PN40 Flange Dimensions DN 25 — EN 1092-1
PN40 Flange Dimensions DN 25 to EN 1092-1: a — pipe od 33.7 mm, d — flange od 115 mm, k — bolt circle 85 mm, l — hole dia 14 mm, n — bolts 4.
Dimensions of PN40 Flange Dimensions DN 25
| Symbol | Dimension | Value |
|---|---|---|
| · | A — Pipe OD | 33.7 mm (1.327 in) |
| · | D — Flange OD | 115 mm (4.528 in) |
| · | K — Bolt circle | 85 mm (3.346 in) |
| · | L — Hole dia | 14 mm (0.551 in) |
| · | n — Bolts | 4 |
| · | Bolt — Size | M12 |
| · | C1 — Plate flange | 16 mm (0.630 in) |
| · | C2 — Weld neck / blind | 16 mm (0.630 in) |
SKU TSH-FLANGE-EN-1092-1-25 · Standard EN 1092-1 · teshi-web
Purchase description
PN40 FLANGE DIMENSIONS, DN 25, ASTM A105N, EN 1092-1
Available materials: ASTM A105N, ASTM A350 LF2 Cl 1, ASTM A182 F304/304L, ASTM A182 F316/316L, ASTM A182 F11 Cl 2, ASTM A182 F22 Cl 3, ASTM A182 F51 (Duplex), ASTM A182 F53 (Super Duplex), ASTM A694 F52 / F60, IS 2062 E250 (plate).
Notes
- All dimensions are in millimetres.
- Flange outside diameter, bolt circle and drilling are common to all EN 1092-1 flange types of the same DN and PN, so flanges of different types mate with each other.
- Bolt sizes are metric (ISO). Bolt holes are 2–6 mm larger than the bolt, as tabulated.
- C1 applies to plate flanges (Type 01); C2 to weld neck (Type 11) and blind (Type 05) flanges. Thickness excludes the raised face.
- Up to DN 150, PN25 and PN40 flanges share the same dimensions; from DN 200 they differ.
Other sizes — PN40 Flange Dimensions, Standard
DN 10DN 15DN 20DN 32DN 40DN 50DN 65DN 80DN 100DN 125DN 150DN 200DN 250DN 300DN 350DN 400DN 450DN 500DN 600
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.