Stainless Steel 304 Flanges Key Facts
Mortec At A Glance
Established
Since 2012 • 15+ yrs experience
Manufacturing Units
2 in-house units • Taloja & Mazgaon
Stockyard Area
8,850+ sq.ft • Ready-stock inventory
Certifications
ISO 9001:2015, PED • GST, IEC & MSME
Clientele
100+ clients • India & export markets
Export Reach
15+ countries • GCC, Africa & APAC
Testing Offered
PMI, IGC & hydro • MTC EN 10204 3.1
Shipment Documents
Invoice, Packing List • COO, COI, MTC, BL & Lab Report
Non-magnetic ASTM A182 F304 Blind Flange Manufacturer in India with MTC
Mortec Manufacturing Co is a dedicated Stainless Steel 304 Flanges Manufacturer in India. We machine every ASTM A182 Grade F304 flange from certified UNS S30400 billet. All work happens at our own Mumbai plant. Each blank is heat-numbered before CNC turning begins. Solution annealing runs between roughly 1040°C and 1150°C. A rapid water quench follows, keeping the chromium-nickel structure fully austenitic and non-magnetic. Controlled carbon content protects the flange against carbide precipitation at the weld line. We also manufacture Stainless Steel 304 Spectacle Flanges and 304 Tongue & Groove Flanges.
Machining follows ASME B16.5, ASME B16.47 Series A/B, MSS SP-44. We offer RF, FF, RTJ facing in smooth or serrated finish. Custom bore drilling is done as per your isometric. As a direct Stainless Steel 304 Flanges Supplier In India, we hold stock. We also supply SS 304 Orifice Flange types ex-stock. Weld Neck, Slip-On, Blind, Socket Weld and Threaded types are ex-stock. Sizes range from Class 150 through 1500. Dispatch happens within three to five days. Every order includes PMI reports and intergranular-corrosion test data. We also provide EN 10204 3.1 or 3.2 mill test certificates.
Table of Content
Stainless Steel 304 Flanges Specification
Get your Stainless Steel 304 Flanges quote from the forge floor with MTC and traceability paperwork bundled.
304 Flange Face & Thread Options
- RF, FF, RTJ facing
- NPT, BSPT, BSPP thread
SS 304 Flanges Dimensional Standards
- ASME B16.5
- ASME B16.47 Series A & B
- MSS SP-44
A182 F304 Flanges Heat Treatment & Finish
- Solution annealed ≈1040–1150°C, water quenched
- Smooth, serrated, polished finish
UNS S30400 Flange Testing Methods
- PMI, intergranular corrosion test ASTM A262
- Third-party inspection (TPI) on request
AISI 304 Flanges Food & Water Compliance
- NSF/ANSI 61 on request
- FDA 21 CFR 177.2600-listed contact surface
INOX 304 Weld Neck Flanges Supporting Material & Packing
- Gaskets, stud bolts, ring joints
- Anti-tarnish, export-grade packing
SUS 304 Hot Forged Flange Raw Material Source
- Billet/bar to ASTM A276 / A479
- Full heat-to-flange traceability
Stainless Steel 304 Flanges Quality Systems
- ISO 9001:2015 certified plant
- Factory / client audits welcome
Stainless Steel 304 Flanges Manufacturer In Mumbai Since 2012
Tell us the NPS, pressure class and face type - we confirm ex-stock 304 stock and pricing within the hour.
ASTM A182 F304 Flange Dimensions
Popular Stainless Steel 304 flanges are kept ex-stock; ASME B16.5 dimensions apply to all sizes.
Available Sizes
Full Dimensional Charts
Complete OD, bolt-circle and bolt-hole dimensions for Class 150 through Class 1500 are published below per ASME B16.5. Send your size and class for a same-day ex-Mumbai quotation on the complete chart.
Request Full Dimension Chart| NPS | DN | Class | OD | Bolt Circle | Bolt Holes | Bolt Size |
|---|---|---|---|---|---|---|
| ½″ | DN15 | 150 | 89 | 60 | 4 | ½″ |
| 300 | 95 | 66 | 4 | ⅝″ | ||
| 600 | 95 | 66 | 4 | ⅝″ | ||
| 1500 | 120 | 82.6 | 4 | ¾″ | ||
| 2″ | DN50 | 150 | 152 | 121 | 4 | ⅝″ |
| 300 | 165 | 127 | 8 | ¾″ | ||
| 600 | 165 | 127 | 8 | ¾″ | ||
| 1500 | 216 | 165 | 8 | 1″ | ||
| 4″ | DN100 | 150 | 229 | 190 | 8 | ⅝″ |
| 300 | 255 | 200 | 8 | ⅞″ | ||
| 600 | 275 | 216 | 8 | 1″ | ||
| 1500 | 308 | 241 | 8 | 1⅛″ | ||
| 6″ | DN150 | 150 | 279 | 241 | 8 | ¾″ |
| 300 | 320 | 270 | 12 | ⅞″ | ||
| 600 | 355 | 292 | 12 | 1″ | ||
| 1500 | 410 | 330 | 12 | 1¼″ | ||
| 8″ | DN200 | 150 | 343 | 298 | 8 | ¾″ |
| 300 | 380 | 330 | 12 | 1″ | ||
| 600 | 420 | 356 | 12 | 1⅛″ | ||
| 1500 | 483 | 387 | 12 | 1⅜″ | ||
| 12″ | DN300 | 150 | 483 | 432 | 12 | ⅞″ |
| 300 | 521 | 451 | 16 | 1¼″ | ||
| 600 | 559 | 489 | 20 | 1¼″ | ||
| 1500 | 648 | 514 | 16 | 1⅞″ |
SS 304 Blind Flanges Weight Chart
UNS S30400 density is about 7,900 kg/m³, close to carbon steel; exact weight accompanies every drawing.
| Standard | Class | Dia. of Bolt Circle | Size of Bolt | Bolt Hole Dia. | Dia. | Bolts No. |
|---|---|---|---|---|---|---|
| ISO 7005 (DIN) Flange | PN10 Flanges | 65 | M12 | 14 | 95 | 4 |
| PN40 Flanges | 65 | M12 | 14 | 95 | 4 | |
| PN6 Flanges | 55 | M10 | 11 | 80 | 4 | |
| PN20 Flanges | 60.5 | M14 | 16 | 90 | 4 | |
| PN25 Flanges | 65 | M12 | 14 | 95 | 4 | |
| PN16 Flanges | 65 | M12 | 14 | 95 | 4 | |
| AS 2129 Flange | Table J Flanges | 83 | 16 | 17 | 114 | 4 |
| Table C Flanges | 67 | 13 | 14 | 95 | 4 | |
| Table F Flanges | 67 | 13 | 14 | 95 | 4 | |
| Table D Flanges | 67 | 13 | 14 | 95 | 4 | |
| Table H Flanges | 83 | 16 | 17 | 114 | 4 | |
| Table E Flanges | 67 | 13 | 14 | 95 | 4 |
304 Stainless Steel Flange Marking & Packing
Every flange is stamped and packed so your yard can trace it back to the original heat.
Stainless Steel 304 Flanges Exporter In India To Mombasa & Durban Ports
Kenyan and South African buyers get NSF-compliant 304 stock backed by a full mill test certificate pack.
UNS S30400 Blind Flange Testing
Standard checks run on every heat; additional witness testing is arranged on request.
304 SS Blind Flange Pressure Rating
Stainless Steel 304 flanges follow ASME B16.5 Group 2.1 pressure-temperature ratings.
150#Class 150
Lightest section, broadest ex-stock availability across every 304 flange type.
300#Class 300
Most-specified class for general process, food and water-treatment piping.
600#Class 600
Used on higher-pressure utility and chemical transfer line connections.
900#Class 900
Thicker hub section specified for elevated-pressure process headers.
1500#Class 1500
Ex-stock for select sizes; kept for high-pressure tie-ins.
2500#Class 2500
Heaviest section in the range, produced to mill order on confirmed size.
SS 304 Pipe Flange Size Range
Ex-stock and mill-order size coverage runs across the full ASME B16.5 / B16.47 spread.
Stainless Steel 304 Flanges Standards
Material, dimensional and testing standards buyers typically reference on their PO.
304 Stainless Steel Flange Face Types
Stainless Steel 304 Flanges face finish is matched to gasket type and service, confirmed at RFQ stage.
Certified UNS S30403 Tongue Groove and Spectacle Flanges Size Ranging From 1/2 to 60" as per ANSI B16.5
Stainless Steel 304 Flanges Types
Stainless Steel 304 Flanges Manufacturer in India producing Threaded, Lap Joint, Spectacle and Orifice types alongside the standard range.
ASTM A182 F304 Weld Neck Flange
ASME B16.5 • ½″–24″- Tapered hub, full penetration weld
- Best for cyclic or high-flow process lines
SS 304 Slip-On Flange
ASME B16.5 • Class 150–600- Fast-fit, lower fabrication cost
- Suited to low-pressure process service
UNS S30400 Blind Flange
ASME B16.5 • All Classes- Seals pipe ends & vessel nozzles
- No bore machining required
304 Stainless Steel Socket Weld Flange
ASME B16.5 • ≤4″ NB- Bore-fit socket, single fillet weld
- Good for small-bore instrument lines
INOX 304 Threaded Flange
ASME B16.5 • ≤4″ NB- Weld-free, bolted assembly
- Preferred where site welding is restricted
SUS 304 Lap Joint Flange
ASME B16.5 • With Stub End- Free rotation for bolt alignment
- Ideal for frequent dismantling
WNR 1.4301 Spectacle Flange
MSS SP-44 • Line Isolation- Figure-8 open/closed positive block
- Standard for maintenance isolation
AISI 304 Orifice Flange
ASME B16.36 • Class 300–900- Jack-screw tapped for meter runs
- Used for custody-transfer flow metering
ASTM A182 S30403 Blind Flange Chemical Composition
Controlled Cr, Ni and low carbon content give Stainless Steel 304 its stable austenitic structure.
AISI 304 Flanges Mechanical Properties
ASTM A182 defines minimum room-temperature properties for F304 forgings in the solution-annealed condition.
WNR 1.4301 Forged Flanges Material Equivalent
Stainless Steel 304 carries an equivalent designation across major piping standards, same chemistry.
ASTM / ASME (USA)
- UNS S30400 - ASTM A182 Gr F304 (Forgings)
- ASTM A240 (Plate / Sheet / Strip)
- ASTM A276 / A479 (Bar)
- ASME SA182 (Flanges)
DIN / EN (Germany)
- Werkstoff 1.4301
- EN X5CrNi18-10
- EN 10222-5 (Forgings)
JIS / Trade Names
- SUS304 (JIS G4303)
- AISI 304 • 18/8 (Trade Name)
UK / Testing
- BS 304S31
- ASTM A262 (Intergranular Corrosion)
ASTM A182 F304 Flange Supplier In Dubai - NSF/ANSI 61 Compliant Stock
Passivated 304 stock ready for third-party inspection and rapid GCC dispatch.
304 Vs 316 Stainless Steel Flanges
Both are austenitic Cr-Ni grades. Grade 316 adds molybdenum for stronger chloride and pitting resistance.
Stainless Steel 304 (S30400) - This Grade
- Chemistry: 18–20% Cr, 8–11% Ni
- Molybdenum: None
- Best For: Food, potable water, mild chemical duty
- Relative Cost: Lower
Stainless Steel 316 (S31600)
- Chemistry: 16–18% Cr, 10–14% Ni
- Molybdenum: 2–3%
- Best For: Marine, higher-chloride, pharma duty
- Relative Cost: Higher
Magnetic Properties Of INOX 304 Weld Neck Flanges
Buyers across UAE and Canada frequently ask whether SS 304 is magnetic before specifying it on instrument lines.
UNS S30400 Blind Flange Supplier In Toronto For Water & Food-Grade Projects
Traceable low-carbon 304 stock ships with NSF documentation for Canadian potable-water orders.
SUS 304 Hot Forged Flange Food-Grade Compliance
Dairy, beverage and water utility buyers across Kenya and Canada ask for this documentation most.
304 Stainless Steel Flanges Corrosion Resistance & Passivation
Passivation and service limits matter most to mining and chemical buyers across South Africa and the UAE.
UNS S30400 Flange Applications & Industries
These are the industries that specify Stainless Steel 304 flanges most often, and why.
Stainless Steel 304 Flanges Delivery Estimate
Once your size, class and quantity are matched against our ready stock, here is the lead time you can expect.
Ex-Stock Dispatch
- Confirmed 304 stock leaves our Mumbai unit within 3–5 working days
Sea Freight
- Ocean transit typically spans 15–35 days and depends on the destination port
Air Freight
- Urgent 304 flange orders fly out in 3–6 days for breakdown situations
Country-Specific ETA
- Precise door delivery schedule confirmed once your RFQ is finalized
Stainless Steel 304 Flange FAQs
Quick answers to the questions buyers ask us most before placing an order.
Is the SS 304 Slip On Flange available ex-stock?
Yes, SS 304 Slip On Flange ships ex-stock, Class 150–600.
Is Stainless Steel 304 flange magnetic?
No, F304 stays non-magnetic in the annealed, solution-treated condition.
What is the difference between 304 and 316 flanges?
316 adds 2–3% molybdenum for stronger chloride and pitting resistance.
Can SS 304 flanges be used for potable water?
Yes, NSF/ANSI 61 and FDA-compliant 304 stock is available on request.
What classes does the ASTM A182 F304 Blind Flange cover?
Stocked across Class 150 through 1500, with 2500 produced to mill order.
Authorized Supplier For The Following Companies - Material At Reseller Price For Traders
