High-pressure seamless steel pipes are actually high-pressure boiler steel pipes. Because they are commonly used in high-temperature, high-pressure boilers, they are also called boiler steel pipes. Although the names differ, they are essentially the same type of seamless steel pipe, and their manufacturing processes are largely the same. However, due to their special working environment, they have very high requirements for material selection. High-pressure seamless steel pipes primarily withstand specific temperatures and pressures of liquids, but the liquids they transport vary. Because of these different applications, the materials used in high-pressure seamless steel pipes will differ. So, what specific materials are used?
The manufacturing processes for seamless steel pipes are divided into hot rolling and cold drawing. Within the cold drawing process, there are two types of steel pipes: shaped steel pipes and round steel pipes. The same applies to high-pressure seamless steel pipes.
First, the hot rolling process of industrial high-pressure seamless steel pipes.
The overall process of hot rolling seamless steel pipes involves heating a round steel billet to a certain temperature, then piercing it. The next step is three-roll skew rolling, continuous rolling, or extrusion. Following this is pipe removal, sizing, cooling to form the billet tube, straightening, and finally a hydrostatic test. After marking, it is ready for warehousing.
Second, the cold drawing process of industrial high-pressure seamless steel pipes.
The round steel billet is heated to a piercing temperature and pierced. Then, it undergoes heading, annealing, pickling, and copper plating. The next step is cooling, which requires multiple cooling cycles. The resulting billet tube undergoes heat treatment and straightening, and again, a hydrostatic test before being marked and stored.
Third, some material information about high-pressure seamless steel pipes.
Because high-pressure seamless steel pipes refer to a class of seamless steel pipes, any steel pipe that can withstand high temperatures and pressures and uses seamless steel pipe manufacturing processes falls under this category. The only differences are in the material and the environments it can adapt to.
(1) Seamless steel pipes of model GB5310-2008, also known as high-pressure boiler steel pipes, are mainly used in boilers within power plants, such as high-pressure and high-temperature resistant steel pipes. The materials used in this type of steel pipe are 15CrMoG, 20G, and 12Cr1MoVG.
(2) Seamless steel pipes of model GB3087-2008 belong to the category of low- and medium-pressure boiler seamless steel pipes. Broadly speaking, this type of seamless steel pipe is also a type of high-pressure seamless steel pipe. This type of steel pipe is mainly used in industrial and domestic boilers for transporting low- and medium-pressure fluids. The materials used are No. 10 and No. 20 steel.
(3) Seamless steel pipes of model GB6479-2000 belong to the category of seamless steel pipes used in high-pressure fertilizer equipment, specifically for parts of fertilizer equipment that require the transport of high-pressure fluids. The materials used are 16Mn, 12Cr2Mo, 20, and 12CrMo.
(4) Seamless steel pipes of model GB3093-1986 are high-pressure seamless steel pipes specifically designed for use in diesel engines. They are primarily used for high-pressure fuel injection pipes inside diesel engines and are made of 20A material.
From the above types of high-pressure seamless steel pipes, it can be seen that they are used in boilers, chemical equipment, and engines. Of course, the materials of high-pressure seamless steel pipes used for different applications are significantly different. Therefore, when using high-pressure seamless steel pipes, please pay attention to the applicable environment of each type of steel pipe to avoid affecting the service life of the machine.
Threeway Steel is known as a professional supplier engaged in manufacturing and distributing a wide range of steel pipe, and our headquarter located the central part of China – Hunan and six associated factories throughout China.
Threeway Steel is known as a professional supplier engaged in designing, manufacturing and distribution of a wide range of steel products with the headquarter located the central part of China – Hunan and six associated factories throughout China.
Threeway Steel is known as a professional supplier engaged in designing, manufacturing and distribution of a wide range of steel products with the headquarter located the central part of China – Hunan and six associated factories throughout China.
Threeway Steel is known as a professional supplier engaged in designing, manufacturing and distribution of a wide range of steel products with the headquarter located the central part of China – Hunan and six associated factories throughout China.
Threeway Steel is known as a professional supplier engaged in designing, manufacturing and distribution of a wide range of steel products with the headquarter located the central part of China – Hunan and six associated factories throughout China.
