High-pressure seamless pipe is actually high-pressure boiler tube, because high-pressure seamless pipe is usually used in high-temperature and high-pressure boiler pipeline, so it is also known as the boiler tube, although the above two types of pipeline name is different, but in fact it is a kind of and belong to the category of seamless steel tubes, the production process is not different from the seamless steel tube. However, due to its special working environment, it has high requirements on material. High-pressure seamless pipe is mainly to assume a certain temperature and pressure of the liquid, but the transportation of the liquid is also divided into a variety of, because the use is not the same, so that the material of the high-pressure seamless pipe will be different, but what are the specific materials?

We know that the production process of seamless pipe is divided into two kinds of hot-rolled and cold-drawn, and in the cold-drawn process is divided into two kinds of tubes, shaped tube and round tube, so the high-pressure seamless pipe is also so.

Hot rolling process steps

The overall process of hot rolling, the round billet will be heated to a certain temperature, followed by piercing, the next step is the three-roll tilting, rolling or extrusion process, followed by de-tubing, sizing, followed by cooling to form a billet, straightening, and finally after hydrostatic testing, marking can be put into storage.

Cold drawing process

Or now the round billet is heated to a temperature that can be pierced, piercing treatment, followed by beating, annealing, pickling, copper-plating of these steps, the next step can be cooled, the need for a number of times to cool the billet formed after cooling but also after heat treatment and straightening, the same after the water pressure test Can be marked into the warehouse.

Some of the materials of high-pressure seamless steel pipe

Because the high-pressure seamless pipe refers to a class of seamless pipe, so as long as in this category can withstand high temperatures and high pressure, the use of the seamless pipe process of the pipe, are all belong to the high-pressure seamless pipe. Just different materials, can be adapted to different environments.

GB5310-2008 model seamless steel pipe, that is, the above-mentioned high-pressure boiler tube, but this model of high-pressure boiler tube is mainly used in power stations within the boiler, such as high-pressure and high-temperature resistant pipeline, etc., this type of pipe using the material 15CrMoG, 20G, 12Cr1MoVG.

GB3087-2008 model seamless steel pipe, as long as it can withstand high temperature and high pressure, using seamless pipe technology belongs to the high-pressure seamless pipe. 2008 model seamless steel pipe, belongs to the category of low and medium pressure boiler seamless steel pipe, widely said that this kind of seamless steel pipe is also a kind of high pressure seamless pipe. This type of steel pipe is mainly used in industry and the life of the boiler in some transportation of low pressure fluid pipeline, the use of the material for the 10, 20 steel.

GB6479-2000 model seamless steel pipe, belongs to the seamless pipe used in high-pressure fertilizer equipment, is used in fertilizer equipment needs to transport high-pressure fluid part, the use of materials for the 16Mn, 12Cr2Mo, 20, 12CrMo.

GB3093-1986 model seamless steel pipe, is dedicated to high-pressure diesel engines, mainly used in diesel engines. Seamless pipe, mainly used for high-pressure injection oil pipe inside the diesel engine, the material used is 20A.

From the above models of high-pressure seamless pipe seems to be used in boilers, chemical equipment, and with the engine, of course, different use of high-pressure seamless pipe material is obviously different, so in the use of high-pressure seamless pipe, please pay attention to the application of the environment of each type of pipeline, so as to avoid the machine's The material of high pressure seamless pipe is different.