Carbon Steel Buttweld Fittings Manufacturer & Supplier
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Midland Alloys Inc. is a trusted Indian manufacturer and global supplier of Carbon Steel Buttweld Fittings, offering a comprehensive range including elbows, tees, reducers, stub ends, and caps. These fittings are crafted from ASTM A420 Gr. WPL6 carbon steel, designed especially for low-temperature applications. The material comprises carbon, manganese, phosphorus, sulfur, and silicon, providing excellent mechanical strength and weldability. We provide fittings with various grades, including ASTM A420 WPL6 that adhere to ASTM/ASME A234 and A420 standards, and have a fine-grained ferrite-pearlite structure. We supply both seamless and welded A420 Gr.WPL6 pipe fittings which guarantee pressure compatibility and dimensional accuracy for demanding piping systems.
Benefits of Using Carbon Steel Buttweld Fittings
- Strength and Reliability: These fittings withstand high internal pressures and mechanical stresses without deformation or failure.
- Leak Resistance: Uniform weld joints create tight seals, reducing the risk of leakage in pipelines.
- Smooth Flow Characteristics: In fluid systems, the smooth internal transition guarantees less turbulence and pressure loss.
- Aesthetic Appeal: Flush welding and consistent finishing provide a clean and professional installation appearance.
- Durability: A420 Grade WPL6 pipe fittings offer long service life even in corrosive or abrasive service conditions.
Specification of Carbon Steel buttweld fittings
Seamless Butt Weld Fittings: 1/2" - 10" Welded Butt Weld Fittings: 1/2" - 48"
ASTM A234/ ASME SA234
Forge, Cast, Push, Press, etc.
90 Deg. Elbow, 45 Degree Elbow, LR/SR Elbow, Reducers, Tee, Cross, Bends, U bend, 180 Deg Bend, End Cap, Lap-joint Stub End
ASME/ANSI B16.9, ASME B16.28, MSS-SP-43, BS4504, BS4504, BS1560, BS10
Plain End, Beveled End, Treaded
SCH10, SCH20, SCH30, STD SCH40, SCH60, XS, SCH 80, SCH 100, SCH 120, SCH 140, SCH 160, XXS available with NACE MR 01-75
Seamless / Welded / Fabricated
Types of Carbon Steel buttweld fittings
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Elbow (90°, 45°, Long Radius, Short Radius)Modifies the pipeline's flow direction at predetermined angles with regulated radii.
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Tee (Equal Tee, Reducing Tee)Adjusts the size of the main and branch lines to split or combine flow at 90° intersections.
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A reducer (eccentric or concentric)joins pipes with varying diameters while preserving flow offset or alignment.
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stub endIn non-permanent piping configurations, the stub end (long or short) connects to lap joint flanges for disassembly.
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Return Bends (180° bend)Redirects flow by 180 degrees, allowing the pipeline to reverse direction.
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Cross (Equal Cross, Reducing Cross)Provides multidirectional flow by joining four pipes at right angles.
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pipe capTo stop flow or pressure, an end cap also known as a pipe cap, seals the pipe's open end.
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Carbon Steel Lateral Teeused in piping systems to branch a pipeline at a 45° angle, ensuring smoother flow with reduced turbulence.
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Carbon steel Equal CrossA Carbon Steel Equal Cross is a pipe fitting used to connect four pipes of the same diameter at right angles.
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Carbon Steel Long Stub EndA Carbon Steel Long Stub End is used with lap joint flanges to allow easy disassembly of piping systems for inspection and maintenance.
Technical Details & Delivery Condition
| Element | Carbon (C) | Manganese (Mn) | Silicon (Si) | Phosphorus (P) | Sulfur (S) | Iron (Fe) |
|---|---|---|---|---|---|---|
| Carbon Steel Buttweld Fittings (% by weight) | 0.05% – 2.1% | 0.30% – 1.65% | 0.15% – 0.60% | ≤ 0.035% | ≤ 0.040% | Remainder (balance) |
| Properties | Imperial | Metric |
| Tensile strength | 86300 psi | 595 MPa |
| Modulus of elasticity | 29000 ksi | 200 GPa |
| Yield strength | 37700 psi | 260 MPa |
| Poisson’s ratio | 0.27-0.30 | 0.27-0.30 |
| Hardness, Rockwell B | 85 | 85 |
| Elongation at break (in 50 mm) | 55% | 55% |
| Standard | Specification | Equivalent Grades |
|---|---|---|
| ASTM / ASME | A234 WPB / ASME SA234 WPB | Carbon Steel Buttweld Pipe Fittings |
| DIN | DIN 2605 / 2615 / 2616 | St 37.0, St 35.8, St 45 |
| EN | EN 10253-2 | P235GH, P265GH |
| ISO | ISO 3419 / ISO 5251 | CS Pipe Fittings |
| JIS | JIS B2311 / B2312 / B2313 | SGP, SCH 20, SCH 40 |
| BS | BS 1640 / BS 1965 | 3601, 3602 |
Carbon Steel Buttweld Fittings Grades We Offer
Carbon Steel Buttweld Fittings Manufacturing Standards
| ASME B16.9 ASTM A234 Pipe Fittings | Factory-Made Wrought Buttwelding Fittings | Long Radius Elbows, Long Radius Reducing Elbows, Long Radius Returns, Short Radius Elbows, Short Radius 180-deg Rerurns, 3D elbows, Straight Tees, Straight Crosses, Reducing Outlet Tees, Reducing Outlet Crosses, Lap Joint Stub Ends, Caps, Reducers |
| ASME B16.28 | Short Radius Elbows, Short Radius 180-deg Returns | |
| MSS SP43 | Wrought and Fabricated Butt-Welding Fittings for Low Pressure, Corrosion Resistant Applications | Long Radius Elbows, Straight and Reducing-on-the-Outlet Tees, Lap Joint Stub ends, caps, long radius 180 Degree returns, concentric reducers, eccentric reducers |
| Mss SP75 | Long Radius Elbows, 3R elbows, straight tees, reducing outlet tees, caps, reducers |
Sizing Table of Carbon Steel Buttweld Fittings
| Products | Sizes |
| CS Stub Ends | 1/2" NB to 14" NB |
| CS Cups | 1/2" NB to 14" NB |
| CS Socket Weld | Upto 2" NB |
| CS Tees | 1" NB to 14" NB |
| CS Nipples | Upto 4" |
| CS Couplings | Upto 4"NB |
| CS Reducers | 1" NB to 14" NB |
| CS Elbow | 1/2" NB to 14" NB |
High Temp Carbon Steel Fittings Pressure Rating
| Pressure-Temperature Ratings for ASME B16.9 Carbon Steel Buttweld Pipe Fittings (psig) | |||||
|---|---|---|---|---|---|
| Temperature Ratings | Pressure Class | ||||
| 150 | 300 | ||||
| 1/4 – 1 Inches | 1 1/4 – 2 Inches | 2 1/2 – 3 Inches | |||
| (oF) | (oC) | ||||
| -20 to 150 | -29 to 66 | 300 | 2000 | 1500 | 1000 |
| 200 | 93 | 265 | 1785 | 1350 | 910 |
| 250 | 121 | 225 | 1575 | 1200 | 825 |
| 300 | 149 | 185 | 1360 | 1050 | 735 |
| 350 | 177 | 150 | 1150 | 900 | 650 |
| 400 | 204 | – | 935 | 750 | 560 |
| 450 | 232 | – | 725 | 600 | 475 |
| 500 | 260 | – | 510 | 450 | 385 |
| 550 | 288 | – | 300 | 300 | 300 |
Difference Between Carbon Steel Buttweld Fittings and Hastelloy Buttweld Fittings
Carbon Steel Buttweld Fittings (like ASTM A420 WPL6) are cost-effective and suitable for moderate pressure and temperature applications. Hastelloy fittings are engineered for highly corrosive environments, such as chemical processing and marine systems. Hastelloy offers superior resistance to oxidising and reducing agents, making it ideal for handling aggressive media, whereas carbon steel provides mechanical strength and temperature tolerance at a lower cost. The ferritic-pearlitic microstructure of carbon steel, and the austenitic-nickel-molybdenum-based structures of hastelloy have differing effects on their pricing and performance.
How Carbon Steel Buttweld Fittings Are Manufactured
Pipe
Cutting
Forming
Sizing
Heat Treatment
Pickling
Beveling
Polishing
Sand Blasting
Elbow
Inspection
Analytic
Marking
Packing & Shipping
Applications of Carbon Steel Buttweld Fittings
Carbon Steel Buttweld Fittings are widely used in critical industries requiring robust and leak-proof pipeline connections. In the oil and gas sector, they handle the transport of hydrocarbons under extreme pressures. The power generation industry uses them in high-temperature steam systems, while petrochemical and chemical plants rely on them for aggressive fluid handling. In water treatment facilities, these fittings enable reliable flow management and corrosion resistance in treatment pipelines. They are appropriate for LNG projects and cryogenic services where durability and temperature resistance are crucial due to their compliance with ASTM A420 WPL6 low-temperature fittings.
Why Choose Midland Alloys Inc. for Carbon Steel Buttweld Fittings
Midland Alloys Inc. is a leading Indian manufacturer and exporter of high-quality Carbon Steel Buttweld Fittings, adhering to ASTM/ASME A234 WPB standards and ISO-certified processes. We provide a wide range of customization options, such as surface treatments, unique schedules, end finishes and cut-to-length sizing. We guarantee quick deliveries, and expert export handling due to a strong worldwide supply network across the Gulf, Europe, Africa and Southeast Asia. Our fittings undergo rigorous in-house testing, are backed by mill certifications and third-party inspections, and are supplied with MTCs verifying full ASTM A420 WPL6 compliance.
FAQs – Carbon Steel Buttweld Fittings
Carbon steel buttweld fittings are frequently checked for mechanical integrity and material accuracy utilizing hydrostatic testing, ultrasonic inspection, radiography testing and PMI (Positive Material Identification).
Yes, grades like ASTM A420 WPL6 are perfect for LNG plants and cold service pipes because they are made especially for low-temperature and cryogenic applications.
Common finishes include black coating, anti-rust oil, hot-dip galvanizing and epoxy coating, depending on the application and environmental exposure.
