Forging ASTM A182 F310 Stainless Steel Flanges In Mumbai Since 2012 Weld Neck, Slip On, Blind, Socket Weld, Threaded & Lap Joint, Class 150–2500 Heat-Resisting Grade Stock, Shipped To 19+ Countries

Stainless Steel 310 Flanges

Stainless Steel 310 Flanges Technical Quick Reference

Governing StandardASTM A182 / ASME SA-182 Gr. F310
UNS / WerkstoffS31000 / 1.4840
Flange TypesWeld Neck, Slip On, Blind, Socket Weld, Threaded, Lap Joint
Size Range1/2″ to 24″ • 26″ to 48″ large diameter
Pressure Class150, 300, 400, 600, 900, 1500, 2500
FacingRF, FF, RTJ, T&G, M&F
Alloying Elements24.00–26.00% Chromium, 19.00–22.00% Nickel
Manufacturing ProcessClosed-Die Forged & CNC Machined
Delivery ConditionSolution Annealed & Water Quenched
MTC CertificateEN 10204 Type 3.1
Delivery TimeEx-Stock: 24–72 Hrs • Cut-To-Order: 2–4 Wks
HS Code73072100
Up To 1150°C
Continuous & Intermittent Service
Rated oxidation resistance that holds up in kiln, furnace and boiler duty
Full NDT Coverage
UT, DP & Visual On Every Lot
Forging integrity checked before machining, not just before dispatch
In-House Forging
Closed-Die, No Outsourced Stages
Billet to finished flange under one roof, so lead times stay in our control
Global Documentation
EN 10204 3.1 & 3.2 On Request
Paperwork built for customs, TPI and site inspection without follow-up emails
Grade Verification
310 vs 310S Confirmed Pre-Dispatch
Carbon content checked against your operating temperature before the crate is sealed
stainless steel 310 flanges

 

0 · at glance

Mortec At A Glance

Established

Since 2012 • 14 yrs in stainless flange forging

Manufacturing Units

2 in-house units • Taloja & Mazgaon

Stockyard Area

8,850+ sq.ft • Ready-stock inventory

Certifications

ISO 9001:2015 • GST, IEC & MSME

Clientele

100+ clients • India & export markets

Export Reach

19+ countries • GCC, Africa & Americas

Testing Offered

PMI, hydrostatic & chemical • MTC EN 10204 3.1

Shipment Documents

Invoice, Packing List • COO, COI, MTC, BL & Lab Report

Genuine ASTM A182 F310 Blind Flange Manufacturer in India With Pressure Class 150 to 2500 LBS

Heat is the reason buyers from South Africa, the UAE, Kenya and Canada land on this grade in the first place. A 304 or 316 flange face will start scaling under reformer skirts, kiln seals, calciner ducting and flue gas headers long before this one does, and a scaled face is usually what turns a planned shutdown into one extra day nobody budgeted for. Our Mumbai works forges and finishes stainless steel 310 flanges from half inch through 24 inch against ASME B16.5, with the 26 inch to 48 inch range machined to ASME B16.47 Series A and B, spanning Class 150 through Class 2500. Depending on how the drawing reaches us, the same material may be called out as SS 310 flanges, UNS S31000 flanges, AISI 310 flanges or Werkstoff 1.4840 flanges, and it's available in weld neck, slip on, blind, socket weld, threaded and lap joint form.

Every flange ships solution annealed and water quenched, heat-number stamped, PMI checked, and backed by an EN 10204 Type 3.1 mill test certificate. Because billet cutting, closed-die forging, annealing and CNC facing all happen under our own roof and one quality plan, there's no outside job-work margin sitting inside your quote. Share your service temperature with the size and class, and our grade desk will tell you upfront whether standard F310 or the low-carbon F310S is what your application actually needs.

01 · Specification

Stainless Steel 310 Flanges Specification

Drop your line list with an A182 F310 Slip on Flange callout and our desk returns a rate the same working day.

stainless steel 310 flanges specification  

ASTM A182 F310 Blind Flange Dimensional Codes

  • ASME B16.5 & ASME B16.47 Series A / B
  • EN 1092-1, DIN 2527/2573, BS 4504, JIS B2220

UNS S31000 Slip On and Weld Neck Flange Bore Matching

  • Bored to suit SCH 5S through SCH 160 and XXS
  • Counterbore cut to your mating pipe ID on request

310 Stainless Steel SORF Flanges Face Finish

  • Serrated spiral 125–250 AARH supplied as standard
  • Smooth or concentric serration cut when specified

Stainless Steel 1.4840 Weld Neck Flange Test Scope

  • Hydrostatic, dye penetrant and ultrasonic testing
  • Intergranular corrosion test to ASTM A262 on request

SS A182 F310 BLRF Flanges Inspection Release

  • Witnessed by SGS, BV, TUV, LRS, Intertek or your engineer
  • ISO 9001:2015 system with stage-wise clearance points

SUS 310 Pipe Flanges Marking Detail

  • Grade, size, class, heat number and standard on the OD
  • Low-stress stamping plus a colour band where asked

SS A182 F310 Spectacle Blind Flanges Packing

  • ISPM 15 fumigated plywood cases with VCI wrap
  • Face protectors fitted, item-wise crate identification

AISI 310 Lap Joint Flanges Compliance Options

  • NACE MR0175 / ISO 15156 papers where the spec permits 310
  • PED 2014/68/EU documented route for European projects

WNR 1.4840 Socket Weld Flange Supporting Items

  • Spiral wound and ring joint gaskets to ASME B16.20
  • Matching S31000 studs and nuts turned from A276 bar

Buy UNS S31000 Slip On and Weld Neck Flange with Size Range From 1/2 to 48″ At Lowest Price

02 · Codes We Follow

ASTM A182 F310 Blind Flange Manufacturing Standards

Two codes govern every piece we release, one for the metal itself and one for the dimensions it is cut to.

ASTM A182
ASME SA-182
ASME B16.5
ASME B16.47
ASME B16.36
ASME B16.48
MSS SP-44
EN 1092-1
DIN 2527 / 2573
BS 4504
JIS B2220
Client-Specific
03 · Quality

UNS S31000 Slip On and Weld Neck Flange Testing & Certification

Stainless Steel 310 Flanges exporter marks off ITP requirements and logs findings onto the accompanying crate document.

Chemical Analysis
PMI Testing
Heat-Lot Traceability
Tensile Test
Hardness Test
IGC Test ASTM A262
Ultrasonic Test
Dye Penetrant Test
Hydrostatic Test
Dimensional Inspection
Third-Party Inspection
MTC EN 10204 3.1
04 · Industries

310 Stainless Steel SORF Flanges Applications

Stainless Steel 310 Flanges Manufacturer in Mumbai supplies joints built for prolonged heat and oxidising exposure without failure.

Furnace & Kiln Internals
Flue Gas & Duct Systems
Thermal Power Plants
Cement & Lime Calciners
Petrochemical Reformers
Ore Roasting & Smelters
Waste Incineration Plants
Food & Sugar Processing
05 · Product Range

SS A182 F310 Slip on Flange Types

Six of these move off our floor faster than the rest, and each piece gets faced, bored and marked before it's crated.

Stainless Steel 1.4840 Weld Neck Flange

Stainless Steel 1.4840 Weld Neck Flange

ASME B16.5 • 1/2″–24″
  • Tapered hub carries thermal and bending load
  • Bore cut to your schedule before the crate is closed
ASTM A182 F310 Blind Flange

ASTM A182 F310 Blind Flange

ASME B16.5 • Class 150–2500
  • Closes a header end or a spare vessel nozzle
  • Drilled and tapped for instrument tappings to order
AISI 310 Lap Joint Flanges

AISI 310 Lap Joint Flanges

With Stub End • 1/2″–24″
  • Spins freely so bolt holes line up in seconds
  • Only the stub end needs to be the costly grade
SS A182 F310 Slip on Flange

SS A182 F310 Slip on Flange

ASME B16.5 • Class 150–600
  • Drops over the pipe and takes two fillet welds
  • Forgiving on site alignment, lighter on the budget
ASTM A182 F310 Threaded Flange

ASTM A182 F310 Threaded Flange

NPT / BSP • Up To 6″
  • Screws straight on with no hot work at site
  • Suited to utility lines free of thermal cycling
WNR 1.4840 Socket Weld Flange

WNR 1.4840 Socket Weld Flange

ASME B16.5 • Up To 4″
  • Recessed socket with a single external fillet weld
  • Chosen for small-bore high-pressure branch runs

Stainless Steel 310 Flanges Manufacturer In Mumbai, Own Forging Plant Running Since 2012

Give us the size, class and facing and the works rate reaches you before the day closes.

Request Quote Now
06 · Composition

Stainless Steel 1.4840 Weld Neck Flange Chemical Composition

Each heat is certified against the ASTM A182 Grade F310 limits for UNS S31000, weight percent basis.

Cr24.00–26.00Chromium
Ni19.00–22.00Nickel
C0.15 maxCarbon
Mn2.00 maxManganese
Si1.00 maxSilicon
P0.045 maxPhosphorus
S0.030 maxSulphur
FeBalanceIron
07 · Strength Data

SS A182 F310 BLRF Flanges Mechanical Properties

Minimums for solution annealed ASTM A182 F310 forgings at room temperature, straight off the certificate we ship.

Tensile Strength515 MPa / 75 ksi min
Yield Strength (0.2%)205 MPa / 30 ksi min
Elongation (in 2″)30% min
Reduction Of Area50% min
Density7.75 g/cm³ / 0.280 lb/in³
Melting Range1400–1450 °C
08 · Cross-Reference

SUS 310 Pipe Flanges Equivalent Grades

If your drawing shows any of these callouts, the forging is the same 25Cr 20Ni family, so check the note first.

USAASTM / ASME (USA)

  • UNS S31000
  • ASTM A182 Gr. F310 (Forgings)
  • ASME SA-182 Gr. F310
  • AISI Type 310

GermanyDIN / EN (Germany)

  • Werkstoff 1.4840
  • X15CrNiSi25-20
  • 1.4845 for the 310S variant

UKBS (United Kingdom)

  • 310S24
  • 310S31 for the low-carbon type

JapanJIS (Japan)

  • SUS 310S
  • Follows JIS B2220 (Flange Form)

FranceAFNOR (France)

  • Z12CN25-20
  • Z8CN25-20 for the low-carbon type

ChinaGB (China)

  • 2Cr25Ni20
  • 06Cr25Ni20 for the low-carbon type
Global Reach

Your 310 Stainless Steel Slip on Flange Source Across Africa And The Gulf

Crated, marked and container ready for cement, smelter, refinery and power buyers around these ports.

Africa & GCC
South AfricaDurban & Johannesburg, SA
KenyaMombasa & Nairobi, Kenya
UgandaKampala, Uganda
UAEJebel Ali & Abu Dhabi, UAE
Saudi ArabiaJubail, Saudi Arabia
TurkeyIstanbul, Turkey
South AfricaRichards Bay, SA
EgyptCairo, Egypt
09 · Grade Choice

SS 310 Blind Flange Vs Stainless Steel 310S Flanges

Stainless Steel 310 Flanges Manufacturer in India often gets asked this since carbon content is what separates these grades.

Stainless Steel 310S Flanges

  • Carbon: Held low, typically 0.08% maximum
  • Welding: Easier, less carbide precipitation risk
  • Creep Strength: Lower at sustained high temperature
  • Wet Corrosion: Preferred where the line also sees condensate
  • Typical Call: Welded fabrications and cyclic duty

Stainless Steel 310 Flanges

  • Carbon: Up to 0.15% under ASTM A182 F310
  • Welding: Workable, needs disciplined heat input
  • Creep Strength: Higher, carbon helps at temperature
  • Wet Corrosion: Adequate, but chosen mainly for dry heat
  • Typical Call: Furnace, kiln and calciner service
10 · Hot Service

AISI 310 Lap Joint Flanges Service Temperature & Sigma Phase Guide

Buyers replacing scaled 304 or 316 joints ask the same four things about temperature. Here they are in one panel.

Where This Grade Sits On The Temperature Scale

Type 310 is a heat-resisting grade rather than a general corrosion grade. Its 25% chromium builds a tight oxide skin that survives hot air, while 20% nickel keeps the structure austenitic so the flange does not go brittle after a season in the furnace. The figures below are the ones that decide whether it suits your line, and the two cautions underneath are what most enquiries miss.

Continuous Service In AirUp to approx. 1150 °C
Intermittent Service In AirUp to approx. 1035 °C
Sigma Phase Caution ZoneSustained 650–870 °C
Solution Anneal Route1040–1065 °C, quenched
Structure DeliveredFully Austenitic, Non-Magnetic
Weak Point To AvoidHot Reducing Sulphur Gas
11 · Sizing

310 Stainless Steel Slip on Flange Size, Class & Facing Range

Every ASME B16.5 pressure class is available, with the fastest moving ones kept finished and ready to ship.

Class 150PN 20 Class 300PN 50 Class 400PN 68 Class 600PN 110 Class 900PN 150 Class 1500PN 250 Class 2500PN 420


Fastest Moving 1″ 2″ 3″ 4″ 6″ 8″

Size & Standard Coverage

ASME B16.51/2″ to 24″
ASME B16.47 Series A & B26″ to 48″
EN 1092-1PN 6 to PN 100
JIS B22205K, 10K, 16K, 20K
Weld Neck BoreSCH 5S to SCH 160 & XXS
Orifice FlangesPer ASME B16.36

Facings & Bolting Detail

Raised Face (RF)Fitted on stock items
Flat Face (FF)For cast or lined equipment
Ring Type Joint (RTJ)Oval & octagonal grooves
Tongue & Groove, M&FCut to your drawing
Bolt HolesStraddle the natural centreline
Gasket MatchingSpiral wound per ASME B16.20
12 · Clearance

ASTM A182 F310 Threaded Flange Documentation

Stainless Steel 310 Flanges Supplier in India readies all paperwork beforehand since port delays cost far more.

Mill Test Certificate 3.1
Certificate Of Origin
Marked Packing List
Bill Of Lading
Commercial Invoice
ISPM 15 Fumigation
Insurance Certificate
Independent Lab Report
13 · Installation

310 SS PN10 Forged Flanges Welding & Installation Data

A 25Cr – 20Ni weld pool is sluggish and holds heat, so the joint is won on filler choice and heat discipline rather than travel speed.

1

Clean And Segregate

Strip oxide, ink and grease clear of the bevel, and keep carbon steel tooling well away from the joint.

2

Match The Filler

ER310 wire to AWS A5.9 or E310-16 electrode to AWS A5.4 for like-for-like joints.

3

Hold Heat Input Down

Stringer beads with a controlled interpass temperature, and no dwell in the sigma phase band.

4

Check And Restore

Dye penetrant root and cap, then pickle and passivate any heat tint left on the face.


Dissimilar JointsWelding 310 to carbon or low alloy steel needs a nickel filler like ERNiCr-3. Tell us both grades, we'll advise.
Preheat And PWHTNo preheat or PWHT needed for austenitic grades unless your spec specifically calls for it.
Matching BoltingS31000 studs and nuts keep the joint one metallurgy when bolting also sits in the hot zone.
Tightening SequenceCross-pattern, four rising passes, then a final round. Re-torque once the line heats up.
Thermal MovementExpands more than carbon steel, so leave room for growth at supports before locking the line down.

ASTM A182 F310 Blind Flange Exporter In India To Durban Port, South Africa

Part loads join our fortnightly Southern Africa consolidation instead of waiting on a full container.

Request Export Quote
Global Reach

Extending Our SS 310 Blind Flange Supply Into North America & ASEAN

Established lanes for buyers in Canada, Mexico, Southeast Asia and the wider Pacific rim.

Americas & ASEAN
CanadaAlberta & Ontario, Canada
USAUnited States
MexicoMexico
VenezuelaVenezuela
ThailandThailand
MalaysiaMalaysia
PhilippinesPhilippines
VietnamVietnam
IndonesiaIndonesia
SingaporeSingapore
14 · Pricing

UNS S31000 Orifice Flanges Price Factors

Four variables set the number. Send all four and you have a firm ex Mumbai works price the same working day.

Forged WeightThe billet is bought by the kilo, so a Class 1500 hub costs far more than the same bore in Class 150.
Nickel And Chromium RatesAt 20% nickel and 25% chromium, this grade tracks the alloy surcharge rather than the plain steel index.
Machining ContentOrifice sets, RTJ grooves and long weld necks take machine hours that a plain slip on simply does not.
Inspection LevelA witnessed release or an IGC test adds both cost and calendar days, so tell us the ITP up front.
15 · How It’s Made

ASTM A182 F310 Nipoflange Manufacturing Process

Four stages, all on our own lines, all under a single quality plan and one heat number.

1

Billet Cut & Upset

S31000 billet sheared to weight and upset into the flange blank profile.

2

Closed-Die Forging

Hub and disc struck in die so grain flow follows the neck contour.

3

Solution Anneal & Quench

Heated into the annealing range then water quenched to fix the austenitic structure.

4

CNC Face, Drill & Stamp

Facing, bore, bolt holes, then PMI check and heat-lot marking.

16 · Turnaround

INOX 310 Weld Neck Flange Delivery Timeline

Packing begins as soon as the advance is confirmed, and the route you pick decides the rest of the calendar.

Ex-Stock Dispatch

Held sizes and classes are marked, crated and handed over within 24 to 72 hours

Sea Freight Route

The economical choice on pallet volumes, with roughly 10 to 30 days on the water

Air Freight Route

For a unit already down, flange sets reach most international hubs in 3 to 6 days

Country-Specific ETA

Give us the discharge port and we come back with a dated arrival window

Global Reach

Stainless Steel 310 Flanges Ready To Sail Across The Middle East & GCC

Ready stock release and made-to-order dispatch for refinery, fertiliser, cement and power buyers around the Gulf.

Middle East & GCC
OmanMuscat & Sohar, Oman
UAEDubai, UAE
Saudi ArabiaDammam, KSA
BahrainManama, Bahrain
KuwaitKuwait City
QatarDoha, Qatar
Saudi ArabiaRiyadh, KSA
TurkeyIzmir, Turkey
17 · Track Record

SS A182 F310 Spectacle Blind Flanges Supply References

A sample of recent heat resisting grade dispatches across our Africa, Gulf, ASEAN and North America customer base.

12″ Class 150 Weld Neck Flanges - Calciner Duct Tie-In

ASTM A182 F310, RF, PMI and dimensional reports enclosed.

Cement Plant Maintenance Team, South Africa

RICHARDS BAY, SOUTH AFRICA

8″ Class 300 Blind Flanges - Reformer Isolation Set

RTJ facing, third-party witnessed release, air freighted.

Refinery Turnaround Contractor, UAE

JEBEL ALI, UAE

4″ Class 150 Slip On Flanges - Flue Gas Sampling Line

Supplied with matching S31000 studs and nuts as sets.

Sugar Mill Boiler House, Kenya

MOMBASA, KENYA

6″ Class 600 Long Weld Neck Flanges - Furnace Header

Custom neck length, ultrasonic tested, CRN data pack.

Power Plant EPC Contractor, Canada

ALBERTA, CANADA

3″ Class 300 Orifice Flange Sets - Hot Gas Metering Skid

Tapped pressure connections, jack screws, full MTC 3.1.

Instrumentation Fabricator, Turkey

ISTANBUL, TURKEY

16″ Class 150 Blind Flanges - Incinerator Access Ports

B16.47 Series A pattern, seaworthy crating, marked item-wise.

Waste-To-Energy Operator, Indonesia

JAKARTA, INDONESIA

Top Export Countries

UAE UAE Turkey Turkey Canada Canada UK United Kingdom Saudi Arabia Saudi Arabia Singapore Singapore United States United States Mexico Mexico Thailand Thailand Italy Italy Netherlands Netherlands Germany Germany Philippines Philippines Malaysia Malaysia Uganda Uganda Indonesia Indonesia South Africa South Africa Vietnam Vietnam Venezuela Venezuela

ASTM A182 Flange Supplier In Mumbai With EN 10204 3.1 Inside Every Crate

Your inspection file is complete on day one because the certificate travels with the goods.

Get Supplier Quote
18 · FAQs

Stainless Steel 310 Flanges FAQs

Common queries buyers raise before placing an order, answered plainly and to the point.

What pressure classes are SS A182 F310 Slip on Flange offered in?

Class 150 through Class 2500 depending on bore size, with PN ratings available for European projects too.

Can ASTM A182 F310 Blind Flange be supplied with third party inspection?

Yes, SGS, BV, TUV or your nominated agency can witness testing and sign off before dispatch.

What makes Stainless Steel 1.4840 Weld Neck Flange suited to furnace piping?

High chromium and nickel content resists scaling under sustained heat, making it ideal for furnace and kiln lines.

How does UNS S31000 Slip On Flange compare against grade 304 in cost?

Higher upfront cost, but far better heat resistance means fewer replacements over the life of the plant.

What bore finish comes standard on 310 Stainless Steel SORF Flanges?

Serrated concentric finish ships as standard, smooth or spiral finish machined on request at no extra lead time.

Are WNR 1.4840 Socket Weld Flange and AISI 310 Lap Joint Flanges kept in stock?

Common sizes stay on the shelf, larger or special dimensions are forged on a made to order basis.

Stainless Steel 310 Flanges - Forged & Faced By Mortec
F310 forgings hold their oxide skin in furnace-hot air
Class 150 to 2500 blanks and 48″ blind discs on floor
Every S31000 flange PMI checked, EN 10204 3.1 issued
Orifice tappings, RTJ grooves and port-marked crates to order

Materials


Standard


Products

Certifications & Credentials
Certified to PED 2014/68/EU for the manufacture of forged steel products
Stock, distribute and trade Steel Flanges, Nuts and Bolts, and precision-machined parts in Nickel Alloys, High Temperature Alloys and Super Alloys
Since 2012, exporting Oil and Gas piping items built to NACE MR0175 / ISO 15156 across the Egypt, Tunisia, Netherlands, Azerbaijan, South Africa, Algeria, Saudi Arabia and Morocco
Hold the largest import and stock inventory of bolting accessories, in both ferrous and non-ferrous metals, in India

Authorized Supplier For The Following Companies - Material At Reseller Price For Traders

Associated Companies - ADNOC, SABIC, Saudi Aramco, GASCO, ORPIC, KNPC, QATARGAS

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