1. Technical drawings of ring joint facings for Class 300 ASME B16.5 Flanges.
2. Dimensions of ring joint facings for Class 300 Flange Joints and Groove.
| NPS | Groove Number | P inch mm | E inch mm | F inch mm | R inch mm | K inch mm | S inch mm |
|---|---|---|---|---|---|---|---|
| 1/2" | R11 | 1.344 34.14 | 0.219 5.54 | 0.281 7.14 | 0.03 0.8 | 2.00 51.0 | 0.12 3 |
| 3/4" | R13 | 1.688 42.88 | 0.250 6.35 | 0.344 8.74 | 0.03 0.8 | 2.50 63.5 | 0.16 4 |
| 1" | R16 | 2.000 50.80 | 0.250 6.35 | 0.344 8.74 | 0.03 0.8 | 2.75 70.0 | 0.16 4 |
| 1 1/4" | R18 | 2.375 60.33 | 0.250 6.35 | 0.344 8.74 | 0.03 0.8 | 3.12 79.5 | 0.16 4 |
| 1 1/2" | R20 | 2.688 68.27 | 0.250 6.35 | 0.344 8.74 | 0.03 0.8 | 3.56 90.5 | 0.16 4 |
| 2" | R23 | 3.250 82.55 | 0.312 7.92 | 0.469 11.91 | 0.03 0.8 | 4.25 108 | 0.22 6 |
| 2 1/2" | R26 | 4.000 101.60 | 0.312 7.92 | 0.469 11.91 | 0.03 0.8 | 5.00 127 | 0.22 6 |
| 3 1/2" | R34 | 5.188 131.78 | 0.312 7.92 | 0.469 11.91 | 0.03 0.8 | 6.25 159 | 0.22 6 |
| 4" | R37 | 5.875 149.23 | 0.312 7.92 | 0.469 11.91 | 0.03 0.8 | 6.88 175 | 0.22 6 |
| 5" | R41 | 7.125 180.98 | 0.312 7.92 | 0.469 11.91 | 0.03 0.8 | 8.25 210 | 0.22 6 |
| 6" | R45 | 8.312 211.12 | 0.312 7.92 | 0.469 11.91 | 0.03 0.8 | 9.50 241 | 0.22 6 |
| 8" | R49 | 10.625 269.88 | 0.312 7.92 | 0.469 11.91 | 0.03 0.8 | 11.88 302 | 0.22 6 |
| 10" | R53 | 12.750 323.85 | 0.312 7.92 | 0.469 11.91 | 0.03 0.8 | 14.00 356 | 0.22 6 |
| 12" | R57 | 15.000 381.00 | 0.312 7.92 | 0.469 11.91 | 0.03 0.8 | 16.25 413 | 0.22 6 |
| 14" | R61 | 15.625 419.10 | 0.312 7.92 | 0.469 11.91 | 0.03 0.8 | 18.00 457 | 0.22 6 |
| 16" | R65 | 17.875 469.90 | 0.312 7.92 | 0.469 11.91 | 0.03 0.8 | 20.00 508 | 0.22 6 |
| 18" | R69 | 20.375 533.40 | 0.312 7.92 | 0.469 11.91 | 0.03 0.8 | 22.62 575 | 0.22 6 |
| 20" | R73 | 22.000 584.20 | 0.375 9.53 | 0.531 13.49 | 0.06 1.5 | 25.00 635 | 0.22 6 |
| 24" | R77 | 26.500 692.15 | 0.438 11.13 | 0.656 16.66 | 0.06 1.5 | 29.50 749 | 0.25 6 |
1. NPS denotes nominal pipe size, P – pitch diameter, E – depth of the groove & height of the raised portion, F – top width of the groove, R – radius at bottom, K – diameter of raised portion, S – approximate distance between flanges. The 300# RTJ flange facings can be applied to various flange types including welding neck flange class 300, slip on flange 300#, Blind flange 300lb, etc.
2. All dimensions are provided in mm and inch unit. The depth of the groove, E, shall be furnished with the same dimension as the height of the raised portion. The groove number of ring joint facings for class 300 shall match the type R ring gaskets manufactured to ASME B16.20.
| Ring Joint Facings for ASME B16.5 Flanges Classified by Classes | ||||||
|---|---|---|---|---|---|---|
| Class 150 | Class 300 | Class 400 | Class 600 | Class 900 | Class 1500 | Class 2500 |
