Tube Plugs for Heat Exchangers Boilers, Condensers & Chillers
From our exclusive high and medium pressure Snap It® plugs to metal tapered, header, rubber, and non-metal plugs, we stock the widest selection of tube plugs and ship worldwide. Plug a failed tube and get the unit back in service without taking it offline.
See Snap It® Engineered Tube Plugs ›
Which Tube Plug Is Right for Your Job?
Pressure, tube material, permanence, and installation conditions all decide the right plug. Filter the options, then check the comparison table and quick finder before you order.
Snap It® Engineered Tube Plugs
High & Medium Pressure | ASME PCC-2Our exclusive engineered plug. A hydraulic ram expands the plug against the tube wall for a weld-free seal. Snap It® Jr. for medium pressure, Snap It® Sr. for high pressure.
- Petrochemical and refinery exchangers
- Power generation boilers
- High-pressure condensers
Metal Tapered Tube Plugs
One-Piece | Any Metal | Any SizeA one-piece tapered plug that seals with minimal driving force and no special tools. The standard mechanical plug for most exchanger and Fin-Fan® work.
- Fin-Fan® air-cooled exchangers
- Boilers and condensers
- Material-matched applications
Threaded Metal Tapered Plugs
Added Pull-Out ResistanceThe same taper profile as the standard metal plug, with threads for extra retention when vibration, thermal cycling, or high differential pressure is a concern.
- High-vibration service
- Thermal cycling
- Where a plain taper isn't enough
Two-Piece Metal Tube Plugs
Pin & Ring | Full-Length SealA tapered pin drives into a matching ring and expands it for a 360° seal along the full ring length, minimizing tubesheet damage. Cut to your exact tube ID.
- Thick-wall tubes
- Minimal tubesheet damage
- High-pressure boilers and condensers
1 & 2 Seal Rubber Expansion Plugs
Socket Wrench Install | ReusableTighten with a socket wrench to expand the rubber against the tube wall. Flanged or internal seal, single or double seal.
- Pressure testing tubes
- Temporary shutdown isolation
- Vacuum units (flanged)
Phenolic, Wood & Fiber Plugs
Phenolic | Micarta | WoodNon-metal plugs for emergency or temporary use. A tap with a rubber mallet seats them, and they expand slightly on contact.
- Emergency in-field isolation
- Fin-Fan® and condenser transport
- Low-temp maintenance
Rubber Tube Plugs (Stoppers)
Low Pressure | Low CostTapered rubber stoppers for low-pressure temporary plugging. Push in by hand, no tools needed.
- Maintenance and cleaning
- Non-pressurized tube protection
- Short-term isolation
Cork Tube Plugs
ID Marking | Transport ProtectionLow-cost, replaceable plugs for marking tubes during rework and keeping tubes clean in transit. Not for pressurized service.
- Marking tubes for rework
- Shipping Fin-Fan® exchangers
- Keeping tubes clean
Tube Plug Comparison
| Type | Permanent | High Pressure | Reusable | No Special Tools | Exotic Alloys | Best For |
|---|---|---|---|---|---|---|
| Snap It® Engineered | ✓ | ✓ | – | – | ✓ | Critical high-pressure sealing, ASME PCC-2 |
| Metal Tapered (1-Piece) | ✓ | Not rated | – | ✓ | ✓ | General purpose, Fin-Fan®, any alloy |
| Threaded Metal Tapered | ✓ | Moderate | – | ✓ | ✓ | Vibration and thermal cycling |
| Two-Piece Metal | ✓ | ✓ | – | ✓ | ✓ | Thick walls, minimal tubesheet damage |
| 1 & 2 Seal Rubber Expansion | – | 150 PSI max | ✓ | ✓ | – | Testing, temporary isolation |
| Phenolic, Wood & Fiber | – | – | Limited | ✓ | – | Emergency plugging, transport (230°F max) |
| Rubber Stoppers | – | – | ✓ | ✓ | – | Light-duty maintenance, non-pressurized |
| Cork | – | – | ✓ | ✓ | – | Rework marking, transport, no pressure |
Which Plug? Quick Finder
What Are Tube Plugs Used For?
Tube plugs seal off damaged, leaking, or failed tubes in heat exchangers, boilers, condensers, and shell-and-tube systems. Instead of taking the whole unit down for repair or replacement, crews plug individual tubes and return the equipment to service quickly. Common users include refineries, power plants, HVAC systems, offshore platforms, and manufacturing plants.
Tube Plug Materials
Match the plug material to the tube, or use a compatible one, to prevent galvanic corrosion and keep the seal tight long term.
How to Select the Right Tube Plug
Match the plug to your tube ID, then confirm the material suits your process fluid and temperature. Check:
- Tube inside diameter (ID) and wall thickness
- Operating pressure and temperature
- Tube material and process fluid compatibility
- Permanent or temporary installation
- Access: can you reach both ends of the tube?
- Whether tubesheet damage is a concern
Confirm dimensions with our Tube Size Chart, or call and we'll confirm the right plug the same day.
Why USA Industries Tube Plugs?
- 40+ years making precision tube plugs, trusted by refineries, plant operators, and EPC contractors
- 500,000+ tube plugs in stock, with same-day shipping on stocked items
- Custom orders in days, not weeks, with 5,000+ plugs a day of capacity
- ISO 9001:2015 certified. U.S.-produced steel, PMI verified, QC certified
- Snap It® plugs are comparable to Curtiss-Wright Pop-A-Plug® systems, with no OEM markup
- Engineering support available 24/7/365 for emergencies
- Locations in S. Houston, TX, Corpus Christi, TX, Prairieville, LA, and Broken Arrow, OK
Why USA Industries?
40+ years of manufacturing excellence and innovation
Fastest Turnaround
Same-day shipping available on stock items. Custom orders in days, not weeks.
Manufactured In-House
U.S. produced steel, PMI verified, QC certified.
ISO 9001:2015 Certified
Quality-driven manufacturing process ensures excellence.
Engineering Innovation
Precision-Engineered Industrial Solutions — Delivered Fast!
100% USA Materials
All raw materials sourced from American mills.