Stub ends
Lap-joint stub ends that let you use a carbon steel backing flange on stainless, duplex, titanium or nickel-alloy lines.
About stub ends
Only the stub end touches the fluid, so the loose backing flange can be a cheaper material. This saves a lot on exotic-alloy lines.
G is the lap diameter and F the length. Short pattern (MSS SP-43) saves weight; long pattern (ASME B16.9) gives a longer weld prep.
- MSS SP-43 short pattern
- ASME B16.9 long pattern
- Type A, B and C stub ends
- Stub ends with backing flanges as sets
What the dimensions mean
Every letter used in our tables, marked on the drawing.
- GLap outside diameter
- FLength, short (MSS SP-43) or long (B16.9)
Need stub ends? Get a price from the manufacturer.
Send size, schedule, grade and quantity. We usually reply within one working day.
Dimension finder
Pick a size to see the values on the drawing, then send it to us for a price.
Fitting dimension finder
Choose a fitting and size. The letters on the drawing show exactly what each ASME B16.9 dimension measures.
Dimensions in mm per ASME B16.9 (short stub end per MSS SP-43).
Dimension table
| Size | OD at bevel | Stub end lap Ø G | Stub end F, short / long | |
|---|---|---|---|---|
| 1/2" (15 NB) | 21.3 | 35 | 51 / 76 | Quote |
| 3/4" (20 NB) | 26.7 | 43 | 51 / 76 | Quote |
| 1" (25 NB) | 33.4 | 51 | 51 / 102 | Quote |
| 1-1/4" (32 NB) | 42.2 | 64 | 51 / 102 | Quote |
| 1-1/2" (40 NB) | 48.3 | 73 | 51 / 102 | Quote |
| 2" (50 NB) | 60.3 | 92 | 64 / 152 | Quote |
| 2-1/2" (65 NB) | 73.0 | 105 | 64 / 152 | Quote |
| 3" (80 NB) | 88.9 | 127 | 64 / 152 | Quote |
| 3-1/2" (90 NB) | 101.6 | 140 | 76 / 152 | Quote |
| 4" (100 NB) | 114.3 | 157 | 76 / 152 | Quote |
| 5" (125 NB) | 141.3 | 186 | 76 / 203 | Quote |
| 6" (150 NB) | 168.3 | 216 | 89 / 203 | Quote |
| 8" (200 NB) | 219.1 | 270 | 102 / 203 | Quote |
| 10" (250 NB) | 273.0 | 324 | 127 / 254 | Quote |
| 12" (300 NB) | 323.8 | 381 | 152 / 254 | Quote |
| 14" (350 NB) | 355.6 | 413 | 152 / 305 | Quote |
| 16" (400 NB) | 406.4 | 470 | 152 / 305 | Quote |
| 18" (450 NB) | 457.2 | 533 | 152 / 305 | Quote |
| 20" (500 NB) | 508.0 | 584 | 152 / 305 | Quote |
| 24" (600 NB) | 609.6 | 692 | 152 / 305 | Quote |
Dimensions in mm per ASME B16.9 (stub-end short pattern per MSS SP-43).
Grades
| Material | Fitting specification | Notes | |
|---|---|---|---|
| Carbon steel | ASTM A234 WPB, WPC | Seamless and welded | Quote |
| Low-temperature carbon steel | ASTM A420 WPL6, WPL3 | Impact tested to -46°C (WPL6) | Quote |
| High-yield pipeline | MSS SP-75 WPHY 42 to 70 | For API 5L line pipe | Quote |
| Chrome-moly | ASTM A234 WP5, WP9, WP11, WP22, WP91 | Normalised and tempered | Quote |
| Austenitic stainless | ASTM A403 WP304/304L, WP316/316L, WP321, WP347, WP310S | Class S, W and WX | Quote |
| Super-austenitic | ASTM A403 WP904L, WPS31254 (guide) | Seamless and welded | Quote |
| Duplex and super duplex | ASTM A815 WPS31803, WPS32205, WPS32750, WPS32760 (guide) | Ferrite and A923 tests on request | Quote |
| Titanium | ASTM B363 WPT1, WPT2, WPT7, WPT12 (guide) | Grade 5 on enquiry | Quote |
| Nickel alloys | ASTM B366 WPNCMC, WPNICMC, WPHC276, WPNC, WP20CB (guide) | Seamless and welded | Quote |
| Copper-nickel | 90/10 and 70/30 to EEMUA 146 or project spec (guide) | Seamless and welded | Quote |
Ends, marking, testing and packing
Ends and bevels
Bevelled to ASME B16.25, normally 37.5° ± 2.5° with a 1.6 mm root face, or to your weld-end detail. Wall thickness matched to the pipe schedule.
Marking
Each fitting is marked with Teshi mark, grade, size, schedule, heat number and standard, traceable to its material certificate.
Testing
- Dimensional and visual inspection
- PMI on alloy fittings
- RT of welded fittings (WX class), IGC for stainless
- Impact tests for WPL6 and WPHY
Finish and packing
Stainless and nickel alloys solution annealed, pickled and passivated. Carbon steel varnished or painted. Packed in wooden cases, seaworthy for export.
Questions buyers ask
Can you supply backing flanges with stub ends?
Yes. Lap joint flanges come from Teshi Fittings, matched and supplied as sets.
Get a quotation from the manufacturer
Send your BOQ, drawing or tender reference. You deal directly with the manufacturer.
- Reply from our estimation team, usually within one working day
- Carbon steel to titanium on one order
- EN 10204 3.1 or 3.2 certificates, third-party inspection welcome
- ISO 9001:2015 certified and IBR approved, since 1971
Drawings and BOQ spreadsheets are easiest by email. Mention your project name.