45° Elbow, Buttweld LR & SR 45 Degree Elbow Manufacturer, ASME B16.9

Short & Long Radius 45 Degree Elbow Fittings: ASME/ANSI B16.9, B16.28, MSS-SP-43

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BW 45° Elbow Specifications

Dimensions:
ASME/ANSI B16.9, ASME B16.28, MSS-SP-43.
Size:
1/2"NB TO 48"NB IN.
Type:
Seamless and Welded.
Thickness:
Schedule 5S, 10S, 20S, S10, S20, S30, STD, 40S, S40, S60, XS, 80S, S80, S100, S120, S140, S160, XXS.
Form:
45 Degree Elbow, Long Radius Elbow -LR Elbow, Short Radius Elbow -SR Elbow
Materials:
Stainless Steel, Carbon Steel, Alloy Steel, Super Duplex, Duplex Steel, High Nickel Alloys, Copper Nickel.

ISO Certified manufacturer of Buttweld 45 Degree Elbow Fittings, EN 10204 / 3.1B certified Short and Long Radius 45° Elbow - Seamless 1/2″～24″ Inch and ERW, Welded, Fabricated 1/2″～48″ Inch.

A buttweld 45-degree elbow is a pivotal component in piping systems, facilitating smooth directional changes in the flow of fluids with minimal turbulence and pressure loss. These elbows come in two main configurations: short radius (SR) and long radius (LR). The SR 45-degree elbow, with a center-to-end distance equal to the nominal pipe diameter, is suitable for tight spaces where installation flexibility is paramount. Conversely, the LR 45-degree elbow, with a center-to-end distance of 1.5 times the nominal pipe diameter, is ideal for systems where smoother flow and reduced pressure drop are crucial. Fabricated from materials such as stainless steel, carbon steel, alloy steel, super duplex, duplex steel, high nickel alloys, and copper nickel, these elbows are designed to meet the demands of various industrial applications.

The manufacturing process for these elbows ensures precision and durability. Seamless elbows are available in sizes ranging from 1/2″ to 24″, while ERW, welded, and fabricated elbows can be produced in sizes up to 48″. The wall thickness of these elbows varies from 3mm to 40mm, accommodating a wide range of schedules such as SCH5, SCH10, SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, and XXS. This versatility allows the elbows to withstand different pressure and temperature conditions, making them suitable for high-performance applications in industries such as oil and gas, petrochemicals, power generation, and water treatment. The smooth internal surface of these elbows reduces frictional resistance, enhancing flow efficiency and reducing energy consumption.

To further enhance their performance and longevity, buttweld 45-degree elbows can be treated with several value-added services. Hot-dipped galvanizing provides a robust protective layer against corrosion, while epoxy and FBE coatings offer additional chemical resistance. Electro-polishing creates a smooth, contaminant-free surface, ideal for hygienic applications. Sand blasting prepares the surface for further finishing processes, ensuring optimal adhesion of coatings. Additionally, threading and soldering options are available for specific installation requirements. Compliance with standards like ANSI B16.9, ANSI B16.28, MSS-SP-43, EN10253-1, EN10253-2, DIN2605, DIN2615, DIN2616, DIN2617, and DIN28011 ensures that these elbows meet rigorous quality and safety benchmarks. Each elbow is accompanied by comprehensive test certificates, including manufacturer test certificates per EN 10204 / 3.1B, raw materials certificates, 100% radiography test reports, and third-party inspection reports, guaranteeing their reliability and performance in demanding environments.

The advantages of using a 45-degree elbow include improved flow dynamics by reducing the number of sharp turns in the piping system, which minimizes pressure loss and turbulence. This not only enhances the efficiency of the system but also prolongs the life of the piping by reducing the stress on the system components. Additionally, the versatility in material and size options makes these elbows adaptable to various operational conditions and requirements. Their applications are widespread across industries such as chemical processing, oil and gas, marine, pharmaceutical, and food and beverage industries, where they play a critical role in ensuring the smooth and efficient transportation of fluids and gases. The features that distinguish these elbows include their precision-engineered design, high mechanical strength, and resistance to extreme temperatures and pressures, making them indispensable in high-stakes environments.

ASME B16.9 45 Deg Elbow Dimensions

ASME B16.9 45 Degree Elbow LR/SR Dimensions

NPS	O.D. D	45° LR B	45° 3D B
1/2	21.3	16
3/4	26.7	19	24
1	33.4	22	31
1.1/4	42.2	25	39
1.1/2	48.3	29	47
2	60.3	35	63
2.1/2	73	44	79
3	88.9	51	95
3.1/2	101.6	57	111
4	114.3	64	127
5	141.3	79	157
6	168.3	95	189
8	219.1	127	252
10	273	159	316
12	323.8	190	378
14	355.6	222	441
16	406.4	254	505
18	457	286	568
20	508	318	632
22	559	343	694
24	610	381	757
26	660	406	821
28	711	438	883
30	762	470	946
32	813	502	1010
34	864	533	1073
36	914	565	1135
38	965	600	1200
40	1016	632	1264
42	1067	660	1326
44	1118	695	1389
46	1168	727	1453
48	1219	759	1516

Note: Wall thickness (t) must be specified by customer. Dimensions are in millimeters unless otherwise indicated. B are Center to End dimensions.

Dimensional Tolerances of ASME B16.9 45deg Elbow

Nominal Pipe Size	1/2 to 2.1/2	3 to 3.1/2	4	5 to 8
Outside Diameter at Bevel (D)	+ 1.6 - 0.8	1.6	1.6	+ 2.4 - 1.6
Inside Diameter at End	0.8	1.6	1.6	1.6
Center to End LR (A/B)	2	2	2	2
Center to End 3D (A/B)	3	3	3	3
Nominal Pipe Size	10 to 18	20 to 24	26 to 30	32 to 48
Outside Diameter at Bevel (D)	+ 4 - 3.2	+ 6.4 - 4.8	+ 6.4 - 4.8	+ 6.4 - 4.8
Inside Diameter at End	3.2	4.8	+ 6.4 - 4.8	+ 6.4 - 4.8
Center to End LR (A/B)	2	2	3	5
Center to End 3D (A/B)	3	3	6	6
Wall Thickness (t)	Not less than 87.5% of Nominal Wall Thickness

A 45-degree elbow is a pipe fitting that changes the direction of flow by 45 degrees. It comes in two types:

Long Radius (LR): The centerline radius is 1.5 times the pipe diameter—used for smoother flow.

Short Radius (SR): The centerline radius is equal to the pipe diameter—used where space is limited.

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