welded pipe sizes
Direct seam welded pipe production process is simple, high production efficiency, low cost, rapid development.The strength of spiral welded pipe is generally higher than that of straight welded pipe. The welded pipe with larger diameter can be produced with narrow blank, and the welded pipe with different diameter can also be produced with the same width of blank.However, compared with the same length of straight seam pipe, the weld length increases by 30~100%, and the production speed is lower.
It is also divided into general welded pipe, galvanized welded pipe, oxygen welded pipe, wire sleeve, metric welded pipe, idler pipe, deep well pump pipe, automobile pipe, transformer pipe, electric welding thin-wall pipe, electric welding special-shaped pipe, scaffold pipe and spiral welded pipe
General welding pipe: general welding pipe to transport low pressure fluid.Made of steel Q195A, Q215A and Q235A.It can also be made of other mild steels that are easy to weld.The steel pipe shall be tested for water pressure, bending, flattening, etc., which has certain requirements on the surface quality. Usually, the delivery length is 4-10m, and the delivery length is fixed (or multiple feet).The specification of welded pipe is expressed by the nominal diameter (millimeter or inch). The nominal diameter is different from the actual one. There are two kinds of welded pipe according to the specified wall thickness: ordinary steel pipe and thickened steel pipe.Galvanized steel pipe: to improve the corrosion resistance of steel pipe, the general steel pipe (black pipe) is galvanized.The galvanized steel pipe divides the hot dip galvanizing and the electric galvanizing two kinds, the hot dip galvanizing galvanizing layer thick, the electric galvanizing cost is low.