ASME B16.9 Butt Weld Pipe Cap Dimensions
Length of ASME B16.9 butt weld pipe caps in millimetres from NPS ½" to 48". Length E applies up to the limiting wall thickness shown; for heavier walls the longer length E1 applies.
Caps close the end of a pipe run and are usually ellipsoidal in shape. Teshi Group manufactures caps as an OEM in ASTM A234 WPB, A403 stainless grades and alloy steel.
Key to dimensions
- OD
- Outside diameter at the bevel
- E
- Length for wall thickness up to the limiting value
- E1
- Length for wall thickness above the limiting value
ASME B16.9 Butt Weld Pipe Cap dimensions — tables
Butt weld caps (mm)
| NPSin | DN | ODat bevel | ELength | Limiting wallfor length E | E1Length, heavier wall |
|---|---|---|---|---|---|
| ½" | 15 | 21.3 | 25 | 4.57 | 25 |
| ¾" | 20 | 26.7 | 25 | 3.81 | 25 |
| 1" | 25 | 33.4 | 38 | 4.57 | 38 |
| 1¼" | 32 | 42.2 | 38 | 4.83 | 38 |
| 1½" | 40 | 48.3 | 38 | 5.08 | 38 |
| 2" | 50 | 60.3 | 38 | 5.59 | 44 |
| 2½" | 65 | 73.0 | 38 | 7.11 | 51 |
| 3" | 80 | 88.9 | 51 | 7.62 | 64 |
| 3½" | 90 | 101.6 | 64 | 8.13 | 76 |
| 4" | 100 | 114.3 | 64 | 8.64 | 76 |
| 5" | 125 | 141.3 | 76 | 9.65 | 89 |
| 6" | 150 | 168.3 | 89 | 10.92 | 102 |
| 8" | 200 | 219.1 | 102 | 12.70 | 127 |
| 10" | 250 | 273.0 | 127 | 12.70 | 152 |
| 12" | 300 | 323.8 | 152 | 12.70 | 178 |
| 14" | 350 | 355.6 | 165 | 12.70 | 191 |
| 16" | 400 | 406.4 | 178 | 12.70 | 203 |
| 18" | 450 | 457.0 | 203 | 12.70 | 229 |
| 20" | 500 | 508.0 | 229 | 12.70 | 254 |
| 22" | 550 | 559.0 | 254 | 12.70 | 254 |
| 24" | 600 | 610.0 | 267 | 12.70 | 305 |
| 26" | 650 | 660.0 | 267 | — | — |
| 28" | 700 | 711.0 | 267 | — | — |
| 30" | 750 | 762.0 | 267 | — | — |
| 32" | 800 | 813.0 | 267 | — | — |
| 34" | 850 | 864.0 | 267 | — | — |
| 36" | 900 | 914.0 | 267 | — | — |
| 38" | 950 | 965.0 | 305 | — | — |
| 40" | 1000 | 1016.0 | 305 | — | — |
| 42" | 1050 | 1067.0 | 305 | — | — |
| 44" | 1100 | 1118.0 | 343 | — | — |
| 46" | 1150 | 1168.0 | 343 | — | — |
| 48" | 1200 | 1219.0 | 343 | — | — |
Notes
- Dimensions are in millimetres unless stated otherwise.
- Above NPS 24" the standard lists a single length E.
Reference information compiled from the published standard for convenience. It does not replace the current edition of the governing standard, which takes precedence. Verify critical dimensions and properties before design, purchase or fabrication. Teshi Engineers & Sales Promoters (P) Ltd accepts no liability for errors or omissions.
Related products, data sheets and standards
Butt Weld Pipe Cap
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NPS ½"–48" · CS / SS / Alloy
OpenEquivalent and related standards to ASME B16.9 Butt Weld Pipe Cap Dimensions
All equivalents| Region | Standard | Relationship |
|---|---|---|
| Europe | EN 10253-2 / EN 10253-4 | Butt-welding fittings, carbon/alloy and stainless — Type B to ASME B16.9 dimensions |
| China | GB/T 12459 | Seamless butt-welding fittings — dimensions aligned with ASME B16.9 |
| China | GB/T 13401 | Welded butt-welding fittings from plate |
| China | SH/T 3408 | Petrochemical butt-welding fittings |
| Japan | JIS B2311 / B2312 / B2313 | Butt-welding fittings for ordinary use, for pressure use, and from plate |
| USA | MSS SP-75 | High-yield butt-welding fittings for pipelines |
| USA | ASME B16.28 (withdrawn) | Short-radius elbows, now in B16.9 |
Teshi Group manufactures flanges and fittings to all of these standards on request, including Chinese GB / HG / SH and European EN dimensions for export projects. Always confirm bolting, facing and thickness when substituting one standard for another.
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ASME B16.9 Butt Weld Pipe Cap Dimensions — size by size
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