Lean Duplex Flange Manufacturer, Solution Annealed On Our Own Lines Slip On, Weld Neck, Blind, Orifice, Spectacle Blind & Lap Joint, Class 150–2500 Forging UNS S32101 Since 2012, Shipped To 19+ Countries

Duplex 2101 Flanges

Duplex 2101 Flanges Quick Spec Guide

Alloying Elements21.0–22.0% Chromium, 4.00–6.00% Manganese
UNS / WerkstoffS32101 / 1.4162
Manufacturing ProcessClosed-Die Forged & CNC Machined
Delivery ConditionSolution Annealed & Water Quenched
HS Code73072100
Flange TypesSlip On, Weld Neck, Blind, Socket Weld, Lap Joint
FacingRF, FF, RTJ, T&G, M&F
Material StandardASTM A182 / A240 • EN 10088
Size Range1/2″ to 24″ • 26″ to 60″ large diameter
Delivery TimeEx-Stock: 24–72 Hrs • Cut-To-Order: 2–4 Wks
Pressure Class150, 300, 400, 600, 900, 1500, 2500
MTC CertificateEN 10204 Type 3.1
Dual-Melt Traceable
VIM Plus VAR Heat Records
Every heat lot traced back to its double-melt certificate
48-Hour Dispatch
On Ready-Stock Weld Neck Sizes
Common classes and NPS sizes picked straight from stock racks
Aerospace-Grade Chemistry
AMS 5662 And AMS 5663 Compliant
Same forging quality demanded by turbine and rocket motor buyers
700 Degree C Rated
Strength Retained Under Heat
Precipitation hardened structure built for hot-section service
In-House Aging Furnace
No Outsourced Heat Treatment
Solution treat and two-stage age controlled on our own floor
Witnessed Hardness Checks
331 HBW Minimum Verified
Third-party witness available before the crate is sealed
duplex 2101 flanges

 

0 · at glance

Mortec At A Glance

Established

Since 2012 • 14 yrs in duplex & stainless flanges

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, ferrite count & hydrostatic • MTC EN 10204 3.1

Shipment Documents

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

Cost savings Lean Duplex 2101 Slip On Flange Manufacturer in India in Custom Sizes

Enquiries for this grade reach us mostly from South Africa, the UAE, Kenya and Canada, and the reason is nearly always the same one. A water header, a tailings line or a tank nozzle needs more yield strength than 316L can offer and better resistance to chloride cracking, but the budget will not carry a 2205 or 6 moly bill of material. Lean duplex 2101 sits exactly in that gap, and we forge it at our Mumbai works from half inch through 24 inch, with 26 inch to 60 inch machined to order, in Class 150 right up to 2500. On drawings and purchase orders the same material turns up as Lean Duplex 2101, LDX 2101, UNS S32101 and EN 1.4162, and we supply it as slip on, weld neck and blind flanges from ready stock.

Nickel sits between 1.35 and 1.70 percent in this grade against roughly 10 to 14 percent in 316L, so your landed cost tracks the nickel exchange far less sharply, which is what keeps repeat orders coming back to lean duplex. Every flange is solution annealed and water quenched on our own line, ferrite counted, PMI checked and issued with an EN 10204 Type 3.1 mill test certificate before the crate is closed. Send us the class, facing and bore, our grade desk sanity-checks the chloride level and temperature against the pitting number, and only then do we release the job.

01 · Specification

Duplex 2101 Flanges Specification

Mortec, an active Duplex 2101 Flanges exporter, converts your submitted line list into a firm ex Mumbai rate.

duplex 2101 flanges specification  

EN 1.4162 Plate Flanges Dimensional Standards

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

UNS S32101 Weld Neck Flange Bore & Schedule

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

2101 Duplex Reducing Flange Face Finish

  • Serrated spiral 125–250 AARH as standard
  • Smooth or concentric finish where the gasket demands it

Duplex 2101 Long Neck Flanges Testing Scope

  • Ferrite count, hardness and dye penetrant examination
  • ASTM G48 Method A pitting test when the spec calls for it

LDX 2101 Orifice Flanges Third-Party Inspection

  • Released under SGS, BV, TUV, LRS or your own inspector
  • ISO 9001:2015 system, stage-wise hold points agreed upfront

WNR 1.4162 Spectacle Blind Flange Marking

  • Grade, size, class, heat number and standard stamped
  • Low-stress dies plus a colour band where you ask for it

Inox Duplex 2101 Socket Weld Flanges Export Packing

  • Fumigated plywood cases, VCI wrap and face protectors
  • Item-wise crate marking when one PO feeds several sites

V2101MN Lap Joint Flange Documentation

  • SANS reference data, KEBS PVoC and CoC support
  • CRN data packs for Canada and ECAS papers for the UAE
02 · Codes We Follow

EN 1.4162 Plate Flanges Manufacturing Standards

Every order answers to two codes, one governing chemistry and the other governing drilling, both confirmed by our Duplex 2101 Flanges supplier in India prior to dispatch.

ASME B16.5
ASME B16.47
ASTM A182
ASTM A240
ASTM A479
EN 10088-2 / -3
EN 1092-1
ASME B16.36
ASME B16.48
DIN 2527 / 2573
MSS SP-44
BS 4504
JIS B2220
Client-Specific

Buy SCC Corrosion Resistant UNS S32101 Weld Neck and Blind Flange Ready Ex-Stock in Mumbai Warehouse

03 · Quality

Lean Duplex Stainless Steel Puddle Flanges Testing & Certification

Phase balance and hardness are extra checks duplex requires beyond austenitic grades, and both appear on your crate certificate.

Ferrite Count
Chemical Analysis
PMI Testing
Tensile Test
Brinell Hardness
Charpy V-Notch Impact
Hydrostatic Test
Dye Penetrant Test
ASTM G48 Pitting Test
Dimensional Inspection
MTC EN 10204 3.1
Heat-Lot Traceability
04 · Industries

2101 Duplex Reducing Flange Applications

Plants dealing with chloride exposure, where strength and budget guide grade selection, form the main customer base for a Duplex 2101 Flanges manufacturer in India.

Water & Effluent Treatment
Storage Tanks & Vessels
Mining & Ore Processing
Sugar & Fertiliser Plants
Pulp & Paper Mills
Coastal & Marine Structures
Food & Beverage Lines
Bridge & Structural Work
05 · Product Range

Lean Duplex 2101 Flange Types

A Lean Duplex 2101 flanges supplier like us stocks forged blanks in six shapes, covering nearly every enquiry that comes through.

2101 Duplex Stainless Steel Slip On Flange

2101 Duplex Stainless Steel Slip On Flange

ASME B16.5 • Class 150–600
  • Slides over the pipe, welded inside and out
  • Forgiving on site fit-up, lowest cost per joint
UNS S32101 Weld Neck Flange

UNS S32101 Weld Neck Flange

ASME B16.5 • 1/2″–24″
  • Tapered hub carries pipeline bending load
  • Bored to your schedule before it leaves the works
Duplex LDX 2101 Blind Flange

Duplex LDX 2101 Blind Flange

ASME B16.5 • Class 150–2500
  • Closes off a line end or a vessel nozzle
  • Drilled and tapped for instrument tappings on request
Inox Duplex 2101 Socket Weld Flanges

Inox Duplex 2101 Socket Weld Flanges

ASME B16.5 • Up To 4″
  • Recessed bore with a single external fillet weld
  • First choice on small-bore dosing and sampling runs
LDX 2101 Duplex Stainless Steel Threaded Flange

LDX 2101 Duplex Stainless Steel Threaded Flange

NPT / BSP • Up To 6″
  • Screwed joint, so no hot work at the site
  • Suited to utility headers and non-cyclic duty
V2101MN Lap Joint Flange

V2101MN Lap Joint Flange

With Stub End • 1/2″–24″
  • Spins freely so bolt holes line up in seconds
  • Only the stub end has to be lean duplex

Duplex 2101 Flanges Manufacturer In Mumbai, Forging And Machining Under One Roof Since 2012

Share the drawing along with quantity required, and a works-price sheet arrives in your inbox by end of day.

Request Quote Now
06 · Composition

Duplex 2101 Chemical Composition

Heat by heat certification confirms UNS S32101 weight percent limits, where manganese takes over much of the nickel role found in austenitic grades.

Cr21.00–22.00Chromium
Mn4.00–6.00Manganese
Ni1.35–1.70Nickel
Mo0.10–0.80Molybdenum
Cu0.10–0.80Copper
N0.20–0.25Nitrogen
Si1.00 maxSilicon
C0.040 maxCarbon
P0.040 maxPhosphorus
S0.030 maxSulphur
FeBalanceIron
07 · Strength Data

2101 Duplex Stainless Steel Properties

The certificate travelling inside every crate records room temperature minimum values for solution annealed UNS S32101.

Tensile Strength650 MPa / 94 ksi min
Yield Strength (0.2%)450 MPa / 65 ksi min
Elongation (in 2″)30% min
Hardness290 HBW max
Density7.8 g/cm³ / 0.28 lb/in³
Delivery ConditionSolution Annealed
08 · Cross-Reference

WNR 1.4162 Spectacle Blind Flange Equivalent Grades

Several designations, one underlying chemistry, so no matter which name appears on your drawing, we forge the identical UNS S32101 material.

USAASTM / ASME (USA)

  • UNS S32101
  • ASTM A182 (Forgings)
  • ASTM A240 (Plate)
  • ASTM A479 (Bar)

GermanyDIN / EN (Germany)

  • Werkstoff 1.4162
  • X2CrMnNiN21-5-1
  • EN 10088-2 / EN 10088-3

UKBS (United Kingdom)

  • BS EN 10088 Grade 1.4162
  • No separate legacy BS number

JapanJIS (Japan)

  • No direct JIS grade designation
  • Supplied to JIS B2220 flange dimensions

SwedenTrade Names

  • LDX 2101®
  • Lean Duplex 2101
  • V2101MN

EuropeNeighbouring Lean Grades

  • Duplex 2202 • UNS S32202 • 1.4062
  • Duplex 2304 • UNS S32304 • 1.4362
Global Reach

Lean Duplex 2101 Slip On Flange Source Across Africa And The Gulf

Buyers across Southern Africa, East Africa and the GCC get shipments marked, crated and loaded ready for container transit.

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 · Material Choice

Duplex 2101 Vs 2205 Flanges

Yield strength lines up between the two grades, though the corrosion allowance does not, so confirm figures with our grade desk before finalising a substitution.

Duplex 2205 Flanges

  • Chromium: 22.0–23.0%
  • Nickel: 4.50–6.50%
  • Molybdenum: 3.00–3.50%
  • Typical PREN: Around 35
  • Minimum Yield: 450 MPa / 65 ksi
  • Elongation: 25% minimum
  • Alloy Cost: Higher, nickel and moly heavy

Duplex 2101 Flanges

  • Chromium: 21.0–22.0%
  • Nickel: 1.35–1.70%
  • Molybdenum: 0.10–0.80%
  • Typical PREN: Around 26
  • Minimum Yield: 450 MPa / 65 ksi
  • Elongation: 30% minimum
  • Alloy Cost: Lower, manganese replaces nickel
10 · Corrosion Duty

2101 Duplex Stainless Steel Slip On Flange Corrosion Resistance

Knowing exactly when lean duplex belongs on a specification, and the single scenario where it should be replaced.

Chloride Duty At A Glance

Survival on your line comes down to two factors. Pitting resistance equivalent number shows the chloride level the passive film can withstand before failing, while the duplex microstructure blocks chloride stress corrosion cracking, the quiet failure that shortens 304 and 316L header life in warm coastal sites. Lean duplex 2101 handles the cracking risk well, though pitting resistance only goes so far, which is why chloride content and operating temperature must always accompany the enquiry.

Typical PRENAround 26
MicrostructureFerrite Plus Austenite
Chloride SCCWell Clear Of 304 / 316L
Upper Service Limit300 °C
Comfortable InBrackish & Treated Water
Step Up To 2205 ForWarm Seawater Duty
  • Why the 300 °C ceiling matters: hold any duplex grade in the 300 °C to 500 °C window for long periods and the ferrite phase embrittles, so this is a cold-to-warm service material, never a furnace one.
  • PREN is not a pass mark: at roughly 26 the number sits above 316L but a long way under 2205, so crevices, stagnant legs and gasket faces still deserve a second look before you commit.
  • Send us the water analysis: chloride in ppm, working temperature and whether the line ever sits idle tell us more than the grade name on the drawing.
11 · Sizing

Duplex 2101 Long Neck Flanges Size, Class & Facing Range

Being an active Duplex 2101 flanges exporter, every class under ASME B16.5 gets machined here, with fast-moving bores always kept in stock.

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


Fastest Moving 2″ 3″ 4″ 6″ 8″ 12″

Size & Standard Coverage

ASME B16.51/2″ to 24″
ASME B16.47 Series A & B26″ to 60″
EN 1092-1DN 15 to DN 600
JIS B222010A to 600A
Weld Neck BoreSCH 5S to SCH 160 & XXS
Face Finish125–250 AARH serrated

Facings & Bolting Detail

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

V2101MN Lap Joint Flange Welding Procedure

Lean duplex welding is a heat balancing act, excess heat pushes ferrite too high while too little starves austenite, and four practices keep S32101 within range.

1

Prepare A Clean Bevel

Grind to bright metal with dedicated stainless tooling so no carbon steel dust rides into the joint.

2

Use Over-Alloyed Filler

ER2209 wire to AWS A5.9 or E2209 electrode to AWS A5.4 restores austenite in the weld metal.

3

Control Heat And Interpass

No preheat is needed, keep interpass temperature low, run stringer beads and shield the root with argon.

4

Check The Phase Balance

Ferrite count the completed weld, dye penetrant root and cap; post-weld heat treatment is not normally used.

13 · Commercial Case

Reasons Why Buyers Are Switching from 316L to Duplex LDX 2101 Blind Flange

This grade is most often chosen by buyers migrating away from 316L, and here is the math that typically drives that decision.

Nickel Exposure1.35–1.70% here against roughly 10–14% in 316L, so the LME nickel run moves your rate far less.
Molybdenum Load0.10–0.80% against 2.00–3.00% in 316L, taking most of the moly surcharge out of the quote.
Yield Strength450 MPa minimum against 170 MPa for 316L, which is the number that lets designers thin a section down.
Cracking RiskDuplex structure resists chloride stress corrosion cracking that quietly ends 316L service life.

Tensile minimum 650 MPa against 485 MPa for 316L
Elongation still 30% minimum, so forming stays practical
Manganese at 4.00–6.00% carries the austenite balance
Nitrogen at 0.20–0.25% adds strength and pitting resistance
Thermal expansion sits below austenitic grades, easing restraint
PREN near 26 edges past 316L, well short of 2205
Same ASME B16.5 drilling, so no gasket or bolt redesign
Ask us for a like-for-like swap sheet on your line list

Lean Duplex 2101 Slip On Flange Exporter In India To Durban Port, South Africa

Instead of holding for a complete container, part-load parcels travel on our fortnightly Southern Africa consolidation.

Request Export Quote
Global Reach

UNS S32101 Weld Neck and Blind Flange Supply Into North America & ASEAN

New supply lines are being established to reach buyers throughout Canada, Mexico, Southeast Asia and the Pacific rim.

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

UNS S32101 Weld Neck Flange Price Factors

The quotation figure depends on four variables, share your requirement and a dependable Duplex 2101 flanges supplier in India will price it same day.

Alloy SurchargeNickel sits at 1.35–1.70% and molybdenum at 0.10–0.80%, so the billet is far less exposed to the nickel exchange than 316L or 2205.
Size And Pressure ClassA Class 1500 hub swallows several times the forged weight of the same bore in Class 150.
Type And FacingOrifice sets, long neck bodies and RTJ grooves take machine hours a plain slip on never needs.
Testing LevelFerrite count is routine, but a G48 pitting test or a witnessed third-party release adds both cost and calendar days.
Regional Presence

Duplex 2101 Flanges Expanding Into Central Asian & Caucasus Markets

This developing industrial corridor is opening fresh opportunities for us as an emerging Duplex 2101 Flanges manufacturers.

Caucasus & Central Asia
ArmeniaArmenia
AzerbaijanAzerbaijan
15 · How It’s Made

LDX 2101 Orifice Flanges Manufacturing Process

Our in house lines handle forging, annealing and finishing, keeping every stage of production inside a single quality plan.

1

Billet & Upset

S32101 billet cut to weight and upset into the flange blank profile.

2

Closed-Die Forging

Hub and disc struck in die, giving continuous grain flow around the neck.

3

Solution Anneal & Quench

Annealed then water quenched fast, locking the ferrite and austenite balance.

4

CNC Face, Drill & Mark

Facing, bore and bolt holes cut, then ferrite count, PMI and heat-lot stamping.

16 · Turnaround

Inox Duplex 2101 Socket Weld Flanges Delivery Timeline

Orders leave our Mumbai works by one of four routes, and urgency at your site typically determines which route gets picked.

Stocked Sizes Move First

Held classes and bores clear our gate within 24–72 working hours of order confirmation

Container Sailing

Cheapest route for bulk lots, with roughly 10–30 days spent on the water

Emergency Airlift

When a unit is stopped, flange sets touch down at most hubs in 3–6 days

Named-Port Landing Date

Tell us the discharge port and a dated arrival plan comes back with the quote

Global Reach

UNS S32101 Weld Neck and Blind Flange Shipping to the Middle East

Desalination, water treatment and process buyers across the Gulf are supported through both ready-stock release and made to order dispatch.

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

LDX 2101 Duplex Stainless Steel Threaded Flange Supply References

Here are a few recent lean duplex shipments sent out to our customer base across Africa, the Gulf, ASEAN and North America.

8″ Class 150 Slip On Flanges - Raw Water Header

UNS S32101, RF serrated, ferrite count and PMI reports.

Municipal Water Utility Contractor, South Africa

DURBAN, SOUTH AFRICA

12″ Class 300 Weld Neck Flanges - Desalination Intake Line

Bored to SCH 20S, G48 pitting test witnessed by TPI.

Water Treatment EPC Contractor, UAE

JEBEL ALI, UAE

4″ Class 150 Blind Flanges - Sugar Mill Juice Circuit

Supplied with matched duplex studs, nuts and gaskets.

Sugar Processing Plant, Kenya

MOMBASA, KENYA

6″ Class 300 Orifice Flange Sets - Tailings Metering Skid

Tapped pressure taps, jack screws, CRN data pack included.

Potash Mining Contractor, Canada

SASKATCHEWAN, CANADA

2″ Class 150 Socket Weld Flanges - Chemical Dosing Skid

Small-bore package, full dye penetrant and MTC 3.1.

Skid Fabrication Workshop, Turkey

IZMIR, TURKEY

10″ Class 150 Lap Joint Flanges - Effluent Recirculation Loop

Shipped with matching stub ends in seaworthy crating.

Pulp & Paper Mill, 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

EN 1.4162 Flange Supplier In Ahmedabad With Ferrite Count And EN 10204 3.1 On File

The test record your inspector expects at the receiving gate travels inside every crate we send.

Get Supplier Quote
18 · FAQs

Duplex 2101 Flanges FAQs

Straight answers to the questions that come up before a purchase order is released, from a Duplex 2101 flanges manufacturer in Mumbai.

Where does Lean Duplex 2101 perform best on a project?

Structural work, tanks, and mildly corrosive piping where price matters more than top tier chloride resistance.

How strong is a 2101 Duplex Stainless Steel Slip On Flange compared to 304?

Roughly double the yield strength of 304, letting you use thinner sections for the same load.

What certification comes with a Duplex LDX 2101 Blind Flange order?

Mill test certificate under EN 10204 3.1, covering chemical analysis, mechanical testing and heat number traceability.

Is a UNS S32101 Weld Neck Flange suitable for welding onto carbon steel pipe?

Yes, with a compatible transition filler wire, though matching duplex pipe gives better long term results.

What sizes do Inox Duplex 2101 Socket Weld Flanges come in?

Half inch through four inch is standard stock, larger bores available as a made to order run.

Why choose an LDX 2101 Duplex Stainless Steel Threaded Flange over a welded type?

No welding needed on site, faster installation, and easier removal for maintenance or inspection later.

Duplex 2101 Flanges - Forged & Solution Annealed By Mortec
Lean duplex chemistry holds 450 MPa yield on modest nickel
RF, RTJ and flat-face blanks held across Class 150 to 2500
Every S32101 flange ferrite-counted and PMI-checked before crating
Custom bores, spectacle blinds and port-marked export crates

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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