On this page 5 sections
Key features of socket weld flanges
- Small bore (typically ≤ NPS 4")
- Fillet-welded socket
- High-pressure service
- Not ideal for crevice-sensitive fluids
Socket Weld Flanges by material
Socket Weld Flanges are available in the following grades. Select a grade for specifications and sizes.
Stainless Steel
- SS 304 Socket Weld Flanges
- SS 304L Socket Weld Flanges
- SS 304H Socket Weld Flanges
- SS 309S Socket Weld Flanges
- SS 310S Socket Weld Flanges
- SS 316 Socket Weld Flanges
- SS 316L Socket Weld Flanges
- SS 316Ti Socket Weld Flanges
- SS 317 Socket Weld Flanges
- SS 317L Socket Weld Flanges
- SS 321 Socket Weld Flanges
- SS 321H Socket Weld Flanges
- SS 347 Socket Weld Flanges
- SS 347H Socket Weld Flanges
- SS 410 Socket Weld Flanges
- SS 904L Socket Weld Flanges
- Duplex 2205 Socket Weld Flanges
- Super Duplex 2507 Socket Weld Flanges
- SS 254 SMO Socket Weld Flanges
Nickel Alloys
- Inconel 600 Socket Weld Flanges
- Inconel 601 Socket Weld Flanges
- Inconel 625 Socket Weld Flanges
- Inconel 718 Socket Weld Flanges
- Incoloy 800 Socket Weld Flanges
- Incoloy 800H Socket Weld Flanges
- Incoloy 800HT Socket Weld Flanges
- Incoloy 825 Socket Weld Flanges
- Monel 400 Socket Weld Flanges
- Hastelloy C22 Socket Weld Flanges
- Hastelloy C276 Socket Weld Flanges
- Nickel 200 Socket Weld Flanges
- Nickel 201 Socket Weld Flanges
Carbon Steel
Alloy Steel
Socket Weld Flanges: sizes, finishes and testing
- Size range
- NPS ½" – 24" (B16.5), 26" – 60" (B16.47 Series A/B); Class 150, 300, 600, 900, 1500, 2500; EN 1092-1 PN 6 – PN 100 on request
- Finish
- Raised face (RF), flat face (FF) or ring-type joint (RTJ); serrated spiral or concentric face finish (typically 3.2 – 6.3 µm Ra)
- Ends
- Weld-neck bevel matched to pipe schedule; socket bore; threaded
Testing & documents
- Chemical and mechanical tests of the forging
- Dimensional inspection to ASME B16.5 / B16.47
- Hardness, impact and IGC tests as specified
- Ultrasonic testing of forgings on request
- EN 10204 3.1 certificate; 3.2 with third-party inspection
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Other flanges types
Frequently asked questions
What sizes are socket weld flanges available in?
NPS ½" – 24" (B16.5), 26" – 60" (B16.47 Series A/B); Class 150, 300, 600, 900, 1500, 2500; EN 1092-1 PN 6 – PN 100 on request.
Which specifications cover socket weld flanges?
The product specification for the grade, with dimensions to the relevant ASME or EN standard.
What are socket weld flanges used for?
Fillet-welded socket. They're used on small-bore, high-pressure lines up to about NPS 4".
Which materials are socket weld flanges available in?
Stainless steel, nickel alloys, carbon and alloy steel and non-ferrous metals, depending on the specification. See the material list above.