Stainless Steel Pipe Fittings Manufacturer & Exporter India
We are one of the leading manufacturers, suppliers and exporters of Stainless Steel Pipe Fittings from India. We have been supplying Stainless Steel pipe fittings and threaded fittings to the world market for 3 decades. Our Stainless Steel pipe fittings are engineered for the most demanding fluid handling, process piping, and structural applications where resistance to corrosion, high temperatures, and aggressive chemicals is non-negotiable. Manufactured from premium grades including SS 304, SS 316, SS 316L, SS 317L, and Duplex Stainless Steel, our fittings are precision-machined, pressure-tested, and supplied with full material traceability. We are ISO 9001:2015, ISO 14001:2015, and ISO 45001:2018 certified, and our Stainless Steel fittings are exported globally — to the USA, Germany, UK, Australia, Canada, Singapore, and the Middle East — serving the oil and gas, chemical, food processing, pharmaceutical, and marine industries. Our in-house CNC turning centres, thread-rolling machines, and spectrometer-equipped quality lab ensure that every fitting meets ASTM, ASME, BS, DIN, and IS dimensional and material standards.
From standard NPT and BSP threaded Stainless Steel elbows, tees, and couplings to custom-engineered manifolds, nipples, and pipe reducers, our production range covers ⅛ inch to 4 inches across all common thread forms. We offer customisation in alloy grade, thread type, surface finish, and marking, and we accommodate orders ranging from small prototype batches to full container loads. Our typical turnaround time of 4–6 weeks, transparent communication, and branded packaging options make us a preferred partner for distributors, OEM buyers, and engineering contractors worldwide.
Sub-categories: Stainless Steel threaded fittings, SS pipe nipples, SS elbows, SS tee fittings, SS couplings, SS hex bushings, SS pipe reducers, SS union fittings, SS pipe plugs, SS pipe caps
Material Grades — Stainless Steel Pipe Fittings
Stainless Steel is an iron-chromium alloy with a minimum chromium content of 10.5%, which creates a passive oxide layer that provides corrosion resistance. The addition of Nickel, Molybdenum, Titanium, and other elements gives rise to the various grades used in pipe fittings.
| Standard | Grade | Composition (approx.) | Key Properties & Applications |
|---|---|---|---|
| ASTM (USA) | AISI 304 / UNS S30400 | 18% Cr, 8% Ni | General purpose, food and dairy, mild corrosion |
| ASTM (USA) | AISI 304L / UNS S30403 | 18% Cr, 8–10% Ni, low C | Weldable grade, sensitisation resistant |
| ASTM (USA) | AISI 316 / UNS S31600 | 16% Cr, 10% Ni, 2% Mo | Marine, chemical, chloride environments |
| ASTM (USA) | AISI 316L / UNS S31603 | 16% Cr, 10% Ni, 2% Mo, low C | Weldable 316, pharmaceutical, nuclear |
| ASTM (USA) | AISI 317L | 18–20% Cr, 11–15% Ni, 3–4% Mo | High Mo content, flue gas desulphurisation |
| ASTM (USA) | 2205 Duplex / UNS S32205 | 22% Cr, 5% Ni, 3% Mo, N | Duplex, high strength + corrosion resistance |
| BS (UK) | BS 970 Grade 316S31 | Similar to AISI 316 | UK standard, marine and chemical service |
| DIN (Germany) | DIN 1.4301 | Equivalent to AISI 304 | German standard, food, architecture |
| DIN (Germany) | DIN 1.4401 | Equivalent to AISI 316 | Chemical, marine, pharmaceutical |
| DIN (Germany) | DIN 1.4404 | Equivalent to AISI 316L | Low carbon 316, weld-sensitive uses |
| IS (India) | IS 6603 Grade 04Cr18Ni10 | SS 304 equivalent | Indian standard for Stainless Steel bar |
| JIS (Japan) | JIS G 4303 SUS304 | SS 304 equivalent | Japanese Stainless Steel bar standard |
| JIS (Japan) | JIS G 4303 SUS316L | SS 316L equivalent | Low carbon, Japan pharmaceutical use |
| GB (China) | GB/T 1220 0Cr18Ni9 | SS 304 equivalent | Chinese Stainless Steel standard |
| EN (Europe) | EN 10088-3 1.4571 | 16Cr-10Ni-2Mo-Ti | Titanium stabilised 316 for welded structures |
Mechanical Properties — Common Stainless Steel Grades
| Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HB) | Density (g/cm³) |
|---|---|---|---|---|---|
| SS 304 | 515 min. | 205 min. | 40 | ≤187 | 7.93 |
| SS 304L | 485 min. | 170 min. | 40 | ≤187 | 7.93 |
| SS 316 | 515 min. | 205 min. | 40 | ≤217 | 7.98 |
| SS 316L | 485 min. | 170 min. | 40 | ≤217 | 7.98 |
| 2205 Duplex | 620 min. | 450 min. | 25 | ≤293 | 7.80 |
Manufacturing Processes
Stainless Steel pipe fittings are produced through a combination of hot forging, cold forging, bar stock CNC machining, and investment casting depending on the fitting type, size, alloy grade, and production volume. For standard threaded fittings in sizes up to 2 inches — such as elbows, tees, couplings, and nipples — CNC machining from Stainless Steel bar stock provides excellent dimensional accuracy, surface finish, and pressure integrity. Larger fittings, complex geometries, and high-volume items may be produced via precision investment casting (lost wax process) followed by machining of thread forms and seating faces.
Key manufacturing steps include: raw material inspection with OES spectrometer to verify alloy grade and composition, bar turning on CNC lathes (thread cutting, O.D. and face machining), hot or cold forging for small elbows and tee bodies, thread rolling or cutting for BSP/NPT/metric thread forms, surface passivation (pickling and passivation per ASTM A380) to remove iron contamination and restore the passive layer, electro-polishing for food, pharmaceutical, and high-purity fluid service, hydrostatic pressure testing, and full dimensional inspection with CMM verification.
Machinery Used
| Machine Type | Purpose |
|---|---|
| CNC Turning Centres (multi-axis) | Precision turning, thread cutting, facing |
| CNC Milling / Machining Centres | Hex faces, port bores, special features |
| Cold Heading / Cold Forging Machines | Net-shape forming of small fittings |
| Thread Rolling Machines | BSP, NPT, metric threads — rolled for strength |
| Passivation / Pickling Lines | Post-machining passivation per ASTM A380 |
| Electro-polishing Tanks | High-purity surface finish for pharma use |
| OES Spectrometer | 100% alloy grade verification |
| Hydrostatic Test Benches | Pressure testing to 1.5× rated pressure |
| CMM (Coordinate Measuring Machine) | Dimensional verification |
| Surface Roughness Tester | Ra measurement on sealing surfaces |
Typical Parts Produced
Our Stainless Steel pipe fittings range includes: SS 304/316 BSP and NPT threaded elbows (90° and 45°), SS equal and reducing tees, SS socket weld and butt weld elbows, SS threaded couplings (full and half couplings), SS hex nipples and barrel nipples, SS reducing nipples and close nipples, SS hex bushings and reducing bushings, SS pipe plugs (hex head and square head), SS pipe caps, SS unions (ground joint and seat face), SS street elbows, SS cross fittings, SS concentric and eccentric reducers, and SS weld-o-lets. Custom parts per customer drawings are a regular part of our production.
Dimensional Chart — SS Threaded Pipe Fittings (BSP/NPT)
| Nominal Size (inch) | Thread OD (mm) | TPI | Class 3000 Body Length — Elbow (mm approx.) | Class 6000 Body Length — Elbow (mm approx.) | Max. Pressure Class 3000 (bar) |
|---|---|---|---|---|---|
| 1/8″ | 9.73 | 28 | 22 | 26 | 207 |
| 1/4″ | 13.16 | 19 | 27 | 32 | 207 |
| 3/8″ | 16.66 | 19 | 32 | 38 | 207 |
| 1/2″ | 20.95 | 14 | 38 | 44 | 207 |
| 3/4″ | 26.44 | 14 | 44 | 51 | 207 |
| 1″ | 33.25 | 11 | 51 | 60 | 207 |
| 1-1/4″ | 41.91 | 11 | 60 | 70 | 207 |
| 1-1/2″ | 47.80 | 11 | 67 | 79 | 207 |
| 2″ | 59.61 | 11 | 79 | 92 | 207 |
| 2-1/2″ | 75.18 | 11 | 95 | 110 | 207 |
| 3″ | 87.88 | 11 | 108 | 125 | 207 |
| 4″ | 113.03 | 11 | 133 | 152 | 138 |
Dimensions per ASME B16.11 (socket weld / threaded fittings). Pressure ratings are for Class 3000 SS 316 at ambient temperature. Class 6000 and Class 9000 available for higher pressure service.
Surface Finish and Passivation Options
| Finish | Description | Application |
|---|---|---|
| As-machined (2B mill finish) | Standard machined surface | Industrial, structural |
| Pickled and Passivated | ASTM A380 chemical treatment | All Stainless Steel fittings standard |
| Electro-polished | Electrochemical bright polishing, Ra <0.8 µm | Pharma, food, biotech, semiconductor |
| Mirror Polished (#8 finish) | Ra <0.05 µm, reflective surface | Decorative, architectural, food grade |
| Bead Blasted (satin) | Uniform matt surface | Architectural, food processing |
| PED-compliant passivation | Per ASTM A967 | EU Pressure Equipment Directive compliance |
International Standards for Stainless Steel Pipe Fittings
Our Stainless Steel pipe fittings are manufactured and tested in compliance with the following standards: ASME B16.11 (Forged Fittings, Socket-Welding and Threaded), ASME B16.9 (Factory-Made Wrought Buttwelding Fittings), ASTM A182 (Forgings, Stainless and Heat-Resisting Alloys for Flanges, Fittings, and Valves), ASTM A403 (Wrought Austenitic Stainless Steel Piping Fittings), BS 3799 (Specification for Steel Pipe Fittings), DIN 2999 / ISO 7-1 (Pipe thread dimensions), IS 1239 (Mild Steel Tubes, Tubulars and Other Wrought Steel Fittings — adapted for SS), EN 10253 (Butt-welding pipe fittings, Stainless Steel), and JIS B 2302 (Screwed fittings for pipes — Japanese standard).
Industries Using Stainless Steel Pipe Fittings
The oil and gas industry is one of the largest users of Stainless Steel pipe fittings, relying on high-alloy SS 316 and Duplex SS for offshore platforms, subsea pipelines, and gas processing systems. The pharmaceutical and biotechnology sector demands electro-polished SS 316L fittings to meet FDA and USP hygiene standards. The food and beverage industry uses hygienic Stainless Steel fittings in dairy, brewery, and food production lines where CIP (clean-in-place) and SIP (steam-in-place) cleaning processes are mandatory. The chemical and petrochemical industry uses high-Molybdenum grades like SS 317L and 2205 Duplex for handling chlorides, sulphuric acid, and corrosive process streams. Power generation plants, water treatment facilities, semiconductor manufacturing, HVAC systems, marine and offshore applications, and cryogenic installations also rely heavily on precision Stainless Steel threaded and butt-welded pipe fittings.
Tolerances
| Parameter | Tolerance | Reference Standard |
|---|---|---|
| Thread form (BSP) | ISO 228-1 / BS EN 10226 Class A | Medium quality class |
| Thread form (NPT) | ANSI/ASME B1.20.1 Class 2 | Standard tolerance |
| O.D. of body | ±0.25 mm (up to 50 mm dia.) | ASME B16.11 |
| Centre-to-end (elbows/tees) | ±1 mm (up to DN50) | ASME B16.11 |
| Wall thickness | −12.5% / +unlimited | ASME B36.19M |
| Surface roughness (passivated) | Ra ≤ 3.2 µm | ISO 1302 |
| Surface roughness (electro-polished) | Ra ≤ 0.8 µm | ASME BPE standard |
| Concentricity | 0.2 mm TIR max. | CMM verified |
Turnaround Time
Standard Stainless Steel pipe fittings in SS 304 and SS 316 from common bar stock (½” to 2″ BSP/NPT) are typically shipped within 4–6 weeks from order confirmation. Special alloy grades such as SS 317L, 2205 Duplex, or SS 904L, and non-standard sizes or configurations require 6–8 weeks. Prototype samples for new product qualification are dispatched in 2–3 weeks. We can schedule air freight for time-critical orders. Our production planning team keeps customers informed of milestone updates throughout the production cycle.
Performance Metrics
| Metric | Value / Rating |
|---|---|
| Hydrostatic Test Pressure (Class 3000) | 1.5× working pressure per ASME B16.11 |
| Max. Working Pressure — Class 3000 (SS 316) | 207 bar at 38°C |
| Max. Working Pressure — Class 6000 (SS 316) | 414 bar at 38°C |
| Temperature Range | −196°C to +870°C (grade dependent) |
| Pitting Resistance Equivalent Number — SS 316L | PREN ≥ 24 (good chloride resistance) |
| Dimensional Rejection Rate (PPM) | < 400 PPM |
| Alloy Compliance Rate | 100% (spectrometer per heat) |
Why Choose Us for Stainless Steel Pipe Fittings?
Cable Glands India brings three decades of manufacturing expertise and global export experience to the supply of precision Stainless Steel pipe fittings. Our combination of in-house machining, alloy verification, pressure testing, and post-machining passivation means you receive fittings that are fully compliant — dimensionally, chemically, and functionally — right out of the box.
Full Alloy Traceability: Every production batch of Stainless Steel fittings is verified by OES (Optical Emission Spectrometer) analysis. Material Test Certificates conforming to EN 10204 3.1 or 3.2 are available on request. This is particularly important for critical applications in the oil and gas, pharmaceutical, and nuclear industries where alloy substitution is unacceptable.
Customisation at Every Level: We produce Stainless Steel pipe fittings as per customer drawings, STEP files, or samples. Special alloy grades, unique thread forms, non-standard body configurations, and custom markings (heat number, customer part number, grade stamp) are all handled in-house. No subcontracting — full control of quality at every stage.
Flexibility in MOQ and Production Run: Whether you need 50 pieces of a special Duplex SS fitting for a pilot plant or 50,000 pieces of SS 316L couplings for a large project, we scale accordingly. Our flexible production scheduling accommodates both without compromising lead time commitments.
Global Documentation Compliance: We are experienced in preparing export documentation for buyers in regulated markets — NACE MR0175/ISO 15156 compliance documents for sour service, FDA material compliance letters for food and pharmaceutical applications, PED 2014/68/EU compliance for European buyers, and REACH declarations for chemical substances.
Customised Packaging and Branding: We offer white-label packaging with the customer’s logo, brand name, and part numbering. Individual polybag-wrapped fittings, partitioned inner trays, and sturdy outer cartons with pallet strapping are standard. Custom marking with paint sticks, electrochemical etching, or laser marking is available.
Packaging and Shipping
Stainless Steel pipe fittings are individually wrapped in protective polybags (VCI anti-corrosion bags for long-distance sea freight), sorted into partitioned cardboard trays or bulk polyethylene bags, and packed in double-wall corrugated cartons with corner guards. Cartons are clearly labelled with part number, grade, size, quantity, and lot number. Pallets are stretch-wrapped and banded for container shipment. Export documentation includes commercial invoice, packing list, bill of lading or airway bill, certificate of origin, and material test certificates. We export to all major global ports and are experienced with Incoterms 2020 — FOB, CIF, CFR, and DDP as required.
Customer Testimonials
“We have been importing SS 316L threaded fittings and socket weld fittings from Cable Glands India for our offshore and pharmaceutical projects in Germany. Their quality documentation — EN 10204 3.1 MTCs, dimensional inspection reports, and pressure test certificates — is always complete and accurate. Lead times are consistently within the agreed 5–6 week window. The communication from their team is outstanding. I strongly recommend them as a reliable Indian source for Stainless Steel pipe fittings.”
— Klaus W. Müller, Technical Procurement Manager, Hamburg, Germany
“As a plumbing and HVAC supplies distributor in Australia, we source a significant volume of SS 304 and SS 316 fittings for our customers. Cable Glands India has been our primary supplier for over four years. Their fittings are consistently within tolerance, properly passivated, and packed in a way that prevents damage during transit. Their willingness to supply private-label packaging with our brand has been a huge advantage for us in the market.”
— Andrew P. Mitchell, Managing Director, Melbourne, Australia
Typical Q & A Session — Stainless Steel Pipe Fittings
Q1. What is the difference between SS 304 and SS 316 for pipe fittings?
A. SS 304 (18% Cr, 8% Ni) is the general-purpose grade suitable for mild corrosion environments, food processing, and structural use. SS 316 (16% Cr, 10% Ni, 2% Mo) offers superior chloride and pitting corrosion resistance due to its Molybdenum content, making it the preferred choice for marine, chemical, and pharmaceutical applications.
Q2. What thread standards do you offer for Stainless Steel fittings?
A. BSP (BSPP parallel and BSPT taper), NPT (American taper), metric ISO threads (DIN 13), and JIS taper pipe threads. Custom thread forms per customer drawings are available.
Q3. Are your Stainless Steel fittings compliant with ASME B16.11?
A. Yes. Our forged and machined Stainless Steel threaded fittings conform to ASME B16.11 in Classes 3000 and 6000. Class 9000 is available for high-pressure special applications.
Q4. What is passivation and why is it important for SS fittings?
A. Passivation (per ASTM A380) is a chemical process — typically using nitric or citric acid — that removes free iron and other surface contaminants introduced during machining and restores the chromium oxide passive layer. It is essential for maximum corrosion resistance and is standard on all our Stainless Steel fittings.
Q5. Do you supply electro-polished Stainless Steel fittings for pharmaceutical use?
A. Yes. We supply electro-polished SS 316L fittings for use in pharmaceutical, biotech, semiconductor, and high-purity fluid systems. Surface roughness Ra ≤ 0.8 µm (or custom Ra requirements) can be achieved per ASME BPE and customer specifications.
Q6. Can you supply Duplex Stainless Steel (2205) pipe fittings?
A. Yes. We manufacture pipe fittings in 2205 Duplex (UNS S32205) for highly corrosive or high-strength applications. PREN ≥ 35 and full MTC per EN 10204 3.1 are standard.
Q7. What is your minimum order quantity?
A. MOQ is typically 100 pieces per size/type for standard grades. For special alloys or custom configurations, MOQ is subject to discussion based on raw material and setup costs.
Q8. What documentation do you provide with shipments?
A. Standard documentation includes: commercial invoice, packing list, certificate of origin, and MTC (EN 10204 2.1 standard). EN 10204 3.1 and 3.2 certification, NACE compliance, PED compliance declarations, and inspection certificates from SGS, BV, or TÜV are available on request.
Q9. What is the maximum working pressure of Class 3000 SS 316 fittings?
A. Per ASME B16.11, Class 3000 SS 316 fittings are rated at 207 bar (3000 psi) at 38°C. Ratings reduce at elevated temperatures per ASME B16.11 pressure-temperature tables.
Q10. Do you offer socket weld fittings in addition to threaded?
A. Yes. We supply both threaded and socket weld configurations in SS 304, SS 316, and SS 316L to ASME B16.11 in Classes 3000, 6000, and 9000.
Q11. Can Stainless Steel fittings be used in cryogenic applications?
A. Yes. Austenitic Stainless Steel grades (SS 304, SS 316, SS 316L) maintain excellent toughness and ductility at cryogenic temperatures down to −196°C, making them ideal for LNG, LPG, and liquid nitrogen service.
Q12. How do I specify the grade when ordering?
A. Specify the ASTM grade (e.g., A182 F316L), fitting type (e.g., 90° elbow), thread form (e.g., 1″ BSP), pressure class (e.g., Class 3000), finish (e.g., passivated), and quantity. We can also match to DIN, JIS, or EN equivalent grades.
Q13. What is your delivery time?
A. Standard SS 304 / SS 316 items: 4–6 weeks. Special grades (317L, 2205, 904L): 6–8 weeks. Samples: 2–3 weeks.
Q14. Can you supply third-party inspection?
A. Yes. We can arrange pre-shipment inspection by SGS, Bureau Veritas, Intertek, or Lloyd’s Register. Customer-nominated inspectors are also welcome at our facility.
Q15. Are your fittings suitable for use with seawater?
A. SS 316 and SS 316L offer good resistance to seawater and marine atmospheric corrosion. For more aggressive seawater environments, we recommend 2205 Duplex or 6Mo Super Austenitic Stainless Steel (e.g., UNS S31254).
Q16. Do you offer custom size Stainless Steel pipe fittings?
A. Yes. We regularly produce non-standard sizes, custom body configurations, and special dimensions based on customer drawings. DFM review and tooling discussion are provided at no charge.
Glossary of Terms
PREN (Pitting Resistance Equivalent Number): A formula-based index used to predict the pitting corrosion resistance of Stainless Steel — PREN = %Cr + 3.3×%Mo + 16×%N. Higher PREN indicates better resistance. Passivation (ASTM A380): Chemical treatment of Stainless Steel surfaces to remove iron and contaminants, restoring the natural chromium oxide passive layer. Electro-polishing: An electrochemical process that removes surface material from Stainless Steel, resulting in a bright, smooth, ultra-low roughness surface ideal for hygienic applications. Duplex Stainless Steel: A two-phase (austenitic + ferritic) Stainless Steel alloy offering approximately twice the strength of standard austenitic grades combined with excellent corrosion resistance. EN 10204 3.1: A European standard for material test certificates issued by the manufacturer, certifying that the material supplied meets the specified requirements. CIP/SIP: Clean-in-place / Steam-in-place — automated cleaning processes used in pharmaceutical and food industries that require smooth, non-porous internal surfaces to prevent bacterial growth. Socket Weld Fitting: A type of pipe fitting where the pipe is inserted into a recessed socket and fillet-welded on the outside. Suitable for high-pressure small-bore piping.
Related Parts
Stainless Steel BSP fittings, SS NPT fittings, SS 304 pipe fittings, SS 316 threaded fittings, SS 316L pipe fittings, Duplex SS fittings, SS socket weld fittings, SS butt weld fittings, SS pipe nipples, SS hex nipples, SS elbows, SS tee fittings, SS couplings, SS reducers, SS union fittings, SS pipe plugs, SS pipe caps, SS flanges, SS pipe bends, Stainless Steel tube fittings, SS compression fittings
Request a Quote for Stainless Steel Pipe Fittings
Contact us today with your Stainless Steel pipe fitting requirements — grade, size, thread form, pressure class, finish, and quantity. Our technical team will respond within 24 hours with a competitive quotation and full production details. Experience the Cable Glands India difference — 30 years of precision manufacturing, global export expertise, and a genuine commitment to quality and customer satisfaction
📧 Email: sales@cableglandsindia.com
📞 Phone: +91-22-43449300 | +91-22-43449323