Nickel Alloy Socket Weld Flanges
When assembling small-diameter, high-pressure piping systems where internal welding is impractical, Socket Weld Flanges (SWRF / SWRTJ) provide a highly reliable solution. 28Nickel manufactures precision-forged nickel alloy socket weld flanges designed to deliver robust structural strength and leak-proof performance in critical chemical instrumentation, hydraulic lines, and offshore processing networks.
Available Alloy Grades for Socket Weld Flanges
Small-bore piping is often highly susceptible to blockage and localized corrosion. We supply socket weld flanges forged from the industry's most advanced superalloys, ensuring your instrumentation and fluid transport lines remain clear and resilient against severe chemical attack and high temperatures.
Select a Grade to View Material Specs:
Engineering Profile of Socket Weld Flanges
The socket weld design offers unique assembly advantages for small-bore piping, eliminating internal weld spatter while providing fatigue strength greater than that of slip-on flanges.
Recessed Socket Design
The flange features a counter-bore (socket) that the pipe drops into. This recess provides perfect self-alignment, making it incredibly fast and easy for pipefitters to position and tack-weld the joint.
Clean Internal Bore
Because the flange is secured with a single continuous fillet weld on the outside, there is zero risk of weld spatter entering the pipe. This is critical for small hydraulic and instrumentation lines where debris could cause catastrophic blockages.
Small Bore Optimization
Socket weld flanges are specifically designed for small-diameter pipes, typically NPS 2" (DN 50) and smaller. They offer significantly higher static strength and fatigue life compared to standard slip-on flanges in these sizes.
Expansion Gap Consideration
During installation, a 1/16" (1.6mm) gap must be left between the pipe end and the bottom of the socket to prevent weld cracking from thermal expansion. Note: This gap can create a crevice, so it is not recommended for highly corrosive, stagnant media where crevice corrosion is a major concern.
| Specification Category | Details & Standards |
|---|---|
| Dimensional Standards | ASME / ANSI B16.5 |
| Common Pressure Classes | 150#, 300#, 600#, 900#, 1500# (Not typically used for 2500#) |
| Size Range | Typically 1/2" NB to 2" NB (Larger sizes generally utilize Weld Neck flanges). |
| Bore / Pipe Schedule | Crucial: The bore of a socket weld flange must match the Inner Diameter (ID) of the connecting pipe (e.g., Sch 40, Sch 80) to ensure a smooth fluid transition. |
| Flange Facing | Raised Face (SWRF), Flat Face (SWFF), Ring Type Joint (SWRTJ) |
Ready to Request a Quote?
When inquiring about Socket Weld Flanges, please specify the alloy grade (e.g., Monel 400), nominal pipe size (e.g., 1"), pressure class (e.g., 600#), and the pipe schedule to ensure the correct bore dimension. We supply full MTRs with all orders.
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