Top-Quality IBR Flanges Manufacturer
We manufacture and export IBR-certified flanges engineered for steam, boiler-connected systems, and high-pressure industrial piping. Every flange is produced to meet Indian Boiler Regulations (IBR 1950) requirements and delivered with full documentation, traceability, and optional third-party inspection. Our scope as an IBR Flanges Manufacturer covers design, material selection, machining, testing, certification, and export packing for customers in power generation, refineries, petrochemicals, shipbuilding, and heavy industry.
Why IBR Compliance Matters
- Legal and operational compliance: IBR applies to pressure equipment and boiler-connected piping in India; non-compliance risks regulatory rejection and operational shutdowns.
- Safety and reliability: IBR-approved components are verified for pressure-temperature performance and material integrity, reducing failure risk in steam and boiler services.
- Procurement certainty: IBR certification and Form III-C documentation simplify government and utility procurement, and meet the expectations of EPC contractors and public-sector clients.
What we can Provide
Product range
- Weld neck, slip-on, socket weld, threaded, blind, lap joint, reducing and long weld neck flanges.
- Facing options: Raised Face (RF), Ring Type Joint (RTJ), Flat Face (FF), and custom face finishes.
- Bore options: full bore, reduced bore, counter-bored as per application.
Size and class coverage
- NPS from ½” up to 48″ (custom ranges on request).
- Pressure classes up to 2500, including 150, 300, 400, 600, 900, 1500, 2500.
Materials
- Carbon steels: A105, A350 LF2 for low-temperature service.
- Stainless steels: SS304, SS304L, SS316, SS316L, Duplex 2205, Super Duplex 2507.
- Alloy steels: ASTM A182 F5, F9, F11, F22, F91.
- Nickel alloys: Inconel 625, 825; Monel; copper-nickel and other specialty alloys on request.
Materials, pressure classes and sizes we supply
We fabricate ASME B16.5 flanges from a wide range of materials to match process conditions:
- Carbon steels: A105, A350 LF2 (low-temperature service)
- Stainless steels: SS304, SS304L, SS316, SS316L, Duplex (2205), Super Duplex (2507)
- Alloy steels: ASTM A182 F11, F22, F5, F9, F91
- Nickel alloys: Inconel 625/825, Monel
- Copper-nickel and specialty alloys (upon request)
Manufacturing process & quality assurance
- Raw material procurement: certified seamless/heavy plate material from qualified mills.
- Cutting & profiling: CNC cutting or oxy-fuel/plasma for larger sizes.
- Forging/rolling: Forged hubs for pressure classes requiring higher strength; rolled plate machining where applicable.
- Heat treatment: Normalizing, quenching & tempering, or annealing as required by material spec.
- CNC machining: Face finish, bore, hub taper, and flange thickness to ASME tolerances.
- Drilling & facing: Bolt-hole pattern, raised face/RTJ groove, and finish to specification.
- NDE & inspection: Visual, PMI, UT/RT/MPI/PT per order.
- Cleaning & coating: Pickling/passivation for stainless, varnish/primer/packing for export.
- Documentation & packaging: MTRs, NDT reports, WPS/PQR, and export-grade packing.
- Product types & facing options
Industrial Standard: IBR Flange
| Flange Type | Description |
| Weld Neck | Long tapered hub; ideal for high-pressure/high-temp systems |
| Slip-On | Slides over pipe; easy to install, good for low-pressure applications |
| Socket Weld | Pipe inserted into socket; used for small-diameter, high-pressure piping |
| Threaded | Screwed onto pipe; useful where welding isn’t feasible |
| Blind | Seals pipe ends; used for pressure testing and isolation |
| Lap Joint | Used with stub ends; allows easy alignment and dismantling |
| Reducing Flange | Connects pipes of different sizes |
| Long Weld Neck | Extended hub; often used in high-pressure vessels |
Testing, certification and export documentation
- Heat-to-part traceability with laser-etched heat/serial numbers.
- MTRs (EN/ASTM), 3.1/3.2 certificates where specified.
- WPS/PQR, NDT reports, inspection logs, and IBR Form III-C documentation for regulatory submission.
Packing, shipping and delivery options
- Individual wooden boxes / crates with anti-corrosion packing.
- VCI (Vapor Corrosion Inhibitor) paper and desiccants for humid routes.
- Marking: Part number, heat number, material, size, pressure class, and manufacturing date on each flange.
- Documentation pack: MTRs, inspection reports, packing list, commercial invoice, certificate of origin (if required), and export customs paperwork.
- Options: FOB, CIF, DDP quotes; container stuffing & lashing; bulk or project-by-project logistics.
Quality assurance & traceability
- IBR 1950 compliance and assistance with IBR Form III-C documentation for registration of pressure equipment.
- ISO 9001 certified quality management system.
- Support for third-party inspection and buyer-specified certification packages.
- Guidance on standard revision and material class selection to ensure alignment with project specifications and local code requirements.
Frequently Asked Questions
- Do IBR flanges differ from ASME B16.5/ANSI flanges? IBR references and accepts common international dimensional standards; ensure you confirm the referenced revision and material class in the project specification.
- What documentation is provided with each shipment? Standard delivery includes MTRs, NDT reports, inspection certificates, packing list and export documentation. IBR Form III-C is issued where applicable.
- Can you accommodate client-specific drawings or proprietary specs? Yes. We manufacture to customer drawings, project specifications, and approved vendor lists following agreed inspection and testing plans.
Request a quote
For firm quotes: provide required NPS, pressure class, material grade, face type, quantity, and destination port/terms