Causes and preventive measures of single-sided undercut:In the production process of submerged arc welded steel pipes, especially in high-speed welding, the undercut has become the main defect in the production process of spiral submerged arc welded steel pipes. The defect of undercut mainly has the

Large-diameter steel pipes are also called large-diameter galvanized steel pipes, which refer to welded steel pipes with hot-dip or electro-galvanized layers on the surface of large-diameter steel pipes. Galvanizing can increase the corrosion resistance of steel pipes and prolong their service life.

1. Mainly use wire brushes and other tools to polish the steel surface. The cleaning and preheating of spiral welded steel pipes can remove loose or raised scales, rust, welding slag, etc. Hand tool de-rusting can reach the Sa2 level, and power tool de-rusting can reach the Sa3 level. If the iron ox

A detailed explanation of the welding process of large diameter straight seam steel pipe:Double-wire automatic welding of straight seam steel pipe is a welding technology developed in recent years. In addition to the characteristics of semi-automatic single-wire welding, it also has welding characte

1. Rolling method: Stainless steel pipe bending generally does not require a mandrel, and is suitable for the inner round edge of thick-walled stainless steel pipes.2. Roller method: place a mandrel in the stainless steel tube, and push the outside with a roller at the same time.3. Stamping method:

There are two main differences between oil casing and oil drill pipe: 1. Different uses; 2. Different materials.Oil casing is a steel pipe used to support the walls of oil and gas wells to ensure the normal operation of the entire oil well after the drilling process and completion. Each well uses se

After a series of treatments such as forming, welding, and cooling, the spiral steel pipe still needs to be sawed. In this link, the length of the technical spare ruler directly affects the quality and sales of the finished welded pipe, so the length of the spare ruler should be controlled between (

Steel elbow: the most commonly used is the seamless steel elbow, which is divided into a long-radius elbow and a short-radius elbow. Among them, the long-radius elbow is the most commonly used, and its application is also very extensive.Steel elbows are distinguished according to specifications: sma

1. It completely solves the problem of mutual friction between the closed surfaces of traditional connecting steel pipes and affects the sealing; the flow resistance is small, and the resistance coefficient of the stainless steel tee is equal to that of the steel pipe section of the same length;2. T

The resistance of the fluid is responsible for the energy loss (ie drag loss). One is the resistance loss along the way caused by the viscosity and inertia of the fluid; the other is the local resistance caused by the blockage and disturbance of the solid wall to the fluid due to the sudden expansio