The main consumption principle of the so-called thick-walled welded pipe is that the large-caliber thick-walled welded pipe stops rolling above the recrystallization temperature, and the cold rolling is rolling at the recrystallization temperature. The reason why it is called thick-walled welded pipe is that the ratio of outer diameter to wall thickness of steel pipe is less than 20 to become thick-walled welded pipe. Mainly used for petroleum geological drilling pipes, cracking pipes for petrochemical industry, boiler pipes, bearing pipes and high-precision structural pipes for automobiles, tractors, aviation and so on.
1. The difference between thick-walled welded pipe and thin-walled welded pipe?
The biggest difference between thick-walled welded pipe and thin-walled welded pipe is the thickness of "wall thickness". Generally speaking, thin-walled welded pipe is cold-drawn technology, while thick-walled welded pipe is hot-rolled technology. If the unit of measurement is used to distinguish, it is generally believed that the thickness/diameter of thick-walled pipe is equal to 0.05, which is the watershed between thick-walled pipe and thin-walled pipe. Thin-walled steel tubes with wall thickness/diameter less than 0.05. Thick-walled steel pipes are larger. In terms of usage, thin-walled welded pipes are mostly used in pipes, while thick-walled welded pipes are mostly used in blanks of hollow parts. Pressure bearing and important pipeline application.
2. Relevant rules that thick-walled welded pipe should abide by in engineering application?
Firstly, when choosing and applying thick-walled pipe fittings in practice, it is necessary to abide by relevant regulations and rules in the standards, especially in places where pipelines such as highly or highly hazardous fluid medium, still medium and high-pressure gas are delivered. On these premises, the main basis of the use and operating conditions, such as pressure, temperature, fluid, etc., to determine the type of pipe fittings.
3. The main use of thick-walled welded pipe?
Thick-walled welded pipes are mainly used in tap water engineering, petrochemical industry, chemical industry, power industry, agricultural irrigation, urban construction. For liquid delivery: water supply and drainage. For gas delivery: gas, steam, liquefied petroleum gas. Used for construction: Pile driving pipe, bridge can be used for wharf, road, construction pipe and so on.