On this page 5 sections
Key features of stub ends
- MSS SP-43 (short, Type A) and ASME B16.9 (long)
- Used with lap-joint flanges
- Economical for high-alloy systems
- Allows flange bolt-hole alignment
Stub Ends by material
Stub Ends are available in the following grades. Select a grade for specifications and sizes.
Stainless Steel
- SS 304 Stub Ends
- SS 304L Stub Ends
- SS 304H Stub Ends
- SS 309S Stub Ends
- SS 310S Stub Ends
- SS 316 Stub Ends
- SS 316L Stub Ends
- SS 316Ti Stub Ends
- SS 317 Stub Ends
- SS 317L Stub Ends
- SS 321 Stub Ends
- SS 321H Stub Ends
- SS 347 Stub Ends
- SS 347H Stub Ends
- SS 904L Stub Ends
- Duplex 2205 Stub Ends
- Super Duplex 2507 Stub Ends
- SS 254 SMO Stub Ends
Nickel Alloys
- Inconel 600 Stub Ends
- Inconel 601 Stub Ends
- Inconel 625 Stub Ends
- Incoloy 800 Stub Ends
- Incoloy 800H Stub Ends
- Incoloy 800HT Stub Ends
- Incoloy 825 Stub Ends
- Monel 400 Stub Ends
- Hastelloy C22 Stub Ends
- Hastelloy C276 Stub Ends
- Nickel 200 Stub Ends
- Nickel 201 Stub Ends
Carbon Steel
Alloy Steel
Non-Ferrous Metals
Stub Ends: sizes, finishes and testing
- Size range
- Butt-weld ½" – 48" (larger fabricated to order) in schedules matching the pipe; socket-weld and threaded ⅛" – 4" in Class 2000, 3000, 6000 and 9000
- Finish
- Annealed & pickled, shot-blasted, black painted or galvanised (by material)
- Ends
- Bevelled (butt-weld), socket-weld, threaded NPT/BSP
Testing & documents
- Chemical and mechanical tests of the starting material
- Dimensional inspection to B16.9 / B16.11
- Radiography of welded fittings (seamed WPW/WX)
- Hardness, IGC and impact tests as specified
- EN 10204 3.1 certificate; 3.2 with third-party inspection
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Other fittings types
Frequently asked questions
What sizes are stub ends available in?
Butt-weld ½" – 48" (larger fabricated to order) in schedules matching the pipe; socket-weld and threaded ⅛" – 4" in Class 2000, 3000, 6000 and 9000.
Which specifications cover stub ends?
MSS SP-43 (short, Type A) and ASME B16.9 (long).
What are stub ends used for?
Used with lap-joint flanges. That makes it an economical choice for stainless and nickel-alloy systems.
Which materials are stub ends available in?
Stainless steel, nickel alloys, carbon and alloy steel and non-ferrous metals, depending on the specification. See the material list above.