Parker 7109NLM-300 Siamese Oxyacetylene Welding Hose 25' 3/8" I.D. - $75 - (Marshfield, MO)
New Parker Hannifin 25' 3/8" I.D. Oxyacetylene Welding/Cutting HoseGrade T, Used for All Common Fuels, Not just for Acetylene as with Grade R hoses3/8" Inside Diameter for higher flow than 1/4" ID HoseHeavy Duty Construction for years of trouble-free commercial or home usehttp://ph.parker.com/us/en/grade-t-twin-line-welding-hose-factory-assemblies-siameez-series-7109/7109nlm-300Buyer pays actual shipping chargesPlease See My Other ListingsWhat do the Grades and Types mean? 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. Type L – light duty service, single line Type S – standard duty service, single line Type H – heavy-duty service, single line Type VD – vulcanized double line (twin weld hose) 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, property damage and personal injury. Due to safety concerns, the RMA/CGA organizations changed the standard to include the use of these gases. Additional requirements for hose compatibility were added to the standard in 1990 and the IP-7 standard was changed, adding a new Grade T classification for all fuel gases. The Grade R and RM classifications were also changed to reflect their use for acetylene only. What hose do I need when the gas is acetylene? It is acceptable to use Grade R…
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