Welded steel pipe, also known as welded pipe, is made of steel plate  or strip steel after crimping. The production process of welded steel pipe is simple, the production efficiency is higher, the cost is more lower, the product variety is getting richer, but the general strength is lower than seamless steel pipe.
Welded steel pipe according to the welding process is divided into furnace welded pipe, electric welding (resistance welding) pipe and automatic arc welding pipe, according to the welding form is divided into straight seam welded pipe and spiral welded pipe, according to the end shape is divided into round welded pipe and special-shaped (square, flat, etc.) welded pipe. According to usage, it is divided into general welded pipe, galvanized welded pipe, oxygen blown welded pipe, wire bushings, metric welded pipe, roller pipe, deep well pump pipe, automobile pipe, transformer pipe, thin-wall welded pipe, special-shaped welded pipe and spiral welded pipe. Because of the different welding methods, there are different methods of producing welded steel tubes. The application of welded pipe is mainly used in boilers, automobiles, ships, light construction structure of doors and Windows steel, furniture, various agricultural machinery, scaffolding, wire pipe, high-rise shelves, containers and so on.

Galvanized pipe is to make the molten metal react with the iron matrix to produce an alloy layer, so that the matrix and the coating are combined. Hot-dip galvanizing is to pickle the steel pipe first. In order to remove the iron oxide on the surface of the steel pipe, after pickling, it is cleaned in the tank of ammonium chloride or zinc chloride aqueous solution or mixed aqueous solution of ammonium chloride and zinc chloride, and then sent to the in the hot dip bath. Hot-dip galvanizing has the advantages of uniform coating, strong adhesion and long service life.

Spiral pipe, also known as spiral steel pipe or spiral welded pipe, is made of low carbon structural steel or low alloy structural steel strip rolled into a pipe billet at a certain angle of the spiral line (called the forming angle) and then the pipe seam is welded together, which can produce large diameter steel pipes from narrower strips of steel.

Spiral pipe, also known as spiral steel pipe or spiral welded pipe, is made of low carbon structural steel or low alloy structural steel strip rolled into a pipe billet at a certain angle of the spiral line (called the forming angle) and then the pipe seam is welded together, which can produce large diameter steel pipes from narrower strips of steel.

Spiral pipe, also known as spiral steel pipe or spiral welded pipe, is made of low carbon structural steel or low alloy structural steel strip rolled into a pipe billet at a certain angle of the spiral line (called the forming angle) and then the pipe seam is welded together, which can produce large diameter steel pipes from narrower strips of steel.

Spiral pipe, also known as spiral steel pipe or spiral welded pipe, is made of low carbon structural steel or low alloy structural steel strip rolled into a pipe billet at a certain angle of the spiral line (called the forming angle) and then the pipe seam is welded together, which can produce large diameter steel pipes from narrower strips of steel.

Spiral pipe, also known as spiral steel pipe or spiral welded pipe, is made of low carbon structural steel or low alloy structural steel strip rolled into a pipe billet at a certain angle of the spiral line (called the forming angle) and then the pipe seam is welded together, which can produce large diameter steel pipes from narrower strips of steel.

Spiral pipe, also known as spiral steel pipe or spiral welded pipe, is made of low carbon structural steel or low alloy structural steel strip rolled into a pipe billet at a certain angle of the spiral line (called the forming angle) and then the pipe seam is welded together, which can produce large diameter steel pipes from narrower strips of steel.

Stainless steel plate surface is bright and clean, with high plasticity, toughness and mechanical strength, acid, alkaline gas, solution and other media corrosion.It is an alloy steel that does not rust easily, but is not absolutely rust free.Stainless steel plate refers to the atmosphere, steam and water and other weak medium corrosion of steel plate, and acid steel plate is acid, alkali, salt and other chemical corrosion medium corrosion of steel plate.
Stainless steel pipe are light weight and are widely used in the manufacture of mechanical parts and engineering structures. Mainly used in petroleum, chemical, medical, food, light industry, mechanical instrumentation and other industrial pipelines and mechanical structural components