The next area to focus on is the actual installation itself to ensure compliance and safety.
The air mains can be sited at any level from under-floor ducting to overhead. For ease of servicing and draining and for access when connecting to service points, the overhead main is often used. Below are some general compressor pipeline installation guidelines:
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Pipes must not be allowed to sag or hog, especially at threaded or flanged joints, since the bending stress could result in leakage and possible pipe fracture. Follow manufacturer’s instructions for support spacing.
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The air main should be supported throughout its length, so that the correct fall to the drain points is maintained and condensate cannot collect in the pipe itself.
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Allowance must be made for thermal expansion and contraction. This allowance will vary with the material used.
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Compressed air piping should not be attached to (i.e. hung from) other utilities such as gas mains.
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In jointing, it is important to read the instructions – many new modular piping systems may be similar in appearance, but the jointing procedure can be quite different. If not correctly carried out this presents a real risk of failure and consequent injury to personnel. Over-tightening can be as dangerous as fittings that are too loose and will subsequently fail.
