3mm- φ457.2mm SSAW螺旋鋼管ф219mm-ф3000mm 壁厚:2.7mm-15.75mm ,螺旋鋼管最大壁厚25mm