ASME B16.9 S/R Returns

August 24, 2020

Technical Drawings

Standard drawing of ASME B16.9 short radius returns.

The short-radius (S/R) 180° return of ASME B16.9 has the same function as that of a L/R return except that it makes a much shaper turn than does the L/R return.

Dimensions

NPS inch	O.D mm inch	O mm inch	K mm inch
1	33.4 1.32	51 2.00	41 1.62
1-1/4	42.2 1.66	64 2.50	52 2.06
1-1/2	48.3 1.90	76 3.00	62 2.44
2	60.3 2.38	102 4.00	81 3.19
2-1/2	73.0 2.88	127 5.00	100 3.94
3	88.9 3.50	152 6.00	121 4.75
3-1/2	101.6 4.00	178 7.00	140 5.50
4	114.3 4.50	203 8.00	159 6.25
5	141.3 5.56	254 10.00	197 7.75
6	168.3 6.62	305 10.00	237 9.31
8	219.1 8.62	406 16.00	313 12.31
10	273.0 10.75	508 20.00	391 15.38
12	323.8 12.75	610 24.00	467 18.38
14	355.6 14.00	711 28.00	533 21.00
16	406.4 16.00	813 32.00	610 24.00
18	457.0 18.00	914 36.00	686 27.00
20	508.0 20.00	1016 40.00	762 30.00
22	559.0 22.00	1118 44.00	838 33.00
24	610.0 24.00	1219 48.00	914 36.00

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

Note: (1) Dimension A is equal to one-half of dimension O.

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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