What is the difference between carbon steel pipe and seamless steel pipe

Released on Dec. 11 , 2019

China carbon steel pipe factory share with you: with the development of society, steel production is increasing and the demand is increasing.Therefore, the development of modern cities is impossible without carbon steel pipes.Carbon steel pipe is widely used, such as electrified high-speed railway, substation, communication facilities are used in many aspects.So many steel materials, but carbon steel pipe to which category?What is the difference between carbon steel pipe and seamless steel pipe? How to divide carbon steel pipe.In fact, carbon steel pipe is mainly determined by its carbon content.The following classification is made according to the number of carbon positions in carbon steel pipes. Low carbon steel pipe - carbon content is approximately less than 0.25%. Carbon steel pipes with a design pressure of less than 10MPa in oil products, oil gas and common media -- carbon content is approximately 0.25 ~ 0.Between 60%, such as 35, 45 steel, etc.;High carbon steel pipe - carbon content greater than 0.60%. This type of steel is generally not used in the manufacture of steel pipes.Carbon steel pipes contain certain elements of carbon, as well as silicon and manganese.Contains no other alloying elements.Note that the silicon content is generally less than 0.40%.In order to ensure the chemical composition and mechanical properties of carbon steel pipe, we must control the content of impurities such as sulfur and phosphorus below 0.035%, so as to produce high-quality carbon steel pipe.


Carbon steel pipe 

Carbon steel pipe and seamless steel pipe

First. Different properties

1, carbon steel pipe: is made of iangot or round solid steel perforated into capillary, and then made by hot rolling, cold rolling or cold pull-out.

2. Seamless steel pipe: steel pipe made of whole metal with no joints on the surface.

Second, different characteristics

1. Carbon steel pipe: carbon steel pipe is divided into hot rolled and cold rolled (drawn) steel pipe.Hot rolled carbon steel pipe into general steel pipe, low and medium pressure boiler steel pipe, high pressure boiler steel pipe, alloy steel pipe, stainless steel pipe, petroleum cracking pipe, geological steel pipe and other steel pipe.

2. Seamless steel pipe: according to the production method, the seamless pipe can be divided into hot-rolled pipe, cold-rolled pipe, cold-drawn pipe, extrusion pipe, jacking pipe, etc.According to the section shape, the seamless steel pipe is divided into circular and irregular two kinds, irregular pipe is square, oval, triangle, hexagon, melon seed, star, with a variety of complex shapes of fin pipe.The maximum diameter is 650mm and the minimum diameter is 0.3mm.

Seamless steel pipe is made by hot - rolling perforated steel pipe without welds.Sometimes it is necessary to further cold process the hot machined pipe, in order to obtain the corresponding shape and size.The carbon steel pipe is generally made for round, square, flat and other shapes by multi-rolling.Seamless steel pipe is the most widely used pipe in petrochemical plant nowadays.Carbon steel pipe is more widely used.

At the same time, carbon steel pipe is the main requirement of its chemical composition is the content of carbon, seamless steel pipe is a large type, refers to the seamless steel pipe, a wide range.

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