What are the applications of straight seam steel pipes in pressure pipelines

The nominal diameter of a straight seam steel pipe refers to the series of diameter dimensions specified in the straight seam steel pipe standard. For straight seam steel pipes, fittings, valves, etc., the nominal diameter is expressed using the series specified in the standard. Straight seam steel pipe components used for transporting fluids adopt the nominal diameter series. The Chinese standard for straight seam steel pipes uses integers in millimeters (mm) to express the nominal diameter. The working pressure of a straight seam steel pipe refers to the pressure that the pipe, fittings, valves, and other pipeline components withstand under normal operating conditions. The design pressure of a straight seam steel pipe refers to the pressure that the pipeline withstands under relatively harsh conditions set in the corresponding design temperature combination during normal operation. The specific content of straight seam steel pipe pressure pipelines will be introduced in detail below:

First, what is the definition of a straight seam steel pipe pressure pipeline? 
The definition states that a straight seam steel pipe pressure pipeline should include all straight seam steel pipe pipelines that utilize pressure to transport gases or liquids. From a production perspective, the term "pressure vessel" follows the naming convention of straight seam steel pipes. Therefore, it is not simply a pressure-bearing pipeline in the traditional sense. The scope of straight seam steel pipe pressure pipelines is defined by the probability and severity of accidents. Our country has clearly defined the scope and definition of straight seam steel pipe pressure pipelines. Pressure pipelines are tubular devices used to transport gases or liquids at pressures above or equal to the standard boiling point, with a nominal diameter greater than 25mm. Straight seam steel pipe pressure-bearing equipment, besides being prone to bursting, can also cause explosions and fires due to media leakage. Ensuring the operation of straight seam steel pipe pressure pipelines is extremely important; therefore, my country, like many other countries, classifies boilers and similar equipment as special equipment and implements strict supervision.

Second, what are the functions of straight seam steel pipe pressure pipelines? 
Straight seam steel pipe pressure pipelines are an important component of the production process. Their main function is to utilize pressure, and they also play a role in distributing, metering, controlling, and cutting off the flow of media. Pressure pipelines are like blood vessels in the human body.

Third, what are the applications of straight seam steel pipe pressure pipelines? 
Transportation is one of the five major transportation industries, alongside railways, highways, waterways, and shipping. Straight seam steel pipe pressure pipelines are increasingly widely used in chemical, petroleum, power, metallurgy, urban gas, and heating systems, handling important tasks involving high-temperature, corrosive, toxic, and radioactive media. The number of straight seam steel pipes used is significant. The application of straight seam steel pipe pressure pipelines is extremely widespread, but historically, management has been fragmented across different sectors. Each industry's manufacturing, installation, inspection, and operation management of straight seam steel pipes has its own system, with varying technologies. The management of straight seam steel pipe pressure pipelines is more comprehensive in terms of laws, regulations, and standards compared to straight seam steel pipe boilers and pressure vessels.

Fourth, what are the specific components of a straight seam steel pipe pressure pipeline? 
The working temperature of the straight seam steel pipe pipeline is the temperature under normal operating conditions. The design temperature of the straight seam steel pipe pipeline is the temperature it can withstand during normal operation. The pipeline consists of the straight seam steel pipe itself, pipe supports, etc. It is used to transport, distribute, control, or stop fluid flow. A piping system, or simply a piping system, is a collection of pipes classified according to fluid design conditions. Piping components, also known as pressure piping elements, are flanges, gaskets, fasteners, valves, and other special piping parts used to connect or assemble the pipes.

Furthermore, after the commissioning of straight seam steel pipe pressure pipelines, jet (water column) coupling is used for wave testing along the entire length of the LSAW (Laser-Seam Welded) straight seam weld to detect transverse or longitudinal defects. Jet (water column) wave testing couples the probe and the steel pipe through a jet, allowing the longitudinal wave beam emitted by the probe to pass through the water or steel interface and enter the steel pipe. Waveform conversion is then used to perform pure transverse wave testing of the weld. Therefore, to achieve pure transverse wave testing in the weld, the probe incident angle must be between the first critical angle and the second critical angle, which can be derived from the law of refraction.