Oil country pipe, also known as oil special pipe, is the basic casing, oil pipe and drill string components (drill pipe, drill collar, kelly, etc.) of the petroleum industry. Collectively called oil country pipe (OCTG), it is a series of seamless pipe products.

Thin-walled stainless steel seamless pipes refer to stainless steel pipes with a ratio of wall thickness to outer diameter not greater than 6%. Mainly used for building water supply pipes.

Wear-resistant steel pipe is a steel pipe made of steel plate or steel strip after crimping and welding. The production process of the wear-resistant pipe is simple, the production efficiency is high, the variety and specifications are many, and the equipment capital is low, but the general strength is lower than that of the seamless steel pipe.

The initial impact property reflects the ability of the material to resist impact load. The practical significance of the impact toughness index is to reveal the brittle tendency of the material, which is generally measured by impact tests.

Hydraulic test is a method to detect the defects of SSAW steel pipe, which is widely used in the inspection of various pressure steel pipes.When the steel pipe is subjected to the hoop tensile stress during the hydrostatic pressure test, if the performance of the steel pipe does not meet the requirements or has defects, it will bend, crack, crack and release pressure under the action of the tensile stress, fully exposing the defects.

The seamless pipe is transported by a special trailer with a length of 18m. The trailer is covered with 100mm×200mm wooden squares, and the wooden squares are covered with rubber cushions or straw bags. The thickness is not less than 10mm and the width is not less than 300mm.