What sizes of M.S. Flanges are available from I.S. Engineering Co.?

I.S. Engineering Co. manufactures M.S. Flanges in sizes from 15mm NB (half inch) to 600mm NB (24 inch) in all standard types and pressure classes to IS, ANSI B16.5 and BS 4504 standards. Custom sizes outside the standard range are manufactured on request.

What is the price of M.S. Flanges in Mumbai?

M.S. Flange prices depend on type, NB size, pressure rating and quantity. As a direct manufacturer in Darukhana, Mumbai, I.S. Engineering Co. offers factory-direct pricing — the most competitive in Mumbai. Call +91 83558 15350 or email info.isengineering.co@gmail.com for a quotation within 24 hours.

Do you supply M.S. Flanges PAN India?

Yes. I.S. Engineering Co. supplies M.S. Flanges PAN India from our Darukhana, Mumbai factory. We supply to Mumbai, Pune, Delhi, Bangalore, Chennai, Hyderabad, Ahmedabad and all major industrial cities and project sites across India.

Do you manufacture custom size M.S. Flanges?

Yes. I.S. Engineering Co. manufactures custom-size M.S. Flanges as per client drawings or specifications. Share your dimensional requirements — OD, bore, PCD, bolt holes, thickness — and our team provides a manufacturing feasibility and quotation within 24 hours.

What is the difference between E Table Flanges and ANSI Flanges?

E Table Flanges follow Indian Standard IS:1538 Table E dimensions — mandatory for Indian municipal water, sewage and public sector projects. ANSI Flanges follow ANSI B16.5 American Standard dimensions — used in oil and gas, petrochemical and international projects. The two standards are not interchangeable — always match the flange standard to the mating valve or fitting standard.

M.S. Flanges Manufacturer Mumbai – Mild Steel Flanges 15mm to 600mm NB IS ANSI BS Standards

IS / ANSI B16.5 / BS · Primary Product

M.S. Flanges

Name: M.S. Flanges
Brand: I.S. Engineering Co.
Availability: InStock

Mild Steel Flanges Manufacturer & Supplier – Mumbai, India · Since 1999

IS / ANSI B16.5 / BS CertifiedDirect Manufacturer100% Quality InspectedPAN India SupplyGSTIN: 27AMZPK5174G1ZE

M.S. (Mild Steel) Flanges are the backbone of industrial piping systems — used to connect pipes, valves, pumps and equipment in pressure-tight, easily dismantlable bolted joints. I.S. Engineering Co. manufactures premium M.S. Flanges from IS:2062 grade mild steel at our Darukhana, Mumbai factory to IS, ANSI B16.5 and BS 4504 standards. Available in sizes 15mm NB to 600mm NB across all pressure classes (PN6 to PN40 / Class 150 to 2500). 100% dimensionally inspected. Factory-direct pricing. PAN India supply.

Quick Specifications

StandardIS / ANSI B16.5 / BS 4504

Size Range15mm NB – 600mm NB

Pressure RatingPN6 to PN40 / Class 150–2500

Face TypesFF / RF / RJ / RTJ

Material GradeIS:2062 Mild Steel (MS)

Face Finish3.2 Ra – 6.3 Ra (Machined)

Lead Time3–7 Days (Standard) | 7–15 Days (Bulk)

SupplyPAN India | Darukhana, Mumbai

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25+Years Mfg.

600mmMax NB Size

PN40Max Pressure

What Are M.S. Flanges?

M.S. Flanges (Mild Steel Flanges) are flat disc-shaped mechanical components with a central bore matching the pipe bore and bolt holes on the outer rim. When two flanges are bolted together — with a gasket between their mating faces — they create a pressure-tight, leak-proof joint that can be easily assembled and disassembled for maintenance.

M.S. Flanges are manufactured from IS:2062 grade mild steel and are available in several face types: Flat Face (FF) — full-face gasket, used with IS:1538 E Table Flanges for water and sewage; Raised Face (RF) — ring gasket seated on a raised annular surface, most common in oil & gas; Ring Joint (RJ/RTJ) — metal ring gasket for very high pressure service. The flange type, face type, standard and pressure class must all match the mating flange and system requirements.

Types of M.S. Flanges Manufactured by I.S. Engineering Co.

E Table Flanges (IS:1538) — Indian Standard, Flat Face, PN6/PN10/PN16
Blind Flanges — Solid disc, pipe termination, all standards
Welding Neck Flanges — Tapered hub, butt weld, high pressure
Socket Weld Flanges — Socket bore, fillet weld, small bore
Flat / Slip-On Flanges — Slip over pipe, fillet weld, low pressure
Male Female Flanges — Interlocking, precision alignment
Forged Flanges — Forged steel, Class 150–2500, critical service

Why Choose I.S. Engineering Co.?

25+ Years Experience

Manufacturing M.S. Flanges in Mumbai since 1999. Trusted by 500+ clients across India.

Factory-Direct Pricing

No middlemen. Buy direct from the manufacturer at the most competitive prices in Mumbai.

100% Quality Inspected

Every M.S. Flanges undergoes dimensional and material inspection before dispatch from our Mumbai factory.

PAN India Delivery

Supplying to Mumbai, Pune, Delhi, Bangalore, Chennai, Hyderabad, Ahmedabad and all major cities across India.

M.S. Flanges – Dimensional Specifications

Flange Type	Standard	Size Range (NB)	Pressure Class	Face Type	Primary Application
E Table (IS:1538)	IS:1538 Table E	15–600mm	PN6/PN10/PN16	Flat Face (FF)	Water, sewage, fire-fighting
Blind Flanges	IS/ANSI B16.5	15–600mm	All classes	FF/RF/RJ	Pipe termination
Welding Neck	ANSI B16.5	15–600mm	Class 150–2500	RF/RTJ	Oil & gas, high pressure
Socket Weld	ANSI B16.11	15–80mm	Class 3000/6000	RF	Small bore, hydraulic
Flat/Slip-On	IS:6392/ANSI	15–600mm	PN6–PN40	FF/RF	Low pressure, water, HVAC
Male Female	IS/ANSI B16.5	15–300mm	PN6–PN40	M&F	Chemical, process piping
Forged Flanges	ANSI B16.5	15–600mm	Class 150–2500	RF/RTJ	Refineries, power plants

* Dimensions are indicative. Custom sizes available on request. Contact I.S. Engineering Co. at +91 83558 15350 for specific sizes, tolerances and full specification sheets.

M.S. Flanges – Industries & Applications

Oil & Gas Pipelines

Used in oil refinery pipelines, gas distribution systems and petrochemical plants. Welding Neck and Forged Flanges (Class 600–2500) used for high-pressure service.

Municipal Water Supply

E Table Flanges (IS:1538 PN6/PN10) are mandatory for water distribution mains, pumping stations and water treatment plants in Indian municipal projects.

Power Plants

Welding Neck and Forged Flanges used in steam, cooling water and process piping in thermal and nuclear power plants. Class 300–900 for medium-high pressure steam service.

Construction & Infrastructure

Flat/Slip-On and E Table Flanges used in building plumbing, HVAC chilled water, fire-fighting mains and construction site utilities.

Chemical & Process Plants

Male Female and Welding Neck Flanges used in chemical reactors, process vessels and pipelines. Material selection and pressure rating critical for chemical compatibility.

Marine & Shipbuilding

M.S. Flanges used in ship piping systems, port authority utilities and offshore platform auxiliary systems. Class 150–600 flanges in seawater-cooled systems.

M.S. Flanges – Frequently Asked Questions

What are M.S. Flanges?

M.S. (Mild Steel) Flanges are flat disc-shaped pipe fittings manufactured from IS:2062 grade mild steel. They are bolted in pairs — with a gasket between their mating faces — to create a pressure-tight, leak-proof and easily dismantlable connection between pipes, valves, pumps and equipment in industrial piping systems.

What standards are M.S. Flanges manufactured to?

I.S. Engineering Co. manufactures M.S. Flanges to: IS:1538 Table E (E Table Flanges), IS:6392 (Flat Face Flanges), ANSI B16.5 (Welding Neck, Blind, Slip-On flanges), ANSI B16.11 (Socket Weld), BS 4504 (British Standard) and customer-specific drawings. Material conforms to IS:2062.

What is the size range of M.S. Flanges available?

I.S. Engineering Co. manufactures M.S. Flanges in sizes from 15mm NB (½ inch) to 600mm NB (24 inch). Custom sizes outside this range are manufactured on request. All standard NB sizes per IS, ANSI and BS specifications are available.

What face types are available in M.S. Flanges?

M.S. Flanges are available in: Flat Face (FF) — for IS:1538 E Table Flanges and water service; Raised Face (RF) — for ANSI B16.5 flanges in oil & gas; Ring Joint Face (RTJ/RJ) — for very high pressure critical service. The face type must match the mating flange and gasket type.

What is the difference between Flat Face and Raised Face flanges?

Flat Face (FF) flanges have a completely flat mating surface and require a full-face gasket covering the entire flange face. Used with IS:1538 E Table Flanges in water, sewage and low-medium pressure service. Raised Face (RF) flanges have a small raised annular ring around the bore where the gasket seats. Used with ANSI B16.5 flanges in oil & gas and higher-pressure process piping.

How do I select the correct M.S. Flange type?

Select based on: (1) Standard — IS:1538 for Indian projects, ANSI B16.5 for international; (2) Flange Type — Blind for termination, Weld Neck for high pressure, Slip-On for low pressure; (3) Pressure Class — PN6/PN10/PN16 for IS, Class 150–2500 for ANSI; (4) Face Type — FF for IS standard, RF for ANSI; (5) Size — match pipe NB. Call our team at +91 83558 15350 for technical guidance.

What material are M.S. Flanges made from?

Our M.S. Flanges are manufactured from IS:2062 Grade E250 Mild Steel with tensile strength 410–530 N/mm², yield strength ≥ 250 N/mm² and elongation ≥ 23%. All raw material is sourced from reputable Indian steel manufacturers and verified before production.

Do you supply M.S. Flanges in bulk quantities?

Yes. I.S. Engineering Co. specialises in bulk supply of M.S. Flanges for large infrastructure, construction, oil & gas and industrial projects. Bulk orders receive preferential pricing. Our Darukhana, Mumbai factory is fully equipped to handle large-volume production with consistent quality on every piece.

What face types are available for M.S. Flanges?

M.S. Flanges are available in: Flat Face (FF) — used with IS:1538 E Table Flanges for water and sewage service; Raised Face (RF) — used with ANSI B16.5 flanges for oil & gas and process piping; Ring Joint Face (RTJ/RJ) — for very high-pressure critical service. The face type must match the mating flange and gasket type.

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