... varies of sizes of steel pipes, including spiral steel pipe, hot dipped galvanized pipe, galvanized steel pipe size ,electric galvanized pipe, pre-galvanized pipe, square and rectangular steel pipe, welded steel pipe, ERW pipe, etc. These pipes ... ASTM A53, EN102193) Use: Used for low pressure liquids conveyance, such as water, gas, and construction4) Surface: Galvanized (inside & outside)5) Zinc ...