The spiral steel pipe feeds the strip into the welded pipe unit. After being rolled by multiple rollers, the strip is gradually rolled up to form a circular tube blank with open gaps. Adjust the reduction amount of the kneading roller to control the weld gap between 1~ 3mm, and make both ends of the welding joint flush. If the gap is too large, the nearby effect will be reduced, the eddy current heat will be insufficient, and the inter-crystal bonding of the weld will be poor, resulting in non-fusion or cracking.

Epoxy resin anti-corrosion steel pipe is a kind of steel pipe, and its surface coating is a two-component, high-solid coating with epoxy resin as the main agent. Widely used in drinking water tanks, water pipes, water tanks, etc.

In recent years, many cities in my country have built sewage treatment plants. Most of the water pipelines in urban sewage treatment projects are steel pipes laid underground. Corrosion problems are a major problem in sewage treatment projects. The quality and lifespan of buried water pipelines directly affect the entire project. Therefore, it is very important to prevent corrosion of buried pipelines in urban sewage treatment projects.

1. Inspection by physical methods: Physical inspection methods are methods that use some physical phenomena to measure or inspect. The inspection of internal defects in materials or workpieces generally uses non-destructive testing methods. Non-destructive testing includes ultrasonic testing, radiographic testing, penetrant testing, magnetic testing, etc.

Precision steel pipes and seamless steel pipes are two common steel pipe products on the market. They have some similarities, but there are also differences.

Determine the five characteristics of non-metallic inclusions in square and rectangular tubes

Generally speaking, the diameter of spiral steel pipe can be divided into outer diameter, inner diameter and nominal diameter. The outer diameter of a spiral steel pipe is represented by the letter D, followed by the outer diameter size and wall thickness.

The straightening of LSAW steel pipes is an important process in the production of straight seam steel pipes. Especially for API standard oil casings, oil and gas pipes, and special pipes for mechanical equipment that have higher quality requirements.

Galvanized steel pipes are divided into two categories - hot-dip galvanized steel pipes and cold-dip galvanized steel pipes. Cold-dip galvanized steel pipes are electro-galvanized steel pipes.

In our lives, we use many water pipes, and spiral steel pipes are one of them. What should we do if our spiral steel pipes get clogged when we use them?