IS 1538 Tables 4 & 6 80 flanges of pipes and fittings: dimensions and standard drilling — IS 1538
IS 1538 Tables 4 & 6 80 flanges of pipes and fittings: dimensions and standard drilling to IS 1538: d — flange od 200 mm, c — flange 21 mm, k — bolt circle 160 mm, n — bolts 4, l — hole dia 19 mm.
Dimensions of IS 1538 Tables 4 & 6 80 flanges of pipes and fittings: dimensions and standard drilling
| Symbol | Dimension | Value |
|---|---|---|
| · | D — Flange OD | 200 mm (7.874 in) |
| · | C — Flange | 21 mm (0.827 in) |
| · | K — Bolt circle | 160 mm (6.299 in) |
| · | n — Bolts | 4 |
| · | L — Hole dia | 19 mm (0.748 in) |
| · | Bolt — Dia | 16 |
SKU TSH-FLANGE-IS-1538-FLANGES-OF-PIPES-AND-FITTINGS-DIMENSIONS-AND-STANDARD-DRILLING-80 · Standard IS 1538 · teshi-web
Purchase description
IS 1538 TABLES 4 & 6, 80, FLANGES OF PIPES AND FITTINGS: DIMENSIONS AND STANDARD DRILLING, ASTM A105N, IS 1538
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.
- IS 1538 has a single flange series (no separate PN tables). Bolt holes are drilled off-centres unless otherwise specified.
- Raised flanges: thickness including the raised face = flange thickness + raised-face height.
- Values are nominal dimensions from the standard; a dash (—) means the value is not listed. Verify against the current edition before design, purchase or fabrication.
Other sizes — IS 1538 Tables 4 & 6, flanges of pipes and fittings: dimensions and standard drilling
10012515020025030035040045050060070075080090010001050110012001500
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.