Permeation test. This test is only required on type CNG-4 designs. One finished cylinder shall be filled with compressed natural gas or a 90 per cent nitrogen/10 per cent helium mixture to working pressure, placed in an enclosed sealed chamber at ambient temperature, and monitored for leakage for a time sufficient to establish a steady state permeation rate. The permeation rate shall be less than 0.25 ml of natural gas or helium per hour per litre water capacity of the cylinder.
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Samples: unece.org, www.apvgn.pt, tind-customer-undl.s3.amazonaws.com
Permeation test. This test is only required on type CNG-4 designs. One finished cylinder shall be filled with compressed natural gas or a 90 per cent nitrogen/10 per cent helium mixture to working pressure, placed in an enclosed sealed chamber at ambient temperature, and monitored for leakage for a time sufficient to establish a steady state permeation rate. The permeation rate shall be less than 0.25 ml of natural gas or helium per hour per litre liter water capacity of the cylinder.
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Samples: wiki.unece.org
Permeation test. This test is only required on type CNG-4 designs. One finished cylinder shall be filled with compressed natural gas or a 90 per cent percent nitrogen/10 per cent percent helium mixture to working pressure, placed in an enclosed sealed chamber at ambient temperature, and monitored for leakage for a time sufficient to establish a steady state permeation rate. The permeation rate shall be less than 0.25 ml of natural gas or helium per hour per litre liter water capacity of the cylinder.
Appears in 1 contract
Samples: unece.org
Permeation test. This test is only required on type CNG-4 designs. One finished cylinder shall be filled with compressed natural gas or a 90 per cent nitrogen/10 per cent helium mixture to working pressure, placed in an enclosed sealed chamber at ambient temperature, and monitored for leakage for a time sufficient to establish a steady state permeation rate. The permeation rate shall be less than 0.25 ml of natural gas or helium per hour per litre litreliter water capacity of the cylinder.
Appears in 1 contract
Samples: wiki.unece.org