ISMB Beam Sizes and Weights Designation ISMB 500 IS 808 — IS 808
ISMB Beam Sizes and Weights Designation ISMB 500 IS 808 to IS 808: h — depth, mm 500 mm, b — flange width, mm 180 mm, tw — web, mm 10.2 mm, tf — flange, mm 17.2 mm, mass — kg/m 86.9 kg/m.
Dimensions of ISMB Beam Sizes and Weights Designation ISMB 500 IS 808
| Symbol | Dimension | Value |
|---|---|---|
| · | h — Depth, mm | 500 mm (19.685 in) |
| · | b — Flange width, mm | 180 mm (7.087 in) |
| · | tw — Web, mm | 10.2 mm (0.402 in) |
| · | tf — Flange, mm | 17.2 mm (0.677 in) |
| · | Mass — kg/m | 86.9 kg/m (58.39 lb/ft) |
| · | Area — cm² | 111 cm² |
SKU TSH-OTHER-IS-808-IS-808-ISMB500 · Standard IS 808 · teshi-web
Purchase description
ISMB BEAM SIZES AND WEIGHTS, Designation ISMB 500, IS 808, AS PER SPECIFICATION, IS 808
Available materials: As per specification.
Notes
- Values are those of IS 808:1989. Check against IS 808:2021 where the order specifies the current edition.
- Rolled sections are supplied to the rolling tolerances of IS 1852.
Other sizes — ISMB Beam Sizes and Weights, IS 808
Designation ISMB 100Designation ISMB 125Designation ISMB 150Designation ISMB 175Designation ISMB 200Designation ISMB 225Designation ISMB 250Designation ISMB 300Designation ISMB 350Designation ISMB 400Designation ISMB 450Designation ISMB 550Designation ISMB 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.