... ~720mm W.T:1.8 mm~30mm Zinc coating:above 100-300g/m2 We have all specifications of hot dip galvanized steel pipe ... the third party inspection.The detailed specifications of hot dip galvanized steel pipeLength3m-12mMaterialQ235,Q345,Q19StandardBS1387,GB/T8163-1999,GB/T8162-1999 ... and ERWUsagePetroleum,chemical,power,metallurgy,ship building,construction Hot dip galvanized steel pipe