Large-diameter spiral welded steel pipe is a type of steel pipe that has been widely used in recent years. Its main features are large diameter, high strength, and suitable for long-distance transportation and high-pressure medium transportation. This article will introduce in detail spiral welding

Defects that are prone to occur in the submerged arc welding zone include pores, hot cracks, and undercuts.1. Bubbles. Bubbles mostly occur in the center of the weld bead. The main reason is that hydrogen is still hidden in the welded metal in the form of bubbles. Therefore, the measure to eliminate

As an important anti-corrosion steel pipe, hot-dip plastic-coated steel pipe has attracted much attention for its anti-corrosion performance.1. Manufacturing process: The manufacturing process of hot-dip plastic-coated steel pipes mainly includes surface treatment, preheating, spraying, and curing.

1. A galvanized steel pipe reacts molten metal with the iron matrix to produce an alloy layer, thereby combining the matrix and the coating. Hot-dip galvanizing is to pickle the steel pipe first. To remove the iron oxide on the surface of the steel pipe, after pickling, it is cleaned in an aqueous s

The following methods can slow down or prevent steel pipe corrosion:1. Adjust measures to local conditions: rationally select steel pipe building materials, and select different types of materials according to different transportation media and environmental conditions.2. Steel pipe plus DC power su

Corrosion of clean water pipes:Metal pipes account for 90% of my country's urban water supply pipelines. Whether they are cast iron or carbon steel pipes, corrosion, and scaling will occur during long-term operation. With the increase in service life, the corrosion in metal pipelines becomes more an

Annealing is to heat the cold-rolled precision bright steel pipe to an appropriate temperature, adopt different holding times according to the material and workpiece size, and then slowly cool it. The purpose is to make the internal structure of the metal reach or approach an equilibrium state and o

In daily life and engineering projects, stainless steel pipes are widely used as an important building material, but it is often difficult to distinguish different types of stainless steel pipes at a glance. The following will introduce several common stainless steel pipe model identification method

Seamless steel pipe extrusion is a commonly used pipe-making process, mainly used to produce seamless steel pipes of various specifications and materials. The principle is as follows:1. Material selection: First, select appropriate steel billets as raw materials. These steel billets are usually preh

Steel pipes are common materials in the construction and engineering fields, and 2205 duplex stainless steel pipes, as a special material, need to meet certain execution standards when used. 2205 duplex stainless steel pipe is duplex stainless steel with excellent corrosion resistance and mechanical