02e39f42_stem_Risks_of_Alternative_Fuel__Background
[Hazard --Event] Fire -- fromleakingundergroundCNG piping tofueling islanddue tocorrosion [Consequences] The high line pressure meansthat large amounts of fuel canbe released quickly. [Knowledge] Although high pressure gaspiping is often made of stainlesssteel, there is little experiencewith this type of service overthe long term. Most CNGfacilities are just a few years oldor less. [Background] 
Piping from the compressor to the dispenserhas pressures of 3000-4000 psig. Such pipingis often made of stainless steel. Althoughstainless steel resists many types of corrosion,some types of stainless steel are verysusceptible to chloride corrosion. Of course, incold climates, sodium chloride is commonlyused as road salt.
Clean Air Program -- Assesment of the Safety, Health, Environmental and System Risks of Alternative Fuel
Background