Application of straight seam steel pipes in pressure pipelines

The nominal diameter of straight seam steel pipe refers to the series of diameters specified in the standard for straight seam steel pipes. For straight seam steel pipes, pipe fittings, valves, etc., the nominal straight seam steel pipe diameter is represented by the series specified in the standard. The components of straight seam steel pipes used for transporting fluid adopt the nominal diameter series. China's straight seam steel pipe standards use nominal diameters expressed as integers in millimeters (mm). The working pressure of straight seam steel pipe refers to the pressure that pipes, pipe fittings, valves, and other pipeline components bear under normal operating conditions. The design pressure of straight seam steel pipe refers to the pressure that the pipeline is subjected to under relatively harsh conditions in the combination of the set temperature and the corresponding design temperature during normal operation. As for the specific content of the straight seam steel pipe pressure pipeline, we will introduce the specific content below:

1. Definition of straight seam steel pipe pressure pipe
By definition, straight seam steel pipes should include all straight seam steel pipes that use pressure to transport gas or liquid. From the point of view of production, it follows the name of a straight seam steel pipe pressure vessel, so it is not a pressure pipeline in a simple sense. The possibility of accidents and the harmfulness of accidents define the scope of straight seam steel pipe pressure pipes. my country (Decree No. 373 of the State Council) has clarified the scope of straight seam steel pipe pressure pipes and stipulated the definition of straight seam steel pipe pressure pipes. The pressure used in pressure pipes, tubular equipment used to transport gas or liquid, as a liquid medium with a temperature higher than or equal to the standard boiling point, and a pipe with a nominal diameter greater than 25mm. Straight seam steel pipe pressure-bearing equipment, in addition to causing its explosion, may also cause explosions and fires due to medium leakage. It is very important to ensure the operation of straight seam steel pipe pressure pipelines, so our country, like many others, lists boilers as special equipment for supervision.

Second, the role of straight seam steel pipe pressure pipeline
Straight seam steel pipe pressure pipe is an important part of the production process. Its main function is to use the pressure, as well as to distribute, measure, control, and cut off the flowing medium. The pressure pipe is like the blood vessels in the human body.

3. Application of straight seam steel pipe pressure pipeline
Transportation is listed as the five major transportation industries along with railways, highways, water transportation, and shipping. Straight seam steel pipe pressure pipes are more and more widely used in the chemical industry, petroleum, electric power, metallurgy, city gas and heating systems, high temperature, corrosive, toxic, and radioactive media are important tasks, and the number of straight seam steel pipe applications occupies an important position.
Straight seam steel pipe pressure pipelines are widely used. Since the folks have been in the state of divisional management, each link of straight seam steel pipe manufacturing, installation, inspection, operation management, etc. has its system, and the technology is different. Straight seam steel pipe pressure Compared with straight seam steel pipe boilers and straight seam steel pipe pressure vessels, the management of pipelines tends to be more perfect in laws, regulations, and standards.

4. The specific composition of straight seam steel pipe pressure pipeline
The working temperature of a straight seam steel pipe is the temperature of the pipe under normal operating conditions, and the design temperature of the pipe during normal operation is the set straight seam steel pipe that may withstand the corresponding design pressure. The pipeline is composed of straight seam steel pipe, pipeline support, and so on. Used to transport, distribute, control, or stop fluid flow. The piping system, referred to as the piping system, is a plurality of pipes divided according to the fluid design conditions. Pipeline components, also known as pressure pipe components, are flanges, gaskets, tight fittings, valves, and special pipe parts used to connect or assemble pipes.
In addition, after the straight seam steel pipe pressure pipeline is put into use, to detect the transverse or longitudinal defects of the weld seam of the LSAW straight seam steel pipe, the jet (water column) coupling is used for wave flaw detection along the entire length of the weld. The jet (water column) wave flaw detection is coupled between the probe and the steel pipe through the jet, so that the longitudinal wave sound beam emitted by the probe is incident into the steel pipe through the water or steel interface, and the pure shear wave flaw detection is performed on the weld seam of the steel pipe through waveform conversion. Therefore, to realize pure shear wave flaw detection in the weld, the incident angle of the probe is between the critical angle I and the critical angle II, which can be obtained by the law of refraction.