ASME B16.9 L/R Returns

August 24, 2020

Technical Drawings

Standard drawing of ASME B16.9 long radius returns.

The long-radius (L/R) 180° returns manufactured in accordance of ASME B16.9 can convert the fluid flow to the parallel but opposite direction. It looks like a half-cut of a circular ring. Usually, the L/R return is also called “180° L/R bend”.

Dimensions

NPS inch	O.D mm inch	O mm inch	K mm inch
1/2	21.3 0.84	76 3.00	48 1.88
3/4	26.7 1.05	76 3.00	51 2.00
1	33.4 1.32	76 3.00	56 2.19
1-1/4	42.2 1.66	95 3.75	70 2.75
1-1/2	48.3 1.90	114 4.50	83 3.25
2	60.3 2.38	152 6.00	106 4.19
2-1/2	73.0 2.88	190 7.50	132 5.19
3	88.9 3.50	229 9.00	159 6.25
3-1/2	101.6 4.00	267 10.50	184 7.25
4	114.3 4.50	305 12.00	210 8.25
5	141.3 5.56	381 15.00	262 10.31
6	168.3 6.62	457 18.00	313 12.31
8	219.1 8.62	610.0 24.00	414 16.31
10	273.0 10.75	762 30.00	518 20.38
12	323.8 12.75	914 36.00	619 24.38
14	355.6 14.00	1067 42.00	711 28.00
16	406.4 16.00	1219 48.00	813 32.00
18	457.0 18.00	1372 54.00	914 36.00
20	508.0 20.00	1524 60.00	1016 40.00
22	559.0 22.00	1676 66.00	1118 44.00
24	610.0 24.00	1829 72.00	1219 48.00

*NPS: Nominal Pipe Size; O.D: Outside Diameter at Bevel; O: Center-to-Center; K: Back-to-face.

ASME B16.9 Butt Welding Fittings
Elbow L/R	Reducing Elbow	Return L/R
Elbow S/R	Return S/R	3D Elbow
Tee & Cross	Reducing Tee	Reducing Cross
Stub End	Cap	Reducer
End Bevel	Tolerance	Wall Thickness

*Click to view dimensions of other ASME B16.9 standard fittings.

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