Forged Flanges Manufacturer & Supplier in India

What are ANSI B16.5 Forged Flanges?

ANSI B16.5 Forged Flanges are a type of flange that is commonly used in high-pressure piping systems. These flanges are designed to be welded or bolted onto the end of a pipe and are typically made from forged steel. They are available in various sizes, pressure ratings & materials and connect pipes, valves, and other equipment in a piping system.

Advantages of ANSI B16.5 Forged Flanges

Forged steel flanges resist corrosion and erosion in continuous high-pressure and high-temperature lines, holding their shape where cast parts develop micro-cracks under repeated thermal cycling. Bolt holes, gaskets and standard dimensions across ANSI B16.5 forged flanges mean installation crews work with the same tooling on every job. Because NISPL stocks Stainless Steel, Alloy Steel, Carbon Steel, Nickel, Monel, Inconel, Incoloy, Hastelloy, Alloy 20 and Duplex grades, engineers match the flange material to the exact service condition, whether that is a sour gas line or a food-grade water system, instead of compromising on a single standard alloy.

How are ANSI B16.5 Forged Flanges Installed in Piping Systems?

Installation starts with aligning the flange face against the mating pipe or valve flange, fitting a gasket between the two faces, then inserting bolts through the matching bolt circle. Technicians tighten the nuts in a crisscross pattern, not in a single rotation, to spread load evenly across the gasket and avoid a leak path on one side. Torque values change with bolt size, gasket type and pressure class, so installers follow the project's bolt-torque chart rather than tightening by feel. Skipping that step is the most common cause of flange leaks reported on site.

Standard Specification For Forged Flanges

Dimensions : ANSI B16.5, ANSI B16.47 Series A & B, MSS SP44, ASA, API-605, AWWA, Custom Drawings

Size : 1/2" (15 NB) to 48" (1200NB)

Class : 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS, DIN Standard ND-6,10, 16, 25, 40 Etc.

DIN : DIN2527, DIN2566, DIN2573, DIN2576, DIN2641, DIN2642, DIN2655, DIN2656, DIN2627, DIN2628, DIN2629, DIN 2631, DIN2632, DIN2633, DIN2634, DIN2635, DIN2636,DIN2637, DIN2638, DIN2673

BS : BS4504 , BS4504, BS1560, BS10

Flange Face Type : Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ)

Material & Grades of Forged Flanges :

Stainless Steel Forged Flanges :
ASTM A 182, A 240 F 304, 304L, 304H, 316, 316L, 316Ti, 310, 310S, 321, 321H, 317, 347, 347H, 904L

Duplex & Super Duplex Steel Forged Flanges :
ASTM / ASME A/SA 182 F 44, F 45, F51, F 53, F 55, F 60, F 61

Carbon Steel Forged Flanges :
ASTM / ASME A/SA 105 ASTM / ASME A 350 , ASTM A 181 LF 2 / A516 Gr.70 A36, A694 F42, F46, F52, F60, F65, F706

Low Temperature Carbon Steel Forged Flanges : ASTM A350, LF2, LF3

Alloy Steel Forged Flanges :
ASTM / ASME A/SA 182 & A 387 F1, F5, F9, F11, F12, F22, F91

Copper Alloy Steel Forged Flanges : ASTM SB 61 , SB62 , SB151 , SB152 UNS No. C 70600 (Cu-Ni 90/10), C 71500 (Cu-Ni 70/30), UNS No. C 10100, 10200, 10300, 10800, 12000, 12200

Nickel Alloy Forged Flanges :
ASTM SB564, SB160, SB472, SB162 Nickel 200 (UNS No. N02200), Nickel 201 (UNS No. N02201), Monel 400 (UNS No. N04400), Monel 500 (UNS No. N05500), Inconel 800 (UNS No. N08800), Inconel 825 (UNS No. N08825), Inconel 600 (UNS No. N06600), Inconel 625 (UNS No. N06625), Inconel 601 (UNS No. N06601), Hastelloy C 276 (UNS No. N10276), Alloy 20 (UNS No. N08020)

ASME B16.5 Forged Flanges Available Types

ANSI B16.5 Forged Flanges Application

Neo Impex Stainless Private Limited’s forged flanges go into a wide range of industrial systems, supplied through stock-keeping branches that ship across India and overseas:

Export Destinations For Forged Plate Flanges

Why Choose Neo Impex for Forged Flanges?

Neo Impex Stainless Private Limited holds ISO 9001:2000 certification and runs an in-house production capacity of 300 metric tons per annum from its Por facility near Vadodara, Gujarat. That in-house capability means our company controls forging, machining and finishing under one roof instead of outsourcing stages to third parties, cutting the lead time between order confirmation and dispatch. As a forged flanges manufacturer in India, we supply public sector undertakings, government departments and private industry across the country, alongside export orders to Europe, Africa, the Middle East and South East Asia. Buyers requiring third-party inspection get sign-off from agencies so flanges leave the plant with documentation accepted by major project consultants. Quick response to enquiries and direct access to material test certificates determine why repeat buyers place follow-on orders for forging flanges rather than switching suppliers. For more information about forged flanges, please call +91 22 6639 3943/44 or send an Email to [email protected]

FAQs

What are forged flanges?

Forged flanges are pipe-end discs shaped from solid steel billets under mechanical pressure, then machined to standard bolt patterns so pipes, valves and fittings bolt together securely.

What is the difference between cast and forged flanges?

Forging compresses steel into a denser grain structure, giving better impact strength, while casting pours molten metal into a mould, which can trap voids that weaken the flange under pressure.

What are the common standards for forging flanges?

ANSI B16.5, ASME B16.47, MSS SP-44 and EN 1092-1 are the standards manufacturers reference most often, covering dimensions, pressure classes, materials and bolt-hole layouts for forging flanges.

What are ASME B16.5 forged flanges?

ASME B16.5 forged flanges are forged steel flanges built to a standard covering sizes ½ inch to 24 inches NB and pressure classes from 150 to 2500, used across pipelines and process equipment.

Where are forged flanges used?

Forged flanges connect piping in oil and gas, chemical processing, power generation, water supply, paper and pulp, and food processing plants, anywhere pipes need a bolted, leak-proof joint.