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Do you know Seamless Carbon Tubing?

Jan. 03, 2020

Seamless Carbon Tubing is made of steel ingots or solid tube blanks through perforation to make capillaries, and then hot rolled, cold rolled or cold drew. Seamless carbon steel pipe plays an important role in China's steel pipe industry. According to incomplete statistics, there are about 240 seamless carbon steel pipe production enterprises in China, about 250 sets of seamless carbon steel pipe units, and an annual output capacity of about 4.5 million tons. In terms of caliber, those with <φ76 account for 35%, and those with <φ159-650 account for 25%. In terms of variety, 1.9 million tons of general-purpose pipes, accounting for 54%; 760,000 tons of petroleum pipes, accounting for 5.7%; 150,000 tons of hydraulic props and precision pipes, accounting for 4.3%; stainless steel, bearing tubes, and automotive pipes totaling 50,000 Tons, accounting for 1.4%.

Seamless Carbon Tubing

Seamless Carbon Tubing

The raw material of the seamless carbon steel pipe is a round pipe blank. The round pipe blank is processed by a cutting machine into a billet with a length of about 1 meter and is sent to a furnace for heating by a conveyor belt. The billets are sent to a furnace for heating to a temperature of about 1200 degrees Celsius. The fuel is hydrogen or acetylene. Furnace temperature control is a key issue. The round tube blanks are pierced through a pressure perforator after they come out of the furnace. Generally, the more common punching machine is a tapered roller punching machine. This punching machine has high production efficiency, good product quality, large perforation diameter expansion, and can wear various steel types. After perforating, the round tube blank is successively rolled by three rolls, continuously rolled or extruded. After extrusion, sizing is required. The sizing machine rotates into the steel embryo to drill holes at high speed through a conical drill to form a steel pipe. The inner diameter of the steel tube is determined by the outer diameter of the drill of the sizing machine. After sizing, the steel pipe enters the cooling tower and is cooled by water spray. After cooling, the steel pipe is straightened. After being straightened, the steel pipe is sent by a conveyor belt to a metal flaw detector (or hydrostatic test) for internal flaw detection. Problems such as cracks and bubbles inside the steel tube will be detected. After the quality inspection of the steel pipe, it must be strictly selected by hand. After the quality inspection of the steel pipe, spray paint with the number, specifications, production batch number, etc. And lifted into the warehouse by a crane.

As a Seamless Carbon Tubing Supplier, share with you the manufacturing process.

1. Hot rolling: round pipe billet → heating → perforation → three-roll oblique rolling, continuous rolling or extrusion → stripping → sizing (or reducing) → cooling → straightening → hydraulic test → mark → storage

The raw material for rolling seamless pipes is round pipe blanks. Round pipe blanks are cut by a cutting machine into billets with a length of about 1 meter and then sent to the furnace for heating by a conveyor belt. The billets are sent to a furnace for heating to a temperature of about 1200 degrees Celsius. The fuel is hydrogen or acetylene. Furnace temperature control is a key issue. After the round tube billet is discharged, it is pierced through a pressure perforator. Generally, the more common punching machine is a tapered roller punching machine. This punching machine has high production efficiency, good product quality, large perforation diameter expansion, and can wear various steel types. After perforating, the round tube blank is successively rolled by three rolls, continuously rolled or extruded. After extrusion, sizing is required. Our company also has Seamless Steel Pipe on sale, welcome to consult.


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