Steel pipe tubing 89 x 6.5mm

The tubing steel pipe 89 x 6.5 mm is used for extracting liquid and gas from wells, for injecting water, compressed air (gas) and for performing various types of work on current and overhaul of wells. They are made of two types: with smooth ends and with outwardly upset ends, on which an external thread is cut, and a coupling is screwed onto one end. At a distance of 0.4 - 0.6 m from the end of the pipes, from the side of the couplings, a stamp is knocked out - marking. It indicates: conditional diameter of the pipe, mm; strength group of steel; wall thickness, mm; trademark; month and year of issue. Smooth pipes and couplings for them are made of steel of strength groups K, E, L, M, and pipes with upset ends are made of steel of strength groups D, K, E, L, M. The surface of their threads is coated with a lubricant that ensures the tightness of the connection and protects from scuffing and corrosion.

Clutchless pump-compressor pipes (NKB) ensure the tightness of joints at pressures up to 50 MPa. Their ends have a landing outside; the connection is very strong. The tightness of the joints is ensured by conical sealing surfaces located behind the thread on the side of smaller diameters. A trapezoidal thread is used in the pipe connection.

Coupling tubing (NKM) provides tightness of connections at pressures up to 50 MPa. The strength of the joints is up to 90% of the strength of the pipe body. A trapezoidal thread is used in the pipe connection.

Tubing pipes (tubing pipes) are used in the oil and gas industry. The tubing pipe is widely used in the construction of gas and oil wells, for the transportation of gaseous and liquid substances, as well as for repair and tripping. A distinctive feature of the operation of tubing is harsh operating conditions, the presence of constant mechanical loads and the interaction of aggressive media. Tubing pipes are exposed to constant erosion and corrosion.

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