Ring Joint Gasket Dimensions Ring no. R41 Type R — ASME B16.20
Ring Joint Gasket Dimensions Ring no. R41 Type R to ASME B16.20: p — pitch dia 180.98 mm, a — width 11.13 mm, b — oval height 17.5 mm, h — octagonal height 16 mm, c — flat width 7.75 mm.
Dimensions of Ring Joint Gasket Dimensions Ring no. R41 Type R
| Symbol | Dimension | Value |
|---|---|---|
| · | P — Pitch dia | 180.98 mm (7.125 in) |
| · | A — Width | 11.13 mm (0.438 in) |
| · | B — Oval height | 17.5 mm (0.689 in) |
| · | H — Octagonal height | 16 mm (0.630 in) |
| · | C — Flat width | 7.75 mm (0.305 in) |
| · | Class 300–600 — NPS | 5" |
| · | Class 900 — NPS | 5" |
SKU TSH-GASKET-ASME-B16-20-TYPE-R-R41 · Standard ASME B16.20 · teshi-web
Purchase description
RING JOINT GASKET DIMENSIONS, Ring no. R41, TYPE R, SS316 + GRAPHITE, CS RINGS, ASME B16.20
Available materials: SS316 + graphite, CS rings, SS316 + PTFE, CNAF (non-asbestos), Neoprene / EPDM rubber, Soft iron / SS316 (ring joint).
Notes
- Dimensions are in millimetres unless stated otherwise.
- Ring number R30 is for lapped joints only.
- Confirm the ring number against the flange drawing before ordering.
Other sizes — Ring Joint Gasket Dimensions, Type R
Ring no. R11Ring no. R12Ring no. R13Ring no. R14Ring no. R15Ring no. R16Ring no. R17Ring no. R18Ring no. R19Ring no. R20Ring no. R21Ring no. R22Ring no. R23Ring no. R24Ring no. R25Ring no. R26Ring no. R27Ring no. R28Ring no. R29Ring no. R30 (lapped joint)Ring no. R31Ring no. R32Ring no. R33Ring no. R34Ring no. R35Ring no. R36Ring no. R37Ring no. R38Ring no. R39Ring no. R40Ring no. R42Ring no. R43Ring no. R44Ring no. R45Ring no. R46Ring no. R47Ring no. R48Ring no. R49Ring no. R50Ring no. R51Ring no. R52Ring no. R53Ring no. R54Ring no. R55Ring no. R56Ring no. R57Ring no. R58Ring no. R59Ring no. R60Ring no. R61Ring no. R62Ring no. R63Ring no. R64Ring no. R65Ring no. R66Ring no. R67Ring no. R68Ring no. R69Ring no. R70Ring no. R71Ring no. R72Ring no. R73Ring no. R74Ring no. R75Ring no. R76Ring no. R77Ring no. R78Ring no. R79
Frequently asked questions
What are the main types of pipe flanges?
Weld neck (WN), slip-on (SO), blind (BL), socket weld (SW), threaded (THD), lap joint (LJ) and plate flanges. Special types include orifice, long weld neck, reducing flanges and spectacle blinds.
When should I use a weld neck flange instead of a slip-on?
Use weld neck flanges for high pressure, high or cycling temperature, and lines with vibration or fatigue loading. The tapered hub and full-penetration butt weld spread stress smoothly. Slip-on flanges are cheaper and easier to align, but their fatigue life is roughly one third of a WN.
What does Class 150, 300 or 600 mean on a flange?
The ASME class is a pressure-rating designation, not a pressure in psi. The allowable pressure depends on the material group and temperature. A Class 150 A105 flange is rated 19.6 bar at 38 °C but 13.8 bar at 200 °C.
Is a 150# flange rated for 150 psi?
No. A Class 150 carbon-steel flange is rated about 285 psi (19.6 bar) at ambient temperature, and about 170 psi (11.7 bar) at 260 °C. The "150" is a class number.