Advantages and disadvantages of hot-dip galvanized steel pipe Hot dip galvanized steel pipe is the strip or plate bending by the spiral bending forming, with double-sided submerged arc automatic welding in the welding seam and seam made of galvanized steel pipe, for the following reason it can be w

Before installing the steel pipe, the trench needs to be dug, and the soil dug after the trench has a reasonable stacking place, the excavated earth should be transported to the outside in time, and should not be too close to the trench, there must be two The distance above the meter, so as not to a