... of stainless steel(304 2.Test pressure:30Mpa 3.Test before delivery 4. Details about CNG high pressure pipes CHG tube: resist high ... used in CNG fuel-auto and double fuel-auto, auto-braking system; auto-oil system, fuel system,etcThe high pressure tube is ... .Used to connect the steel cylinder, filling port, high pressure solenoid valve, and pressure reducer, there is a rubber pipe on the surface to ...