On this page 5 sections
Key features of slip-on flanges
- Slides over pipe, fillet-welded
- Easier alignment, lower cost
- Lower-pressure service
- Class 150 / 300 typical
Slip-On Flanges by material
Slip-On Flanges are available in the following grades. Select a grade for specifications and sizes.
Stainless Steel
- SS 304 Slip-On Flanges
- SS 304L Slip-On Flanges
- SS 304H Slip-On Flanges
- SS 309S Slip-On Flanges
- SS 310S Slip-On Flanges
- SS 316 Slip-On Flanges
- SS 316L Slip-On Flanges
- SS 316Ti Slip-On Flanges
- SS 317 Slip-On Flanges
- SS 317L Slip-On Flanges
- SS 321 Slip-On Flanges
- SS 321H Slip-On Flanges
- SS 347 Slip-On Flanges
- SS 347H Slip-On Flanges
- SS 410 Slip-On Flanges
- SS 904L Slip-On Flanges
- Duplex 2205 Slip-On Flanges
- Super Duplex 2507 Slip-On Flanges
- SS 254 SMO Slip-On Flanges
Nickel Alloys
- Inconel 600 Slip-On Flanges
- Inconel 601 Slip-On Flanges
- Inconel 625 Slip-On Flanges
- Inconel 718 Slip-On Flanges
- Incoloy 800 Slip-On Flanges
- Incoloy 800H Slip-On Flanges
- Incoloy 800HT Slip-On Flanges
- Incoloy 825 Slip-On Flanges
- Monel 400 Slip-On Flanges
- Hastelloy C22 Slip-On Flanges
- Hastelloy C276 Slip-On Flanges
- Nickel 200 Slip-On Flanges
- Nickel 201 Slip-On Flanges
Carbon Steel
Alloy Steel
Slip-On 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 slip-on 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 slip-on flanges?
The product specification for the grade, with dimensions to the relevant ASME or EN standard.
What are slip-on flanges used for?
Easier alignment, lower cost. They're easier to align and cheaper than weld-neck flanges, and suit lower-pressure utility and process lines.
Which materials are slip-on flanges available in?
Stainless steel, nickel alloys, carbon and alloy steel and non-ferrous metals, depending on the specification. See the material list above.