SS 304 Flanges Manufacturer in Mumbai

Stainless Steel 304 (UNS S30400) | DIN 1.4301 | ASTM A182 F304 / ASME B16.5 | ISO 9001:2015 Certified — Trusted SS 304 Flanges Manufacturer in Mumbai Supplying Across Maharashtra, Pan-India & 50+ Countries Worldwide

By: Sankalp Alloys Technical Team  |  Published: June 2026  |  Last Updated: June 2026

SS 304 Flanges Manufacturer in Mumbai — Stainless Steel 304 Weld Neck, Slip-On, Blind Flanges by Sankalp Alloys

⚡ Product At a Glance — SS 304 Flanges from Mumbai

Grade / UNS: SS 304 (UNS S30400) | SS 304L (UNS S30403)
DIN / W.Nr.: 1.4301 (SS 304) | 1.4307 (SS 304L)
Standards: ASTM A182 F304 | ASME B16.5 / B16.47
Forms: Weld Neck, Slip-On, Blind, Socket Weld, Threaded, Lap Joint, Plate
Size Range: 1/2" (NB 15) to 48" (NB 1200)
Certification: ISO 9001:2015 | EN 10204 3.1 MTC
Class / Rating: 150# to 2500# | PN6 to PN40
Location: Manufactured & Supplied from Mumbai, Maharashtra

Table of Contents

Introduction — SS 304 Flanges Manufacturer in Mumbai

Mumbai is the commercial and industrial heart of Maharashtra and one of India's largest hubs for stainless steel piping component manufacturing — and Stainless Steel 304 (SS 304) flanges are among the most in-demand products from this region. Their outstanding combination of corrosion resistance, mechanical strength, ease of fabrication, and cost-effectiveness has made SS 304 the most widely specified austenitic stainless steel flange grade across industries throughout Mumbai, Maharashtra, and beyond. From food processing plants in Bhiwandi to pharmaceutical units in Thane, chemical plants in Taloja to water treatment facilities across the Mumbai Metropolitan Region — SS 304 flanges are the go-to solution wherever reliable, corrosion-resistant piping connections are needed.

As a trusted SS 304 Flanges Manufacturer in Mumbai, Sankalp Alloys manufactures and supplies a complete range of Stainless Steel 304 (UNS S30400 / DIN 1.4301) and SS 304L (UNS S30403 / DIN 1.4307) flanges to clients across Mumbai, Maharashtra, pan-India, and 50+ countries. Every product is backed by full material traceability, internationally recognised certifications including EN 10204 3.1 MTC, ISO 9001:2015, ASTM A182 F304, and ASME B16.5 compliance — dispatched reliably from our Mumbai base to destinations across India and worldwide via Nhava Sheva (JNPT).

Whether you are a procurement manager sourcing for a food processing project in Bhiwandi, an EPC contractor purchasing for a chemical plant in Taloja, a trading company supplying industrial clients across Maharashtra, or a maintenance engineer seeking reliable flanges anywhere in India — Sankalp Alloys is your trusted single-source partner for all types and sizes of SS 304 flanges, manufactured and supplied from Mumbai.

🔥 Need SS 304 flanges manufactured in Mumbai? We quote within 24 hours with competitive pricing.

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What are SS 304 Flanges?

SS 304 flanges are precision-engineered piping components manufactured from Grade 304 Stainless Steel — an austenitic, chromium-nickel stainless steel alloy (18% Cr, 8% Ni) standardised as UNS S30400 in the USA, DIN 1.4301 in Germany/Europe, and used to connect pipes, valves, pumps, and other equipment to form a piping system. SS 304 is the most widely used stainless steel grade in the world — often called "18/8 stainless steel" — accounting for over 50% of total global stainless steel production, and it is the default choice for general-purpose stainless flanges manufactured in Mumbai.

Key characteristics that make SS 304 flanges the most popular choice across industries in Mumbai and Maharashtra:

These properties make SS 304 flanges the first choice for procurement engineers and project managers across the food processing, chemical, pharmaceutical, dairy, water treatment, construction, marine (non-submerged), and general industrial sectors operating in and around Mumbai — and Sankalp Alloys manufactures them for all these industries from our Mumbai facility.

Types of SS 304 Flanges Manufactured in Mumbai by Sankalp Alloys

Sankalp Alloys manufactures and supplies the complete range of SS 304 flanges from Mumbai to meet every industrial, commercial, and project requirement. All types are available in standard and custom sizes with full EN 10204 3.1 MTC documentation:

Flange TypeStandard / SpecificationSize RangeGrade
SS 304 Weld Neck FlangesASME B16.5 / ASME B16.47 / ASTM A182 F3041/2"–48"SS 304 / SS 304L
SS 304 Slip-On FlangesASME B16.5 / ASTM A182 F3041/2"–24"SS 304 / SS 304L
SS 304 Blind FlangesASME B16.5 / ASME B16.47 / ASTM A182 F3041/2"–48"SS 304 / SS 304L
SS 304 Socket Weld FlangesASME B16.5 / ASTM A182 F3041/2"–4"SS 304 / SS 304L
SS 304 Threaded FlangesASME B16.5 / ASTM A182 F3041/2"–4"SS 304 / SS 304L
SS 304 Lap Joint FlangesASME B16.5 / ASTM A182 F3041/2"–24"SS 304 / SS 304L
SS 304 Plate / Flat FlangesDIN 2576 / DIN 2633 / EN 1092-115 NB–600 NBSS 304 / SS 304L
SS 304 Orifice FlangesASME B16.36 / ASTM A182 F3041/2"–24"SS 304 / SS 304L
SS 304 Spectacle Blind FlangesASME B16.48 / Custom1/2"–24"SS 304 / SS 304L
SS 304 Ring Type Joint (RTJ) FlangesASME B16.5 / API 6A1/2"–24"SS 304 / SS 304L
SS 304 Reducing FlangesASME B16.5 / Custom1"–24"SS 304 / SS 304L
SS 304 Long Weld Neck FlangesMSS-SP-44 / ASTM A182 F3041/2"–24"SS 304 / SS 304L
SS 304 Square / Rectangular FlangesCustom / Drawing-basedAs per drawingSS 304 / SS 304L
SS 304 DIN / EN FlangesDIN 2502 / DIN 2527 / EN 1092-1DN15–DN600SS 304 / SS 304L

* Pressure classes available: 150#, 300#, 400#, 600#, 900#, 1500#, 2500# (ASME) and PN6, PN10, PN16, PN25, PN40 (DIN/EN). Facings: Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ). Custom bore sizes, drilling patterns, and non-standard dimensions available on request for project drawings sourced or supplied from Mumbai.

Chemical Composition & Mechanical Properties — SS 304 & SS 304L Flanges

⚙ SS 304 (UNS S30400 / DIN 1.4301) — ASTM A182 F304

Chemical Composition (% by weight)
  • Chromium (Cr): 18.0 – 20.0%
  • Nickel (Ni): 8.0 – 10.5%
  • Carbon (C): 0.08% max
  • Manganese (Mn): 2.0% max
  • Silicon (Si): 0.75% max
  • Phosphorus (P): 0.045% max
  • Sulfur (S): 0.030% max
  • Nitrogen (N): 0.10% max
  • Iron (Fe): Balance
Mechanical Properties (Annealed Condition)
  • Tensile Strength: 515 MPa (75 ksi) min
  • 0.2% Yield Strength: 205 MPa (30 ksi) min
  • Elongation (2"): 30% min
  • Hardness: 92 HRB max / 201 HB max
  • Density: 8.00 g/cm³
  • Melting Range: 1400 – 1450°C
  • Max Service Temp: 870°C (continuous)
  • Modulus of Elasticity: 193 GPa

⚙ SS 304L (UNS S30403 / DIN 1.4307) — Low Carbon Grade

Chemical Composition (% by weight)
  • Chromium (Cr): 18.0 – 20.0%
  • Nickel (Ni): 8.0 – 12.0%
  • Carbon (C): 0.030% max (extra low carbon)
  • Manganese (Mn): 2.0% max
  • Silicon (Si): 0.75% max
  • Phosphorus (P): 0.045% max
  • Sulfur (S): 0.030% max
  • Nitrogen (N): 0.10% max
  • Iron (Fe): Balance
Mechanical Properties (Annealed Condition)
  • Tensile Strength: 485 MPa (70 ksi) min
  • 0.2% Yield Strength: 170 MPa (25 ksi) min
  • Elongation (2"): 30% min
  • Hardness: 92 HRB max / 201 HB max
  • Density: 8.00 g/cm³
  • Melting Range: 1400 – 1450°C
  • Advantage: Superior weld sensitisation resistance
  • Modulus of Elasticity: 193 GPa

SS 304 Equivalent Grades & International Designations

Sankalp Alloys manufactures SS 304 flanges in Mumbai referenced under any of the following internationally recognised grade designations. All are interchangeable per the applicable standard:

Standard BodySS 304SS 304L
UNS (USA)S30400S30403
DIN / W.Nr. (Germany / Europe)1.43011.4307
EN (Europe)X5CrNi18-10X2CrNi18-9
ISOX5CrNi18-10X2CrNi18-9
ASTM (Forged Flanges)A182 Grade F304A182 Grade F304L
ASTM (Plate)A240 Grade 304A240 Grade 304L
JIS (Japan)SUS 304SUS 304L
BS (UK)304 S 31304 S 11
SAE (USA)3030430304L
Common Name18/8 Stainless Steel18/8L Stainless Steel

Applications of SS 304 Flanges Across Industries

SS 304 flanges from Sankalp Alloys serve a wide range of industries based in and around Mumbai and across India. Below are the primary sectors and specific applications where our SS 304 flanges are specified and used — manufactured and supplied from Mumbai:

🍔

Food Processing & Dairy

Pipeline connection flanges for processing vessels, conveyor systems, homogenisers, pasteurisers, and hygienic equipment piping at food, dairy, and beverage plants across the Mumbai Metropolitan Region. FDA and EU food contact compliant — SS 304 is the standard grade for food-grade piping flanges.

💊

Pharmaceutical & Biotech

Reactor vessel piping flanges, clean room piping connections, autoclave flanges, mixing vessel pipe fittings, and pharmaceutical-grade pipeline flanging for the pharma manufacturing clusters around Mumbai and Maharashtra.

🧪

Chemical Processing

Storage tank pipeline flanges, pump and valve body connections, heat exchanger flanges, scrubber pipework, and pipeline flange joints for mild-to-moderate chemical service in Taloja, Tarapur, and Mumbai-region chemical plants.

🏗️

Construction & Infrastructure

HVAC ducting flanges, fire-fighting pipeline flanges, plumbing system connections, and structural piping flanges used across Mumbai's residential, commercial, and infrastructure construction projects.

💧

Water Treatment & Storage

Water tank pipeline flanges, distribution piping for potable water systems, pump assembly flange connections, filter housing flanges, and water treatment plant piping for municipal and industrial water systems across Mumbai and Maharashtra.

Power Generation

Boiler piping flanges, condenser flange connections, heat exchanger pipe flanges, and general piping flanges for thermal and captive power generation units operating in the Mumbai-Maharashtra industrial corridor.

🚢

Marine & Port Infrastructure

Above-waterline marine piping flanges, deck pipework, and port infrastructure piping flanges — relevant for Mumbai's significant marine and port industry, including Nhava Sheva (JNPT) and Mumbai Port-related fabrication work.

🏭

General Industrial & Engineering

Pipeline flanges for general fabrication, OEM equipment, machine building, and engineering workshops located in Mumbai's MIDC industrial estates, serving both domestic and export-oriented manufacturing units.

Additional applications include: breweries, sugar mills, HVAC and refrigeration piping, solar energy plant piping, textile dyeing units, pulp & paper plant piping, and laboratory and instrumentation piping — all sectors where SS 304 flanges are specified by procurement engineers and project managers across Mumbai and supplied by Sankalp Alloys.

SS 304 vs SS 316 vs SS 316L — Grade Comparison for Buyers

Choosing between SS 304, SS 316, and SS 316L is one of the most common decisions in stainless steel flange procurement. Here is a clear comparison to help engineers and buyers select the right grade for their application:

Property / FactorSS 304 (S30400)SS 316 (S31600)SS 316L (S31603)
Cr / Ni Content18% Cr / 8% Ni16–18% Cr / 10–14% Ni + 2–3% Mo16–18% Cr / 10–14% Ni + 2–3% Mo
Carbon Content0.08% max0.08% max0.030% max (extra low)
General Corrosion Resistance✅ Excellent✅ Excellent✅ Excellent
Chloride / Marine Resistance⚠️ Good (non-submerged only)✅ Very Good✅ Very Good
Pitting & Crevice Corrosion⚠️ Moderate✅ Very Good✅ Very Good
Weld Sensitisation Resistance⚠️ Standard⚠️ Standard✅ Best (low C = no carbide precipitation)
Tensile Strength515 MPa min515 MPa min485 MPa min
Max Service Temp870°C870°C870°C
Best ApplicationsFood, Pharma, Construction, Chemical (mild), WaterMarine, Offshore, Chloride, Chemical (severe)Welded piping, Offshore, Chemical (severe)
Relative CostLowest ✅Higher (Mo premium)Higher (Mo + low C premium)
ASTM Flange StandardA182 Grade F304A182 Grade F316A182 Grade F316L

✅ = Best choice | ⚠️ = Acceptable with conditions. For most food, pharmaceutical, construction, and general industrial piping in Mumbai, SS 304 flanges deliver the best balance of performance and cost. For marine, offshore, and high-chloride environments, SS 316 / SS 316L is recommended. Contact Sankalp Alloys' technical team for grade selection assistance specific to your project requirements.

Why SS 304 Flanges are the Most Popular Choice in Mumbai

Procurement engineers, project managers, and plant maintenance teams across Mumbai's industrial sectors specify SS 304 flanges over carbon steel, galvanised steel, or other alloy alternatives for six compelling reasons:

Why Choose Sankalp Alloys as Your SS 304 Flanges Manufacturer in Mumbai?

🏆 ISO 9001:2015 Certified Manufacturer

Our certified quality management system guarantees consistent product quality across every production batch. EN 10204 3.1 Mill Test Certificate provided with every order — covering full chemical composition and mechanical properties for SS 304 and SS 304L flanges manufactured in Mumbai.

📍 Locally Based in Mumbai — Faster Turnaround

Being based in Mumbai means faster site visits, quicker sample approvals, and reduced lead times for clients across the Mumbai Metropolitan Region, Thane, Navi Mumbai, and Maharashtra compared to out-of-state suppliers.

⚙ Custom Manufacturing Capability

Any size, pressure class, facing type (RF/FF/RTJ), or bore configuration as per international engineering drawings or OEM specifications. Custom orders accepted with no minimum order quantity restrictions.

📦 Export-Grade Packaging from Mumbai

Polythene inner wrap + wooden crate or heavy-duty palletised outer packaging with clear grade marking: SS 304 / UNS S30400 / DIN 1.4301, heat number, size, quantity, and destination — prevents transit damage for both local delivery and export shipments.

⏱ Ready Stock + Fast Delivery

Standard SS 304 flange sizes available from ex-stock in Mumbai for urgent requirements. Custom and bulk orders: 1–3 week production lead time. Same-week local delivery available across Mumbai, Thane, and Navi Mumbai.

💬 Expert Technical Support

Grade selection (SS 304 vs SS 316 vs higher alloys), standard compliance guidance, facing and rating recommendations — our Mumbai-based technical team supports your procurement and engineering teams at every stage of the order process.

💰 Competitive Direct Manufacturer Pricing

As a direct manufacturer based in Mumbai, Sankalp Alloys eliminates trader markups to offer the most competitive SS 304 flange prices for buyers across Maharashtra and pan-India. Volume discounts and long-term supply contracts available for bulk and repeat orders.

📋 Complete Documentation Package

EN 10204 3.1 MTC, COC, COO, commercial invoice, packing list, and third-party test reports from SGS, Bureau Veritas, TUV, or Lloyd's Register — complete documentation package for every shipment, whether delivered locally in Mumbai or exported internationally via Nhava Sheva (JNPT).

Our Manufacturing & Supply Process — From Inquiry to Delivery

Inquiry

Share your SS 304 flange grade (304 / 304L), type, size, pressure class, facing, quantity, and delivery location (Mumbai or elsewhere) via email, WhatsApp, or our contact form. Our team responds within 24 hours.

Quotation

We provide competitive pricing, stock availability, lead time, and full documentation list within 24 hours of your inquiry.

Order Confirmation

PO received and order entered into production at our Mumbai facility. Material sourced from approved Indian and international mills with full heat number traceability and internationally compliant mill certificates.

QC & Testing

Chemical analysis (PMI / spectrometry), mechanical property testing, dimensional inspection per ASME B16.5 / DIN 2576 / EN 1092-1. EN 10204 3.1 MTC and COC generated for acceptance by customers and inspection agencies.

Packaging

Packing in polythene wrap + wooden crates or pallets. Each package clearly marked with grade (SS 304 / UNS S30400), DIN No., heat number, size, quantity, and destination for traceability.

Dispatch

Local delivery across Mumbai, Thane, and Navi Mumbai by road transport, road freight for pan-India delivery, or sea/air freight via Nhava Sheva (JNPT) / Mumbai CSIA for export orders worldwide.

Quality Standards & Certifications — SS 304 Flanges from Mumbai

All SS 304 flanges from Sankalp Alloys are manufactured, tested, and certified in compliance with international standards accepted by project engineers, procurement authorities, and inspection agencies:

ASTM A182 Grade F304 ASTM A240 Grade 304 ASME B16.5 ASME B16.47 ASME B16.36 ASME B16.48 DIN 2576 / 2633 / 2635 DIN 2502 / 2527 EN 1092-1 BS 4504 MSS-SP-44 ISO 9001:2015 EN 10204 3.1 MTC NACE MR0103 NSF/ANSI 61 Third-Party: SGS / BV / TUV / Lloyd's / DNV

SS 304 Flanges Supply Across Mumbai & Maharashtra — Key Industrial Zones

Sankalp Alloys manufactures and supplies SS 304 flanges directly from Mumbai, serving clients across the Mumbai Metropolitan Region and Maharashtra's major industrial belts:

🏙️ Mumbai City & Suburbs

Serving fabrication workshops, EPC contractors, and industrial buyers across South Mumbai, Andheri, Kurla, Vikhroli, Ghatkopar, and the Mumbai Port and Nhava Sheva (JNPT) industrial belt — with same-week local delivery for standard SS 304 flange sizes.

🏙️ Thane & Navi Mumbai

Supplying SS 304 flanges to manufacturing units and process plants across Thane, Bhiwandi, Kalyan-Dombivli, Navi Mumbai, Taloja, and Turbhe MIDC — key industrial estates within the greater Mumbai region.

🏙️ Western Maharashtra

Serving clients across Pune, Pimpri-Chinchwad, Nashik, and Aurangabad — major industrial cities within Maharashtra connected to our Mumbai manufacturing base via efficient road logistics.

🏙️ Tarapur & Palghar Industrial Belt

Supplying SS 304 flanges to chemical, pharmaceutical, and process industry clients in the Tarapur MIDC, Boisar, and Palghar industrial belt — one of Maharashtra's largest concentrations of chemical and process manufacturing units.

All Mumbai & Maharashtra zones served by Sankalp Alloys:

MumbaiAndheriKurla ThaneBhiwandiNavi Mumbai TalojaKalyan-DombivliVasai-Virar TarapurBoisarPalghar PunePimpri-ChinchwadNashik AurangabadRaigadPanvel

Pan-India Supply — SS 304 Flanges from Mumbai to Key Industrial Cities

Beyond Mumbai and Maharashtra, Sankalp Alloys supplies SS 304 flanges across India's major industrial corridors, dispatched by road, rail, and air from our Mumbai base:

🏙️ Gujarat — India's Industrial Powerhouse

Serving clients across Ahmedabad, Surat, Rajkot, Vadodara, and the Hazira (Surat) industrial corridor — connected to our Mumbai facility via road freight and Gujarat's own ports for further export.

🏙️ Delhi NCR & North India

Supplying SS 304 flanges to Delhi, Faridabad, Gurgaon, Noida, Ludhiana, and Chandigarh via road transport and rail freight from Mumbai.

🏙️ South India

Serving the industrial clusters of Chennai, Coimbatore, Hyderabad, Bengaluru, and Vizag — delivered by road and rail freight, or routed through Chennai Port for southern export destinations.

Key Indian cities served by Sankalp Alloys from Mumbai:

AhmedabadSuratVadodara RajkotDelhiGurgaon NoidaChandigarhLudhiana ChennaiCoimbatoreBengaluru HyderabadVizagKolkata IndoreNagpurJaipur

Global Export — SS 304 Flanges from Mumbai to 50+ Countries

In addition to local and pan-India supply, Sankalp Alloys exports SS 304 and SS 304L flanges from Mumbai — via Nhava Sheva (JNPT), India's largest container port — to industrial clients in 50+ countries across 6 continents:

🌍 Middle East (Primary Export Market)

We export SS 304 flanges from Mumbai to the UAE (Dubai, Abu Dhabi, Sharjah), Saudi Arabia (Riyadh, Jeddah, Dammam), Qatar, Kuwait, Bahrain, and Oman — for food processing, water treatment, construction, and general industrial piping applications across the GCC.

🌍 Europe, USA & Asia Pacific

Exporting to Germany, United Kingdom, Netherlands, Italy, USA, Canada, Singapore, Malaysia, Australia, and Japan from our Mumbai facility, leveraging Nhava Sheva's extensive global shipping line connectivity.

🌍 Africa & Latin America

Supplying to South Africa, Nigeria, Kenya, Egypt, and Latin America including Brazil and Mexico — shipped via Mumbai's Nhava Sheva port to these growing export markets.

Complete global export country list:

United Arab Emirates
Saudi Arabia
Qatar
Kuwait
Bahrain
Oman
Germany
United Kingdom
Netherlands
Italy
France
Spain
USA
Canada
Singapore
Malaysia
Indonesia
Thailand
Australia
Japan
South Korea
Bangladesh
Sri Lanka
South Africa
Nigeria
Egypt
Kenya
Brazil
Mexico
Argentina
Turkey

Packaging, Delivery & Documentation from Mumbai

Packaging: All SS 304 flanges supplied from Mumbai by Sankalp Alloys are packed in polythene wrap and placed in wooden crates or palletised for road and freight transport. Every package is permanently marked with: SS 304 grade, UNS number (S30400), DIN designation (1.4301), heat number, flange type, size, pressure class, quantity, and Sankalp Alloys company name — ensuring full traceability from our Mumbai facility to your site, whether local, pan-India, or export.

Lead Time: Standard SS 304 flange sizes are available from ex-stock in Mumbai or within a few days for local and Maharashtra delivery. Custom sizes, special facings, and large-volume orders: 1–3 weeks production lead time. Expedited production available for urgent project or shutdown requirements.

Local Delivery & Export Shipping: Same-week road delivery across Mumbai, Thane, and Navi Mumbai. Road and rail freight for pan-India delivery. Sea freight from Nhava Sheva (JNPT, Mumbai) — India's largest container port — and air freight from Mumbai (CSIA) for international orders, with established freight forwarding partners ensuring on-time delivery and smooth customs clearance.

Documentation provided for every order:

Frequently Asked Questions — SS 304 Flanges Manufacturer in Mumbai

Sankalp Alloys manufactures the complete range of Stainless Steel 304 (UNS S30400 / DIN 1.4301) and SS 304L (UNS S30403 / DIN 1.4307) flanges in Mumbai. Types include weld neck, slip-on, blind, socket weld, threaded, lap joint, plate, orifice, spectacle blind, ring type joint, and reducing flanges — all with EN 10204 3.1 MTC documentation, in ASTM A182 F304, ASME B16.5, ASME B16.47, DIN, and EN 1092-1 standards.
SS 304 (UNS S30400 / DIN 1.4301) is an austenitic 18/8 stainless steel — containing 18% chromium and 8% nickel — that is the most widely used stainless steel grade in the world. In flanges, SS 304 is preferred because it offers excellent general corrosion resistance, good mechanical strength (515 MPa tensile), good weldability, FDA/EU food contact compliance, and the lowest cost among stainless steel alloys. It is widely specified for food processing, pharmaceutical, chemical, water treatment, and general industrial piping flanges manufactured in Mumbai.
Sankalp Alloys serves clients across Mumbai and the Mumbai Metropolitan Region including Andheri, Kurla, Thane, Bhiwandi, Navi Mumbai, Taloja, and the Tarapur-Palghar industrial belt, with same-week local delivery for standard SS 304 flange sizes. We also supply across Maharashtra (Pune, Nashik, Aurangabad) and pan-India.
Yes. Every SS 304 flange order from Sankalp Alloys in Mumbai includes an EN 10204 3.1 Mill Test Certificate (MTC) covering full chemical composition (Cr, Ni, C, Mn, Si, P, S, N) and mechanical properties (tensile strength, yield strength, elongation, hardness), Certificate of Conformance (COC) to applicable ASTM / ASME / DIN standards, and Certificate of Origin (COO) for export orders. Third-party inspection reports from SGS, Bureau Veritas, TUV, or Lloyd's Register are arranged on request for major projects.
SS 304 (UNS S30400 / DIN 1.4301) contains 18% Cr and 8% Ni — offering excellent general corrosion resistance and is the most cost-effective austenitic stainless steel flange for most industrial, food, pharmaceutical, and construction applications. SS 316 (UNS S31600 / DIN 1.4401) adds 2–3% molybdenum, which significantly improves resistance to chloride pitting, crevice corrosion, and marine environments — making SS 316 flanges the preferred choice for marine, offshore, coastal, and aggressive chemical environments. For applications not involving direct chloride exposure, SS 304 flanges from Mumbai offer better value with equivalent corrosion performance.
While headquartered in Mumbai, Sankalp Alloys supplies SS 304 flanges across Maharashtra (Pune, Nashik, Aurangabad) and pan-India to cities including Ahmedabad, Surat, Delhi NCR, Chennai, Hyderabad, and Bengaluru, as well as to export customers in 50+ countries via Nhava Sheva (JNPT) port.
Yes. Sankalp Alloys manufactures custom SS 304 and SS 304L flanges in non-standard sizes, special bore dimensions, special facings (RF, FF, RTJ), and custom drilling patterns as per client engineering drawings, OEM specifications, or project data sheets, with no minimum order quantity restrictions for bulk customers.
SS 304 flange prices from Mumbai depend on the flange type (weld neck / slip-on / blind / socket weld), size, pressure class, facing type, quantity, and current stainless steel market rates. As a direct manufacturer based in Mumbai with no intermediary markups, Sankalp Alloys offers highly competitive SS 304 flange prices. Please contact us with your specific type, size, class, and quantity for an accurate written quotation within 24 hours.

Conclusion — Your Trusted SS 304 Flanges Manufacturer in Mumbai

SS 304 stainless steel flanges (UNS S30400 / DIN 1.4301) represent one of the most widely used and trusted piping solutions for food processing, pharmaceutical, chemical, construction, water treatment, marine (above-waterline), and general industrial applications. Mumbai — with its strategic port access, established stainless steel supply chain, and dense industrial base across Maharashtra — is a premier source for SS 304 flanges, and Sankalp Alloys stands at the forefront of this industry.

As a proven SS 304 Flanges Manufacturer in Mumbai, Sankalp Alloys brings together ISO 9001:2015 certified manufacturing; a complete product range across all SS 304 flange types and sizes; full material traceability with EN 10204 3.1 MTC; ASTM A182 F304 / ASME B16.5 / DIN / EN compliance; competitive direct-manufacturer pricing; fast local delivery across Mumbai and Maharashtra plus export logistics via Nhava Sheva (JNPT); and dedicated technical support — making us the preferred partner for SS 304 flange procurement.

Whether you need standard stock SS 304 flanges for immediate delivery in Mumbai, custom-engineered SS 304L flanges to your project specification, or a reliable long-term supply agreement for ongoing requirements — Sankalp Alloys is your dependable, quality-assured SS 304 flanges manufacturer in Mumbai.

Request a Quote for SS 304 Flanges — Manufactured in Mumbai

Share your requirements: Flange Type, Size, Pressure Class, Facing, Quantity, and Delivery Location — and receive a competitive quotation within 24 hours from our technical sales team in Mumbai.

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