Forged Duplex & Super Duplex Threaded Fittings Trusted On Critical Pressure Lines
Dual-Phase Strength
Austenite-ferrite structure resists cracking under high pressure.
Third-Party Inspection Ready
SGS, BV & TUV witnessed testing arranged on request.
Full Heat Traceability
Every forged batch linked to its own cast and test record.
ANSI B16.11 Certified Forging
Dimensions checked against MSS SP-79 on every lot.
Ready NB Stock
Common sizes and classes packed without production delay.
Duplex Steel Threaded Fittings Snapshot
- 1Product Range: Elbow, Tee, Coupling, Union, Cross, Bushing, Cap & Hex Plug
- 2Size Range: 1/4" NB To 4" NB, Custom On Drawing
- 3Governing Standard: ASTM A182 & ASME SA182, ANSI B16.11
- 4Form: Forged, Screwed & Hot-Formed Fittings
- 5Common Grades: Duplex 2205 & Super Duplex 2507
- 6Service Use: Offshore, Desalination, Chemical & Marine Lines
Or call our Mumbai office: +91 22 6743 7134 • Every lot dispatched with heat-wise MTC as per EN 10204 3.1
A trusted Supplier of Duplex Steel Threaded Fittings we keeps offshore projects moving on schedule. We forge Elbows, Tees, Crosses and Union joints in 2205 and 2507 grade. Our unit works as a certified Duplex Steel Threaded Fittings Manufacturer In India for turnkey piping packages. Pitting resistance and high yield strength make this alloy suited to sour service. As a dependable Duplex Threaded Elbows Supplier, every batch ships fully documented.
Mumbai · Duplex Steel Threaded Forged Fittings Exporter
Duplex Steel Threaded Fittings – Built for Tough Environments.
Ganpat Industrial forges and certifies Duplex Threaded Elbows, Couplings, Tees, Crosses, Bushings, Hex Plugs & Caps for fabricators who cannot risk a rejected screwed joint on offshore, desalination or chemical piping across India, the GCC and Africa. Every ANSI B16.11 Duplex Threaded Fitting we dispatch carries heat-wise mill certification.
- ✓ISO 9001:2015
- ✓PED 2014/68/EU Compliant
- ✓ASTM A182 & ASME SA182 Certified
- ✓Mill Test Certificate 3.1
- ✓Third-Party Inspection Approved
Corrosion-Resistant Duplex Threaded Elbows Manufacturer in India with Third-Party Inspection (TPI)
ASTM A182 Duplex Steel Threaded Fittings Specification
Duplex Steel Screwed Fittings Material
- UNS S31803 / S32205 / S32750
- W. Nr. 1.4462 / 1.4410
- Duplex 2205 & Super Duplex 2507
- ASTM A182 Grade F51 / F53 / F55
Duplex Steel Threaded Pipe Nipple Size
- NB: 1/4" – 4"
- Class: 2000# / 3000# / 6000#
- Thread: NPT / BSPT / BSPP
- Custom Sizes On Drawing
ANSI B16.11 Duplex Threaded Fittings Testing
- PMI Testing
- Liquid Penetrant Test (PT)
- Ferrite Content Check
- Third-Party Inspection
Duplex Threaded Elbows Finish
- Black / Natural Forged
- Machine Finish
- Bright / Polished Finish
- Shot Blasted Finish
Duplex Steel Threaded Bushing Documentation
- Mill Test Certificate 3.1
- NABL Lab Report
- Packing List
- Certificate Of Origin
Duplex Threaded Cap Origin
- Indian Origin
- European Origin
- Japanese Origin
- Heat-Number Traceable
Duplex Steel Threaded Pipe Nipple Size Chart
Buy Duplex Steel High Pressure Threaded Fittings in 1/4" to 4" NB with Class 2000/3000/6000.
| Fitting Type | NB Size Range | Thread Standard | Pressure Class |
|---|---|---|---|
| Elbow / Tee / Cross | 1/4" – 4" | NPT / BSPT / BSPP | 2000# / 3000# / 6000# |
| Coupling / Union | 1/4" – 4" | NPT / BSPT | 2000# / 3000# / 6000# |
| Hex Plug / Cap | 1/4" – 4" | NPT / BSPT | 3000# / 6000# |
| Bushing / Nipple | 1/4" – 4" | NPT | 2000# / 3000# / 6000# |
ANSI B16.11 Duplex Threaded Elbow Weight Chart
| NB Size | Class 2000# | Class 3000# | Class 6000# |
|---|---|---|---|
| 1/4″ | 0.05 | 0.08 | 0.11 |
| 3/8″ | 0.08 | 0.12 | 0.16 |
| 1/2″ | 0.11 | 0.17 | 0.23 |
| 3/4″ | 0.18 | 0.27 | 0.35 |
| 1″ | 0.28 | 0.40 | 0.52 |
| 1-1/4″ | 0.42 | 0.58 | 0.74 |
| 1-1/2″ | 0.52 | 0.71 | 0.91 |
| 2″ | 0.78 | 1.05 | 1.35 |
| 2-1/2″ | 1.25 | 1.65 | 2.05 |
| 3″ | 1.85 | 2.40 | 3.05 |
| 4″ | 3.35 | 4.25 | 5.35 |
Benefits Of Duplex Steel High Pressure Threaded Fittings
Resists Chloride Pitting & Crevice Attack
Near Double The Yield Of Standard 316
Quick Screwed Install, No Welding Needed
Zero-Leak Joint On High-Pressure Lines
Lower Life-Cycle Cost Than Super Alloys
Removable Joint For Future Maintenance Work
Good Fatigue Resistance Under Vibration
Proven Performance In Marine & Offshore Duty
Dimensional Tolerance On Duplex Threaded Elbows
| Dimension Checked | Tolerance Allowed |
|---|---|
| Center To End (Up To 2" NB) | ±1.5 mm |
| Center To End (2.5" – 4" NB) | ±2.4 mm |
| Thread Length (NPT/BSPT) | ±1 Full Thread |
| Body Wall Thickness | -0% / +12.5% |
| Out Of Roundness | 1% Of OD, Max |
Need A Third-Party Witnessed Test Certificate?We coordinate SGS, Bureau Veritas or TUV inspection on request.
Testing Methods For Duplex Steel Screwed Tee
Every forged batch of Duplex Threaded Elbows passes strict PMI, mechanical and ferrite checks.
Chemical Analysis – Spectro Test
Spectrometer reading confirms Cr-Ni-Mo-N content against grade chemistry
Every Heat
Tensile & Yield Test
Confirms tensile and yield strength meet ASTM A182 minimums
Every Batch
Ferrite Content Test
Confirms 35-65% ferrite balance for correct duplex structure
Every Batch
Intergranular Corrosion Test
ASTM A923 practice checks for detrimental intermetallic phases
On Request
Positive Material Identification (PMI)
Handheld alloy analyzer confirms grade before packing
Every Batch
Buy Bright & Black Finish ANSI B16.11 Duplex Screwed Fittings in 1/4" to 4" NB as per MSS SP-79 for Offshore Applications
Surface Finish On Duplex Steel Threaded Cross
Black / Natural Forged
As-forged surface for standard duty fittings
Machine Finish
Precision-turned thread & bore for a tight fit-up
Bright Polished
High-shine surface for hygienic & visible parts
Shot Blasted
Uniform matte texture ahead of final inspection
Application Industries Of Duplex Steel Threaded Couplings
Choose a leading Duplex Steel Threaded Fittings Supplier In India for standard and custom drawing fittings.
Offshore Oil & Gas Platforms
Sea Water Desalination Plants
Chemical & Fertilizer Process Lines
Marine & Ship Building Piping
Pulp, Paper & Bleaching Units
Heat Exchanger & Cooling Piping
Sour Gas & Sulphuric Acid Lines
Instrumentation & Utility Skids
Most In-Demand Duplex Steel Screwed Fittings Types
We remain a leading Duplex Steel Threaded Fittings Exporter In India for standard and drawing-based parts.
Duplex Steel Threaded Cross
Cross
Duplex Steel Threaded Bushing
Bushing
Duplex Steel Screwed Union
Union
Duplex Threaded Elbows
Elbow
Duplex Steel Threaded Hex Plug
Hex Plug
Duplex Threaded Cap
Cap
Duplex Steel Threaded Pipe Nipple
Nipple
Duplex Steel Screwed Tee
Tee
Duplex Steel Threaded Couplings
Coupling
Weekly Delivery Of Duplex Steel Threaded Fittings In Below Countries
We remain a dependable Duplex Steel Threaded Fittings Supplier In India for fast-track export orders.
| Export To | Continent | Shipping Time | Port |
|---|---|---|---|
UAE |
Asia | 5 Days | Khalifa |
Italy |
Europe | 30 Days | Messina |
Germany |
Europe | 20 Days | Wilhelmshaven |
Documentation Supplied With Duplex Steel Threaded Bushing
Mill Test Certificate
EN 10204 3.1
Heat-wise chemistry & mechanical report
Inspection Report
NABL / TPI
Dimensional and visual inspection record
Trade Papers
CoO & Packing List
Certificate of origin with export packing list
Third-Party
SGS / BV / TUV
Witnessed inspection arranged on request
Need A Grade-Matched Chemistry Report?Share application media & temperature – we confirm the right alloy.
ASME SA182 Duplex Steel Threaded Fittings Chemical Composition
Reference chemistry for Duplex Steel Threaded Fittings stock as per ASTM A182 / ASME SA182.
| Grade (UNS) | C | Cr | Ni | Mo | N | Mn | P / S |
|---|---|---|---|---|---|---|---|
| 2205 (S31803) | 0.030 max | 21.0 – 23.0 | 4.5 – 6.5 | 2.5 – 3.5 | 0.08 – 0.20 | 2.00 max | 0.030 / 0.020 max |
| 2205 (S32205) | 0.030 max | 22.0 – 23.0 | 4.5 – 6.5 | 3.0 – 3.5 | 0.14 – 0.20 | 2.00 max | 0.030 / 0.020 max |
| Super Duplex 2507 (S32750) | 0.030 max | 24.0 – 26.0 | 6.0 – 8.0 | 3.0 – 5.0 | 0.24 – 0.32 | 1.20 max | 0.035 / 0.020 max |
| Zeron 100 (S32760) | 0.030 max | 24.0 – 26.0 | 6.0 – 8.0 | 3.0 – 4.0 | 0.20 – 0.30 | 1.00 max | 0.030 / 0.010 max |
All values in % by weight, as per ASTM A182 / A479 grade limits.
ASTM A182 Duplex Threaded Fittings Mechanical Properties
Grade F51 (2205)
620 MPa
450 MPa Yield, 25% Elong. Min
Grade F53 (2507)
795 MPa
550 MPa Yield, 15% Elong. Min
Grade F55 (Zeron 100)
750 MPa
550 MPa Yield, 25% Elong. Min
Hardness Limit
293-310 HB
Grade Dependent, Max
Duplex Steel Threaded Hex Plug Equivalent Standards
| Common Name | UNS | WERKSTOFF NR. | ASTM Grade |
|---|---|---|---|
| Duplex 2205 | S31803 | 1.4462 | F51 |
| Duplex 2205 (N Enhanced) | S32205 | 1.4462 | F60 |
| Super Duplex 2507 | S32750 | 1.4410 | F53 |
| Zeron 100 | S32760 | 1.4501 | F55 |
Welding Methods Around Duplex Threaded Cap Joints
GTAW / TIG Root
Preferred for socket & seal welds around threads
Matching Filler Metal
ER2209 / ER2594 filler keeps phase balance correct
Low Heat Input
Controlled interpass temperature avoids intermetallic phases
Post-Weld Ferrite Check
Verifies weld zone still meets ferrite balance target
Machining Process For Duplex Steel Threaded Couplings
Bar / Forged Blank Turning
Low cutting speed prevents work-hardening of the surface
Thread Cutting
NPT / BSPT / BSPP form cut to gauge on CNC lathes
Bore & Face Finishing
Sharp tooling with coolant flow controls heat build-up
Dimensional Inspection
Thread gauge & caliper check against ANSI B16.11
Duplex Steel Threaded Cross Vs Duplex Steel Screwed Union
Duplex Steel Threaded Cross
- Four openings for double branch connections
- Fixed joint, no in-line disassembly
- Used where two branch lines meet
- Common on header & manifold piping
Duplex Steel Screwed Union
- Three-piece joint for quick disconnection
- Ideal where periodic maintenance is expected
- Seals via ground joint or O-ring face
- Preferred on pump & valve tie-ins
Monthly Delivery Of Duplex Steel Threaded Fittings In Below Countries
Every lot leaving our unit reflects our standing as a certified Duplex Steel Threaded Fittings Manufacturer In India.
| Export To | Continent | Shipping Time | Port |
|---|---|---|---|
USA |
North America | 40-60 Days | Port of New York |
Spain |
Europe | 30 Days | Alcúdia |
2205 Vs 2507 Duplex Steel Threaded Fittings Selection
Duplex 2205 (F51 / F60)
- Good balance of cost, strength & corrosion resistance
- Suits process, chemical & utility piping
- PREN value near 35
- Widely stocked, shorter lead time
Super Duplex 2507 (F53)
- Higher chromium, molybdenum & nitrogen content
- Fits sour service & deep-water offshore lines
- PREN value above 40
- Premium choice for aggressive chloride media
Duplex Steel Screwed Fittings HSN Code & GST Rate
HSN Code
7307
Applies to stainless & duplex steel threaded fittings
GST Rate
18%
Standard rate on domestic duplex fitting supply
Export Status
Zero-Rated
LUT-based export shipments carry no GST charge
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Ask Our Team
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Duplex Steel Threaded Hex Plug Price Factors
Get A Line-Item Quote In 24 HoursSend grade, size, class and quantity for a firm price.
Frequently Asked Questions
What is the price of Duplex Steel Threaded Fittings?
Price depends on grade, NB size, class rating and fitting type; share drawing for quote.
What size range is available in Duplex Threaded Elbows?
We supply Duplex Threaded Elbows from 1/4 inch to 4 inch NB size range.
Which HSN code applies to Duplex Steel Screwed Fittings in India?
Duplex fittings fall under HSN code 7307, taxed at 18 percent GST rate.
Is there a minimum order quantity for Duplex Steel Screwed Union?
No fixed MOQ; we supply single pieces and full project quantities on request.
Can Duplex Steel Threaded Hex Plug be supplied in Super Duplex grade?
Yes, Hex Plugs are available in 2205 and 2507 Super Duplex on request.
We Collaborate With Traders in the Following Countries
| Continent | Countries |
|---|---|
| Middle East | Saudi Arabia, UAE, Oman |
| Africa | Nigeria, South Africa, Algeria, Kenya, Angola, Tanzania, Ethiopia, Zambia, Ghana, Gabon, Morocco, Mozambique, Egypt, Tunisia |
| North America | USA |
| Oceania | New South Wales, Australia |
6 Reasons to choose Ganpat Industrial Corporation
- Distributor of Heat Exchanger parts and Alloys for High Temperature applications.
- Stockholder and importer of Ferrous and non ferrous metals.
- Wide stock of prime quality austenitic and Ferritic Stainless Steel for Extreme pressure environment.
- Marine grade steel at lowest price in Mumbai.
- Compare Price per KG in India and China.
- Offer Resale price to local suppliers, traders and wholesalers in UAE, Saudi Arabia, Egypt, and USA