GPN-2 - Flame Tech GPN-2 Propane Cutting Tip Size 2 for Victor 300 Series

Technical Overview of the Flame Tech GPN-2 Cutting Tip

The Flame Tech GPN-2 is a high-efficiency cutting tip engineered specifically for use with alternative fuel gases such as Propane and Natural Gas. As a direct replacement for Victor-style GPN series tips, this consumable is designed to interface seamlessly with Victor 300 Series cutting attachments and straight torches. The "Size 2" classification indicates its calibrated flow rates and orifice sizing, making it suitable for cutting mild steel ranging from approximately 1 inch to 1-1/2 inches in thickness. This range covers a significant portion of general fabrication and structural steel work, making the GPN-2 a staple in industrial inventory.

Structurally, the GPN-2 utilizes a two-piece design, which is the industry standard for propane and natural gas applications. Unlike single-piece acetylene tips, the two-piece configuration consists of a brass inner member with splines and a copper outer shell. This separation serves a critical thermodynamic function: the recession of the inner member creates a stable anchoring point for the flame, preventing blowout even at the higher flow velocities required for alternative fuels. The heavy preheat spline configuration ensures that sufficient heat is generated to bring the base metal to kindling temperature rapidly, compensating for the lower flame temperature of propane compared to acetylene.

Maintenance and longevity are key benefits of this design. The outer copper shell can be easily removed, exposing the splines of the inner brass insert for thorough cleaning. This accessibility prevents carbon buildup and slag accumulation from permanently degrading the tip's performance. The tip seats are precision-machined to ensure a gas-tight seal within the torch head, preventing dangerous leaks and flashbacks. Operators utilizing the GPN-2 can expect consistent flame stability, clean kerf lines, and reliable ignition when paired with properly regulated oxygen and fuel pressures.