The difference between welded steel pipe and seamless steel pipe:

First, the material is different

1, Welded steel pipe: welded steel pipe refers to the steel strip or steel plate bending deformation into a round, square shape and then welded into the surface of the joint of the steel pipe, welded steel pipe is the blank steel plate or strip steel.

2, Seamless steel pipe: made of a whole piece of metal, there is no seam on the surface of the steel pipe, called seamless steel pipe.

Two, different uses

1, welded steel pipe: can be used as water and gas pipe, big mouth straight seam welded pipe for high-pressure oil and gas transmission, etc.; Spiral welded pipe is used for oil and gas transmission, pipe pile, bridge pier, etc.

2, seamless steel pipe: used for petroleum geological drilling pipe, petrochemical cracking pipe, pot furnace pipe, bearing pipe, and automobile, tractor, and aviation with a high precision structural steel pipe.

Three, different classification

1. Welded steel pipe: according to different welding methods, it can be divided into arc welding pipe, high-frequency or low-frequency resistance welding pipe, gas welding pipe, furnace welding pipe, Bondi pipe, etc. According to its users, it is divided into general welded pipe, galvanized welded pipe, oxygen-blown welded pipe, wire casing, metric welded pipe, roller pipe, deep well pump pipe, automobile pipe, transformer pipe, electric welded thin-wall pipe, electric welded special-shaped pipe and spiral welded pipe.

2, seamless steel pipe: seamless pipe is divided into hot rolled pipe, cold rolled pipe, cold drawn pipe, extrusion pipe, pipe jacking, etc. According to the section shape, the seamless steel pipe is divided into round and irregular two kinds, irregular pipe has a square, oval, triangle, hexagonal, melon seed shape, and star shapes, with a variety of complex shapes.

If you buy seamless steel pipes, you still need to choose a reliable manufacturer. Cangzhou Shenlong Pipe has been built for more than 30 years and has strict quality requirements. It is a qualified supplier of CNPC and BP oil and can be trusted.