Pipe Fittings
Fittings That Match the Flanges
Elbows, tees, reducers, caps, couplings, unions, and stub ends in butt-weld, socket-weld, and threaded configurations. ASME B16.9 and B16.11 sized from small bore through 60 inch, schedule 10 through XXH, in the same material grades as our flange catalog so the BOM does not bounce between three suppliers.
Categories
What We Stock
Elbows - 45 and 90
Long radius and short radius. 45 degree and 90 degree. Available in standard and reducing configurations. Long radius is the default unless space requires the short.
Tees
Equal tees and reducing tees. Straight branch is standard. Lateral and barred tees available on request for specific service requirements.
Reducers
Concentric for centerline-critical lines such as steam and gas. Eccentric for liquid service where draining or vapor pocketing is a concern. Both stocked across schedules.
Caps
Pressed and forged pipe caps to close line ends. Used during construction, hydrotest, and for permanent terminations on dead legs.
Couplings
Full, half, and reducing couplings in socket-weld and threaded. Sized to ASME B16.11 in classes 3000, 6000, and 9000.
Unions
Threaded unions for piping that needs to be broken apart for service or inspection. Stocked in carbon, stainless, and select alloys.
Stub Ends
Type A and Type B stub ends to pair with lap joint flanges. Common in stainless and exotic alloy systems where the lap joint flange itself can be carbon.
Crosses
Equal and reducing crosses. Less common than tees but available across butt-weld and socket-weld configurations.
Nipples and Swages
Threaded and plain-end nipples, swage nipples for size transitions in small bore service. Concentric and eccentric profiles.
End Connections
Three Configurations
The end connection drives almost everything else - installation cost, leak path, fatigue life, and inspectability. Match the fitting type to the service, not just the pipe schedule.
ASME B16.9
Butt-Weld
Bevel-prepped ends welded full penetration to the pipe. Smooth bore, full strength, fully inspectable. Default for process and pipeline service at all pressures.
ASME B16.11
Socket-Weld
Pipe slips into a counterbore and is fillet welded externally. Common on small bore high pressure. Faster fit-up than butt-weld but a crevice exists at the socket bottom.
ASME B16.11
Threaded
NPT threaded ends in classes 2000, 3000, and 6000. Used where welding is restricted, on instrument tubing, and on utility piping. No welder qualification required for installation.
Schedules
Schedule 10 Through XXH
Wall thickness on a butt-weld fitting must match the pipe it joins. The schedule range below covers everything from light-gauge stainless utility through extra-heavy high- pressure process. If the line list calls out a schedule, we match it.
Light
Sch 5S, 10, 10S, 20
Standard
Sch 30, 40, 40S, STD
Heavy
Sch 60, 80, 80S, XH
Extra Heavy
Sch 100, 120, 140, 160, XXH
Schedule designations using the S suffix (5S, 10S, 40S, 80S) apply to stainless and follow a slightly different wall thickness table from the non-S equivalents at sizes above 12 inch. If you are working a stainless project, double-check the wall against the spec before ordering.
Custom Bends
Hot Induction Bends
Standard butt-weld elbows come in 1D, 1.5D, and 3D radii. When a project needs a 5D sweep, a non-standard angle, or a bend on heavy-wall pipe that cannot be field-bent, hot induction is the answer.
Induction bending heats a narrow band of the pipe to forming temperature while the pipe is pushed through a fixed-radius arm. The result is a smooth bend with minimal ovality, controlled wall thinning at the extrados, and consistent mechanical properties through the bent region. We source 3D, 5D, 7D, 10D, and custom radii in carbon, low- temp carbon, stainless, and alloy materials.
Radius Range
3D through 20D and beyond. Custom radii to drawing on request.
Angle Range
Any angle from a few degrees through 180. Tangent lengths to spec on both ends.
Size Range
Through 60 inch outside diameter. Heavy wall and pipeline grades supported.
Technical Resources
Reference Content
- Complete Guide to Flanges and Fittings - types, configurations, and selection logic.
- ASME Standards Reference - B16.5, B16.9, B16.11, and B16.47 overviews.
- Carbon Steel Grades - A105, A350, A234 WPB and friends.
- Pipe Schedule Tool - wall thickness lookup across all schedules.
Need Fittings to Match the Flanges?
One purchase order. One MTR package. One delivery. Send the BOM and we will quote it.