Mathey PPM Heat 40" Resistant Rapid Purge System - RP40/HR 32-S 045 is an excellent choice

045 is an excellent choice for welding on metals with a medium to high presence of millscale

Exceptional arc response and stability for high-quality TIG and Stick welding

Harris 450-50-540 Single Stage Stainless Steel Diaphragm Oxygen Regulator - 3002496

and worn connectors replaced with Lincoln OEM-spec parts

No — both use tri-mix or 98/2 Ar/O₂

Mathey PPM Heat 40" Resistant Rapid Purge System - RP40/HR 32-S 045 is an excellent choiceMathey PPM Heat 40" Resistant Rapid Purge System RP40 HR The Mathey PPM Heat 40" Resistant Rapid Purge System is a high performance purging solution designed for precise and efficient welding in 40 inch diameter pipes. This heat resistant system is engineered to withstand extreme temperatures up to 500 degrees, making it ideal for applications involving pre heating, welding, and post weld heat treatment. Crafted with flexibility in mind, the RP40 HR