AW205 - Smith Equipment AW205 Airline Series Acetylene Tip, Size 205

Technical Overview of the Smith Equipment AW205

The Smith Equipment AW205 is a specialized oxy-fuel welding tip engineered for precision and durability within the Airline Series ecosystem. Designed to interface seamlessly with Smith AW series torch handles, this component is calibrated specifically for the combustion characteristics of Acetylene gas. The tip features a specific orifice geometry that produces a stable, concentrated flame suitable for welding mild steel with a thickness of approximately 1/8 inch (3 mm). In addition to its welding capabilities, the thermal output is rated for brazing copper piping with outer diameters ranging from 1/2 inch to 7/8 inch, making it a versatile component for HVAC and plumbing applications requiring precise heat control.

Structurally, the AW205 distinguishes itself through the use of heavy-wall copper. In thermodynamics, copper is chosen for its exceptional thermal conductivity. By increasing the wall thickness, Smith Equipment has enhanced the tip's ability to conduct heat away from the flame face and back towards the mixer and handle, where it can be dissipated into the ambient air. This rapid heat dissipation is critical for preventing pre-ignition and flashback, particularly when working in confined spaces where reflected heat from the workpiece can raise the tip temperature to dangerous levels. The cooler operation ensures consistent flame chemistry and protects the integrity of the internal gas passages over prolonged duty cycles.

The physical design of the AW205 includes a long straight-away section at the discharge end. This geometric feature is not merely aesthetic; it serves a functional maintenance purpose. Over time, the face of any welding tip can become pitted or deformed due to spatter and accidental contact with the weld pool. The extended straight section allows the tip face to be dressed and refaced—essentially ground down slightly to expose a fresh, flat surface—without altering the critical orifice diameter or flame characteristics. This design consideration significantly extends the operational lifespan of the consumable compared to tapered tips that cannot be resurfaced. Users must ensure this tip is used strictly with Acetylene fuel gas, as the flow rates and induction characteristics are not compatible with alternate fuels like Propane or MAPP gas.