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The atmosphere that causes decarburization on the surface of Q345B seamless steel tubes is mainly oxidizing gases such as oxygen, water vapor and carbon dioxide. When these oxidizing gases come into c...

ERW pipe process performance inspection: 1. Bending test: Bending test should be carried out on steel tubes with an outer diameter less than or equal to 50mm. The bending angle is 90°, the bending rad...

Usually manufacturers produce the following quality requirements for seamless steel tubes. 1. Chemical composition. Requirements for the contents of harmful chemical elements As, Sn, Sb, Bi, Pb and ga...

International standard for petroleum casing and tubing: API Spec 5CT Common steel grades for casing: J55 K55 N80 L80 C90 T95 P110 Q125 V150 Common steel grades for tubing: J55 N80 L80 C90 P110 In add...

Non-destructive testing is a method of non-destructive testing of seamless steel tube materials, workpieces or parts. So what is the method of non-destructive testing of seamless steel tubes? 1...

The oil casing is short-circuited. The reason for this phenomenon is internal mechanical failure, such as roller or shaft eccentricity, or excessive welding power, or other reasons. As the welding spe...

ERW high-frequency welded pipe is a hot-rolled coil that is formed by a forming machine. The skin effect and proximity effect of high-frequency current are used to heat and melt the edge of the tube b...

In addition to being used for oil extraction, the emergence of oil casing pipe can also be used as a pipeline for transporting raw materials. In order to enhance the quality of oil casing, every link ...

Seamless steel pipe is the steel pipe with the largest consumption and the highest demand. The production volume and the manufacturer are the largest steel pipe types. In many cases, the competition o...

The biggest difference between straight seam high frequency electric resistance welded pipe (ERW Steel Pipe) and seamless steel tube is that ERW has a weld, which is also the key to the quality of ERW...