Flanges Supplier — Gujarat, Jharkhand, Chhattisgarh, Assam & Arunachal Pradesh

Looking for a reliable Flanges supplier for your pipeline and process piping projects? We manufacture and supply a complete range of ASME B16.5 and ASME B16.47 pipe flanges — including weld neck, slip-on, blind, socket weld, threaded, lap joint, and reducing flanges — to EPC contractors, refineries, petrochemical plants, and industrial procurement teams across Gujarat, including Ahmedabad, Surat, Vadodara, Rajkot, Kachchh, Amreli, Aravalli, Gandhinagar, Navsari, Godhra, and Palanpur, as well as Jharkhand, Chhattisgarh, Assam, and Arunachal Pradesh.

Our flanges are manufactured in carbon steel, stainless steel, alloy steel, duplex steel, cupro-nickel, Monel, Inconel, and Hastelloy, meeting ASME B16.5, ASME B16.47 Series A and B, MSS SP-44, API 605, DIN, and AWWA standards, with all pressure classes from Class 150 to Class 2500 available across sizes from 1/2 inch to 60 inch.

What Is a Pipe Flange?

A Pipe Flange is a disc-shaped mechanical component used to connect two sections of pipeline, or to connect a pipe to a valve, pump, equipment nozzle, or other inline component, creating a bolted, gasketed joint that can be easily assembled, inspected, and disassembled without cutting the pipe. The two mating flanges are bolted together face-to-face with a gasket between the seating faces, and the bolt load compresses the gasket to create a leak-tight pressure seal.

Flanges are the standard method for connecting pipeline sections wherever the joint needs to be periodically broken for maintenance, inspection, or equipment removal, and wherever welding an inline component directly to the pipe would make future maintenance impractical.

The combination of flange type, face type, material grade, and pressure class is carefully selected to match the specific pipe size, pressure rating, temperature, and process media of each piping system. Getting this selection right is critical for safe and leak-free operation throughout the plant’s service life.

Flanges are essential in:

• Cross-country oil and gas transmission pipeline tie-in connections
• Refinery and petrochemical process piping
• Power plant steam, feedwater, and condensate systems
• Municipal and industrial water treatment plant pipelines
• Chemical plant and pharmaceutical process piping
• Structural connections in pressure vessel nozzles

Types of Flanges We Supply

We manufacture and supply the complete range of standard flange types to ASME B16.5, ASME B16.47, DIN, and AWWA standards.

Weld Neck Flange (WNRF) — The most widely specified flange type for high-pressure and high-temperature service. Features a long tapered neck that is butt-welded to the pipe end, providing excellent stress distribution through the taper from the flange body into the pipe wall. The bore is matched to the pipe’s internal diameter to eliminate turbulence at the joint. Radiographically testable at the weld. Used in refineries, power plants, and critical process piping where long service life and weld integrity are paramount.

Slip-On Flange (SORF) — The pipe slips inside the flange bore and is fillet-welded both inside and outside the flange hub. Lower cost than weld neck flanges and easier to align during installation, making slip-on flanges widely used for lower-pressure general service applications. Not recommended for high-pressure, high-temperature, or cyclic service.

Blind Flange — A solid disc with no centre bore, used to close the open end of a pipeline, vessel nozzle, or valved branch. Must withstand the full pipeline pressure as a pressure-bearing component.

Socket Weld Flange — The pipe is inserted into a socket in the flange body and fillet-welded externally. Used for small-bore high-pressure pipelines, typically up to 3 inch (DN80) in Class 3000 and Class 6000 service.

Threaded Flange (Screwed Flange) — Has a threaded bore to connect directly to a threaded pipe end without welding, suitable for lower-pressure utility and instrument connections up to Class 600.

Lap Joint Flange — Used with a stub end fitting, allowing the flange to rotate freely around the pipe for easy bolt hole alignment. The stub end makes the seal against the mating flange face, while the lap joint flange provides only the bolt clamping load. Used where frequent disassembly is required or where the flange can be a lower-cost material than the stub end.

Reducing Flange — Connects pipelines of two different sizes without a separate reducer fitting, with different bore and outside face dimensions.

Long Weld Neck Flange — An extended weld neck design used on equipment nozzles, pressure vessels, and heat exchangers where additional reinforcement of the nozzle connection is required.

Flange Face Types

The face type determines how the gasket is seated and how the flange mates with its opposite number.

Raised Face (RF) — The most common face type for Class 150 to Class 2500 flanges. The seating area is raised above the bolting face by 1.6mm (Class 150 and 300) or 6.4mm (Class 400 and above), concentrating bolt load on the gasket area. Compatible with spiral wound gaskets, RTJ gaskets (in adapted designs), and flat ring gaskets.

Flat Face (FF) — The entire face is flush with the bolting surface, used when connecting to cast iron or non-metallic equipment where the raised face could crack the mating flange. Compatible with full-face gaskets.

Ring Type Joint (RTJ) — A machined groove is cut into the flange face to receive a solid metal ring gasket (RTJ gasket), providing a metal-to-metal seal for the highest-pressure applications in Class 600 to Class 2500 and API 6BX flanges. The groove dimensions correspond to the R, RX, or BX ring number.

Flange Material Options

Carbon Steel — ASTM A105 (Forged), A350 LF2 (Low Temperature), ASTM A516 Gr. 70 (Plate) — The most widely used flange material for general oil, gas, water, and process piping service.

Stainless Steel — ASTM A182 F304, F304L, F316, F316L, F321, F347 — For corrosion-resistant flanged joints in chemical, pharmaceutical, and food processing applications.

Alloy Steel — ASTM A182 F11, F22, F5, F9, F91 — For elevated temperature service in power plant steam systems and high-temperature refinery process piping.

Duplex and Super Duplex — ASTM A182 F51, F53, F55, F60, F61 — For offshore, subsea, and aggressive chemical service where high strength and corrosion resistance are required.

Cupro-Nickel — ASTM B151 / B564 — For marine, desalination, and seawater piping systems.

Monel, Inconel, Hastelloy, and Alloy 20 — For extreme corrosion resistance in the most aggressive process environments.

Key Features of Our Flanges

ASME B16.5 and B16.47 compliant — Manufactured to the dimensional standards covering NPS 1/2 to NPS 24 (B16.5) and NPS 26 to NPS 60 (B16.47 Series A and B), ensuring dimensional interchangeability with all standard piping components.

All pressure classes available — Class 150, 300, 400, 600, 900, 1500, and 2500 in ASME; PN6, PN10, PN16, PN25, PN40, PN64, PN100, PN160, PN250, and PN320 in DIN standards.

Forged and plate construction — Forged flanges offer superior mechanical properties for Class 600 and above. Plate flanges (cut from rolled plate) are economical for larger bore Class 150 and Class 300 applications.

All face types available — Raised face (RF), flat face (FF), and ring type joint (RTJ) face types machined to ASME B16.5 surface finish requirements.

Full material traceability — EN 10204 3.1 material test certificates, PMI testing, and hardness testing available on request.

Third-party inspection — Bureau Veritas, Lloyd’s Register, DNV, TÜV, TOFD, and other TPIA inspections arranged on request.

Technical Specifications — Flanges

Custom standards including API 6A, API 6B, API 6BX, MSS SP-44, and non-standard bore flanges are manufactured on request.

Flanges Supplier in Gujarat

Gujarat’s strong pipeline construction, refinery, and process equipment manufacturing base makes it one of India’s most active markets for pipe flanges, with a well-established flanges manufacturing presence in Gujarat’s industrial belt.

Ahmedabad is our primary supply hub. We supply flanges to EPC contractors, piping fabricators, and refinery procurement teams across Ahmedabad’s GIDC industrial estates, including Naroda, Odhav, Vatva, and Kathwada. Ahmedabad buyers regularly order carbon steel A105 weld neck and slip-on flanges in Class 150 and Class 300 for process piping, alongside stainless steel F316L flanges for chemical plant applications.

In Surat, demand comes from the city’s chemical, textile, and petrochemical process industries, where flanges in stainless steel and duplex grades are sourced for corrosive media piping across the Sachin and Pandesara GIDC industrial zones.

**Vadodara (Baroda)**, home to major refineries and petrochemical complexes including IOCL Koyali, generates strong, consistent demand for weld neck flanges in Class 600 and above, in carbon steel and alloy steel F11 and F22 for high-pressure, high-temperature refinery and steam piping systems.

Rajkot is an active market for flanges used in valve and piping assembly, with buyers across the Aji GIDC, Shapar-Veraval, and Metoda industrial zones sourcing carbon steel and stainless steel flanges for OEM piping fabrication and EPC project procurement.

We also actively supply to Kachchh (Bhuj, Gandhidham — a major port and cross-country pipeline corridor), Amreli, Aravalli, Gandhinagar, Navsari, Godhra (Panchmahal), and Palanpur (Banaskantha), covering Gujarat’s major industrial hubs and tier-2 pipeline project zones.

Flanges Supplier in Jharkhand

Jharkhand’s strong industrial and mining base — including major steel plants at Jamshedpur and Bokaro — creates consistent demand for flanges used in process piping, steam systems, and water infrastructure.

We supply Flanges in Ranchi, the state capital, for process plant and infrastructure piping projects. In Jamshedpur, home to one of India’s largest steel plants, our carbon steel weld neck and slip-on flanges are used extensively in the plant’s steam, water, and process piping systems.

In Dhanbad, a major coal industry hub, our flanges support piping requirements in mining and industrial infrastructure. We also serve Bokaro, home to a major steel plant, and Hazaribagh for process piping and structural pipeline flange requirements across the state.

Flanges Supplier in Chhattisgarh

Chhattisgarh’s strong steel, power generation, and mining industries create steady demand for flanges used in industrial process piping and power plant steam systems.

We supply Flanges in Raipur, the state capital, to EPC contractors and industrial procurement teams for process plant and infrastructure piping. In Bhilai, home to a major steel plant, our flanges are used in steam, water, and process piping applications across the plant’s extensive pipeline network.

We also serve Korba, a major power generation hub where thermal power plants create consistent demand for high-pressure alloy steel and carbon steel flanges in steam system piping, and Bilaspur for industrial pipeline projects across the state.

Flanges Supplier in Assam

Assam’s established oil and gas sector, including major refineries and ONGC and OIL operations, makes it one of Northeast India’s most active markets for pipe flanges used in oil field, refinery, and process piping applications.

We supply Flanges in Guwahati, Assam’s largest commercial and industrial centre, to pipeline contractors and industrial procurement teams. In Dibrugarh, a key hub for Assam’s oil and gas exploration and refining activity, our weld neck and blind flanges in carbon steel and alloy steel are used in refinery and pipeline tie-in applications.

We also serve Sivasagar and Tinsukia for oil field pipeline and process piping flange requirements across upper Assam, as well as Jorhat and Nagaon for infrastructure and process plant applications.

Flanges Supplier in Arunachal Pradesh

Arunachal Pradesh’s growing hydropower infrastructure, expanding road and bridge construction, and emerging industrial base create developing demand for pipe flanges in water conveyance, process piping, and infrastructure applications.

We supply Flanges in Itanagar, the state capital, for water supply and infrastructure pipeline projects. Our flanges are also supplied to buyers in Naharlagun, Pasighat, and Tawang for hydropower pipeline and water infrastructure requirements across the state.

Weld Neck vs Slip-On Flange — Which Should You Choose?

Choose Weld Neck Flange for high-pressure (Class 600 and above), high-temperature, and critical service piping where the butt weld joint, superior stress distribution through the tapered hub, and radiographic testability of the weld are required. Weld neck flanges are the standard for oil and gas, power plant, and refinery piping.

Choose Slip-On Flange for lower-pressure general service (Class 150 and 300) where installation simplicity and lower cost are priorities, and where the double fillet weld is acceptable for the service conditions. Slip-on flanges are widely used for water, utility, and general process service piping where high-integrity weld testing is not required.

Why Choose Us for Flanges?

We are a trusted manufacturer and supplier of ASME B16.5 and ASME B16.47 pipe flanges, serving customers across Gujarat and major Indian states with a strong reputation for dimensional accuracy, material compliance, and fast turnaround.

Pan-India dispatch — We serve Gujarat’s major cities and districts alongside Jharkhand, Chhattisgarh, Assam, and Arunachal Pradesh, with in-stock standard sizes dispatched within 24 to 48 hours.

All flange types available — Weld neck, slip-on, blind, socket weld, threaded, lap joint, reducing, and long weld neck flanges under one roof.

Complete material range — Carbon steel A105, stainless steel F304/F316, alloy steel F11/F22, duplex F51/F53, and exotic alloys to match every service condition.

All pressure classes — Class 150 through Class 2500 in ASME; PN6 through PN320 in DIN; API 6A and 6B flanges on request.

All face types — Raised face, flat face, and ring type joint (RTJ) face types with machined surface finishes to ASME B16.5 requirements.

Full material traceability — EN 10204 3.1 material test certificates and third-party inspection available on request.

Frequently Asked Questions — Flanges

What is the difference between a weld neck and slip-on flange?
A weld neck flange has a long tapered neck that is butt-welded to the pipe end, providing superior stress distribution and a radiographically testable joint, suited for high-pressure and high-temperature service. A slip-on flange slips over the pipe and is fillet-welded on both sides, offering lower cost and easier installation for lower-pressure general service applications.

What does ASME B16.5 mean for flanges?
ASME B16.5 is the American Society of Mechanical Engineers standard that specifies the dimensions, materials, pressure-temperature ratings, tolerances, and testing requirements for pipe flanges and flanged fittings in sizes NPS 1/2 to NPS 24, across pressure classes from Class 150 to Class 2500.

What is a raised face (RF) flange?
A raised face (RF) flange has a seating area that is raised above the bolting face by 1.6mm (Class 150/300) or 6.4mm (Class 400 and above), concentrating the bolt load on the gasket area between the two mating flanges to create the pressure seal.

Do you supply flanges in Gujarat?
Yes. We supply across Ahmedabad, Surat, Vadodara, Rajkot, Kachchh, Amreli, Aravalli, Gandhinagar, Navsari, Godhra, and Palanpur, with fast dispatch from our Gujarat facility.

Can I get flanges delivered to Jharkhand, Chhattisgarh, Assam, or Arunachal Pradesh?
Yes. We regularly supply to Ranchi, Jamshedpur, Dhanbad in Jharkhand; Raipur, Bhilai, Korba in Chhattisgarh; Guwahati, Dibrugarh in Assam; and Itanagar, Pasighat in Arunachal Pradesh.

What is the difference between ASME B16.5 and ASME B16.47 flanges?
ASME B16.5 covers pipe flanges in sizes NPS 1/2 to NPS 24. ASME B16.47 covers large-diameter flanges from NPS 26 to NPS 60, in two series: Series A (equivalent to MSS SP-44) and Series B (equivalent to API 605).

Are material test certificates available with flanges?
Yes. We supply flanges with full material traceability and EN 10204 3.1 material test certificates on request for critical project and inspection requirements.

Get a Quote — Flanges

We supply Flanges — weld neck, slip-on, blind, socket weld, threaded, lap joint, reducing, and long weld neck types, in carbon steel, stainless steel, alloy steel, duplex, and exotic alloy grades, from Class 150 to Class 2500 and NPS 1/2 to NPS 60 — to buyers across Gujarat (Ahmedabad, Surat, Vadodara, Rajkot, Kachchh, Amreli, Aravalli, Gandhinagar, Navsari, Godhra, Palanpur) and across Jharkhand, Chhattisgarh, Assam, and Arunachal Pradesh.

Contact us today for the best price, technical guidance, and fastest dispatch for your pipeline and process piping project.