ASME B16.48 Spade & Ring Spacer Dimensions
This chart gives ASME B16.48 spade and ring spacer dimensions in millimetres for Class 150 raised-face flanges — outside diameter, spacer bore, centre to handle end, thickness and handle width. A spade (paddle blank) isolates the line; the matching ring spacer keeps the gap when the line is in service.
Teshi Group manufactures spades, ring spacers and spectacle blinds in India.
Key to dimensions
- A
- Outside diameter
- B
- Inside diameter of the ring spacer
- C
- Centre to handle end
- t
- Thickness
- W
- Handle width
ASME B16.48 Spade & Ring Spacer Dimensions — tables
Spade and ring spacer — Class 150 (mm)
| NPS | AOutside dia · mm | BSpacer inside dia · mm | CCentre to handle end · mm | tThickness · mm | WHandle width · mm |
|---|---|---|---|---|---|
| 1/2" | 45 | 16 | 126 | 3 | 32 |
| 3/4" | 54 | 21 | 131 | 3 | 32 |
| 1" | 64 | 27 | 136 | 3 | 32 |
| 1 1/4" | 73 | 42 | 145 | 6.4 | 32 |
| 1 1/2" | 83 | 48 | 145 | 6.4 | 32 |
| 2" | 102 | 61 | 155 | 6.4 | 32 |
| 2 1/2" | 107 | 73 | 170 | 6.4 | 32 |
| 3" | 133 | 89 | 170 | 6.4 | 32 |
| 3 1/2" | 159 | 102 | 202 | 9.7 | 38 |
| 4" | 172 | 114 | 202 | 9.7 | 38 |
| 5" | 194 | 141 | 225 | 9.7 | 38 |
| 6" | 219 | 168 | 225 | 12.7 | 38 |
| 8" | 276 | 219 | 267 | 12.7 | 38 |
| 10" | 337 | 273 | 322 | 15.7 | 44 |
| 12" | 406 | 324 | 357 | 19.1 | 44 |
| 14" | 448 | 356 | 378 | 19.1 | 44 |
| 16" | 511 | 406 | 410 | 22.4 | 44 |
| 18" | 546 | 457 | 427 | 25.4 | 51 |
| 20" | 603 | 508 | 455 | 28.4 | 51 |
| 24" | 714 | 610 | 512 | 31.8 | 51 |
Notes
- All dimensions are in millimetres.
- Spade = solid paddle (B not applicable); the ring spacer uses bore B. C is the centre-to-handle-end dimension.
- Reference values for estimation and checking. Verify against the current edition of the standard and the purchase specification 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.
FAQ
ASME B16.48 Spade & Ring Spacer dimensions: common questions
When is a spade used instead of a spectacle blind?
On larger sizes, where a one-piece spectacle blind becomes too heavy to rotate, the blank and spacer are supplied as two separate pieces — the spade and the ring spacer.
Related products, data sheets and standards
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