The application of sandblasting pipes in modern industrial activities is very extensive, especially in shipbuilding, machining, spraying industries and so on. The sandblasting pipe fully demonstrates the advantages of "energy saving, environmental protection, economy and high efficiency" under the conditions of strong corrosion and high wear. Because the sandblasting pipe has a minimum necessary strength of 10MPa, it has more advantages in use. What conditions need to be met in order to be well used in practical applications?

The excellent functionality of a blast pipe is largely determined by its semi-crystalline layout. Its short-term strength, impact strength, tensile strength, hardness, etc. are mainly limited by the crystalline phase of the material; while its long-term strength, such as resistance to environmental stress cracking, depends on the chain entanglement molecules in the amorphous region, the crystal The more interlaced adaptor molecules the better the function.

1 Operating temperature: The operating temperature of the hose is -20-70 ℃.

2 Material and structure: The blasting pipe shall be composed of the following parts: inner lining (inner layer); reinforcement layer of natural or synthetic fabrics laid by appropriate methods; outer covering layer (cover layer); Layers are mostly made of laminated cloth method and cord winding method.

3 Hydraulic requirements: the maximum working pressure of the hose is 0.63MPa. When the hose is hydraulically tested under twice the working pressure, there should be no water seepage, no local bulge, no expansion and no other abnormal phenomena. The antistatic hose maintains the pressure for 1min, the length change should not exceed ±0.8%, the outer diameter change should not exceed ±10%, and the twist per meter should not exceed 60&ordm. The burst pressure of the hose should be no less than 4 times the working pressure.

What aspects of the blast pipe affect its resistance

Generally speaking, the development of the pipe industry is relatively fast, and the needs of different industries directly determine the development of the pipe industry. Sandblasting pipes are a typical example. In practical applications, we found that the sandblasting pipe has very strong resistance performance. Today we want to understand the aspects that affect its performance:

1. The service life of the sandblasting pipe is 6-10 times that of the steel pipe under the conditions of strong corrosion and high wear, which fully demonstrates the advantages of "energy saving, environmental protection, economy and high efficiency".

2. The impact resistance and impact energy absorption of ultra-high molecular weight sandblasting pipe ranks first in plastics. Whether it is strong external impact or internal pressure fluctuation, it is difficult to crack it. Its impact strength is 10 times that of nylon 66. It is 20 times that of vinyl chloride and 4 times that of polyethylene, and its flexibility provides a very safe and reliable guarantee for the transportation system.

3 Because the sandblasting pipe has the minimum necessary strength of 10MPa, it is more pressure resistant than other polyethylene, and can carry high pressure transportation of gas and liquid. Generally, according to SDR (SDR=nominal outer diameter/nominal regular wall thickness), the polyethylene pipe material For grading, the larger the SDR, the higher the grade.

4 The excellent function of the sandblasting pipe largely depends on its semi-crystalline layout. Its short-term strength, impact strength, tensile strength, hardness, etc. are mainly limited by the crystalline phase of the material; while its long-term strength, such as resistance to environmental stress cracking, depends on the chain entanglement molecules in the amorphous region, the crystal The more interlaced adaptor molecules the better the function.