Schedule 40 pipe refers to the nominal wall thickness, not the grade.

This article mainly introduces six measures to prevent welded pipe leakage.

black mild steel pipe has many uses, you can use it according to actual needs.

In 1902, Mr. Tryggve Larssen, the chief engineer of Germany, developed and produced the world's first U-shaped cross-section riveted and interlocking steel sheet pile in Bremen.

According to the usage requirements of octg casing, select the appropriate welding method.

According to the function of steel casing pipe, it can be divided into surface casing, technical casing and oil layer casing.