Pipe Stub End Dimensions in mm as per ASME B16.9

During the inspection of the stub end dimensions, you have to check for the following things;

Refer to the table given below for the Stub end dimensions as per ASME B16.9

Stub End Dimensions

NOMINAL PIPE SIZE	LAP DIAMETER	OUTSIDE DIAMETER		LONG PATTERN LENGTH	SHORT PATTERN LENGTH	RADIUS
Inch.	A	OD Min	OD Max	L	L	R
1/2	35	22.8	20.5	76	51	3
3/4	43	28.1	25.9	76	51	3
1	51	35	32.6	102	51	3
1 1/4	64	43.6	41.4	102	51	5
1 1/2	73	49.9	47.5	102	51	6
2	92	62.4	59.5	152	64	8
2 1/2	105	75.3	72.2	152	64	8
3	127	91.3	88.1	152	64	10
3 1/2	140	104	100.8	152	76	10
4	157	116.7	113.5	152	76	11
5	186	144.3	140.5	203	76	11
6	216	171.3	167.5	203	89	13
8	270	222.1	218.3	203	102	13
10	324	277.2	272.3	254	127	13
12	381	328	323.1	254	152	13
14	413	359.9	354.8	305	152	13
16	470	411	405.6	305	152	13
18	533	462	456	305	152	13
20	584	514	507	305	152	13
22	641	565	558	305	152	13
24	692	616	609	305	152	13

All dimensions are in mm.

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NOMINAL PIPE SIZE	ALL FITTINGS	ALL FITTINGS	ALL FITTINGS	ELBOWS AND TEES	180 DEG RETURN BENDS	180 DEG RETURN BENDS	180 DEG RETURN BENDS	REDUCERS	CAPS
NPS	O.D. at Bevel (1), (2)	I.D. at End (1), (3), (4)	Wall Thickness (3)	Centre-to-End Dimension A,B,C,M	Centre-to-Centre O	Back-to-Face K	Alignment of Ends U	Overall Length H	Overall Length E
½ to 2½	0.06 -0.03	0.03	Not less than 87.5% of nominal thickness	0.06	0.25	0.25	0.03	0.06	0.12
3 to 3 ½	0.06	0.06		0.06	0.25	0.25	0.03	0.06	0.12
4	0.06	0.06		0.06	0.25	0.25	0.03	0.06	0.12
5 to 8	0.09 -0.06	0.06		0.06	0.25	0.25	0.03	0.06	0.25
10 to 18	0.16 -0.12	0.12		0.09	0.38	0.25	0.06	0.09	0.25
20 to 24	0.25 -0.19	0.19		0.09	0.38	0.25	0.06	0.09	0.25
26 to 30	0.25 -0.19	0.19		0.12	…	…	…	0.19	0.38
32 to 48	0.25 -0.19	0.19		0.19	…	…	…	0.19	0.38

NOMINAL PIPE SIZE NPS	ANGULARITY TOLERANCES	ANGULARITY TOLERANCES	ALL DIMENSIONS ARE GIVEN IN INCHES. TOLERANCES ARE EQUAL PLUS AND MINUS EXCEPT AS NOTED.
	Off Angle Q	Off Plane P	(1) Out-of-round is the sum of absolute values of plus and minus tolerance. (2) This tolerance may not apply in localized areas of formed fittings where increased wall thickness is required to meet design requirements of ASME B16.9. (3) The inside diameter and the nominal wall thicknesses at ends are to be specified by the purchaser. (4) Unless otherwise specified by the purchaser, these tolerances apply to the nominal inside diameter, which equals the difference between the nominal outside diameter and twice the nominal wall thickness.
½ to 4	0.03	0.06
5 to 8	0.06	0.12
10 to 12	0.09	0.19
14 to 16	0.09	0.25
18 to 24	0.12	0.38
26 to 30	0.19	0.38
32 to 42	0.19	0.50
44 to 48	0.18	0.75

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