Pipeline steel pipe heat transfer liquid and its characteristics

Posted by chase Liu on December 19th, 2022

L245 pipeline steel pipe is usually used to transfer heat transfer liquid, such as L245 pipeline steel pipe in local heating or remote heating system and cooling system. The pipes also include steel pipes for conveying a liquid heat transfer medium. The steel pipe is surrounded by insulating material (such as polyurethane foam) and surrounded by an outer water-resistant weldable plastic sleeve (usually polyethylene and so-called PEHD).

Consideration should be given to burying the pipes in the ground, which will corrode the pipes from the water and moisture that constantly seeps into the pipes, and withstand relatively good pressure and pressure. In the long run, this will lead to leaks, which will lead to ongoing maintenance. Pipes such as pipes are sometimes buried under roads or highways, making it difficult to access damaged pipes due to the need to lift them from the ground. Therefore, such access requires high cost.

Consequently, maintenance costs are high, and so are heating tubes especially in special areas with alarm circuits, since leakage levels need to be maintained with relative precision. The alarm wire should be installed in such a way that it can be buried between the external pipe and the steel pipe.

What are the characteristics of pipeline steel pipe?

1. Pipeline steel pipes can be divided into seamless steel pipes and welded tubes. Pipeline steel pipes are formed by extruding seamless round pipes.

2. Impact toughness of pipeline steel pipe: the load acting on the machine parts at a high speed is called impact load, and the ability of metal to resist damage under impact load is called impact toughness.

3. Fatigue of pipeline steel pipe: The strength, plasticity and hardness discussed above are all indicators of the mechanical properties of metals under static load. In fact, many machine parts work under cyclic loads, under which the parts will fatigue.

4. Hardness of pipeline steel pipe: Hardness is a pointer to measure the softness and hardness of metal materials. At present, the commonly used method for measuring hardness in production is the indentation hardness method, which uses an indenter with a corresponding geometric shape to press into the surface of the metal material to be tested under a corresponding load, and determines its hardness value according to the degree of indentation.

5. Plasticity of pipeline steel pipe: Plasticity refers to the ability of metal materials to produce plastic deformation (long-term deformation) without damage under load.

6. Strength of pipeline steel pipe: strength refers to the performance of metal materials to resist damage (excessive plastic deformation or fracture) under the action of static load. Since the load acts in the form of tension, compression, bending, shearing, etc., the strength is also divided into tensile strength, compressive strength, flexural strength, and shear strength. There is often a corresponding relationship between various strengths, and tensile strength is generally used as a more basic strength indicator in use.

Supervise the welding environment. When the welding environment is not good (the temperature is lower than 0°C and the relative humidity is higher than 0°C), corresponding measures should be taken before welding. Check the groove size before pre-welding, including whether the gap, blunt edge, angle and gap meet the process requirements.