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Carbon Steel Buttweld Fittings
Carbon Steel Pipe Fittings Manufacturers In India, CS Fittings, carbon steel buttweld fittings manufacturers
Carbon Steel Buttweld Fittings Content
- Carbon Steel Buttweld Fittings Specification
- Types of Carbon Steel Buttweld Fittings
- Distributors, Stockist & Suppliers of World's Top 10 Manufacturers of Carbon Steel Buttweld Fittings
- Approved Manufacturer Makes of Carbon Steel Buttweld Fittings
- Carbon Steel Butt weld Fittings Price List
- Application of Carbon Steel Buttweld Fittings
- Export Destinations For Carbon Steel Buttweld Fittings
- Domestic Supply For Carbon Steel Buttweld Pipe Fittings
Rajveer Stainless & Alloys is India’s leading manufacturer and supplier of high-quality carbon steel pipe fittings. With decades of manufacturing expertise, we provide comprehensive solutions for industrial piping systems across diverse sectors.
We specialize in manufacturing a complete range of carbon steel pipe fittings including:
- Long Radius Elbows (90°, 45°, 180°)
- Return Bends for flow reversal applications
- U Bends with superior corrosion resistance
- Tees, Crosses, and Reducers as per international standards
Our carbon steel fittings are manufactured in various specifications including ASTM A234 WPB, ASME SA105, and A106 grades to meet diverse industrial requirements.
Rajveer
Best Price for Carbon Steel Seamless Fittings, Carbon Steel Weld Fittings
Superior Quality Carbon Steel Fittings
At Rajveer Stainless & Alloys, quality is our priority. Our carbon steel pipe fittings feature:
- Excellent mechanical strength and durability
- Precise dimensional accuracy
- Superior finish and excellent machinability
- High pressure and temperature resistance
- Compliance with international standards
Carbon Steel Pipe Fittings Specifications
| Specifications | ASTM/ASME A234 WPB / A860 – MSS-SP-75 WPHY 42 / 46 / 52 / 56 / 60 / 65 / 70 |
| Low Temperature Steel | A420 WPL3 / A420 WPL6 |
| Dimensions | ASME/ANSI B16.9, ASME B16.28, MSS-SP-43 |
| Size | ½”NB to 48″NB in Sch 10s, 40s, 80s, 160s, XXS |
| Grades | WPBW, WPHY 42, WPHY 46, WPHY 52, WPH 60, WPHY 65 & WPHY 70 |
| Type | Seamless / Welded / Fabricated |
| Thickness | Sch 5s, Sch 10s, Sch 40s, Sch 80s, Sch 160s, Sch XXS |
Material Specifications
Carbon steel butt-weld fittings are typically made from wrought carbon steel grades designed for pressure service. The most common material spec is ASTM A234 WPB, which covers wrought carbon steel fittings for moderate and high-temperature service. In ASTM notation, WPB means “Weldable, Pressure, Grade B” – a grade of carbon steel with a minimum yield of about 240 MPa. Other grades in A234 include alloy-steel variants (WP5, WP9, etc.) for elevated temperature or corrosion resistance, and A234 also covers welded constructions. Typical chemical limits for A234 WPB are ~0.35% C, ~0.30% Si, and Mn up to ~1.35%.
Buttweld fittings may be forged from seamless pipe or plate. Common base materials include ASTM A106 Grade B (seamless carbon pipe) or ASTM A53. Forgings can also use carbon steel plates such as ASTM A285 or A516 for larger diameters. For low-temperature or pressure applications, specifications like ASTM A420 WPL6 (low-temperature carbon steel) are used. The fitting ends (bevels) and welds must meet ASME B16.25 preparation standards.
Applicable Standards
Carbon Steel Buttweld fittings must meet international standards for dimensions, materials, and manufacturing. Key standards include:
- ASME/ANSI B16.9 – Factory-Made Wrought Steel Buttwelding Fittings: Defines nominal dimensions, tolerances, and marking for butt-weld fittings NPS ½” through 48” (DN15–1200). It covers elbows, tees, reducers, caps, stub ends, crosses, etc., with schedules ranging from 5S/10S up to XXS
- ASME/ANSI B16.28 – Wrought Steel Short Radius Elbows and Returns: Covers short-radius (SR) elbows (radius = 1× pipe diameter) and 180° returns for NPS ½”–48”. Short-radius elbows have higher stress concentration and are used only when space is limited
- MSS-SP-75 – High-Test Wrought Butt-Welding Fittings: A Petroleum Pipeline standard covering high-test carbon and alloy butt-weld fittings for gas and oil pipelines (NPS up to 60). It specifies more stringent toughness and proof-test requirements than B16.9, and is used for high-pressure applications.
- MSS-SP-43 – Wrought Butt-Welding Fittings (Low Pressure, Corrosion-Resistant): Specifies dimensions for low-pressure butt-weld fittings (often stainless) used in chemical plants. (Not commonly used for plain carbon steel.)
- ASTM A234/A234M, ASTM A420/A420M: Material specifications for carbon steel pipe fittings (moderate/high temperature and low-temperature). These are often referenced as material requirements in piping codes.
- ASME B31.3 / B31.1: Piping codes that govern pressure design; butt-weld fittings used in process (B31.3) or power/pipeline (B31.1/31.8) applications must be rated accordingly. Fittings are pressure-rated per ASME B16.5 flange classes or B31 rules.
Manufacturers will typically state compliance with applicable standards (e.g. “ASTM A234 WPB, ANSI B16.9, MSS-SP-75”) on product certificates.
CS Pipe Fittings Suppliers
ASME/ANSI B16.9 Carbon Steel Elbow
Carbon Steel Buttweld Reducer
Carbon Steel Buttweld Cross
Carbon Steel Buttweld Cap
Carbon Steel Buttweld Stub Ends
Carbon Steel Buttweld Tee
Carbon Steel Pipe Fittings Weight Chart
| Schedule 40S | DN | Schedule 10S | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 90° Elbow | End cap | 45° Elbow | Stub end type B | Equal tee | Stub end type B | 90° Elbow | End cap | 45° Elbow | Equal tee | |
| 0.08 | 0.04 | 0.04 | 0.08 | 0.10 | 15 | 0.07 | 0.06 | 0.03 | 0.03 | 0.09 |
| 0.08 | 0.07 | 0.04 | 0.11 | 0.17 | 20 | 0.09 | 0.07 | 0.05 | 0.03 | 0.13 |
| 0.15 | 0.10 | 0.11 | 0.17 | 0.29 | 25 | 0.16 | 0.14 | 0.08 | 0.08 | 0.28 |
| 0.26 | 0.18 | 0.17 | 0.25 | 0.59 | 32 | 0.22 | 0.23 | 0.10 | 0.11 | 0.49 |
| 0.40 | 0.20 | 0.23 | 0.31 | 0.86 | 40 | 0.25 | 0.30 | 0.11 | 0.17 | 0.68 |
| 0.70 | 0.23 | 0.40 | 0.61 | 1.28 | 50 | 0.43 | 0.50 | 0.13 | 0.25 | 0.85 |
| 1.40 | 0.27 | 0.77 | 0.80 | 2.19 | 65 | 0.57 | 0.85 | 0.19 | 0.48 | 1.41 |
| 2.20 | 0.42 | 1.08 | 1.13 | 3.31 | 80 | 0.72 | 1.25 | 0.25 | 0.63 | 1.77 |
| 4.47 | 1.14 | 1.47 | 1.87 | 5.27 | 100 | 1.09 | 2.10 | 0.68 | 1.08 | 3.46 |
| 6.80 | 2.13 | 2.84 | 2.79 | 9.63 | 125 | 1.47 | 3.65 | 1.11 | 1.82 | 5.44 |
| 10.89 | 3.23 | 5.44 | 3.57 | 10.99 | 150 | 2.15 | 5.45 | 1.42 | 2.72 | 8.03 |
| 21.54 | 5.19 | 10.77 | 6.07 | 20.91 | 200 | 3.22 | 10.20 | 2.38 | 5.33 | 15.65 |
| 38.56 | 9.00 | 19.27 | 10.07 | 35.38 | 250 | 5.13 | 18.15 | 4.45 | 9.75 | 26.76 |
| 59.42 | 15.00 | 29.71 | 14.29 | 62.14 | 300 | 8.16 | 25.80 | 7.50 | 13.62 | 39.46 |
| 79.38 | 16.00 | 35.15 | 17.14 | 79.31 | 350 | 10.88 | 36.29 | 8.17 | 18.37 | 48.53 |
| 99.79 | 21.00 | 45.81 | 20.41 | 99.79 | 400 | 12.70 | 47.63 | 10.67 | 23.81 | 58.97 |
| 129.73 | 26.00 | 59.40 | 27.21 | 129.73 | 450 | 17.23 | 59.87 | 13.00 | 29.94 | 79.65 |
| 162.38 | 34.00 | 74.84 | 29.94 | 162.39 | 500 | 21.77 | 99.80 | 17.00 | 49.90 | 103.42 |
| 225.89 | 52.00 | 105.23 | 38.55 | 225.90 | 600 | 27.21 | 140.61 | 26.00 | 70.31 | 155.58 |
Why Choose Rajveer Stainless & Alloys for Carbon Steel Pipe Fittings
ISO 9001:2015 certification covers the entire operation here, not just the final inspection stage. Raw material comes in verified, cutting tolerances get logged, and nothing leaves without a dimensional sign-off. That discipline keeps rejection rates at the project site low.
Our Mumbai warehouse holds over 5,000 CS buttweld fitting line items in stock. Standard sizes ship within the same week. For urgent shutdowns or fast-track project schedules, priority dispatch kicks in with no surcharge attached to it.
Third-party inspection through Bureau Veritas, SGS, Lloyds, DNV, or TPI runs on request and fits most pre-booked orders without extending lead time. Mill Test Certificates come in EN 10204 3.1 or 3.2 format depending on what the end-client specifies. Bulk orders from 500 kg upward get tiered pricing, with sharper discounts at the 2 MT and 5 MT marks. Export crating follows ISPM-15, with poly-wrapped bevel ends inside.
Supply runs across Mumbai, Delhi, Ahmedabad, Pune, Surat, Chennai, and Hyderabad, with inland delivery landing in 3 to 5 working days for most destinations.
Manufacturing Process of Carbon Steel Buttweld Fittings
Every fitting comes with a mill certificate. Incoming ASTM A234 WPB billets or plates go through chemical composition verification before anything gets cut. That single step prevents grade mix-ups that would only surface during PMI at the project site.
From there, plasma or saw cutting shapes the blanks to pre-form geometry. Hot forming follows, pressing the blank into the required radius and wall profile under controlled temperature conditions. After forming, a normalising or annealing cycle removes residual stress from the forming pass and stabilises the grain structure for pressure service.
CNC machining brings the internal diameter and wall thickness into tolerance. Beveling then cuts the weld-end prep to ASME B16.25 angles so field welders hit their root gap on the first fit-up. Dimensional inspection runs 100% using calibrated gauges checked against ASME B16.9 reference values. Hydrostatic testing holds each fitting at 1.5x rated working pressure. Shot blasting to Sa 2.5 preps the surface before rust-preventive coating goes on. Final packing uses export-grade crates stencilled with heat number, grade, size, and schedule so incoming inspection at the project site takes minutes, not hours.
Testing & Quality Assurance
Nine tests are run on every production lot before dispatch clearance.
PMI testing with portable XRF analysers confirms ASTM A234 WPB chemistry against the heat certificate. Any deviation stops the lot. Hydrostatic testing holds pressure at 1.5x rated working pressure for a minimum 30-second hold. Radiography per ASTM E94 checks weld zones for internal discontinuities that visual checks miss entirely. Ultrasonic testing maps wall thickness uniformity and catches sub-surface laminations before they reach a pressure boundary.
Hardness testing verifies Brinell values stay inside the ASTM A234 permitted band. Tensile and yield strength testing pulls representative samples from each heat. Impact testing to Charpy V-notch applies for low-temperature service grades where absorbed energy at -29°C must meet the grade minimum. Dimensional inspection records wall thickness, OD, bevel angle, and centre-to-face distances on every piece. Visual inspection closes the loop on surface condition, end prep quality, and marking accuracy.
Full test reports travel with the shipment. Third-party witness inspection slots run alongside production for clients who require it.
Advantages
Advantages of carbon steel butt-weld fittings include:
- Strength and Durability: The continuous steel structure and full-penetration welds yield very strong, leak-proof joints. Butt welds can withstand high pressure and fatigue better than socket-weld or threaded joints.
- Smooth Flow: Because butt-weld fittings have smooth inner surfaces and gradual geometric transitions (especially in LR elbows and reducers), they minimize pressure drop and turbulence in the line.
- Weldability: Carbon steel (especially low-carbon grades like A234 WPB) welds easily using common welding processes, simplifying installation and repair.
- Cost-effectiveness: Carbon steel material is much cheaper than stainless or alloy, while still providing good corrosion resistance to general fluids (especially with protective coatings). Compared to forged fittings, butt-weld fittings often offer a more streamlined flow path for a given size. As one industry source notes, carbon-steel butt-weld fittings balance affordability and durability.
- Versatility: Carbon steel fittings can handle a wide range of fluids (oil, gas, water, steam) and can be used in many systems (pipes, pressure vessels, heat exchangers). They can also be treated (galvanized, painted, etc.) for improved corrosion resistance if needed
Industrial Applications
Carbon steel butt-weld fittings are ubiquitous in heavy industry. They are favored in oil & gas pipelines and refineries (upstream, midstream, downstream) because of their high-pressure capability and weld strength. In petrochemical and chemical plants, they carry crude and process fluids under high T/P conditions. They are essential in power generation, forming high-pressure steam, feedwater, and condensate piping in fossil-fuel and nuclear plants. Marine and shipbuilding also use them for fuel lines, ballast systems, cooling water, and exhaust piping – the welded joints withstand vibration and corrosion in seawater service. Other applications include water treatment, pharmaceutical, food & beverage (using carbon steel for non-corrosive lines), and any chemical processing plant where high pressure or temperature demands durable joints. Their smooth flow profile makes them suited for pumping systems and long-distance pipelines.
- Petrochemical
- Oil & Gas
- Paper
- Refineries
- Nuclear Power
- Cement
- Sugar
- Power Plant
- Fertilizers
- Breweries
- Chemical
- Petrochemical
- Shipbuilding
- Defence
- Mining
- Steel Plant
- Construction
- Oil Mills
- Paper
- Engineering Co.
TYPES OF Carbon Steel Buttweld Fittings
- Carbon Steel Short Radius Elbow
- Carbon Steel Buttweld Reducer Suppliers
- Carbon Steel Buttweld Tee Manufacturer
- Carbon Steel Butt weld Reducing Nipple
- ANSI B16.9 Carbon Steel Eccentric Reducer
- Carbon Steel Reducing Cross Supplier
- Carbon Steel 45 deg.Elbow
- Carbon Steel Stub Ends
- Carbon Steel Pipe Cap
- Carbon Steel Butt weld Fittings Stockholder
- CS Pipe Fittings Exporter
- Carbon Steel Pipe Elbow Supplier
- Carbon Steel 90 deg. LR Elbow Manufacturer
- Carbon Steel 3D Elbow
- Carbon Steel Welded Pipe Fittings
- Carbon Steel 5D Elbow
- Carbon Steel Seamless Pipe Fittings
- Carbon Steel Stubends Dealer
DISTRIBUTORS, STOCKIST & SUPPLIERS OF WORLD'S TOP 10 MANUFACTURERS OF Carbon Steel Buttweld Fittings
Approved Manufacturer Makes of Carbon Steel Buttweld Fittings
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(Oman)
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(Oman)
(Abu Dhabi)
(Saudi Arabia)
(Brazil)
(Malaysia)
(Iran)
(Nigeria)
(Egypt)
Carbon Steel Buttweld Fittings Price List
| Carbon Steel Butt weld Pipe Elbow | FOB Price: US $0.5-6 / Piece |
| Carbon Steel Buttweld Elbow | FOB Price: US $1.2-2500 / Piece |
| Carbon Steel Seamless Pipe Fittings | FOB Price: US $1-5000 / Piece |
| Carbon Steel 90 deg. LR Elbow | FOB Price: US $0.11-999 / Piece |
| Type of CS Seamless 90 Degree LR Elbow | FOB Price: US $0.2-50 / Piece |
| Carbon Steel 45 deg. Elbow | FOB Price: US $0.2-500 / Piece |
| Carbon Steel Buttweld Fitting | FOB Price: US $1.2-2500 / Piece |
| Carbon Steel Butt weld Pipe Elbow | FOB Price: US $0.11-1 / Piece |
| Carbon Steel Short Radius | FOB Price: US $8-8000 / Piece |
| Carbon Steel 180° Elbow | FOB Price: US $500-600 / Piece |
| Carbon Steel SR Elbow | FOB Price: US $0.5-500 / Piece |
| Carbon Steel End Pipe Cap | FOB Price: US $1000-2000 / Ton |
FAQ
ASTM A234 WPB is the ASTM material specification covering wrought carbon steel fittings for pressure piping service. WPB grade sets a minimum tensile strength of 415 MPa and minimum yield of 240 MPa, with a service temperature window from -29°C to 427°C. It is the most widely specified grade for general-purpose CS buttweld fittings globally.
The main types are 45° elbows, 90° long-radius elbows, 90° short-radius elbows, equal tees, reducing tees, concentric reducers, eccentric reducers, end caps, crosses, and stub ends. Each type handles a specific flow direction change, diameter transition, or line termination function in a piping system.
Seamless fittings press from a solid billet with no weld seam, which makes them the default for pressure classes above 1500# and applications with high fatigue cycles. Welded fittings form from plate with a longitudinal seam joint, cost 15 to 25% less at large diameters, and suit moderate-pressure services where seam quality meets the inspection requirement.
ASME B16.9 governs factory-made buttweld fittings above 1.5″ NB. ASME B16.28 covers short-radius elbows and returns. MSS SP-43 applies to lightweight fittings. Material follows ASTM A234 and end bevel prep complies with ASME B16.25. Most project specifications call for two or more of these in combination.
Forged fittings join the pipe through threaded or socket-weld connections and top out at 4″ NB, making them the choice for instrument tapping points and small-bore branch lines. Buttweld fittings integrate directly into the pipeline through a full-penetration weld, cover ½” to 48″ NB, and carry pressure and temperature ratings that forged threaded fittings cannot match at larger diameters.
EXPORT DESTINATIONS FOR Carbon Steel Buttweld Fittings
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DOMESTIC SUPPLY FOR Carbon Steel Buttweld Fittings
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