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Seamless Steel Pipe Economic Cross Section Steel

Edit:Ausin Pipeline Material & Equipment Co.,Ltd   Date:Sep 06, 2017

Seamless steel pipe is a hollow section, the surrounding no seam of the long steel. At present, the world's production of seamless pipe total of more than 110 countries, more than 1850 companies under more than 5100 production plants, which produce oil pipe in 44 countries, more than 170 companies under more than 260 plants. Seamless steel pipe is a hollow section, the surrounding no seam of the round, square, rectangular steel. Seamless steel pipe is made of steel ingot or solid tube through the perforated tube, and then made by hot rolling, cold or cold. Seamless steel pipe with a hollow section, a large number of pipes used for conveying fluid, steel and round steel and other solid steel compared to the same flexural strength, the weight is light, is an economic section of steel, widely used in manufacturing structure Parts and mechanical parts, such as oil drill pipe, car drive shaft, bicycle frame and steel construction scaffolding.

Seamless pipe is a kind of hollow section, the surrounding no seam of the long steel. At present, the world's production of seamless pipe total of more than 110 countries, more than 1850 companies under more than 5100 production plants, which produce oil pipe in 44 countries, more than 170 companies under more than 260 plants. Seamless steel pipe is a hollow section, the surrounding no seam of the round, square, rectangular steel. Seamless steel pipe is made of steel ingot or solid tube through the perforated tube, and then made by hot rolling, cold or cold. Seamless steel pipe with a hollow section, a large number of pipes used for conveying fluid, steel and round steel and other solid steel compared to the same flexural strength, the weight is light, is an economic section of steel, widely used in manufacturing structure Parts and mechanical parts, such as oil drill pipe, car drive shaft, bicycle frame and steel construction scaffolding.

Manufacturing method

According to the different production methods can be divided into hot-rolled tube, cold-rolled tube, cold-drawn tube, extrusion pipe.

1, hot-rolled seamless pipe is generally produced in the automatic rolling mill unit. The solid tube is inspected and cleared of surface defects, cut into the desired length, centered on the end face of the perforation of the tube, and then sent to the heating furnace for perforation on the piercer. In the perforation at the same time continue to rotate and forward, in the roll and the role of the head, the tube gradually formed inside the cavity, said capillary. And then sent to the automatic rolling mill to continue rolling. Finally, the whole machine is the whole wall thickness, the sizing machine to achieve the specifications. The use of continuous rolling mill production of hot-rolled seamless steel pipe is a more advanced method.

2, if you want to get smaller and better quality seamless pipe, must be cold-rolled, cold drawn or a combination of the two methods. Cold rolling is usually carried out on a two-roll mill where the steel pipe is rolled in a ring-shaped bore formed by a variable cross-section round hole and a stationary tapered head. The cold drawing is usually carried out on a single chain or double chain type cold drawn machine of 0.5 to 100T.

3, the extrusion method is about to heat a good tube placed in a closed extrusion cylinder, perforated rods and squeeze bar with the movement, so that extrusion from the smaller die hole extrusion. This method can produce smaller diameter steel pipe.

Seamless use

General use of seamless pipe by the ordinary carbon structural steel, low alloy structural steel or alloy structural steel rolling, the largest output, mainly used for conveying fluid pipe or structural parts.

2, according to the use of different sub-three supply: a, according to the chemical composition and mechanical properties of supply; b, according to the mechanical performance supply; c, according to the hydraulic test supply. According to a, b class supply of steel, such as for the use of liquid pressure, but also for water pressure test.

3, the special purpose of the seamless pipe with a seamless pipe, geological seamless pipe and seamless use of oil and so on.


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