OEM manufacturer ASME B16.9 · ASME B16.25
90° Butt Weld Elbows — Long Radius & Short Radius, ASME B16.9
A 90° butt weld elbow turns a pipeline through a right angle and is welded directly to the pipe. Teshi Group manufactures long radius and short radius 90° elbows to ASME B16.9 in carbon, low-temperature, alloy and stainless steels, with wall thickness matched to your pipe schedule.
Also called: 90 degree elbow, 90° LR elbow, 90° SR elbow, long radius elbow, short radius elbow, buttweld bend 90
What is a 90° Butt Weld Elbow?
A 90° butt weld elbow is a wrought fitting with bevelled ends that changes flow direction by 90°. Long radius (LR) elbows have a centre-to-end radius of 1.5 × NPS and are the default choice because they give lower pressure drop and smoother flow. Short radius (SR) elbows have a radius of 1.0 × NPS and are used where space is tight. Both are full-penetration welded to the pipe, so the joint is as strong as the line and leak paths are eliminated.
Key features
- Long radius (1.5D) and short radius (1D) patterns per ASME B16.9
- Wall thickness matches the pipe schedule, so the elbow carries the same rating as the pipe
- Seamless or welded construction as required by the grade designation
- Ends bevelled to ASME B16.25 for full-penetration welds
- Reducing 90° LR elbows available on request
Specification
| Supply | OEM manufacturer — Teshi Group, India |
|---|---|
| Standard | ASME B16.9 (LR and SR 90° elbows) |
| Radius | LR = 1.5 × NPS; SR = 1.0 × NPS |
| 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
- Process piping in refineries and petrochemical plants
- Steam and feedwater lines in power plants (IBR when specified)
- Cooling water and utility headers
- Pump suction and discharge piping
- Pipe racks and skid-mounted packages
Long radius vs short radius elbow
A long radius elbow (1.5D) has lower pressure loss and less erosion, so most piping specifications call for LR as standard. A short radius elbow (1D) saves space and is used where there is no room for LR, such as compact skids or close to equipment nozzles. SR elbows have a lower pressure-drop efficiency and higher stress intensification, so check the piping specification and stress analysis before substituting SR for LR.
Technical data sheets
Dimensions & weights
FAQ
90° Butt Weld Elbow: common questions
What is the difference between LR and SR elbows?
A long radius elbow has a centre-line radius of 1.5 times the nominal pipe size; a short radius elbow has a radius equal to the nominal pipe size. LR is the usual default; SR is used where space is limited.
What pressure rating does a butt weld elbow have?
ASME B16.9 fittings do not have a separate pressure class. A fitting ordered with the same schedule and an equivalent material to the pipe has the same allowable pressure as the straight seamless pipe.
Which material grade should I order for carbon steel pipe?
For ASTM A106 Gr B or API 5L Gr B pipe, ASTM A234 WPB elbows are the usual match. For low-temperature service down to −46 °C, specify ASTM A420 WPL6.
Do you supply 3D or 5D bends?
3D and 5D bends are not covered by ASME B16.9 dimensions. Share the radius, size, schedule and material with your enquiry and we will confirm what we can supply.
How fast can you quote?
Send the size, schedule, long or short radius, material grade, seamless or welded construction and quantity. We quote within 24–48 hours, along with the test and documentation scope.
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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