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Pipes and Tubes

Flanges

Bom India Forge and Fittings is a leading stockist and supplier of premium quality Industrial Flanges. Engineered to securely connect pipes, valves, pumps, and other equipment, our flanges provide reliable, leak-proof joints that allow for easy cleaning, inspection, and system modification. We maintain a comprehensive inventory of forged and plate flanges across various pressure classes, dimensions, and face types to meet the rigorous demands of the oil & gas, petrochemical, power generation, and marine industries.

Technical Specifications

Specification Details
Flange Types Weld Neck (WNRF), Slip-On (SORF), Blind (BLRF), Socket Weld (SWRF), Threaded, Lap Joint, Spectacle Blind, Orifice Flanges
Size Range 1/2" (15 NB) to 48" (1200 NB) — Larger sizes available upon request
Pressure Classes (ANSI / ASME) Class 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS
Pressure Classes (DIN / EN) PN6, PN10, PN16, PN25, PN40, PN64, PN100, PN160
Flange Face Types Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ), Tongue & Groove (T&G), Male & Female (M&F)
Manufacturing Standards ASME / ANSI B16.5, B16.47 (Series A & B), B16.48, AWWA C207, DIN, EN 1092-1, BS 4504
Production Methods Forged, Cast, and Plate Machined
Bore Schedule (For Weld Neck) SCH 5, SCH 10, SCH 40, SCH 80, SCH 160, XXS (Machined to match corresponding pipe thickness)

Available Materials & Grades

We supply Flanges across a wide spectrum of premium forged alloys to ensure perfect compatibility and pressure integrity within your piping systems.

Material Grades Standard (ASTM / ASME)
Stainless Steel F304/304L, F316/316L, F310, F317L, F321, F347, F904L A182 / SA182
Duplex & Super Duplex UNS S31803 (F51), S32205 (F60), S32750 (F53), S32760 (F55) A182 / SA182
Titanium Grade 2, Grade 5, Grade 7 B381 / SB381
Inconel / Incoloy 600, 601, 625, 718, 800, 800H, 825 B564 / SB564
Monel Monel 400, Monel K500 B564 / SB564
Hastelloy C276, C22, B2, B3 B564 / SB564
Copper & Brass Electrolytic Copper, Commercial Brass, Aluminum Brass B152, B283

Types of Flanges

Weld Neck Flange (WNRF)
Weld Neck Flanges (WNRF)

Recognized by their long tapered hub, these flanges are butt-welded directly to the pipe. The hub transfers stress from the flange to the pipe, making them the standard choice for high-pressure, severe-condition applications.

  • Excellent stress distribution
  • Ideal for extreme temperatures
  • Minimal flow turbulence
Slip-On Flange (SORF)
Slip-On Flanges (SORF)

These flanges slip over the outside of the pipe and are welded both inside and outside to provide strength and prevent leakage. They are cost-effective and easier to align than weld neck flanges.

  • Cost-effective installation
  • Easier alignment during fabrication
  • Suitable for lower pressure systems
Blind Flange (BLRF)
Blind Flanges (BLRF)

Manufactured without a center bore, blind flanges are used to blank off the ends of piping systems, valves, and pressure vessel openings. They endure high stress from internal pressure.

  • Seals piping systems safely
  • Allows access for future expansion
  • Withstands high internal pressure
Socket Weld Flange (SWRF)
Socket Weld Flanges (SWRF)

Designed primarily for smaller-diameter, high-pressure piping. The pipe is inserted into the socket of the flange and secured with a single fillet weld on the outside, ensuring a smooth internal bore.

  • Designed for small bore piping (up to 4")
  • Reduces risk of weld spatter inside
  • High fatigue strength
Lap Joint Flange
Lap Joint Flanges

Used in conjunction with a "Stub End" fitting. The flange itself is not welded to the pipe, allowing it to rotate freely for easy alignment of bolt holes. Highly economical for systems utilizing expensive alloy pipes.

  • Free-rotating for easy bolt alignment
  • Highly cost-effective for exotic alloys
  • Ideal for systems requiring frequent dismantling

Why Choose Our Flanges?

Easy System Maintenance

Unlike permanent welds, flanged joints allow for quick dismantling, making inspection, modification, and cleaning of piping systems highly efficient.

High-Pressure Sealing

Precision-machined facings (such as Raised Face and Ring Type Joint) ensure an impeccable, leak-proof seal even in high-vibration environments.

Perfect Alignment

Strict adherence to ASME B16.5 and EN 1092 standards guarantees exact bolt-hole alignment for seamless mating with valves and pumps.

100% Traceability

Fully backed by Mill Test Certificates (MTC) with Heat Numbers, Size, and Class stamped directly on the flange edge for transparency.

Industrial Applications

High-class Weld Neck and Blind flanges (in Duplex, Super Duplex, and Alloy Steel) are essential for capping lines, connecting heavy-duty valves, and routing volatile fluids in offshore rigs and refineries.

Forged alloy flanges ensure safe, leak-proof connections in high-temperature steam lines, cooling towers, and critical boiler systems where thermal expansion and contraction are constant factors.

Cupro-Nickel, Titanium, and Monel flanges offer absolute resistance to seawater pitting and crevice corrosion, making them the standard choice for shipbuilding, offshore platforms, and desalination plants.
Ready to Discuss Your Project Requirements?

Contact Bom India Forge and Fittings for competitive pricing, technical data sheets, and immediate stock availability.