100ft Grade R Oxy-Acetylene Twin Hose 1/4 Inch

Technical Overview: Grade R Oxy-Acetylene Twin Hose

The HOSRH-2105 is a specialized industrial gas hose assembly designed to meet the rigorous safety and performance standards of oxy-acetylene welding and cutting operations. This product is classified as a Grade R hose, indicating its specific formulation for use with Acetylene fuel gas only. The hose features a twin-line "Siamese" construction, where the oxygen and fuel lines are molded together laterally to create a single, manageable unit that resists tangling while maintaining the distinct separation of gases required for safety.

Material Specification and Safety

The inner tube and outer cover of Grade R hoses are constructed from rubber compounds tailored for Acetylene service. It is critical for operators and safety managers to note that Grade R hoses are not oil-resistant and are not compatible with alternate fuel gases such as Propane, Propylene, or Natural Gas. Using these alternate fuels with Grade R hose can cause the inner lining to deteriorate, leading to potential leaks and safety hazards. For Acetylene applications, however, this hose provides a cost-effective and reliable solution. The exterior is color-coded according to CGA standards—Green for Oxygen and Red for Acetylene—to facilitate correct connection and immediate visual identification of gas lines.

Dimensions and Flow Characteristics

With a total length of 100 feet, this hose assembly is ideal for facility maintenance, shipyards, and large fabrication floors where the work piece cannot be easily moved to the gas source. Despite the significant length, the 1/4-inch inner diameter (ID) ensures that pressure drop is minimized, maintaining a stable flame at the torch tip. Smaller diameter hoses (such as 3/16") may experience noticeable pressure loss over a 100-foot run, potentially affecting cut quality or weld integrity. The hose comes pre-assembled with standard brass B-size fittings (9/16"-18 threads), ensuring compatibility with the vast majority of industrial regulators and torch handles.

Durability and Compliance

The HOSRH-2105 is built to withstand the physical demands of an industrial environment. The reinforcement layer, typically a high-tensile synthetic yarn, provides the necessary burst strength while maintaining flexibility. Regular inspection of the hose for signs of dry rot, cracking, or abrasion is recommended to ensure continued safe operation.