NPS/SCH Pipe Silicone Purge Plugs (Pack of 2)

Purge plug sizes by the pair for Nominal Pipe NPS Schedule Pipe SCH5, SCH10, SCH40, SCH80 

Manufactured from high-temperature silicone, these argon purge plugs are engineered to withstand intense welding heat, remaining stable even when positioned up to 1 inch away from the weld seam. Designed for professional fabricators, each plug features a multi-layer stainless steel diffuser that creates laminar argon flow inside the tube or pipe, ensuring consistent purge coverage while maximizing argon efficiency.

To complete the system, each plug is equipped with our updated argon inlet tube, available in 1/4" or 6mm, providing exceptional heat resistance, durability, and corrosion protection. Ideal for titanium and stainless steel welding, these purge plugs deliver cleaner welds, reduced contamination, and repeatable results in high-precision fabrication environments.

Learn more about laminar flow

UPGRADE: Add our Shower head diffuser fittings for the most secure hose connection. In both Quick Disconnect and 6mm hose barb

(two plugs, two screens and one 0.25” inlet/outlet tube)
Email us with any compatibility questions Not listed in this description.

Sized to Actual NPS Pipe, Not a Tube Chart

NPS pipe sizing doesn't track actual pipe diameter the way tube sizing does — a 1.5" pipe measures closer to 1.9" across, a 2" pipe closer to 2.4". Every size in this line is fit-matched to real NPS/Schedule pipe dimensions rather than assumed off a tube-diameter chart, so the seal and purge coverage hold regardless of which "1.5-inch" you're used to.

Built for the Shop Floor, Not Just the Garage

This line runs 1" through 10" NPS — sized for fabrication shops and industrial accounts running schedule pipe daily. Same multi-layer stainless diffuser and our updated titanium inlet tube, scaled up for pipe.

Frequently Asked Questions

What size purge plug do I need?
Match to your pipe's NPS nominal size, not its measured outside diameter.

What schedules does this fit?
SCH5 through SCH80

Are these reusable?
Yes, designed for repeat use across jobs, not single-use.

Size Guide