... CNG high pressure pipes CHG tube: resist high press from outside,no leak on tube, tested by 500kg water press;smooth and tough ... in CNG fuel-auto and double fuel-auto, auto-braking system; auto-oil system, fuel system,etcThe high pressure tube is the ... cylinder.Used to connect the steel cylinder, filling port, high pressure solenoid valve, and pressure reducer, there is a rubber pipe on the surface ...