Serving the steel pipe industry for 20 years

Although chemical cleaning can make the appearance reach a certain degree of cleanliness and roughness, but its anchor lines are shallow and easily pollute the situation.Damage welding is to put two plastic-coated pipes directly in the non-destructive welding parts, and it can be directly welded by

Thick-walled straight seam steel pipe refers to a steel pipe whose outer diameter to wall thickness ratio is less than 20, which is called thick-walled straight seam steel pipe. Mainly used as petroleum geological drill pipe, petrochemical decomposition pipe, boiler pipe, bearing pipe, automobile, t

What are the characteristics and precautions of different specifications of high pressure flanges? Let us find out. Flanges are disc-shaped parts and are most common in pipeline engineering.Flanges are used in pairs and used in conjunction with matching flanges on the valve. In pipeline engineering,

Galvanized steel pipe connection method: threaded, welded.Roll groove connection(1) Cracking of roll groove weld1. Smooth the inner wall welding ribs of the pressure groove part of the nozzle to reduce the resistance of the rolling groove.2. Adjust the axis of steel pipe and rolling groove equipment

Summary of welded steel pipes on January 6: raw materials continue to support welded steel pipe prices stabilize and consolidateOn January 6, domestic welded steel pipe prices rarely adjusted. According to the monitoring data of Lange Steel Cloud Business Platform: The average price of 4-inch (3.75m

How to use the elbowAnalysis of the main reasons for the decline in quality of elbows and methods of attention:1. In pure bending, under the action of external force M, the outer arm wall of its neutral layer is thinned by tensile stress &1, and the inner side is under compressive stress. The result

Spiral steel pipes should be subjected to mechanical performance test, flattening test and flaring test before leaving the factory, and must meet the requirements of the standard. The quality inspection methods of straight seam steel pipes are as follows:1. Judging from the surface, that is, in appe

Galvanized steel pipes are divided into cold-galvanized steel pipes and hot-dip galvanized steel pipes. Cold-galvanized steel pipes have been banned, and the latter is also recommended by the state to be temporarily used. In the 1960s and 1970s, developed countries in the world began to develop new