Spiral steel pipe is a welded pipe made of strip steel coil as raw material, extruded at regular temperature, and welded by automatic double-wire double-sided submerged arc welding process. In the construction of spiral steel pipe (SSAW pipe), the quality of the joint directly affects the connection strength and sealing of the pipe. Here are some operating tips and key considerations for a seamless joint without misalignment.

Stainless steel pipe is a hollow long round steel, mainly widely used in petroleum, chemical, medical, food, light industry, mechanical instruments and other industrial pipelines and mechanical structural components. In addition, when the bending and torsional strength are the same, the weight is lighter, so it is also widely used in the manufacture of mechanical parts and engineering structures. It is also commonly used as furniture and kitchen utensils.

In order to prolong the service life of steel pipes (such as seamless pipes and welded pipes), steel pipes are usually galvanized. Galvanized steel pipe is divided into two types: hot-dip galvanizing and electric galvanizing. Hot-dip galvanizing has a thick galvanized layer, which has the advantages of uniform coating, strong adhesion and long service life.

Straight seam pipe (ERW pipe) refers to a welded pipe whose weld seam is parallel to the longitudinal direction of the steel pipe. The straight seam pipe is made by rolling a long steel strip of a certain specification through a high frequency welding unit and welding it with a straight seam

(1) Check the drilling machine, grooving machine and pipe cutting machine to ensure safe use.(2) Preparation of materials and tools, including pipes, steel tapes, wrenches, vernier calipers, spirit levels, lubricants, wooden hammers, scaffolding, etc.(3) Install the support and hanger of the pipe to be installed according to the design requirements.

Phosphating is a process in which chemical and electrochemical reactions form a phosphate conversion film, and the formed phosphate conversion film is referred to as a phosphating film. It can play a great role in improving the rust resistance of steel pipes (such as seamless steel pipes or welded pipes). When we are phosphating steel pipes, we should pay attention to the following five points: