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Supply Solutions |
The supply system is essential to the success of any gas installation. When designing a supply system, the following key factors must be taken into consideration:
- Material and dimensions of the tubing system, hoses included
- Type of joints in the tubing system
- Type and the capacity of the regulators
- Equipment and safety features
Tubing system material
These should be stainless steel and copper tubes, free of oil and grease. For acetylene mild steel pipes can be used. Metal tubing provides the utmost resistance to permeation of impurities which can contaminate pure gases. Copper and silver should be avoided when using acetylene.
Hoses are far from ideal. They are not as diffusion-tight as metal tubing. If hoses cannot be avoided, make sure to use a hose that is compatible with the gas.
Dimensions
The diameter of the tubes is mainly determined by the required gas flow, but also by the length of the system, the number of fittings, bows (which result in pressure losses), etc.
Joints
Stainless steel tubes should be welded with the orbital TIG process and purged with backing gas during welding. Copper tubes should be brazed with backing gas. Alternatively, compression ring fitting can be used. Gas welding can be used on mild steel tubes for acetylene.
Regulators
The regulator type depends on the gas purity, flow and pressure requirements. A single-stage regulator with a rubber diaphragm is sufficient for flame welding whereas a dual-stage regulator with a metallic diaphragm is the best choice for laser gases.
Purging device
Each high-pressure regulator for lasers or similar equipment should have a purging facility. When the gas cylinder is changed, the high-pressure hose is exposed to air and dust, and moisture and gases can enter the gas supply system.
Filters
Particle filters prevent unwanted particles from entering the system. These should be installed at the point-of-use. For acetylene lines, liquid filters to trap excess acetone might be needed.
Safety devices
Flash-back arrestors, non-return and safety relief valves are required for some gases.
Gas supply systems must be individually designed to reflect the application needs! Visit our local websites to discover how we can help you design the ideal supply system, drawing on our broad offering of gases, equipment and services. Our local experts would love to hear from you – by e-mail or phone. Rest assured that we will do our best to support you.
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