Nicorex Alloys is an ISO 9001 and ISO 14001 certified stockist and supplier of pipes, tubes, and pipe fittings based in Mumbai, India. We stock seamless and welded pipes across nickel alloy, duplex, super duplex, and speciality steel grades, with matching buttweld, socket weld, and threaded fittings.
Our inventory covers material grades like Hastelloy C276/C22, Inconel 600/625, Incoloy 800/800H/800HT/825, Monel 400, Nickel 200/201, Duplex S31803/S32205, Super Duplex S32750/S32760, Alloy 20, and 904L. Pipe sizes range from NPS ½” to 24” in seamless and up to 36” in welded, in schedules 5S through XXS. Tubes cover 6 mm to 114.3 mm OD. Fittings range from ½” to 24”, manufactured to ASTM B366 (nickel alloys) and ASTM A815 (duplex), with dimensions to ASME B16.9 and ASME B16.11.
Every shipment carries MTC 3.1 per EN 10204 with full chemistry, mechanical properties, and heat number traceability. Third-party inspection (TUV, Bureau Veritas, DNV, SGS) is arranged on request.
Pipe and Pipe Fittings Material Grades
Nicorex Alloys stocks sheets and plates across nickel alloy, duplex, and speciality steel grades.
Pipes & Pipe Fittings Specification
| Parameter | Details |
|---|---|
| Type | Seamless, ERW (Electric Resistance Welded), EFW (Electric Fusion Welded) |
| Standard | ASTM, ASME, EN 10216/10217, DIN, JIS |
| Pipe Size (NPS) | ½” to 24” seamless; up to 36” welded |
| Tube OD | 6 mm to 114.3 mm |
| Schedule | 5S, 10S, 20, 40S, 80S, 120, 160, XXS |
| Length | 6 m random, fixed cut-to-length, double random (DRL) |
| End Finish | Plain End (PE), Bevelled End (BE), Threaded End (TE) |
| Surface | Bright Annealed (BA), Pickled, Mill Finish |
| Testing | Hydrostatic, ECT, UT, PMI, Flattening, Flaring |
| Parameter | Details |
|---|---|
| Product | Factory-Made Wrought Buttweld Pipe Fittings |
| Material Standards | • ASTM B366 / ASME SB366 (Nickel & Nickel Alloys) • ASTM A815 / ASME SA815 (Duplex & Super Duplex Stainless Steel) |
| Dimensional Standards | • ASME B16.9 (Factory-Made Wrought Buttweld Fittings) • ASME B16.28 (Short Radius Elbows & Returns) |
| Size Range | NPS ½” (DN 15) to NPS 48″ (DN 1200) |
| Manufacturing Type | • Seamless: ½” to 10″ typical (Hot forming from seamless pipe/forging) • Welded: 12″ to 48″ (Formed from welded pipe ERW/EFW) |
| Wall Thickness / Schedule | Sch 5S, 10S, 20, 40S, 80S, 120, 160, XXS (Must match connecting pipe schedule) |
| Types of Fittings | • 90° Elbow (LR & SR), 45° Elbow, 180° Return Bend • Equal Tee, Reducing Tee, Cross • Concentric Reducer, Eccentric Reducer • End Cap, Stub End (Long & Short Pattern) |
| End Connection | Butt Weld — bevelled end per ASME B16.25 (37.5° bevel angle, 1.6mm root face standard) |
Need pipes, tubes, or fittings in nickel alloy or duplex grades? Share your NPS, schedule, grade, and quantity with Nicorex Alloys for single-source procurement. Call, WhatsApp, or email for a quotation.
Get Pipe and Pipe Fittings at Competitive Prices
ASTM/ASME Standard for Pipes
| Grade | Seamless Pipe | Welded Pipe | ASME Equivalent |
|---|---|---|---|
| Hastelloy C276 | B622 | B619 | SB622 / SB619 |
| Hastelloy C22 | B622 | B619 | SB622 / SB619 |
| Inconel 600 | B167 | — | SB167 |
| Inconel 625 | B444 | B705 | SB444 / SB705 |
| Incoloy 800/800H/800HT | B407 | B514 | SB407 / SB514 |
| Incoloy 825 | B423 | — | SB423 |
| Monel 400 | B165 | — | SB165 |
| Nickel 200/201 | B161 | — | SB161 |
| Duplex/Super Duplex | A790 | A790 | SA790 |
| Alloy 20 | B729 | B729 | SB729 |
| 904L | B677 | B673 | SB677 / SB673 |
ASTM Tubing Standard Specifications
| Grade | Seamless Tube | Welded Tube | Application |
|---|---|---|---|
| Inconel 600 | B163 | — | Condenser, HX |
| Inconel 625 | B444 | B704 | HX, instrumentation |
| Incoloy 800/800H | B407 | B515 | HX, furnace |
| Incoloy 825 | B423 | B515 | HX, acid service |
| Monel 400 | B165 | — | Condenser, seawater |
| Nickel 200/201 | B163 | — | Caustic, condenser |
| Duplex/Super Duplex | A789 | A789 | HX, subsea |
| Alloy 20 | — | B468 | Acid service HX |
| 904L | — | B674 | HX, acid |
Pipe Schedule and Wall Thickness Chart
| NPS | OD (mm) | Sch 5S (mm) | Sch 10S (mm) | Sch 40S (mm) | Sch 80S (mm) | Sch 160 (mm) | XXS (mm) |
|---|---|---|---|---|---|---|---|
| ½” | 21.3 | 1.65 | 2.11 | 2.77 | 3.73 | 4.78 | 7.47 |
| ¾” | 26.7 | 1.65 | 2.11 | 2.87 | 3.91 | 5.56 | 7.82 |
| 1″ | 33.4 | 1.65 | 2.77 | 3.38 | 4.55 | 6.35 | 9.09 |
| 1½” | 48.3 | 1.65 | 2.77 | 3.68 | 5.08 | 7.14 | 10.15 |
| 2″ | 60.3 | 1.65 | 2.77 | 3.91 | 5.54 | 8.74 | 11.07 |
| 3″ | 88.9 | 1.65 | 3.05 | 5.49 | 7.62 | 11.13 | 15.24 |
| 4″ | 114.3 | 1.65 | 3.05 | 6.02 | 8.56 | 13.49 | 17.12 |
| 6″ | 168.3 | 1.65 | 3.40 | 7.11 | 10.97 | 18.26 | 21.95 |
| 8″ | 219.1 | 1.65 | 3.76 | 8.18 | 12.70 | 20.62 | 22.23 |
| 10″ | 273.1 | 1.65 | 4.19 | 9.27 | 12.70 | 21.44 | 25.40 |
| 12″ | 323.9 | – | 4.57 | – | – | – | – |
Schedule Application Guide
| Schedule | Typical Use |
|---|---|
| 5S | Low-pressure utility, instrument air, and drains |
| 10S | Low-medium pressure, most common for stainless/Ni alloy process piping |
| 40S | Standard pressure, general process service |
| 80S | High pressure, thicker wall for threading capability |
| 160 | Very high pressure, critical service |
| XXS | Extreme pressure, restricted bore |
Types of Fittings
| Connection Type | Standard | Size Range | Pressure Class | Use |
|---|---|---|---|---|
| Buttweld (BW) | ASME B16.9 | ½” to 24” | Per pipe schedule | Process piping (>2”) |
| Socket Weld (SW) | ASME B16.11 | ⅛” to 4” | 3000#, 6000#, 9000# | Small bore (≤2”) |
| Threaded (THD) | ASME B16.11 | ⅛” to 4” | 2000#, 3000#, 6000# | Low pressure, non-critical |
90° Elbow
The 90° elbow changes pipe direction by a full right angle. Long Radius (LR) with a centreline radius of 1.5× NPS is the default. Short Radius (SR) at 1× NPS fits tight layouts.
45° Elbow
A 45° elbow provides a gradual direction change with less flow resistance. Two can replace one 90° elbow where space allows.
Reducing Tee
Reducing tees have a smaller branch opening, designated Run × Run × Branch (e.g., 4” × 4” × 2”). They replace a tee-plus-reducer on the branch.
Concentric Reducer
This fitting tapers from a larger NPS to a smaller one while keeping the centreline aligned. It is standard on vertical pipe runs.
Eccentric Reducer
Eccentric reducers maintain one flat side: Flat-on-Bottom (FOB) prevents liquid accumulation in horizontal runs, while Flat-on-Top (FOT) avoids air pockets at pump suction.
End Cap
An end cap closes a pipe run with a dished or flat profile for dead ends, pressure testing, and future expansion.
Stub End
The stub end is butt-welded to pipe and paired with a lap joint flange for bolt hole alignment. Long pattern per ASME B16.9; short per MSS SP-43.
180° Return Bend
Return bends reverse flow by 180° in a single U-shaped fitting, used in heat exchanger headers and coil systems.
| Fitting | BW | SW | THD | Main Use |
|---|---|---|---|---|
| 90° Elbow (LR) | Yes | Yes | Yes | Direction change |
| 45° Elbow | Yes | Yes | Yes | Gradual direction change |
| Equal Tee | Yes | Yes | Yes | Branch off the same size |
| Reducing Tee | Yes | Yes | Yes | Branch off a smaller size |
| Concentric Reducer | Yes | — | — | Size change (vertical) |
| Eccentric Reducer | Yes | — | — | Size change (horizontal) |
| End Cap | Yes | — | Yes | Pipe termination |
| Stub End | Yes | — | — | Lap joint flange connection |
| Coupling | — | Yes | Yes | Join two pipes |
| Union | — | Yes | Yes | Disconnect-friendly joint |
| Half Coupling | — | Yes | Yes | Branch connection |
| Pipe Nipple | — | — | Yes | Short threaded connector |
| Bushing | — | — | Yes | Size reduction (threaded) |
| 180° Return Bend | Yes | — | — | U-loop, HX headers |
Matching fitting grade to pipe grade is critical; mixed grades risk galvanic corrosion.
Types of Pipes
Seamless Pipe
Seamless pipe is produced by piercing a solid billet with no weld seam. Most often for sour service under NACE MR0175 and cyclic fatigue applications.
Welded Pipe (ERW)
ERW pipe is formed from strip coil and seam-welded without filler metal. Every seam is 100% ECT or UT tested.
EFW Pipe
EFW pipe uses filler metal during joining. It is the standard method above NPS 16” where seamless production isn't feasible.
Industrial Applications of Pipes & Fittings
- Chemical & Petrochemical: Acid transfer lines, reactor feed piping, and scrubber circuits are the primary applications.
- Oil & Gas (Offshore, Subsea, Sour Service): Inconel 625 is the standard for subsea flowlines. Super Duplex S32750 handles seawater, and Duplex 2205 covers sour gas gathering.
- Power Generation: Superheater, reheater, and condenser tubing, furnace service, and seawater condensers.
- Pulp & Paper: ClO₂ bleach plant piping runs in harsh chloride‑acid conditions.
- Pharmaceutical & Food Processing: CIP piping and WFI loops require electropolished tubes with Ra ≤ 0.4 µm surface roughness for cleanroom service.
- Desalination & Water Treatment: Seawater intake, brine reject, and RO high-pressure piping.
- Marine & Shipbuilding: Seawater cooling, bilge piping, fire main, and exhaust systems are common shipboard applications.
How to Order Pipes and Fittings from Nicorex Alloys
- Product Form: Seamless / Welded Pipe / Fittings (Elbow, Tee, Reducer, End Cap)
- Size: OD x WT or NPS x Schedule
- End Type: PE / BE / BW / SW / Threaded (NPT / BSP)
- Material Grade: Specify alloy, UNS number, and W.Nr. / EN designation
- Quantity: Number of pieces or total weight in kg / MT
- Standard: Specify applicable ASTM / ASME / DIN / EN / JIS standard
- Documentation: MTC 3.1/3.2, PMI Report, Test Certificates, TPI Certificate
- Packaging: VCI wrap, ISPM 15 compliant export crating with full labelling
- Delivery: Domestic