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Precautions for laboratory gas pipeline wiring

(Summary description)

Precautions for laboratory gas pipeline wiring

(Summary description)

Information

Precautions for laboratory gas pipeline wiring

 

1. SS316LBA pipe is used to connect the pressure adjustment panel in the gas cylinder room and the gas circuit terminal in the laboratory, and the inner surface of the pipe is Ra<0.4um BA pipe.

The 2.4N nitrogen main line uses OD3/8” (6.35mm) pipelines, and the flow rate can reach 8M3/hour under 0.5Mpa pressure, which fully meets the conventional gas demand. The branch lines use OD1/4” (6.35mm) pipelines. Use welding tee to branch out the branch to supply air to the equipment.

The 3.5N nitrogen, helium, and reserved gas main lines use OD1/4" (6.35mm) pipes, and the branch lines use OD1/4" (6.35mm) pipes. Use welding tee to branch out the branch to supply air to the equipment.

4. When the pipeline passes through obstacles, pipe sleeves must be used and non-combustible materials should be used to fill the gaps.

5. The pipelines are connected by an advanced American automatic positioning orbital argon arc welding machine for internal and external protected argon arc welding (TIG). The advantage is that the leakage rate can reach 1X10-9s.cc/sec.He, and it will not Then the inner surface produces welding defects such as oxide layer or wrinkles.

6. All the tees on the pipeline are connected by welding tees, which can more effectively ensure the quality of gas transmission.

7. The pipeline needs to be fixed on the pipeline support with a fixing fixture. The pipe support is a channel steel structure that is beautiful and generous. It is firmly fixed to the wall and pipe. And it is made of refractory material (aluminum alloy).

8. The gas pipeline should be horizontal and vertical during the laying process. In order to ensure the straightness of the pipeline and the spacing between the pipelines, a set of pipe clamps should be installed at a certain distance. The fixture should be made of non-combustible materials, beautiful and generous.

9. The bending should be minimized to prevent excessive pressure and flow loss of the gas being transmitted. The bending stress concentration area of ​​the pressure pipeline should be safely reinforced, and the bending radius should be designed appropriately, and the bending part should not be wrinkled or twisted. The bending radius and bending quality are guaranteed by special tools. System wiring should minimize seams to reduce the possibility of leakage.

10. When piping, each pipe and each fitting must be purged with high-pressure 5N high-purity nitrogen before it can be connected to the system. After the entire system is installed, 5N high-purity nitrogen must be used for large-flow gas purging to ensure The cleanliness of the system means that the outflowing gas is free of grease and obvious solid particles.

11. After the system is installed, the high-purity nitrogen gas should be used for the air tightness test of the high-pressure part and the low-pressure part to test the entire system.

12. Paste identifications such as the gas path number, gas type, concentration, etc. on the pressure adjustment panel and the gas path control terminal.