Insulation steel pipe is a steel pipe that is processed by heat preservation technology, and under the action of different working environments and external media, the internal temperature and surface temperature of the working steel pipe are guaranteed to meet or meet the requirements of use. Insulation pipes are widely used in liquid and gas transportation pipe networks, chemical pipe insulation engineering petroleum, chemical industry, central heating heating network, central air conditioning ventilation pipes, municipal engineering, etc.

False welding is a common welding defect of welded pipes. It seems that the front and rear steel strips are welded together during welding, but in fact they are not integrated, and the strength of the joint surface is low. The welding seam has to go through a complicated process, especially in the high-temperature furnace area and the high-tension tension-leveling area. The weld seam that is weakly welded is likely to cause a broken belt accident, which will affect the normal operation of the production line.

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