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> New oxy acetylene hoses 5/16" x 12.5'
New oxy acetylene hoses 5/16" x 12.5'
K2 Products Grade T Fuel Gas Hose.
Item: 5/16" x 12.5' with B C ends
* Rubber hose and solid brass fittings - one end, plain hose the other end.
* Include hose clamps as seen in the picture.
* 5/16" diameter allows for more gas flow.
Grade R - for acetylene only. Tube and cover are not flame or oil resistant.
Grade RM for acetylene only. Tube is not oil or flame resistant, flame and oil resistant cover.
Grade T for all fuel gases. Flame and oil resistant tube and cover.
Why are Grades R and RM for acetylene only?
For many years the prevalent fuel gas in the industry was acetylene. Acetylene has little or no adverse effects on rubber. Therefore, no requirements for fuel gas compatibility were initially specified in the RMA/CGA IP-7 standard.Due to enhanced performance or reduced cost, different types of fuel gases (propane, natural gas, MAPP,propylene, hydrogen, etc.) became popular. Many of these fuel gases are detrimental to certain types of rubber.With the use of these fuel gases, combining the wrong hose and fuel could lead to premature hose failure, propertydamage and personal injury.
It is acceptable to use Grade R, RM and T with acetylene. However the application should be evaluated before theselection of a particular Grade of hose (See "When should I use Grade T hose?")
When should I use Grade T hose?
If you are using a fuel gas other than acetylene, you must use Grade T hose. Grade T hose ensures compatibilitywith the gas being conveyed and user safety. If using acetylene, Grade T hose may provide additional featuresover the Grade R and RM that make it beneficial for the applications. Some of these are:
Oil resistance: When exposed to an oil environment, the Grade R hose may become soft and tacky. This canlead to cover separation from the reinforcement or excessive wear of the cover. Both of these conditions can leadto premature hose failure and decreased service life. The Grade T hose provides protection from oil, both internallyand externally, while only the cover of the Grade RM provides this protection.
Flame Resistance: The Grade T hose provides added protection, both externally and internally, when exposed to a flame or hot materials. The tube and cover of the Grade T hose are self-extinguishing and provide maximumsafety when exposed to adverse conditions such as hot slag, flash backs or inadvertent flame exposure. The cover of the Grade RM hose also provides this protection. Grade R has no flame resistance requirements.
