Leading Supplier, Stockist and Exporter of Flanges
BB Infras is a recognised supplier, stockist and exporter of industrial flanges used in piping systems across oil & gas, petrochemical, power, shipbuilding and water treatment industries. We supply all flange types in a comprehensive range of materials, pressure classes and facing options from our ready stock in Mumbai.
Our flange inventory covers all types manufactured to ASME B16.5, ASME B16.47 Series A & B, API 6A, API 605, MSS SP-44 and DIN/EN standards. Pressure classes range from 150# through 2500# with bore sizes from ½" NB to 60" NB.
Flanges supplied by BB Infras are available in Carbon Steel (ASTM A105, A350 LF2), Stainless Steel (304, 304L, 316, 316L, 321), Alloy Steel (F5, F9, F11, F22), Duplex & Super Duplex (F51, F53), Nickel Alloys (Inconel, Hastelloy, Monel) and Titanium grades.
All flanges are supplied with EN 10204 3.1 Mill Test Certificates. Third-party inspection by SGS, Bureau Veritas, TUV or Lloyd's Register is available. Hydrostatic testing, UT/RT, dimensional reports and NABL lab certificates are provided on request.
Flange Types Supplied
| Flange Type | Standard | Pressure Class |
|---|---|---|
| Weld Neck Flange (WNRF) | ASME B16.5 / B16.47 | 150# – 2500# |
| Slip On Flange (SORF) | ASME B16.5 | 150# – 2500# |
| Blind Flange (BL) | ASME B16.5 / B16.47 | 150# – 2500# |
| Socket Weld Flange (SWRF) | ASME B16.5 | 150# – 2500# |
| Threaded Flange (THRF) | ASME B16.5 | 150# – 2500# |
| Lap Joint Flange (LJ) | ASME B16.5 | 150# – 2500# |
| Orifice Flange | ASME B16.36 | 300# – 2500# |
| Spectacle Blind Flange | ASME B16.48 | 150# – 2500# |
| Long Weld Neck Flange | ASME B16.5 | 150# – 2500# |
| Ring Type Joint Flange (RTJ) | ASME B16.5 / API 6A | 300# – 2500# |
Materials & Grades
| Material | Grade | Standard |
|---|---|---|
| Carbon Steel | ASTM A105, A105N | ASME B16.5 |
| Low-Temperature Carbon Steel | ASTM A350 LF2, LF3 | ASME B16.5 |
| Alloy Steel | ASTM A182 F5, F9, F11, F22, F91 | ASME B16.5 |
| Stainless Steel | ASTM A182 F304/L, F316/L, F321 | ASME B16.5 |
| Duplex / Super Duplex | ASTM A182 F51, F53, F55 | ASME B16.5 |
Frequently Asked Questions
- Q: What flange types does BB Infras supply?
- A: We supply all standard flange types — Weld Neck, Slip On, Blind, Socket Weld, Threaded, Lap Joint, Orifice, Spectacle Blind, Long Weld Neck and Ring Type Joint to ASME B16.5 / B16.47.
- Q: What pressure classes are available?
- A: Flanges are stocked in pressure classes 150#, 300#, 600#, 900#, 1500# and 2500#. Special classes per API 6A or ASME B16.47 are available on order.
- Q: Do flanges come with MTC?
- A: Yes — all flanges are supplied with EN 10204 3.1 Mill Test Certificates. Third-party inspection is available on request.
- Q: What facing options are available?
- A: Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ) and Tongue & Groove (T&G) facings are available. Custom machined facings on request.
