Address
304 North Cardinal St.
Dorchester Center, MA 02124
Work Hours
Monday to Friday: 7AM - 7PM
Weekend: 10AM - 5PM
ASME B16.5-2003 flange dimensions in inches
ASME B16.5-2003 covers pressure-temperature ratings, materials, dimensions, tolerances, marking, testing and methods of designating openings for pipe flanges and flanged fittings. Included are flanges with rating class designations 150, 300, 400, 600, 900, 1500 and 2500 in sizes NPS 1/2 through NPS 24, with requirements given in both metric and U.S. Customary units, with diameter of bolts and flange bolt holes expressed in inch units.
The four tables below are the dimensional tables most often asked for with a flange enquiry: Class 150 (Table F8), Class 300 (Table F11), Class 600 (Table F16) and Class 900 (Table F18). All dimensions are in inches, as printed in the standard. A dash in the table means the standard does not tabulate a value at that size, and a cell reading “To be specified by Purchaser” means the dimension is deliberately left to the purchase order rather than fixed by the standard.
For sizes NPS 26 and larger, ASME B16.47 Series A and Series B apply instead of B16.5.
How to read these tables against a purchase order
Three column groups drive most of the ordering conversation.
- Outside diameter O and thickness tf are the dimensions a fabricator cuts to. They are fixed by the class and the size, so they are normally not an open item.
- Length through hub Y is given three ways, because a threaded or slip-on flange, a lapped flange and a welding neck flange each present a different hub length. Quoting the wrong one is the most common cause of a flange that will not mate.
- Bore B and corner radius r govern the bore geometry. Where the standard says “To be specified by Purchaser”, the bore has to be stated on the order instead.
Flange types covered by each table
Class 150 and Class 300 tables cover the full range of flange types: threaded, slip-on welding, lapped, socket welding (NPS 1/2 to NPS 3 only) and welding neck, together with the blind flange. The Class 600 and Class 900 tables are given for the types that those classes are normally produced in, and their notes point to the companion table for the remaining types.
Dimension tables
Table F8 — Dimensions of Class 150 Flanges
| NPS | O | tf | tf_lap | X | A | Ythr | Ylap | Ywn | T | Bso | Blp | Bwn | r | D |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1/2 | 3.50 | 0.38 | 0.44 | 1.19 | 0.84 | 0.56 | 0.62 | 1.81 | 0.62 | 0.88 | 0.90 | 0.62 | 0.12 | 0.38 |
| 3/4 | 3.88 | 0.44 | 0.50 | 1.50 | 1.05 | 0.56 | 0.62 | 2.00 | 0.62 | 1.09 | 1.11 | 0.82 | 0.12 | 0.44 |
| 1 | 4.25 | 0.50 | 0.56 | 1.94 | 1.32 | 0.62 | 0.69 | 2.12 | 0.69 | 1.36 | 1.38 | 1.05 | 0.12 | 0.50 |
| 1-1/4 | 4.62 | 0.56 | 0.62 | 2.31 | 1.66 | 0.75 | 0.81 | 2.19 | 0.81 | 1.70 | 1.72 | 1.38 | 0.19 | 0.56 |
| 1-1/2 | 5.00 | 0.62 | 0.69 | 2.56 | 1.90 | 0.81 | 0.88 | 2.38 | 0.88 | 1.95 | 1.97 | 1.61 | 0.25 | 0.62 |
| 2 | 6.00 | 0.69 | 0.75 | 3.06 | 2.38 | 0.94 | 1.00 | 2.44 | 1.00 | 2.44 | 2.46 | 2.07 | 0.31 | 0.69 |
| 2-1/2 | 7.00 | 0.81 | 0.88 | 3.56 | 2.88 | 1.06 | 1.12 | 2.69 | 1.12 | 2.94 | 2.97 | 2.47 | 0.31 | 0.75 |
| 3 | 7.50 | 0.88 | 0.94 | 4.25 | 3.50 | 1.12 | 1.19 | 2.69 | 1.19 | 3.57 | 3.60 | 3.07 | 0.38 | 0.81 |
| 3-1/2 | 8.50 | 0.88 | 0.94 | 4.81 | 4.00 | 1.19 | 1.25 | 2.75 | 1.25 | 4.07 | 4.10 | 3.55 | 0.38 | n/a |
| 4 | 9.00 | 0.88 | 0.94 | 5.31 | 4.50 | 1.25 | 1.31 | 2.94 | 1.31 | 4.57 | 4.60 | 4.03 | 0.44 | n/a |
| 5 | 10.00 | 0.88 | 0.94 | 6.44 | 5.56 | 1.38 | 1.44 | 3.44 | 1.44 | 5.66 | 5.69 | 5.05 | 0.44 | n/a |
| 6 | 11.00 | 0.94 | 1.00 | 7.56 | 6.63 | 1.50 | 1.56 | 3.44 | 1.56 | 6.72 | 6.75 | 6.07 | 0.50 | n/a |
| 8 | 13.50 | 1.06 | 1.12 | 9.69 | 8.63 | 1.69 | 1.75 | 3.94 | 1.75 | 8.72 | 8.75 | 7.98 | 0.50 | n/a |
| 10 | 16.00 | 1.12 | 1.19 | 12.00 | 10.75 | 1.88 | 1.94 | 3.94 | 1.94 | 10.88 | 10.92 | 10.02 | 0.50 | n/a |
| 12 | 19.00 | 1.19 | 1.25 | 14.38 | 12.75 | 2.12 | 2.19 | 4.44 | 2.19 | 12.88 | 12.92 | 12.00 | 0.50 | n/a |
| 14 | 21.00 | 1.31 | 1.38 | 15.75 | 14.00 | 2.19 | 3.12 | 4.94 | 2.25 | 14.14 | 14.18 | To be specified by Purchaser | 0.50 | n/a |
| 16 | 23.50 | 1.38 | 1.44 | 18.00 | 16.00 | 2.44 | 3.44 | 4.94 | 2.50 | 16.16 | 16.19 | To be specified by Purchaser | 0.50 | n/a |
| 18 | 25.00 | 1.50 | 1.56 | 19.88 | 18.00 | 2.62 | 3.81 | 5.44 | 2.69 | 18.18 | 18.20 | To be specified by Purchaser | 0.50 | n/a |
| 20 | 27.50 | 1.62 | 1.69 | 22.00 | 20.00 | 2.81 | 4.06 | 5.62 | 2.88 | 20.20 | 20.25 | To be specified by Purchaser | 0.50 | n/a |
| 24 | 32.00 | 1.81 | 1.88 | 26.12 | 24.00 | 3.19 | 4.38 | 5.94 | 3.25 | 24.25 | 24.25 | To be specified by Purchaser | 0.50 | n/a |
Column key: NPS = Nominal Pipe Size; O = Outside Diameter of Flange, O; tf = Thickness of Flange, Min., tf; tf_lap = Thickness of Lap Joint, Min.; X = Diameter of Hub, X; A = Diameter Beginning of Chamfer, Welding Neck, A; Ythr = Length Through Hub, Threaded / Slip-on / Socket Weld, Y; Ylap = Length Through Hub, Lapped, Y; Ywn = Length Through Hub, Welding Neck, Y; T = Thread Length, Threaded, Min., T; Bso = Bore, Slip-on / Socket Weld, Min., B; Blp = Bore, Lapped, Min., B; Bwn = Welding Neck / Socket Lapped Flange and Pipe, B; r = Corner Radius of Bore of Lapped Flange and Pipe, r; D = Depth of Socket, D
General notes:
- Dimensions of Table F8 are in inches.
- For tolerances, see para. 7.
- For facings, see para. 6.4.
- For flange bolt holes, see para. 6.5 and Table F7.
- For spot facing, see para. 6.6.
- For reducing threaded and slip-on flanges, see Table F6.
- Blind flanges may be made with or without hubs at the manufacturer’s option.
- For reducing welding neck flanges, see para. 6.8.
- Note (1): This dimension is for large end of hub, which may be straight or tapered. Taper shall not exceed 7 deg on threaded, slip-on, socket-welding, and lapped flanges.
- Note (7): For sizes where the value is "To be specified by Purchaser", the dimension is not fixed by the standard and must be stated on the purchase order.
Table F11 — Dimensions of Class 300 Flanges
| NPS | O | tf | tf_lap | X | A | Ythr | Ylap | Ywn | T | Bso | Blp | Bwn | r | Q | D |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1/2 | 3.75 | 0.50 | 0.56 | 1.50 | 0.84 | 0.81 | 0.88 | 2.00 | 0.62 | 0.88 | 0.90 | 0.62 | 0.12 | 0.93 | 0.38 |
| 3/4 | 4.62 | 0.56 | 0.62 | 1.88 | 1.05 | 0.94 | 1.00 | 2.19 | 0.62 | 1.09 | 1.11 | 0.82 | 0.12 | 1.14 | 0.44 |
| 1 | 4.88 | 0.62 | 0.69 | 2.12 | 1.32 | 1.00 | 1.06 | 2.38 | 0.69 | 1.36 | 1.38 | 1.05 | 0.12 | 1.41 | 0.50 |
| 1-1/4 | 5.25 | 0.69 | 0.75 | 2.50 | 1.66 | 1.00 | 1.06 | 2.50 | 0.81 | 1.70 | 1.72 | 1.38 | 0.19 | 1.75 | 0.56 |
| 1-1/2 | 6.12 | 0.75 | 0.81 | 2.75 | 1.90 | 1.13 | 1.19 | 2.63 | 0.88 | 1.95 | 1.97 | 1.61 | 0.25 | 1.98 | 0.62 |
| 2 | 6.50 | 0.81 | 0.88 | 3.31 | 2.38 | 1.25 | 1.31 | 2.69 | 1.12 | 2.44 | 2.46 | 2.07 | 0.31 | 2.50 | 0.69 |
| 2-1/2 | 7.50 | 0.94 | 1.00 | 3.94 | 2.88 | 1.44 | 1.50 | 2.94 | 1.25 | 2.94 | 2.97 | 2.47 | 0.31 | 3.00 | 0.75 |
| 3 | 8.25 | 1.06 | 1.12 | 4.62 | 3.50 | 1.63 | 1.69 | 3.06 | 1.25 | 3.57 | 3.60 | 3.07 | 0.38 | 3.63 | 0.81 |
| 3-1/2 | 9.00 | 1.12 | 1.19 | 5.25 | 4.00 | 1.69 | 1.75 | 3.13 | 1.44 | 4.07 | 4.10 | 3.55 | 0.38 | 4.13 | n/a |
| 4 | 10.00 | 1.19 | 1.25 | 5.75 | 4.50 | 1.82 | 1.88 | 3.32 | 1.44 | 4.57 | 4.60 | 4.03 | 0.44 | 4.63 | n/a |
| 5 | 11.00 | 1.31 | 1.38 | 7.00 | 5.56 | 1.94 | 2.00 | 3.82 | 1.69 | 5.66 | 5.69 | 5.05 | 0.44 | 5.69 | n/a |
| 6 | 12.50 | 1.38 | 1.44 | 8.12 | 6.63 | 2.00 | 2.06 | 3.82 | 1.81 | 6.72 | 6.75 | 6.07 | 0.50 | 6.75 | n/a |
| 8 | 15.00 | 1.56 | 1.62 | 10.25 | 8.63 | 2.38 | 2.44 | 4.32 | 2.00 | 8.72 | 8.75 | 7.98 | 0.50 | 8.75 | n/a |
| 10 | 17.50 | 1.81 | 1.88 | 12.62 | 10.75 | 2.56 | 3.75 | 4.56 | 2.19 | 10.88 | 10.92 | 10.02 | 0.50 | 10.88 | n/a |
| 12 | 20.50 | 1.94 | 2.00 | 14.75 | 12.75 | 2.82 | 4.00 | 5.06 | 2.38 | 12.88 | 12.92 | 12.00 | 0.50 | 12.94 | n/a |
| 14 | 23.00 | 2.06 | 2.12 | 16.75 | 14.00 | 2.94 | 4.38 | 5.56 | 2.50 | 14.14 | 14.18 | To be specified by Purchaser | 0.50 | 14.19 | n/a |
| 16 | 25.50 | 2.19 | 2.25 | 19.00 | 16.00 | 3.19 | 4.75 | 5.69 | 2.69 | 16.16 | 16.19 | To be specified by Purchaser | 0.50 | 16.19 | n/a |
| 18 | 28.00 | 2.31 | 2.38 | 21.00 | 18.00 | 3.44 | 5.12 | 6.19 | 2.75 | 18.18 | 18.20 | To be specified by Purchaser | 0.50 | 18.19 | n/a |
| 20 | 30.50 | 2.44 | 2.50 | 23.12 | 20.00 | 3.69 | 5.50 | 6.32 | 2.88 | 20.20 | 20.25 | To be specified by Purchaser | 0.50 | 20.19 | n/a |
| 24 | 36.00 | 2.69 | 2.75 | 27.62 | 24.00 | 4.13 | 6.00 | 6.56 | 3.25 | 24.25 | 24.25 | To be specified by Purchaser | 0.50 | 24.19 | n/a |
Column key: NPS = Nominal Pipe Size; O = Outside Diameter of Flange, O; tf = Thickness of Flange, Min., tf; tf_lap = Thickness of Lap Joint, Min.; X = Diameter of Hub, X; A = Diameter Beginning of Chamfer, Welding Neck, A; Ythr = Length Through Hub, Threaded / Slip-on / Socket Weld, Y; Ylap = Length Through Hub, Lapped, Y; Ywn = Length Through Hub, Welding Neck, Y; T = Thread Length, Threaded, Min., T; Bso = Bore, Slip-on / Socket Weld, Min., B; Blp = Bore, Lapped, Min., B; Bwn = Welding Neck / Socket Lapped Flange and Pipe, B; r = Corner Radius of Bore of Lapped Flange and Pipe, r; Q = Counterbore Threaded Flange, Min., Q; D = Depth of Socket, D
General notes:
- Dimensions of Table F11 are in inches.
- For tolerances, see para. 7.
- For facings, see para. 6.4.
- For flange bolt holes, see para. 6.5 and Table F10.
- For spot facing, see para. 6.6.
- For reducing threaded and slip-on flanges, see Table F6.
- Blind flanges may be made with or without hubs at the manufacturer’s option.
- For reducing welding neck flanges, see para. 6.8.
- Note (6): For sizes where the value is "To be specified by Purchaser", the dimension is not fixed by the standard and must be stated on the purchase order.
Table F16 — Dimensions of Class 600 Flanges
| NPS | O | tf | X | A | Ythr | Ylap | Ywn | T | Bso | Blp | Bwn | r | Q | D |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1/2 | 3.75 | 0.56 | 1.50 | 0.84 | 0.88 | 0.88 | 2.06 | 0.62 | 0.88 | 0.90 | To be specified by Purchaser | 0.12 | 0.93 | 0.38 |
| 3/4 | 4.62 | 0.62 | 1.88 | 1.05 | 1.00 | 1.00 | 2.25 | 0.62 | 1.09 | 1.11 | To be specified by Purchaser | 0.12 | 1.14 | 0.44 |
| 1 | 4.88 | 0.69 | 2.12 | 1.32 | 1.06 | 1.06 | 2.44 | 0.69 | 1.36 | 1.38 | To be specified by Purchaser | 0.12 | 1.41 | 0.50 |
| 1-1/4 | 5.25 | 0.81 | 2.50 | 1.66 | 1.12 | 1.12 | 2.62 | 0.81 | 1.70 | 1.72 | To be specified by Purchaser | 0.19 | 1.75 | 0.56 |
| 1-1/2 | 6.12 | 0.88 | 2.75 | 1.90 | 1.25 | 1.25 | 2.75 | 0.88 | 1.95 | 1.97 | — | 0.25 | 1.99 | 0.62 |
| 2 | 6.50 | 1.00 | 3.31 | 2.38 | 1.44 | 1.44 | 2.88 | 1.12 | 2.44 | 2.46 | — | 0.31 | 2.50 | 0.69 |
| 2-1/2 | 7.50 | 1.12 | 3.94 | 2.88 | 1.62 | 1.62 | 3.12 | 1.25 | 2.94 | 2.97 | — | 0.31 | 3.00 | 0.75 |
| 3 | 8.25 | 1.25 | 4.62 | 3.50 | 1.81 | 1.81 | 3.25 | 1.38 | 3.57 | 3.60 | — | 0.38 | 3.63 | 0.81 |
| 3-1/2 | 9.00 | 1.38 | 5.25 | 4.00 | 1.94 | 1.94 | 3.38 | 1.56 | 4.07 | 4.10 | — | 0.38 | 4.13 | n/a |
| 4 | 10.75 | 1.50 | 6.00 | 4.50 | 2.12 | 2.12 | 4.00 | 1.62 | 4.57 | 4.60 | — | 0.44 | 4.63 | n/a |
| 5 | 13.00 | 1.75 | 7.44 | 5.56 | 2.38 | 2.38 | 4.50 | 1.88 | 5.66 | 5.69 | — | 0.44 | 5.69 | n/a |
| 6 | 14.00 | 1.88 | 8.75 | 6.63 | 2.62 | 2.62 | 4.62 | 2.00 | 6.72 | 6.75 | — | 0.50 | 6.75 | n/a |
| 8 | 16.50 | 2.19 | 10.75 | 8.63 | 3.00 | 3.00 | 5.25 | 2.25 | 8.72 | 8.75 | — | 0.50 | 8.75 | n/a |
| 10 | 20.00 | 2.50 | 13.50 | 10.75 | 3.38 | 4.38 | 6.00 | 2.56 | 10.88 | 10.92 | — | 0.50 | 10.88 | n/a |
| 12 | 22.00 | 2.62 | 15.75 | 12.75 | 3.62 | 4.62 | 6.12 | 2.75 | 12.88 | 12.92 | — | 0.50 | 12.94 | n/a |
| 14 | 23.75 | 2.75 | 17.00 | 14.00 | 3.69 | 5.00 | 6.50 | 2.88 | 14.14 | 14.18 | — | 0.50 | 14.19 | n/a |
| 16 | 27.00 | 3.00 | 19.50 | 16.00 | 4.19 | 5.50 | 7.00 | 3.06 | 16.16 | 16.19 | — | 0.50 | 16.19 | n/a |
| 18 | 29.25 | 3.25 | 21.50 | 18.00 | 4.62 | 6.00 | 7.25 | 3.12 | 18.18 | 18.20 | — | 0.50 | 18.19 | n/a |
| 20 | 32.00 | 3.50 | 24.00 | 20.00 | 5.00 | 6.50 | 7.50 | 3.25 | 20.20 | 20.25 | — | 0.50 | 20.19 | n/a |
| 24 | 37.00 | 4.00 | 28.25 | 24.00 | 5.50 | 7.25 | 8.00 | 3.62 | 24.25 | 24.25 | — | 0.50 | 24.19 | n/a |
Column key: NPS = Nominal Pipe Size; O = Outside Diameter of Flange, O; tf = Thickness of Flange, Min., tf; X = Diameter of Hub, X; A = Hub Diameter Beginning of Chamfer, Welding Neck, A; Ythr = Length Through Hub, Threaded / Slip-on / Socket Weld, Y; Ylap = Length Through Hub, Lapped, Y; Ywn = Length Through Hub, Welding Neck, Y; T = Thread Length, Threaded Flange, Min., T; Bso = Bore, Slip-on / Socket Weld, Min., B; Blp = Bore, Lapped, Min., B; Bwn = Welding Neck / Socket Welding, B; r = Corner Radius of Bore of Lapped Flange and Pipe, r; Q = Counterbore Threaded Flange, Min., Q; D = Depth of Socket, D
General notes:
- Dimensions of Table F16 are in inches.
- For other dimensions, see Table F18 and F19.
- For welding end bevel, see para. 6.7.
- For threads in threaded flanges, see para. 6.9.
- Note (2): For welding end bevel, see para. 6.7.
- Note (3): For threads in threaded flanges, see para. 6.9.
- Note (7): For sizes where the value is "To be specified by Purchaser", the dimension is not fixed by the standard and must be stated on the purchase order.
Table F18 — Dimensions of Class 900 Flanges
| NPS | O | tf | X | A | Ythr | Ylap | Ywn | T | Bso | Blp | Bwn | r | Q |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 3 | 9.50 | 1.50 | 5.00 | 3.50 | 2.12 | 2.12 | 4.00 | 1.62 | 3.57 | 3.60 | To be specified by Purchaser | 0.38 | 3.63 |
| 4 | 11.50 | 1.75 | 6.25 | 4.50 | 2.75 | 2.75 | 4.50 | 1.88 | 4.57 | 4.60 | To be specified by Purchaser | 0.44 | 4.63 |
| 5 | 13.75 | 2.00 | 7.50 | 5.56 | 3.12 | 3.12 | 5.00 | 2.12 | 5.66 | 5.69 | To be specified by Purchaser | 0.44 | 5.69 |
| 6 | 15.00 | 2.19 | 9.25 | 6.63 | 3.38 | 3.38 | 5.50 | 2.25 | 6.72 | 6.75 | — | 0.50 | 6.75 |
| 8 | 18.50 | 2.50 | 11.75 | 8.63 | 4.00 | 4.50 | 6.38 | 2.50 | 8.72 | 8.75 | — | 0.50 | 8.75 |
| 10 | 21.50 | 2.75 | 14.50 | 10.75 | 4.25 | 5.00 | 7.25 | 2.81 | 10.88 | 10.92 | — | 0.50 | 10.88 |
| 12 | 24.00 | 3.12 | 16.50 | 12.75 | 4.62 | 5.62 | 7.88 | 3.00 | 12.88 | 12.92 | — | 0.50 | 12.94 |
| 14 | 25.25 | 3.38 | 17.75 | 14.00 | 5.12 | 6.12 | 8.38 | 3.25 | 14.14 | 14.18 | — | 0.50 | 14.19 |
| 16 | 27.75 | 3.50 | 20.00 | 16.00 | 5.25 | 6.50 | 8.50 | 3.38 | 16.16 | 16.19 | — | 0.50 | 16.19 |
| 18 | 31.00 | 4.00 | 22.25 | 18.00 | 6.00 | 7.50 | 9.00 | 3.50 | 18.18 | 18.20 | — | 0.50 | 18.19 |
| 20 | 33.75 | 4.25 | 24.50 | 20.00 | 6.25 | 8.25 | 9.75 | 3.62 | 20.20 | 20.25 | — | 0.50 | 20.19 |
| 24 | 41.00 | 5.50 | 29.50 | 24.00 | 8.00 | 10.50 | 11.50 | 4.00 | 24.25 | 24.25 | — | 0.50 | 24.19 |
Column key: NPS = Nominal Pipe Size; O = Outside Diameter of Flange, O; tf = Thickness of Flange, Min., tf; X = Diameter of Hub, X; A = Hub Diameter Beginning of Chamfer, Welding Neck, A; Ythr = Length Through Hub, Threaded / Slip-on, Y; Ylap = Length Through Hub, Lapped, Y; Ywn = Length Through Hub, Welding Neck, Y; T = Thread Length, Threaded Flange, Min., T; Bso = Bore, Slip-on, Min., B; Blp = Bore, Lapped, Min., B; Bwn = Welding Neck, B; r = Corner Radius of Bore of Lapped Flange and Pipe, r; Q = Counterbore Threaded Flange, Min., Q
General notes:
- Dimensions of Table F18 are in inches.
- For other dimensions, see Table F20.
- For welding end bevel, see para. 6.7.
- For threads in threaded flanges, see para. 6.9.
- Note (4): Socket welding flanges may be provided in NPS 1/2 through 2 1/2 using Class 1500 dimensions.
- Note (7): For sizes where the value is "To be specified by Purchaser", the dimension is not fixed by the standard and must be stated on the purchase order.
Material and specification note
These tables are dimensional only. The material specification governs the grade: ASME SB-462 covers forged or rolled nickel alloy pipe flanges, forged fittings and valves for corrosive high-temperature service, and ASME SB-564 covers nickel alloy forgings. ASME SA-182 covers forged ferritic and austenitic alloy steel flanges for general service, and ASME SA-105 covers carbon steel and alloy steel forgings. A flange dimensioned to B16.5 can be made in several different alloys, so the material line on the order has to name the specification and the grade.
Ordering information to send with an enquiry
To get a quotation that matches the flange you need, the enquiry should state:
- Nominal pipe size and the class (150, 300, 600, 900 and so on).
- Flange type: threaded, slip-on welding, lapped, socket welding or welding neck.
- Facing: flat face, raised face, ring type joint, or tongue and groove.
- Material specification and grade, for example ASME SB-462 with the grade covering the alloy in question.
- Bore dimension, where the table says “To be specified by Purchaser”.
- Any dimensional deviation from the standard, stated as a requirement on the purchase order.
Nickel alloy pipe flanges and forged nickel alloy fittings are supplied against the dimensional tables above. For the flange standard boundary at NPS 26 and above, see ASME B16.5 or B16.47: which flange standard applies at what size. For socket weld and threaded fitting dimensions see ASME B16.11 socket weld and threaded fitting dimensions, and for the selection rules between B16.9, B16.11 and MSS SP-43 see stainless fittings: B16.9, B16.11 and MSS SP-43 explained. Nickel alloy flanges in Hastelloy C-276, C-22 and Alloy 2000 are listed under forged flanges and fittings to SB-462, and the flange range is indexed at nickel alloy flanges. Send the size, class, type, facing and material line through the contact page for a quotation.
