Scope: The following applies to the flow of LPG (liquefied petroleum gas) MPS (propylene / propadiene mixture), natural gas (CNG), methane (CH4), and dual-purpose R hose suitable for gas welding difficult. In line RMA / CGA Standards for Grade T welding hose requirements. Non-conductive, in this grade rubber tube rubber layer and a protective layer are equipped with oil resistance and flame retardance.

Use standard: RMA IP-7--1999

Compatible Standard: BS EN559-2003 GB2550-92 GB2551-92

Ozone aging: The standard test chamber concentration of 50 ± 5PPHM temperature of 40 ± 2 ℃ Duration 72t no cracks

Heat aging: Aging Standard box 70 ± 1 ℃ 72t stretching the length of the rate of change within -25%

Physical properties: elongation ≥300% inside and outside hose layer that at 30 ℃ ± 2 ℃ environment, good flexibility, bending without cracking on the fold 180 degrees and break phenomenon

Corrosion resistance: the inner and outer layer oil RMA-B grade hexane is corrosion and flame retardant requirements have RMA

Structure: Hose inner level EPDM / NBR synthetic rubber

            The material layer EPDM / NR kneading

           Hose protective layer NBR & PVC nitrile rubber or PVC co-mingled CR neoprene

           Intermediate reinforcing layer of polyester fiber line

External table: Smooth surface or streaks

            Oxygen rubber hose outer green or blue

            Gas pipe outer orange rubber

Operating temperature: -20 ℃ to 70 ℃

Bending radius: 10 times its own diameter *

Packing: 1, common specifications size can be supplied, pressure, weight, length volume parameters, see table.

          2, dual protection standard packaging: inner transparent PE film wrapped tape around the outer layer of the preparation.