Industrial Flanges Overview
Mortec Manufacturing Co At A Glance
Founded
2012 • over a decade forging flanges & fittings
In-House Units
Forging & CNC machining • own units at Taloja & Mazgaon
Stockyard
8,850+ sq.ft • ready flange & fitting stock
Approvals
ISO 9001:2015, IBR • Boiler Directorate, GST & IEC
Clientele
100+ buyers • across EPC, OEM & trading accounts
Export Reach
15+ countries • shipped direct from our Mumbai stockyard
Testing Offered
Chemical, mechanical & hydro • run in our NABL lab
Shipment Documents
COA, COO, COI, MTC • and Bill of Lading per consignment
Table of Content
Produce IBR and Non-IBR Industrial Flanges in Various Material and Grades Under Boiler Directorate Approval
Every flanged joint is only as strong as the mill certificate behind it, and that is where we compete: as a flanges manufacturer in Mumbai running our own forging and CNC machining lines, we build weld neck, slip on, blind, socket weld, threaded and lap joint flanges under IBR and Non-IBR routes, in the material and pressure class your line drawing specifies. Buyers across Mumbai, Ahmedabad, Gujarat, and export markets from Johannesburg to Dubai, order direct from our stockyard rather than through a trading desk.
Pressure classes 150 through 2500 per ASME B16.5, or PN ratings to EN 1092-1 for European-spec projects, are forged and faced in-house, with Boiler Directorate approval available for boiler-mounting duty. Among flange forging companies in India, our grade desk confirms chemistry, facing and bolt-circle before your purchase order is placed, and every batch carries full heat traceability from billet to dispatch.
Flanges Specification
Quote direct for hot forged flanges - unlike most flanges suppliers in India, we hold ex-stock across every pressure class.
Flanges Size Range
- NPS ½″ to 24″ (DN15 to DN600)
- Larger sizes via ASME B16.47 on request
Pressure Class Range
- Class 150, 300, 400, 600, 900, 1500 & 2500 (ASME B16.5)
- PN6 to PN40 (EN 1092-1)
Steel Flanges Governing Standards
- ASME B16.5, ASME B16.47
- EN 1092-1, BS 4504, JIS B2220
- IS 6392 (India)
Facing & Connection Type
- Raised Face (RF), Flat Face (FF), RTJ
- Weld Neck, Slip On, Blind, Socket Weld, Threaded, Lap Joint
Industrial Flanges Material Grades
- Carbon, alloy & stainless steel, duplex & super duplex
- Titanium, Monel & Hastelloy on request
Pipe Flanges Testing & MTC
- NABL ISO/IEC 17025 lab
- EN 10204 2.1, 2.2, 3.1 & 3.2 MTC
Industrial Flanges Available Material and Grades
As a flanges supplier in India, we keep every grade ready for immediate dispatch.
Inconel
Alloy Steel
Carbon Steel
Stainless Steel
Duplex Steel
Super Duplex
Monel
Hastelloy
Titanium
Order Weld Neck and Slip On Flanges Machined Across Class 150 To 2500 Rating, Refer More Available Types
Every profile ships from our flange manufacturer in Mumbai facility, faced and inspected in-house.
Weld Neck Flange
Long Tapered Hub- Butt-welded hub for high-pressure, cyclic and critical service
Slip On Flange
Fillet Welded Both Sides- Slides over pipe, easier site alignment than weld neck
Blind Flange
Solid Disc, No Bore- Seals the end of a pipeline run or vessel opening
Socket Weld Flange
ASME B16.5 Small Bore- Pipe inserted and fillet welded, smooth internal bore
Threaded Flange
No Welding Required- Screwed connection for low-pressure or hazardous-weld areas
Lap Joint Flange
Used With Stub End- Rotates free of the pipe, eases bolt-hole alignment
Orifice Flange
Flow Measurement Taps- Pressure tap holes built in for orifice-plate metering runs
Long Weld Neck Flange
Extended Hub Length- Extra hub length for nozzle and pressure-vessel connections
Spectacle Blind
Figure-8 Isolation- Swings between open ring and blind disc for line isolation
Ring Type Joint (RTJ) Flange
Metal Gasket Groove- Metal-to-metal seal for high-pressure, high-temperature service
Plate Flange
Flat Bored Plate, No Hub- Machined from flat plate for low-pressure, general duty lines
Puddle Flange
Wall Penetration Seal- Cast into a concrete or RCC wall to stop water tracking along the pipe
Flanges Manufacturer in India - Forging & Machining From Our Mumbai Plant Since 2012
Every flange is forged, faced and tested in-house before it reaches your stockyard.
Flanges Drilling, Hole and OD Finish At Mortec
Flange Drilling
Flange Hole
Flange OD Finish
Pipe Flange Marking and Identification Guide
Every batch of flanges in Mumbai carries the same heat number and grade stamp - the six marks below are cross-checked against your PO before dispatch.
Steel Flange Gasket Selection Guide
Matching the gasket to the facing and service condition is what actually stops a leak.
| Facing / Service Condition | Recommended Gasket |
|---|---|
| Raised Face (RF), general service, Class 150–300 | Spiral Wound Gasket |
| Flat Face (FF), cast iron mating flange | Rubber / EPDM Gasket |
| RTJ groove, high pressure / high temperature | Ring Type Joint (RTJ) Gasket |
| Corrosive or chemical process lines | PTFE Gasket |
| Steam and general thermal service | Non-Asbestos Fiber Gasket |
| High temperature, fire-safe applications | Graphite Gasket |
Flange Bolt Torque and Tightening Sequence
The most searched install question we get from site engineers - the pattern matters as much as the torque value.
Hand Tighten
All bolts snugged evenly by hand first.
Cross-Pattern Sequence
Star / criss-cross order, never round the flange.
First Pass - 30%
Partial torque applied in the same cross pattern.
Second Pass - 60%
Repeat the pattern at higher torque.
Final Pass - 100%
Full torque value, then a clockwise check pass.
Flanges Exporter- Serving Durban, South Africa
Container-load or LCL, we handle export packing and paperwork for the whole shipment.
Flanges Dimensions and Pressure Class Range
Size and class together set the bolt circle and drilling - confirm both before ordering to avoid a mismatched flange. The ranges below cover everything we hold in stock or forge to order.
| NPS | DN | Flange OD (mm) | Bolt Circle Dia (mm) | No. of Bolts | Bolt Hole Dia (mm) |
|---|---|---|---|---|---|
| ½″ | 15 | 89 | 60 | 4 | 16 |
| ¾″ | 20 | 98 | 70 | 4 | 16 |
| 1″ | 25 | 108 | 79 | 4 | 16 |
| 1½″ | 40 | 127 | 98 | 4 | 16 |
| 2″ | 50 | 152 | 121 | 4 | 19 |
| 3″ | 80 | 190 | 152 | 4 | 19 |
| 4″ | 100 | 229 | 190 | 8 | 19 |
| 6″ | 150 | 279 | 241 | 8 | 22 |
| 8″ | 200 | 343 | 298 | 8 | 22 |
| 10″ | 250 | 406 | 362 | 12 | 25 |
| 12″ | 300 | 483 | 432 | 12 | 25 |
| 14″ | 350 | 533 | 476 | 12 | 29 |
| 16″ | 400 | 597 | 540 | 16 | 29 |
| 18″ | 450 | 635 | 578 | 16 | 32 |
| 20″ | 500 | 699 | 635 | 20 | 32 |
| 24″ | 600 | 813 | 749 | 20 | 35 |
Chart shown for Class 150. Share your NPS/DN, class or PN, and facing - we confirm outside diameter, bolt circle and bolt count against the current ASME B16.5 or EN 1092-1 table before quoting.
Which Flanges Suit Municipal & Water Utility Lines?
Raw Water Trunk Mains
Treated & Potable Water Lines
Municipal Water Projects
Forged Flange Facing and Surface Finish
Facing finish affects gasket seating and leak-tightness - confirm RF, FF or RTJ before we machine your order. Each option below is machined in-house to your specified rating.
Facing is specified separately from pressure class - always confirm both on your purchase order for an orifice flange, blind flange or any other Non-IBR flanges order.
Get Your Facing Locked Before We Cut Metal
Share the class and connection type - RF, FF or RTJ gets confirmed on the drawing, not guessed at dispatch.
Which Flanges Suit Mining & Mineral Processing Lines?
Slurry & Tailings Pipelines
Mineral Processing Circuits
Mine Dewatering Systems
Non-IBR and Custom Flange Manufacturing Process
Forged and CNC-machined to your drawing - not off a catalogue. As a forged flanges manufacturer India projects rely on, we never start from a plate cut-out.
Drawing Review
Grade desk confirms bore, facing and bolt circle against your drawing.
Hot Forging
Billet upset-forged to the flange blank shape under controlled temperature.
CNC Machining
Bore, face and bolt holes machined to drawing tolerance.
Heat Treatment
Normalized or solution-annealed per the specified grade.
Test & Mark
Hydro, dimensional and hardness check before heat-lot marking.
Which Flanges Suit Desalination & Seawater Plants?
We also supply direct to Flange Manufacturer Dubai and Saudi Arabia desalination-plant inquiries.
Seawater Intake Lines
Brine Discharge Lines
Coastal & Offshore Plants
ASME B16.5 Flanges Supplier In Ahmedabad - IBR Documentation On Request
Domestic dispatch within 48 hours on ex-stock grades and sizes.
IBR Flanges Packing and Export Documentation
Every export order includes customs paperwork - our status as a flanges exporter means direct shipping, without a middleman's delay.
Your Flanges Dealer Across The Middle East & Africa
Ex-stock dispatch across India and beyond - we ship as flange manufacturer and stockholder to buyers on six continents.
Dubai & Abu Dhabi, UAE
Riyadh & Dammam, KSA
Doha, Qatar
Muscat, Oman
Kuwait City, Kuwait
Manama, Bahrain
Turkey
Johannesburg & Durban, South Africa
Nairobi & Mombasa, Kenya
Kampala, Uganda
Lagos, Nigeria
Algeria
Cairo, Egypt
Casablanca & Tangier, Morocco
Addis Ababa, Ethiopia
Dakar, Senegal
Victoria, SeychellesIndustrial Flanges Applications
Among industrial flanges manufacturers in India, we supply every sector below straight from stock, matched to the service condition it needs.
Your Flanges Dealer Across The Americas & Europe
Calgary, Canada
Houston & Chicago, USA
Monterrey, Mexico
Argentina
Brazil
Venezuela
United Kingdom
Germany
Italy
Netherlands
Belgium
SpainPipe Flanges Delivery Timeline
IBR flanges in Mumbai dispatch under Boiler Directorate documentation within the same week.
Ex-Stock Dispatch
Class 150 & 300 stock sizes leave our Mumbai unit within 2–3 working days
Sea Freight
Full container or LCL booking, typically 3–5 weeks depending on destination port
Air Freight
5–7 days turnaround for urgent shutdown or breakdown replacements
Country-Specific ETA
Share your destination port and we confirm a firm sailing date
Sea freight transit time varies by destination port and current vessel schedules.
Forged Flanges NABL Testing & Certification
Buyers ranking us among the best flanges manufacturers in India value this MTC traceability - every test below is run before a batch ships.
Your Flanges Dealer Across Asia Pacific & Central Asia
Singapore
Port Klang, Malaysia
Bangkok, Thailand
Ho Chi Minh City, Vietnam
Indonesia
Philippines
Australia
Azerbaijan
ArmeniaFlanges Frequently Asked Questions
Quick answers to what buyers ask us most before placing an order.
What standards do you manufacture flanges to?
ASME B16.5, ASME B16.47, EN 1092-1, BS 4504, JIS B2220 and IS 6392, across Class 150 to 2500 and PN6 to PN40, with IBR-approved items available on request.
Are your flanges IBR approved?
Yes - IBR approved flanges are supplied for boiler-mounting and pressure-part duty under Boiler Directorate documentation
What is the difference between Class 150 and Class 300 flanges?
Per ASME B16.5, Class 300 carries a materially higher pressure-temperature rating than Class 150 and uses a thicker flange with a different, non-interchangeable bolt circle
Do you supply flanges for desalination and water treatment plants?
Yes - duplex and super duplex flanges for seawater and brine duty, plus carbon and stainless grades for potable and raw water lines
Do you export flanges to Africa, the Middle East and the Americas?
Yes - we ship as manufacturer and stockholder to South Africa, the UAE, Kenya, Canada and 15+ other countries with full export documentation.
Authorized Supplier For The Following Companies - Material At Reseller Price For Traders
