The material and accessories of the compressed air pipeline shall be selected according to the design requirements. 

If the design is not clearly defined, the selection shall be in accordance with the clean room cleanliness level and the nature of the transport gas, and shall comply with the following requirements:

1, should use seamless pipe

2. The effect of adsorbing and desorbing gas on the surface of the compressed air pipe is small.

3. The inner surface of the pipe should be smooth and wear resistant.

4, should have good corrosion resistance

5. The metal structure of the pipe should not change during the welding process.

6. It is not advisable to use ordinary carbon steel pipes for negative pressure pipes. Stainless steel pipes and aluminum alloy pipes should be used.