1.Commodity: galvanized pipe 2.Certificate: SONCAP, SGS, CE, UL, COC, POVV, ... , including spiral steel pipe, schedule 40 galvanized steel pipe , rigid galvanized steel pipe ,electric galvanized pipe, pre-galvanized pipe, square and rectangular steel pipe, ... pressure liquids conveyance, such as water, gas, and construction4) Surface: Galvanized (inside & outside)5) Zinc coating: 300-400g/m26)Small ...