MSS SP-83 Union Dimensions
This chart gives MSS SP-83 Class 3000 threaded union dimensions in millimetres. MSS SP-83 covers forged carbon and stainless steel socket-weld and threaded unions.
Teshi Group manufactures forged unions in India in A105, A350 LF2, A182 stainless and duplex grades.
Key to dimensions
- L
- Laying length
- A–N
- Other dimensions as lettered in MSS SP-83
MSS SP-83 Union Dimensions — tables
MSS SP-83 threaded unions, Class 3000 (mm)
| NPS | Amin | Cmin | Dmax | Dmin | Fmin | Gmin | Jmin | LLaying length | N |
|---|---|---|---|---|---|---|---|---|---|
| 1/8 | 14.7 | 2.41 | 8.43 | 6.43 | 3.18 | 3.18 | 1.24 | 41.4 | 50.8 |
| 1/4 | 19 | 3.02 | 11.13 | 9.45 | 3.18 | 3.18 | 1.24 | 41.4 | 50.8 |
| 3/8 | 22.9 | 3.2 | 14.27 | 13.51 | 3.43 | 3.43 | 1.37 | 46 | 55.9 |
| 1/2 | 27.7 | 3.73 | 17.86 | 17.07 | 3.68 | 3.68 | 1.5 | 49 | 58.4 |
| 3/4 | 33.5 | 3.91 | 23.01 | 21.39 | 4.06 | 4.06 | 1.68 | 56.9 | 66 |
| 1 | 41.4 | 4.55 | 28.98 | 27.74 | 4.57 | 4.45 | 1.85 | 62 | 78.7 |
| 1 1/4 | 50.5 | 4.85 | 37.69 | 35.36 | 5.33 | 5.21 | 2.13 | 71.1 | 94 |
| 1 1/2 | 57.2 | 5.08 | 43.54 | 41.20 | 5.84 | 5.59 | 2.31 | 76.5 | 111.8 |
| 2 | 70.1 | 5.54 | 55.58 | 52.12 | 6.6 | 6.35 | 2.69 | 86.1 | 132.1 |
| 2 1/2 | 85.3 | 7.01 | 66.27 | 64.31 | 7.49 | 7.11 | 3.07 | 102.4 | 149.9 |
| 3 | 102.4 | 7.62 | 88.25 | 77.27 | 8.26 | 8 | 3.53 | 109 | 175.3 |
Notes
- All dimensions are in millimetres; letters follow the MSS SP-83 figure.
- Values are nominal, compiled from published copies of the standard; blank cells (—) are values not confirmed from the sources available. Verify against the current edition before design, purchase or fabrication.
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.
Dimension finder
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MSS SP-83 Union Dimensions — size by size
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Equivalent and related standards to MSS SP-83 Union Dimensions
All equivalents| Region | Standard | Relationship |
|---|---|---|
| USA | MSS SP-79 / SP-83 / SP-95 / SP-97 | Inserts, unions, swage nipples and integrally reinforced branch outlets |
| China | GB/T 14383 | Forged steel socket-welding and threaded fittings — ASME B16.11 dimensions |
| China | SH/T 3410 | Petrochemical forged fittings |
| Japan | JIS B2316 | Steel socket-welding pipe fittings |
| UK | BS 3799 | Steel pipe fittings, screwed and socket-welding (withdrawn) |
| India | IS 1239-2 | Mild steel tubular and threaded fittings |
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.
FAQ
MSS SP-83 Union dimensions: common questions
What is MSS SP-83?
MSS SP-83 is the standard for Class 3000 and 6000 forged steel pipe unions, socket-weld and threaded.
Does Teshi Group make SP-83 unions?
Yes — forged socket-weld and threaded unions to MSS SP-83 in carbon, low-temperature, alloy and stainless steel.
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