Buttweld 45° Elbow Manufacturer, Supplier & Exporter
A buttweld 45° elbow changes the direction of a pipeline by 45°. Raaj Fittings manufactures and exports 45° elbows to ASME B16.9 in stainless steel, duplex and super duplex, nickel alloys, carbon steel and alloy steel, in seamless and welded construction, with bevelled ends for butt welding.
Buttweld 45° elbows are made with a long radius — a centreline radius of 1.5 times the nominal size — so the change of direction is gentle and the pressure drop is lower than with a 90° elbow. They are used to offset a line around obstructions, to slope lines for drainage, and in pairs with 90° elbows for more complex routing.
Every elbow is supplied with EN 10204 3.1 mill test certificates, with 3.2 certification on request.
We export 45° elbows to EPC contractors, refineries and stockists across the Middle East and GCC, Europe and the Americas — to ASME B16.9 for US and Gulf projects, or EN 10253 / DIN dimensions for European specifications, with PED-compliant supply on request.
45° Elbow Specifications
½" NPS to 48" NPS (DN 15 to DN 1200) to ASME B16.9; larger sizes up to 72" NPS manufactured to order to MSS SP-75 or customer drawing
45°, long radius (centreline radius 1.5 × NPS)
SCH 5S, 10S, 40S, 80S, 10 to 160, STD, XS, XXS
ASME B16.9, MSS SP-43, MSS SP-75, EN 10253-1 / 10253-2, DIN 2605, JIS B2311 / B2312 / B2313
Seamless (SMLS) and welded (ERW / EFW / DSAW)
Bevelled ends for butt welding to ASME B16.25
EN 10204 3.1 mill test certificate as standard; EN 10204 3.2 on request
Materials & Grades
We supply 45° elbows in the following materials and grades. All grades are supplied with EN 10204 3.1 / 3.2 Mill Test Certificates.
Stainless Steel 45° Elbows
Stainless steel buttweld fittings deliver excellent corrosion resistance and are essential in chemical, pharmaceutical, food processing, and marine environments. All grades supplied to ASTM A403 specification.
(ASTM A403 WP304 / WP304L) General corrosion resistance; food, dairy, and chemical service
(ASTM A403 WP316 / WP316L) Enhanced chloride and acid resistance; pharmaceutical, marine, and chemical processing
(ASTM A403 WP316H) Elevated-temperature creep strength for high-temperature process service
(ASTM A403 WP317 / WP317L) Higher molybdenum content; superior corrosion resistance in concentrated acid service
(ASTM A403 WP321) Titanium-stabilised; resists sensitisation at sustained elevated temperatures
(ASTM A403 WP347) Columbium-stabilised; ideal for heat exchangers and high-temperature piping
High-alloy austenitic; superior resistance to hot concentrated sulfuric and phosphoric acids
Duplex & Super Duplex Stainless Steel 45° Elbows
Duplex and super duplex grades offer approximately twice the yield strength of standard austenitic stainless steel, combined with excellent resistance to stress corrosion cracking and pitting — ideal for offshore, subsea, and chemical processing environments.
(UNS S31803 / S32205) Offshore topsides, chemical plant, desalination, and seawater piping
(UNS S32750) Seawater systems, subsea equipment, FPSOs, and high-chloride offshore environments
(UNS S32760) High-temperature, high-chloride offshore and subsea service applications
Nickel Alloy 45° Elbows
For the most aggressive corrosive environments — concentrated acids, caustic solutions, sour gas service, and extreme temperatures — we offer buttweld fittings in a full range of nickel alloys.
(UNS N06600) High-temperature oxidation and carburisation resistance
(UNS N06625) Outstanding broad-spectrum corrosion resistance; offshore, chemical, and subsea service
(UNS N08825) Resistance to phosphoric and sulfuric acids; FGD systems and chemical plant
(UNS N10276) Universal corrosion resistance across the widest range of aggressive process media
(UNS N06022) Superior resistance to oxidising and reducing acids and pitting attack
(UNS N04400) Suitable for seawater, hydrofluoric acid, and marine and alkali service
(UNS N08020) Engineered for sulfuric acid and aggressive chemical process service
Exceptional corrosion resistance in seawater and oxidising media at low density
(C70600 / C71500) Preferred for marine seawater piping and naval condenser systems
Carbon Steel 45° Elbows
Carbon steel is the most widely specified material for general-purpose, hydrocarbon, and elevated-temperature service. The primary grade is ASTM A234 WPB for standard service. For high-yield pipeline fittings, we supply ASTM A860 WPHY grades to MSS SP-75.
Standard carbon steel; primary grade for general-purpose process piping buttweld fittings
Impact-tested carbon steel for low-temperature service down to -46°C (-50°F); LNG and cryogenic piping
High-yield pipeline fittings to MSS SP-75; used in high-pressure oil, gas, and liquid transmission pipelines
Alloy Steel 45° Elbows
Chromium-molybdenum alloy steel buttweld fittings are specified for high-temperature, high-pressure service in power generation, petrochemical, and refinery applications. All grades supplied to ASTM A234 specification.
(5% Cr · ½% Mo) Refinery high-temperature service; hydrotreating and catalytic reforming units
(9% Cr · 1% Mo) High-temperature hydrogen-rich process service and steam piping
(1¼% Cr · ½% Mo) Thermal power plant steam, feedwater, and reheat piping
(2¼% Cr · 1% Mo) Reactors and high-temperature pressure piping systems in petrochemical plants
(9% Cr · 1% Mo · V · Nb) Ultra-supercritical steam power plant main steam and hot reheat piping
Why Use a 45° Elbow?
Not every change of direction needs a full right angle. A 45° elbow lets a line step sideways or up and down with a much smaller disturbance to the flow than a 90° long radius elbow. Its centre-to-end dimension is short — about 64 mm for a 4" elbow — so it fits neatly into most layouts.
- Offsets — two 45° elbows step a line sideways around a column, beam or other pipe.
- Lower pressure drop — less turbulence than a 90° turn, useful in long or high-flow lines.
- Drain and vent slopes — 45° runs help gravity drainage and avoid low points.
- Branch connections — combined with a lateral tee for a smooth 45° branch.
Specifying a 45° Elbow
Give the size, the wall thickness or schedule of the connecting pipe, the material grade and whether seamless or welded construction is required. For example: 6" SCH 40 45° LR elbow, ASTM A234 WPB, seamless. Elbows to EN 10253 or DIN 2605 are specified by outside diameter and wall thickness in millimetres.
Other Angles
Standard buttweld elbows are made in 45° and 90°. Where a tighter 90° turn is needed, a 90° short radius elbow can be used. Elbows for other angles can be cut from 90° elbows or supplied to order.
Applications & Industries
- Process piping offsets in refineries, petrochemical and gas plants
- Slurry, solids-handling and high-velocity lines where low turbulence matters
- Drain, vent and flare headers sloped for drainage
- Power plant steam and water piping
- Offshore and seawater systems in duplex and super duplex
- Water transmission and treatment pipelines
Because 45° elbows are used so widely for offsets, they are among the most frequently stocked buttweld fittings on maintenance and shutdown projects, and are often ordered together with 90° elbows of the same size, schedule and grade.
Explore the full range of buttweld fittings.
Testing, Inspection, Marking & Packing
45° elbows are made under our quality assurance process:
- Incoming material verification with PMI testing
- Chemical and mechanical testing to ASTM A403, A234, A420, A860 or the applicable nickel alloy specification
- Heat treatment as required, with pickling and passivation for stainless steels
- Radiographic or ultrasonic examination of the weld seam on welded elbows
- Dimensional inspection of centre-to-end, angle, outside diameter, wall thickness and bevel
- Marking with grade, size, schedule and heat number
Supplied with EN 10204 3.1 mill test certificates; EN 10204 3.2 certificates and third-party inspection are available on request.
Fittings are packed for export with plastic end caps protecting the bevels, rust-preventive or VCI wrapping on carbon and alloy steel, and seaworthy wooden cases; marking, tagging and packing to your specification are available on request.
Why Choose Raaj Fittings for 45° Elbows?
Raaj Sagar Steels has supplied piping components since 2003 and today manufactures buttweld fittings at two plants in India for buyers in the Middle East, Europe and the Americas.
- Manufactured in-house — 45° elbows are made in our own plants, so material, dimensions and delivery stay under our control.
- Ready stock, short lead times — common sizes and grades are held in stock for prompt dispatch; other sizes, grades and specials are manufactured to order.
- Certified quality — ISO 9001:2015, ISO 14001:2015 and ISO 45001:2018 certified; PED 2014/68/EU and IBR supply available, and NACE MR0175 / ISO 15156 material on request.
- 100% material verification — PMI testing on incoming material and EN 10204 3.1 mill test certificates with every order; 3.2 certificates on request.
- Third-party inspection ready — we regularly work with SGS, Bureau Veritas, TÜV and DNV.
- Export documentation — MTCs, certificates of origin, packing lists and inspection reports to suit projects in the GCC, Europe and the Americas.
- Export packing — seaworthy packing with end and face protection, and packing to your specification on request.
- Fast response — our team replies to enquiries within one business day.
45° Elbows — FAQs
A 45° elbow changes pipe direction by 45°. It is used to offset lines around obstructions, to slope drain and vent lines, and wherever a gentler turn than 90° gives lower pressure drop.
ASME B16.9 45° elbows are long radius, with a centreline radius of 1.5 times the nominal pipe size.
It is much shorter than a 90° elbow — for example about 35 mm for a 2" elbow and 64 mm for a 4" elbow. Exact values are tabulated in ASME B16.9.
It is possible on site, but a factory-made 45° elbow has correct dimensions, bevelled ends and full material traceability, and is normally required by piping specifications.
Stainless steel (ASTM A403), carbon steel (A234 WPB, A420 WPL6, A860 WPHY), alloy steel (A234 WP5 to WP91), duplex, super duplex and nickel alloys.
Yes. We supply 45° elbows for projects under the European Pressure Equipment Directive (PED 2014/68/EU), and with IBR certification for Indian boiler applications. NACE MR0175 / ISO 15156 compliant material is also available on request for sour service in the Middle East and the Americas.
