... in gas, liquefied gas, natural gas, oil, water etc. 1) Size: 1/2" corrugated metal hose2) PN: 0.7 M Pa3) Comply ... having gases permeate through them and into the atmosphere. Metal, on the other hand, does not allow permeation. If containing the gases ... the product can be catastrophic, using metal may help minimize the effects of a failure by leaking at a slower rate. Abrasion ...