1.Commodity: galvanized pipe 2.Certificate: SONCAP, SGS, CE, UL, ... spiral steel pipe, schedule 40 galvanized steel pipe , rigid galvanized steel pipe ,electric galvanized pipe, pre-galvanized pipe, square and rectangular steel pipe, welded steel pipe, ERW pipe, etc ... , EN102193) Use: Used for low pressure liquids conveyance, such as water, gas, and construction4) Surface: Galvanized (inside & outside) ...