line pipe is the oil, gas or water extracted from the ground, through the pipeline pipe to the oil and gas industry enterprises. The pipeline pipe comprises two kinds of seamless pipe and welded pipe, and the pipe end has a flat end, a threaded end and a socket end; The connection modes are end welding, collar connection, socket connection, etc.

Standard:

API SPEC 5L- American Petroleum Institute standard

GB/T9711-- Chinese national standard

Purpose:

Oxygen, water and oil pipes used in the oil and gas industry

Main production of steel pipe grade:

B, X42, X52, X60, X65, X70 L245 L290 L320 L360 L390 L450 L485

The main difference between line pipe and general steel pipe is its use and characteristics

1. Purpose: Line pipes are mainly used to transport high-pressure, high-temperature, highly corrosive gases or liquids, such as oil, natural gas, chemicals, etc.; while general steel pipes are mainly used for transportation and manufacturing in construction, bridges, machinery, electric power and other industries. or structural purposes.

2. Characteristics: Line pipes have the characteristics of high strength, high corrosion resistance, high temperature strength and good weldability, and can withstand the transmission of high pressure, high temperature and highly corrosive gases or liquids; while general steel pipes are relatively ordinary and require the required strength And corrosion resistance is relatively low.

3. Size and thickness: Compared with ordinary steel pipes, line pipes are larger in size and thicker. In general, line pipes are special pipes designed for specific purposes and have higher characteristics and quality requirements, while general steel pipes are more versatile and have a wider range of applications.

Mechanical properties

Chemical composition

American Petroleum Institute Standard (API SPEC 5L) pipeline specification sheet：

What are line pipes used for?

H3-Uses of line pipe

In the specifications for the use of pipeline pipes (API SPEC 5L-2011), it is clearly stated that the purpose of pipeline pipes is to transport liquid and gaseous fuels and raw materials such as oil, natural gas, water, and oil, because these substances require very high sealing properties.

So line pipe is a means of transportation for transporting raw materials to oil and gas companies. Of course, the emergence of line pipes has greatly reduced the waste and pollution of raw materials during transportation, increased the work efficiency of enterprises and improved product quality. Therefore, line pipe is an ideal transportation tool.

H3-Line pipe classification

Line pipes are divided into two types according to the connection method. One is seamless. This connection method ensures the air tightness during transportation to the greatest extent but is not very flexible because once the welding is completed, it is difficult to change the transportation direction. , so mobility is very poor, so route planning must be done in advance.

Another type is seam welding. This welding method can be cut off at any time with a plasma cutting machine and then changed in direction. However, it also has the disadvantage that the air tightness is easily affected, so the two types of welding methods each have their own advantages. The advantage is that you can judge whether it is a permanent installation according to your own needs? Or a temporary installation that needs to be replaced later.