Selection of anticorrosive coatings for steel pipesThere are many types of anti-corrosion coatings, and their properties and uses are different. The correct selection is very important to the anti-corrosion effect and service life of the coating. When choosing:1. The nature of the surface material o

The high-frequency welding process of submerged arc steel pipe1. Control of the weld gap:After rolling by multiple rollers, the strip steel is sent to the welded pipe unit. The strip steel is gradually rolled up to form a round tube blank with a tooth gap. Adjust the pressing amount of the squeeze r

Longitudinally welded pipe maintenance collectionThe longitudinal welded pipe has a simple production process, high production efficiency, low cost, and rapid development. The strength of spiral welded pipes is generally higher than that of straight seam welded pipes. A narrower blank can be used to

The purpose of preheating the spiral steel pipe before welding(1) Preheating can slow down the cooling rate after welding, make hydrogen diffuse and escape in the weld metal, and avoid cracking caused by hydrogen. It can also reduce the degree of hardening of welds and heat-affected zones, and impro