OEM manufacturer ASME B16.9 · ASME B16.25
45° Butt Weld Elbows — Long Radius, ASME B16.9
A 45° butt weld elbow changes the direction of a pipeline by 45° and is welded directly to the pipe. Teshi Group manufactures 45° long radius elbows to ASME B16.9 in carbon, low-temperature, alloy and stainless steels, in the schedule of your pipe.
Also called: 45 degree elbow, 45° LR elbow, buttweld 45 elbow, 45 degree bend
What is a 45° Butt Weld Elbow?
A 45° butt weld elbow is a wrought fitting that turns flow through 45°. ASME B16.9 covers 45° elbows in the long radius pattern, with a bend radius of 1.5 × NPS. Because the change of direction is gentler than a 90° elbow, it gives lower pressure drop and is used for offsets, lateral routing and where piping must step around obstructions. The ends are bevelled for a full-penetration butt weld, so the fitting carries the same rating as the matching pipe.
Key features
- Long radius (1.5D) geometry per ASME B16.9
- Lower pressure drop than a 90° turn
- Wall thickness matched to the pipe schedule
- Seamless or welded construction
- Ends bevelled to ASME B16.25
Specification
| Supply | OEM manufacturer — Teshi Group, India |
|---|---|
| Standard | ASME B16.9 (45° LR elbows) |
| Radius | 1.5 × NPS (long radius) |
| Size range | NPS ½"–48" (DN 15–1200) as covered by ASME B16.9 |
| Wall thickness | Matched to the connecting pipe schedule — Sch 5S, 10S, 40, STD, 80, XS, 160, XXS (ASME B36.10M / B36.19M) |
| Ends | Bevelled for butt welding per ASME B16.25 |
| Materials — carbon steel | ASTM A234 WPB, WPC (seamless and welded WPB-W) |
| Materials — high-yield carbon steel | ASTM A860 WPHY 42, 46, 52, 56, 60, 65, 70 (MSS SP-75) |
| Materials — low-temperature carbon steel | ASTM A420 WPL3, WPL6, WPL8, WPL9 |
| Materials — alloy steel (Cr-Mo) | ASTM A234 WP1, WP5, WP9, WP11 Cl 1 / 2 / 3, WP12 Cl 1 / 2, WP22 Cl 1 / 3, WP91, WP92 |
| Materials — stainless steel | ASTM A403 WP304, WP304L, WP304H, WP309, WP310S, WP316, WP316L, WP316H, WP316Ti, WP317, WP317L, WP321, WP321H, WP347, WP347H (seamless S, welded W / WX) |
| Materials — 904L and 6Mo | 904L (UNS N08904, ASTM A403 / B366); 254 SMO / 6Mo (ASTM A403 WPS31254); AL-6XN (UNS N08367, ASTM B366) |
| Materials — duplex stainless steel | ASTM A815 WPS31803, WPS32205 (2205) |
| Materials — super duplex stainless steel | ASTM A815 WPS32750 (2507), WPS32760, WPS32550 |
| Materials — nickel alloys | ASTM B366: Nickel 200 / 201 (N02200 / N02201), Monel 400 (N04400), Inconel 600 (N06600), Inconel 625 (N06625), Incoloy 800 / 800H / 800HT (N08800 / N08810 / N08811), Incoloy 825 (N08825), Hastelloy C276 (N10276), Hastelloy C22 (N06022), Hastelloy B2 / B3 (N10665 / N10675), Alloy 20 (N08020) |
| Materials — titanium | ASTM B363 WPT1, WPT2, WPT7, WPT12; Grade 5 (Ti-6Al-4V) against order |
| Materials — copper-nickel | Cu-Ni 90/10 (UNS C70600) and 70/30 (UNS C71500), made from ASTM B466 / B467 pipe (EEMUA 146 dimensions on request) |
| Grade availability | Every grade listed is made or supplied against order, with EN 10204 3.1 certificates (3.2 / third-party inspection when specified) and PMI on alloy, stainless, duplex and nickel grades. |
| Testing | Visual and dimensional inspection; PMI on alloy and stainless grades; hardness check; RT, UT, MPI or DPT and IGC tests when specified |
| Documents | EN 10204 3.1 mill test certificate; 3.2 / third-party inspection when the order specifies; dimensional inspection report; IBR certification for boiler/steam service when specified |
Applications
- Pipe offsets on pipe racks
- Slurry and solids-handling lines where gentle turns reduce wear
- Process piping in refineries and chemical plants
- Steam and condensate lines
- Water and firewater networks
Technical data sheets
Dimensions & weights
FAQ
45° Butt Weld Elbow: common questions
Are 45° elbows available in short radius?
ASME B16.9 dimensions cover 45° elbows in the long radius pattern only. If a layout needs a tighter 45° turn, it is usually made by cutting a 90° SR elbow, which should be approved by the piping engineer.
Can two 45° elbows replace one 90° elbow?
Yes, two 45° elbows can form a 90° turn with a longer, gentler path. It adds one weld joint, so it is mostly used where an offset is needed between the two bends.
How is the wall thickness specified?
Order the elbow by pipe schedule or wall thickness, for example Sch 40 or Sch 80. The fitting ends then match the bore and wall of the connecting pipe.
Which certificates come with the elbows?
Each lot is supplied with an EN 10204 3.1 mill test certificate. Third-party inspection to 3.2 and IBR certification are provided when the order specifies them.
Need a size or grade not listed here?
Our engineering team manufactures against your drawing or datasheet, with dimensional sign-off before dispatch.
Send us your specificationTraceability
From mill heat to your site
- 01
Approved mill material
Received against the mill certificate; heat number registered.
- 02
Forging & machining
Heat number carried through every stage in our Indian works.
- 03
PMI, dimensional & NDT
Every lot inspected to the governing standard; TPI witness on request.
- 04
Stamped & certified dispatch
Hard-stamped pieces with EN 10204 3.1 / 3.2 certificates.
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