Welcome to our E S HAJI & CO!
Call us 9:00am - 6:00pm
(+91) 994 009 7572 / 89563 56925
Monday to Friday
9:00am - 6:00pm
E-mail us
info@eshaji.in
Custom Flange
Manufacturers
in Chennai
Precision-engineered MS, SS, CS and alloy steel flanges — 15 NB to 3000 NB, Class 150# to 2500#. Built to your drawings. MTC certified. PAN India & export delivery.
Experience
Leading Custom Flange Manufacturers & Suppliers in Chennai
E S HAJI & CO. is a Chennai-based manufacturer specializing in precision-engineered industrial flanges built to international standards. With 30+ years of hands-on experience, we have earned a strong reputation as one of the most reliable flange manufacturers in Chennai — trusted by procurement teams, EPC contractors and project engineers across India.
From standard weld neck and slip-on flanges to fully custom-designed configurations, we manufacture to client drawings and project specs with strict adherence to globally recognised standards. Each flange undergoes precision forging, CNC machining and multi-stage quality testing — backed by third-party inspection from Lloyds, Bureau Veritas and TUV.
Size Range
15 NB (½") to 3000 NB
Pressure Class
150# · 300# · 600# · 900# · 1500# · 2500#
Standards
ASME B16.5 / B16.47 / B16.48 / DIN / BS / JIS / IS
Materials
MS, CS, SS, Alloy Steel, Duplex, Hastelloy, Monel, Inconel
Certification
MTC EN 10204 3.1 / 3.2 provided with every order
Key Benefits of Our Custom Flanges
Every flange we manufacture is built to perform under the most demanding industrial conditions.
Premium-Grade Raw Materials
Sourced from certified mills for guaranteed strength and long service life.
Precision Machined Dimensions
CNC machining ensures accurate bore, bolt circle and tight leak-proof sealing.
Multiple Pressure Classes
From 150# to 2500# — covering every industrial pressure requirement.
Corrosion & Heat Resistant
Engineered to withstand high temperatures, chemicals and corrosive environments.
Built to Your Specifications
Custom-manufactured as per client drawings, project specs and engineering requirements.
Industry-Wide Compatibility
Suitable for oil & gas, petrochemical, power, marine and infrastructure sectors.
Tested Before Every Dispatch
Multi-stage inspection ensures every flange meets dimensional and performance standards.
Bulk Supply, Fast Delivery
High-volume production capacity with reliable PAN India delivery timelines.
Types of Flanges — Grades & Specifications
Weld Neck Flange
Slip-On Flange
Blind Flange
Socket Weld Flange
Threaded Flange
Lap Joint Flange
Long Weld Neck Flange
Orifice Flange
Spectacle Blind Flange
Full Specifications of Our Flanges
| Specification | Details |
|---|---|
| Types | Weld Neck (WNRF), Slip-On (SORF), Blind (BLRF), Socket Weld (SWRF), Threaded (TRF), Lap Joint, Long Weld Neck, Orifice, Reducing, Spectacle Blind, Spacer & Ring |
| Standards | ASME B16.5, ASME B16.47 (Series A & B), ASME B16.36, ASME B16.48, MSS SP-44, AWWA C207, DIN, EN1092-1, BS 10, BS 4504, JIS, IS 6392, IS 3589, Custom Drawing |
| Size Range | 15 NB (½") to 3000 NB — covering standard and oversized diameters |
| Pressure Class (ASME) | 150#, 300#, 400#, 600#, 900#, 1500#, 2500# |
| Pressure Class (DIN) | PN 6, PN 10, PN 16, PN 25, PN 40, PN 64, PN 100 |
| Face Types | Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ), Tongue & Groove (T&G), Male-Female (M&F) |
| Wall Thickness | SCH 10, 20, 30, 40, 80, 120, 160, STD, XS, XXS |
| Manufacturing Process | Forged, CNC Machined, Heat Treated |
| Certifications | ISO, Material Test Certificate (MTC) as per EN 10204 3.1 / 3.2 |
| Third-Party Inspection | Lloyds, Bureau Veritas (BV), Engineers India Ltd (EIL), BHEL, TUV |
Material Grades We Supply
| Material Type | Grades / ASTM Specifications |
|---|---|
| Carbon Steel (CS) | ASTM A105, A105N, A350 LF1, LF2 CL1/CL2, LF3 CL1/CL2, A694 F42, F46, F52, F60, F65, F70, A266 Gr.1/2/3/4 |
| Stainless Steel (SS) | ASTM A182 F304, F304L, F304H, F316, F316L, F316H, F316Ti, F317, F317L, F321, F321H, F347, F347H, F310S, F904L |
| Alloy Steel | ASTM A182 F1, F5, F9, F11, F12, F22, F91 |
| Duplex & Super Duplex | ASTM A182 F44 (254 SMO), F51 (S31803), F53 (S32750), F55 (S32760), F60, F61 |
| Nickel Alloys | Hastelloy C-22, C-276 (ASTM B564), Monel 400 / K500, Inconel 600 / 625 / 718 / 800 / 825 |
| Mild Steel (MS) | IS 2062, IS 2002, ASTM A515 Gr.60/70, A516 Gr.60/70 |
Pressure Class Reference
| Standard | Available Classes |
|---|---|
| ASME/ANSI B16.5 | 150#, 300#, 400#, 600#, 900#, 1500#, 2500# |
| ASME/ANSI B16.47 (Series A & B) | 75#, 150#, 300#, 400#, 600#, 900# |
| DIN / EN1092-1 | PN 6, PN 10, PN 16, PN 25, PN 40, PN 64, PN 100 |
| BS 10 | Table D, E, F, H |
Flange Face Types Available
How We Build Your Flange
Engineering Review
Our team reviews client drawings, specs and application requirements before production begins.
Raw Material Sourcing
Certified mill materials are selected and verified with incoming inspection and PMI testing.
Forging & CNC Machining
Precision forging, heat treatment and CNC machining deliver dimensional accuracy and strength.
QC & Dispatch
NDT, hardness, dimensional inspection and MTC documentation before secure dispatch.
Industries We Serve
Trusted by engineers across refineries, power plants and processing facilities throughout India.
Oil & Gas Refineries
High-pressure flanges built for pipelines, refineries and offshore installations.
Petrochemical Plants
Corrosion-resistant grades for aggressive chemical and hydrocarbon environments.
Power Generation
Heat-rated flanges for steam lines, turbines and critical power plant systems.
Chemical & Fertilizer Plants
Chemical-compatible materials for safe, leak-proof process piping connections.
Water & Wastewater
Durable flanges for pumps, filters and water distribution pipeline networks.
Pharmaceutical & Food
Hygienic-grade SS flanges meeting strict sanitary and compliance standards.
Marine & Shipbuilding
Saltwater-resistant flanges for marine piping and offshore structures.
Sugar, Cement & Paper Mills
Heavy-duty flanges for high-load, continuous-operation industrial plant systems.
Heavy Engineering
Structural-grade flanges for large-scale fabrication and infrastructure projects.
What Our Clients Say
We have been sourcing custom flanges from E S HAJI & CO. for over four years. Their ability to manufacture to exact drawings with full MTC documentation has made them our go-to supplier for critical piping requirements.
Rajesh Kumar Purchase Manager, Bharat PetroleumE S HAJI & CO. delivered a bulk order of ASME B16.47 large-diameter flanges within the committed timeline. Quality was consistently within tolerance and third-party inspection by Bureau Veritas was cleared without any remarks.
Arvind Nair Project Engineer, Larsen & ToubroFinding a manufacturer who can handle both standard and exotic-grade flanges under one roof is rare. E S HAJI & CO. has delivered Duplex and Inconel flanges for our high-temperature applications with zero rejections so far.
Santhosh Pillai Procurement Head, Thermax LimitedLocations We Serve
From our facility in Ambattur, Chennai — we supply to industrial hubs across India and ship internationally.
Chennai & Tamil Nadu
Ambattur · Sriperumbudur · Oragadam · Tambaram
Guindy · Padi · Maraimalai Nagar · Manali · Ennore
Coimbatore · Hosur · Trichy · Madurai
PAN India
Mumbai · Pune · Ahmedabad · Hyderabad · Bangalore
Kolkata · Delhi · Vadodara · Surat · Vizag
Kochi · Jamshedpur · and all major industrial cities
International Export
UAE · Saudi Arabia · Qatar · Oman · Bahrain
Sri Lanka · Nepal · Bangladesh · Singapore
Malaysia · Africa · and more
Frequently Asked Questions
Common questions about our custom flange manufacturing and supply.
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What types of custom flanges does E S HAJI & CO. manufacture?
We manufacture Weld Neck, Slip-On, Blind, Socket Weld, Threaded, Lap Joint, Long Weld Neck, Orifice and Spectacle Blind flanges — available in all materials, sizes and pressure ratings as per project requirements.
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Which materials are available for custom flange manufacturing?
We supply flanges in Carbon Steel (ASTM A105), Stainless Steel (A182 F304/F316), Alloy Steel, Duplex, Hastelloy, Monel and Inconel — selected based on operating temperature, pressure and chemical compatibility.
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What size range do your custom flanges cover?
Our flanges are manufactured from 15 NB (½ inch) up to 3000 NB, covering both standard and oversized dimensions including custom bore and bolt-circle configurations as per client drawings.
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What is the difference between ASME B16.5 and ASME B16.47?
ASME B16.5 covers flanges up to 24 inches in sizes 150# to 2500#. ASME B16.47 covers large-diameter flanges from 26 to 60 inches in Series A and Series B — used in heavy industrial and pipeline applications.
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Which material is best for high-temperature, high-pressure service?
For high-temperature service, Alloy Steel grades like ASTM A182 F11, F22 and F91 are recommended. For corrosive high-pressure environments, Duplex or Super Duplex grades like F51 and F53 are the preferred choice.
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Do you manufacture flanges as per DIN and IS standards?
Yes. In addition to ASME and ANSI, we manufacture flanges to DIN, EN1092-1, BS 10, BS 4504, JIS, IS 6392 and IS 3589 — as well as fully custom drawings provided by the client.
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What quality certifications do your flanges come with?
Every flange is supplied with a Material Test Certificate (MTC) as per EN 10204 3.1/3.2. Third-party inspection by Lloyds, Bureau Veritas, EIL, BHEL and TUV is available on request.
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Do you supply flanges for oil & gas and petrochemical industries?
Yes. Our flanges are widely used in oil & gas refineries, petrochemical plants, power generation, chemical processing and water treatment — engineered to handle extreme pressure, temperature and corrosive media.
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What is the typical delivery timeline for custom flanges?
Standard items are dispatched within 7–15 working days. Custom orders are scheduled based on manufacturing complexity. We serve clients across Chennai, PAN India and export to UAE, Saudi Arabia, Qatar and other countries.
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How can I get a quote for custom flanges?
Contact us via phone at (+91) 994 009 7572 or email at info@eshaji.in. Share your drawings, specifications or project requirements and our engineering team will provide a detailed quote promptly.
Explore Our Products
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Get in touch
You will find yourself working in a true partnership that results in an incredible experience, and an end product that is the best.
Call us on
(+91) 994 009 7572 / 89563 56925
Email us
info@eshaji.in
