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Weld Fittings

Weld Fittings and Adapters

Weld Fittings

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Swagelok offers weld fittings in a variety of materials, sizes, and shapes to suit any industrial or high-purity application. Permanent, high-integrity connections provide strength and reliability in a range of alloys to meet your requirements for quality and corrosion-resistance.

Our selection includes:

  • Micro-Fit® High-Purity Tube Butt Weld Fittings
  • Pipe Socket weld Fittings
  • Subsea Weld Fittings
  • Tube Butt Weld Automatic Fittings
  • Tube Butt Weld Fittings
  • Tube Socket Weld Automatic Fittings
  • Tube Socket Weld Fittings
  • Weld Adapter Fittings


Weld Fittings—Ultrahigh-Purity, Specially Cleaned, and Industrial Weld Fittings

Pressure Ratings Up to 12 600 psig (868 bar )
Temperature Ratings Up to 1000°F (537°C)
Material 316, 316L, 316L VIM-VAR stainless steels
End Connections
   Types Micro-Fit® (miniature tube butt weld), tube butt weld, tube socket weld, pipe socket weld, pipe butt weld
   Sizes 1/8 to 1 in.; 6 to 18 mm
Configurations Straights, elbows, tees, crosses, reducers, adapters

Subsea Weld Fittings

These fittings are specifically designed for the rigors of subsea applications with a range of materials offered and pressure ranges from 4,000 psig (275 bar) to 22,100 psig (1522 bar). All subsea weld fittings are NACE MR0175 / ISO 15156 compliant, and Alloy 2507 fittings are NORSOK M-630 and M-650 compliant. Weld tangent lengths from 3/4 to 2 inches are available to facilitate on-site repairs and reduce system downtime and scrap.

Pressure Ratings Up to 22 100 psig (1522 bar)
Temperature Ratings Up to 1000°F (537°C) – 316L and Alloy 625
Up to 482°F (250°C) – Alloy 2507
Material 316L, Alloy 2507, Alloy 625
End Connections
   Types Weld unions, weld to male ST (SAE/MS), weld to male AN (JIC), weld to cone and thread tube nipple adapter
   Sizes 1/4 to 1 in.
Configurations Straights, elbows, tees, reducers

Super Duplex Weld Fittings

Pressure Ratings Up to 26 200 psig (1810 bar)
Temperature Ratings Up to 482°F (250°C)
Material 2507 super duplex stainless steel
End Connections
   Types Tube butt weld, male adapters, female connectors
   Sizes 1/4 to 1 in.

Straights, elbows, tees, reducers

View and purchase our most widely used products.

Discover more about how Swagelok products can work for you. Browse our catalogs or locate a sales and service center.

"Safe Product Selection: The complete catalog contents must be reviewed to ensure that the system designer and user make a safe product selection. When selecting products, the total system design must be considered to ensure safe, trouble-free performance. Function, material compatibility, adequate ratings, proper installation, operation, and maintenance are the responsibilities of the system designer and user.

Do not mix or interchange product components with those of other manufacturers."