Stainless Steel Butt Weld Pipe Fittings, Stainless Steel Pipe End Cap, SS Pipe Fittings Stockist, Supplier of ASTM A403 WP Stainless Steel 90 Degree Elbow in India, Stainless Steel Short Radius Elbow Supplier, ss buttweld fittings, Stainless Steel 180 Deg Bend, Buttweld Fittings Suppliers, Stainless Steel Seamless Pipe Fittings, Stainless Steel Pipe Bend Supplier in Mumbai, India
Amardeep Steel Centre is a leading manufacturer, stockist, and exporter of stainless steel buttweld fittings, supplying seamless and welded configurations to engineering, construction, and process industries in all parts of the world. Our stainless steel butt weld pipe fittings are manufactured under ASTM A403 / ASME SA-403 and their dimensions are ASME/ANSI B16.9, B16.28, and MSS-SP-43, which is why they are the first choice of high-pressure and high-temperature piping system. Available in all major austenitic grades from the widely used 304/304L and 316/316L to specialist grades such as 317L, 321, 347, 310S, and 904L — our stainless steel weld pipe fittings are sized from 1/8" NB through 48" NB across schedules 5S to XXS
We offer a wide selection of SS Buttweld Fittings, including elbows, tees, reducers, stub ends, caps, and crosses, available in both seamless and welded forms. Our range of Stainless Steel Buttweld Pipe Fittings covers everything from high-pressure pipelines to low-maintenance utility systems. Whether you need a SS Buttweld fitting Elbow for directional changes, a Stainless Steel Seamless Pipe Fitting for strength-critical operations, or a welded buttweld fitting for cost-effective projects, our portfolio ensures every requirement is covered.
As established stainless butt weld fittings suppliers with a proven track record in oil & gas, chemical processing, power generation, pharmaceuticals, and marine sectors, Amardeep Steel has its own complete ready stock and provides a short lead time with complete documentation of its products in Mill Test Certificates (MTC), EN 10204 3.1 / 3.2 certificates, NACE MR0175 compliance, and third party inspection by TPIA agencies like SGS, Bureau Veritas and Lloyds Register.
Request a Quote Contact Amardeep Steel Centre for the best prices on Stainless Steel Buttweld Fittings with full material traceability, mill test certificates, and express delivery worldwide.
Types Of Stainless Steel Buttweld Fittings
Stainless Steel Buttweld Fittings Specifications
All stainless steel butt weld pipe fittings supplied by Amardeep Steel Centre meet or exceed the following technical specifications:
| Parameter | Details |
|---|---|
| Specification | ASTM A403 / ASME SA-403 |
| Standard | ASME/ANSI B16.9, ASME B16.28, MSS-SP-43, MSS-SP-75 |
| Size Range | 1/8" NB to 48" NB (Seamless & Welded/Fabricated) |
| Wall Thickness / Sch. | SCH 5S, 10S, 20, 40S, STD, 60, 80S, XS, 100, 120, 140, 160, XXS |
| Types | Seamless / Welded / Fabricated |
| End Connection | Butt-Weld (BW) |
| Surface Finish | Pickled & Passivated / Bright Annealed / As-Rolled |
| Test & Inspection | Hydrostatic, PMI, IGC, Hardness, Radiography (on request) |
| Additional Standards | DIN/EN 10253, JIS B2311/2312, ISO 3419, GOST |
| NACE Compliance | Available with NACE MR 01-75 |
SS Buttweld Fittings Grades
We supply stainless steel buttweld fittings in the following grades, each selected to match the corrosion resistance, mechanical strength, and temperature requirements of your application:
- Oil & Gas Pipelines: SS buttweld fittings are used to connect and bend pipelines in upstream, midstream, and downstream operations. Their durability ensures long service life under high pressure and corrosive environments.
- Chemical & Petrochemical Plants: Resistant to acids, solvents, and chemicals, these fittings are ideal for transporting aggressive media. They help maintain process safety in refineries, fertilizer plants, and chemical processing units.
- Power Generation: In thermal and nuclear plants, SS fittings withstand high pressure and elevated temperatures. They are commonly used in steam lines, cooling water systems, and boiler feed piping.
- Food & Beverage Processing: With hygienic, non-reactive surfaces, stainless steel fittings are essential for sanitary piping. They ensure product purity in breweries, dairies, and packaged food production facilities.
- Marine & Offshore Structures: SS buttweld elbows, tees, and reducers are extensively used in shipbuilding and offshore rigs. Their excellent resistance to seawater corrosion makes them a preferred choice in marine environments.
- Water Treatment & Desalination: These fittings are critical for brine, freshwater, and wastewater piping systems. Their ability to resist pitting and chloride attack ensures reliable performance in desalination plants.
- Government-recognised export house with over two decades of international supply experience.
- Comprehensive mill stock of stainless steel buttweld fittings across all grades and schedules ready for immediate dispatch.
- Full material traceability: Heat certificates, EN 10204 3.1 / 3.2 MTCs, NACE compliance, and PMI test reports supplied as standard.
- Third-party inspection accepted from SGS, Bureau Veritas, LRIS, TUV, and Intertek.
- Competitive pricing with transparent price lists request a quote for volume or project-specific requirements.
- Packaging to ISPM-15 standards for international export; fumigated wooden crates, paper interleaving, and end protectors.
- Single-source supply capability: pipe, fittings, flanges, valves, and fasteners from one stockist.
Chemical Composition of SS Buttweld Fittings (ASTM A403 / ASTM A240)
The table below gives indicative chemical compositions for the main stainless steel grades used in our stainless steel weld pipe fittings. All heats are verified by incoming PMI (Positive Material Identification) testing.
| Grade | C max (%) | Cr (%) | Ni (%) | Mo (%) | Others |
|---|---|---|---|---|---|
| 304/304L | 0.07/0.03 | 17.5-19.5 | 8.0-12.0 | - | - |
| 316/316L | 0.08/0.03 | 16.0-18.0 | 10.0-14.0 | 2.00-3.00 | - |
| 317/317L | 0.08/0.03 | 18.0-20.0 | 11.0-15.0 | 3.00-4.00 | - |
| 321 | 0.08 | 17.0-19.0 | 9.0-12.0 | - | Ti 5xC/0.70 |
| 347 | 0.08 | 17.0-19.0 | 9.0-13.0 | - | Nb 10xC/1.00 |
| 310S | 0.08 | 24.0-26.0 | 19.0-22.0 | - | - |
| 904L | 0.02 | 19.0-23.0 | 23.0-28.0 | 4.00-5.00 | Cu 1.0-2.0 |
Note: Values shown are maximum unless a range is indicated. Full heat analysis and product analysis are available with every batch.
Mechanical Properties of Stainless Steel Butt Weld Pipe Fittings
Mechanical properties are verified to ASTM A403 requirements. Typical minimum values for solution-annealed condition are shown below:
| Grade | Yield Str. (MPa) | Tensile Str. (MPa) | Elongation (%) | Hardness (HBW) |
|---|---|---|---|---|
| 304/304L | 205 / 170 | 515 / 485 | 40 | 201 / 201 |
| 316/316L | 205 / 170 | 515 / 485 | 40 | 217 / 217 |
| 317/317L | 205 / 205 | 515 / 515 | 40 | 217 / 217 |
| 321 | 205 | 515 | 40 | 217 |
| 347 | 205 | 515 | 40 | 201 |
| 310S | 205 | 515 | 40 | 217 |
| 904L | 220 | 490 | 35 | 196 |
Dimensions - Stainless Steel Buttweld Fittings (ASME B16.9)
90 Degree & 45 Degree Elbow Center-to-Face Dimensions (Inches)
Dimensions below are for long radius (LR) and short radius (SR) elbows as per ASME/ANSI B16.9. Short radius (SR) elbows are supplied to ASME B16.28.
| NPS (in) | OD (mm) | OD (in) | 90 Degree LR C-F (in) | 90 Degree SR C-F (in) | 45 Degree LR C-F (in) |
|---|---|---|---|---|---|
| 1/2 | 21.3 | 0.840 | 1 1/2 | - | 5/8 |
| 3/4 | 26.7 | 1.050 | 1 1/8 | - | 7/16 |
| 1 | 33.4 | 1.315 | 1 1/2 | 1 | 7/8 |
| 1 1/2 | 48.3 | 1.900 | 2 1/4 | 1 1/2 | 1 1/8 |
| 2 | 60.3 | 2.375 | 3 | 2 | 1 3/8 |
| 3 | 88.9 | 3.500 | 4 1/2 | 3 | 2 |
| 4 | 114.3 | 4.500 | 6 | 4 | 2 1/2 |
| 6 | 168.3 | 6.625 | 9 | 6 | 3 3/4 |
| 8 | 219.1 | 8.625 | 12 | 8 | 5 |
| 10 | 273.1 | 10.750 | 15 | 10 | 6 1/4 |
| 12 | 323.9 | 12.750 | 18 | 12 | 7 1/2 |
Weight Chart - 90 Degree Elbow, 45 Degree Elbow & Equal Tee (kg)
Theoretical weights for the most common fitting types across Schedule 10S and Schedule 40S (ASME B16.9):
| Size | SCH10S 90 Degree Elb | SCH10S 45 Degree Elb | SCH10S Equal Tee | SCH40S 90 Degree Elb | SCH40S 45 Degree Elb | SCH40S Equal Tee |
|---|---|---|---|---|---|---|
| DN 15 (1/2 inch) | 0.06 | 0.03 | 0.09 | 0.08 | 0.04 | 0.10 |
| DN 25 (1 inch) | 0.14 | 0.08 | 0.28 | 0.15 | 0.11 | 0.29 |
| DN 50 (2 inch) | 0.50 | 0.25 | 0.85 | 0.70 | 0.40 | 1.28 |
| DN 80 (3 inch) | 1.25 | 0.63 | 1.77 | 2.20 | 1.08 | 3.31 |
| DN 100 (4 inch) | 2.10 | 1.08 | 3.46 | 4.47 | 2.09 | 5.27 |
| DN 150 (6 inch) | 5.45 | 2.72 | 8.07 | 10.89 | 5.44 | 10.99 |
| DN 200 (8 inch) | 10.20 | 5.33 | 15.65 | 21.54 | 10.77 | 20.91 |
| DN 300 (12 inch) | 25.80 | 13.62 | 39.46 | 59.42 | 29.71 | 62.14 |
Manufacturing Tolerances (ASME B16.9 / B16.28)
Amardeep Steel Centre's stainless butt weld fittings are manufactured within the following dimensional tolerances per ASME B16.9:
| Size Range | OD Bevel End (mm) | ID End (mm) | Wall Thk. (mm) | Elbow C-F (mm) | Tee C-E (mm) |
|---|---|---|---|---|---|
| DN 15-65 (NPS 1/2-2 1/2) | +1.6 / -0.8 | 0.8 | ±1.6 | ±1.6 | ±1.6 |
| DN 80-100 (NPS 3-4) | +1.6 / -0.8 | 0.8 | ±1.6 | ±1.6 | ±1.6 |
| DN 125-200 (NPS 5-8) | +2.4 / -1.6 | 0.8 | ±1.6 | ±1.6 | ±1.6 |
| DN 250-450 (NPS 10-18) | +4.0 / -3.2 | 3.2 | ±2.4 | ±2.4 | ±2.4 |
| DN 500-600 (NPS 20-24) | +6.4 / -4.8 | 4.8 | ±3.2 | ±3.2 | ±3.2 |
Equivalent Grade Cross Reference - Stainless Steel Buttweld Fittings
The table below cross-references ASTM grades with international standards commonly referenced for stainless steel butt weld pipe fittings:
| ASTM | UNS | JIS | EN / DIN | KS | AS/NZS |
|---|---|---|---|---|---|
| 304 | S30400 | SUS304 | 1.4301 | STS304 | 304 |
| 304L | S30403 | SUS304L | 1.4306 | STS304L | 304L |
| 316 | S31600 | SUS316 | 1.4401 | STS316 | 316 |
| 316L | S31603 | SUS316L | 1.4404 | STS316L | 316L |
| 317L | S31703 | SUS317L | 1.4438 | STS317L | 317L |
| 321 | S32100 | SUS321 | 1.4541 | STS321 | 321 |
| 347 | S34700 | SUS347 | 1.4550 | STS347 | 347 |
| 310S | S31008 | SUS310S | 1.4845 | STS310S | 310S |
| 904L | N08904 | SUS890L | 1.4539 | STS890L | 904L |
Applications of Stainless Steel Buttweld Fittings
Stainless steel buttweld fittings are widely chosen for their strength, corrosion resistance, and ability to provide leak-proof joints in critical piping systems. Below are the key industries and applications where these fittings are extensively used.
Applicable Standards & Codes
| Standard | Description |
|---|---|
| ASTM A403 / ASME SA-403 | Standard specification for wrought austenitic stainless steel piping fittings |
| ASME/ANSI B16.9 | Factory-made wrought buttwelding fittings long radius elbows, tees, reducers, caps |
| ASME B16.28 | Wrought steel buttwelding short radius elbows and returns |
| MSS-SP-43 | Wrought and fabricated buttwelding fittings for low-pressure / corrosion-resistant applications |
| MSS-SP-75 | High-strength wrought buttwelding fittings |
| DIN/EN 10253 | European standard butt-welding pipe fittings for industrial applications |
| JIS B2311 / 2312 / 2313 | Japanese industrial standards for buttweld pipe fittings |
| ISO 3419 | Non-alloy and alloy steel buttweld fittings |
| GOST 17375-2001 | Russian standard for seamless steel buttwelding elbows |
| NACE MR 0175 / ISO 15156 | Materials for equipment in H2S-containing environments (sour service) |
Why Source from Amardeep Steel Centre?
Frequently Asked Questions About Stainless Steel Buttweld Fittings
Q1. What are Stainless Steel Buttweld Fittings?
Stainless Steel Buttweld Fittings are welded components used to join pipes, ensuring strong, leak-proof, and durable connections in industrial piping systems.
Q2. What grades are available in SS Buttweld Fittings?
They are commonly available in grades like 304, 304L, 316, 316L, 321, 347, and 904L.
Q3. What is the difference between seamless and welded buttweld fittings?
Seamless fittings, often referred to as Stainless Steel Seamless Pipe Fittings, are made from seamless pipes for higher strength, while welded fittings are cost-effective and ideal for moderate pressure use.
Q4. Can SS Buttweld Fittings resist corrosion?
Yes, stainless steel grades like 316L and 904L provide excellent resistance against corrosion, especially in chloride and acidic environments.
Q5. What standards govern SS Buttweld Fittings?
Standards include ASTM A403, ASME SA403, ASME B16.9, MSS SP-43, DIN, and EN.
Q6. What industries use SS Buttweld Fittings?
They are widely used in oil & gas, chemical, petrochemical, food processing, marine, and power generation sectors.
Q7. How are SS Buttweld Fittings tested for quality?
They undergo hydrostatic, radiography, PMI, hardness, and intergranular corrosion tests before dispatch.
Q8. What sizes are available?
Standard sizes range from ½” NB to 48” NB with schedules from Sch 5S to Sch XXS.
