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Socket Weld Flange Dimensions (ASME B16.5)

Author: Projectmaterials
Posted: September 20, 2017
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The charts show the dimensions of socket weld flange class 150, 300, 400, 900, 1500, 2500 in inches and in millimeters.

SOCKET WELD FLANGE DIMENSIONS IN INCHES

SOCKET WELD CLASS 150 (IN INCH)

Dimensions of socket weld flange class 150 (in inches)

NPS	ID	OD	Bolt Circle (BC)	Raised Face (R)	Raised Face (RF)	H	D	ID 2*	Raised Face Thickness (T)	T1	Flat Face Thickness (T2)	Bolt Hole (B)	No. of Bolt Holes
1/2″	0.88″	3.50″	2.38″	1.38″	.063″	1.19″	.38″	0.62″	.62″	.38″	.56″	.62″	4
3/4″	1.09″	3.88″	2.75″	1.69″	.063″	1.50″	.44″	0.82″	.62″	.44″	.56″	.62″	4
1″	1.36″	4.25″	3.12″	2.00″	.063″	1.94″	.50″	1.05″	.69″	.50″	.63″	.62″	4
1-1/4″	1.70″	4.62″	3.50″	2.50″	.063″	2.31″	.56″	1.38″	.81″	.56″	.75″	.62″	4
1-1/2″	1.97″	5.00″	3.88″	2.88″	.063″	2.56″	.62″	1.61″	.88″	.62″	.82″	.62″	4
2″	2.44″	6.00″	4.75″	3.62″	.063″	3.06″	.69″	2.07″	1.00″	.69″	.94″	.75″	4
2-1/2″	2.94″	7.00″	5.50″	4.12″	.063″	3.56″	.75″	2.47″	1.12″	.82″	1.06″	.75″	4
3″	3.57″	7.50″	6.00″	5.00″	.063″	4.25″	.81″	3.07″	1.19″	.88″	1.13″	.75″	4
3-1/2″	4.07″	8.50″	7.00″	5.50″	.063″	4.81″	.88″	3.55″	1.25″	.88″	1.19″	.75″	8
4″	4.57″	9.00″	7.50″	6.19″	.063″	5.31″	.94″	4.03″	1.31″	.88″	1.25″	.75″	8
5″	5.66″	10.00″	8.50″	7.31″	.063″	6.44″	.94″	5.05″	1.44″	.88″	1.38″	.88″	8
6″	6.72″	11.00″	9.50″	8.50″	.063″	7.56″	1.06″	6.07″	1.56″	.94″	1.50″	.88″	8
8″	8.72″	13.50″	11.75″	10.62″	.063″	9.69″	1.25″	7.98″	1.75″	1.06″	1.69″	.88″	8
10″	10.88″	16.00″	14.25″	12.75″	.063″	12.00″	1.31″	10.02″	1.94″	1.13″	1.88″	1.00″	12
12″	12.88″	19.00″	17.00″	15.00″	.063″	14.38″	1.56″	12.00″	2.19″	1.19″	2.13″	1.00″	12
14″	14.14″	21.00″	18.75″	16.25″	.063″	15.75″	1.63″	13.25″	2.25″	1.32″	2.19″	1.12″	12
16″	16.16″	23.50″	21.25″	18.50″	.063″	18.00″	1.75″	15.25″	2.50″	1.38″	2.44″	1.12″	16
18″	18.18″	25.00″	22.75″	21.00″	.063″	19.88″	1.94″	17.25″	2.69″	1.50″	2.63″	1.25″	16
20″	20.20″	27.50″	25.00″	23.00″	.063″	22.00″	2.13″	19.25″	2.88″	1.63″	2.83″	1.25″	20
22″	22.22″	29.50″	27.25″	25.25″	.063″	24.25″	2.38″	21.25″	3.13″	1.75″	3.07″	1.38″	20
24″	24.25″	32.00″	29.50″	27.25″	.063″	26.12″	2.50″	23.25″	3.25″	1.82″	3.19″	1.38″	20

SOCKET WELD CLASS 300 (IN INCH)

Dimensions of socket weld flange class 300 (in inches)

FLANGE NPS	Inside Diameter	Outside Diameter	Bolt Circle (BC)	Raised Face (R)	Raised Face (RF)	H	D	ID 2*	Raised Face Thickness (T)	T1	Flat Face Thickness (T2)	Bolt Hole (B)	No. of Bolt Holes
1/2″	0.88″	3.75″	2.62″	1.38″	.063″	1.50″	.38″	0.62″	0.88″	0.50″	0.82″	0.62″	4
3/4″	1.09″	4.62″	3.25″	1.69″	.063″	1.88″	.44″	0.82″	1.00″	.056″	0.94″	0.75″	4
1″	1.36″	4.88″	3.50″	2.00″	.063″	2.12″	.50″	1.05″	1.06″	0.63″	1.00″	0.75″	4
1-1/4″	1.70″	5.25″	3.88″	2.50″	.063″	2.50″	.56″	1.38″	1.06″	0.69″	1.00″	0.75″	4
1-1/2″	1.97″	6.12″	4.50″	2.88″	.063″	2.75″	.62″	1.61″	1.19″	0.75″	1.13″	0.88″	4
2″	2.44″	6.50″	5.00″	3.62″	.063″	3.31″	.69″	2.07″	1.31″	0.82″	1.25″	0.75″	8
2-1/2″	2.94″	7.50″	5.88″	4.12″	.063″	3.94″	.75″	2.47″	1.50″	0.94″	1.44″	0.88″	8
3″	3.57″	8.25″	6.62″	5.00″	.063″	4.62″	.81″	3.07″	1.69″	1.06″	1.63″	0.88″	8

SOCKET WELD CLASS 600 (IN INCH)

Dimensions of socket weld flanges class 600 (in inches)

FLANGE NPS	ID	OD	Bolt Circle (BC)	Raised Face (R)	Raised Face (RF)	H	D	ID 2*	Raised Face Thickness (T)	T1	Flat Face Thickness (T2)	Bolt Hole (B)	No. of Bolt Holes
1/2″	0.88″	3.75″	2.62″	1.38″	.250″	1.50″	.38″	0.55″	1.13″	0.56″	0.88″	0.62″	4
3/4″	1.09″	4.62″	3.25″	1.69″	.250″	1.88″	.44″	0.74″	1.25″	0.62″	1.00″	0.75″	4
1″	1.36″	4.88″	3.50″	2.00″	.250″	2.12″	.50″	0.96″	1.31″	0.69″	1.06″	0.75″	4
1-1/4″	1.70″	5.25″	3.88″	2.50″	.250″	2.50″	.56″	1.28″	1.37″	0.81″	1.12″	0.75″	4
1-1/2″	1.97″	6.12″	4.50″	2.88″	.250″	2.75″	.62″	1.50″	1.50″	0.88″	1.25″	0.88″	4
2″	2.44″	6.50″	5.00″	3.62″	.250″	3.31″	.69″	1.94″	1.69″	1.00″	1.44″	0.75″	8
2-1/2″	2.94″	7.50″	5.88″	4.12″	.250″	3.94″	.75″	2.32″	1.87″	1.12″	1.62″	0.88″	8
3″	3.57″	8.25″	6.62″	5.00″	.250″	4.62″	.81″	2.90″	2.06″	1.25″	1.81″	0.88″	8

SOCKET WELD CLASS 1500 (IN INCH)

Dimensions of socket weld flange class 1500 (in inches)

FLANGE NPS	Inside Diameter	Outside Diameter	Bolt Circle (BC)	Raised Face (R)	Raised Face (RF)	H	D	ID 2*	Raised Face Thickness (T)	T1	Flat Face Thickness (T2)	Bolt Hole (B)	No. of Bolt Holes
1/2″	0.88″	4.75″	3.25″	1.38″	.250″	1.50″	.38″	0.55″	1.50″	0.88″	1.25″	0.88″	4
3/4″	1.09″	5.13″	3.50″	1.69″	.250″	1.75″	.44″	0.74″	1.63″	1.00″	1.38″	0.88″	4
1″	1.36″	5.88″	4.00″	2.00″	.250″	2.06″	.50″	0.96″	1.88″	1.13″	1.63″	1.00″	4
1-1/4″	1.70″	6.25″	4.38″	2.50″	.250″	2.50″	.56″	1.28″	1.88″	1.13″	1.63″	1.00″	4
1-1/2″	1.97″	7.00″	4.88″	2.88″	.250″	2.75″	.62″	1.50″	2.00″	1.25″	1.75″	1.13″	4
2″	2.44″	8.50″	6.50″	3.63″	.250″	4.13″	.69″	1.94″	2.50″	1.50″	2.25″	1.00″	8
2-1/2″	2.94″	9.63″	7.50″	4.13″	.250″	4.88″	.75″	2.32″	2.75″	1.63″	2.50″	1.13″	8

SOCKET WELD FLANGE DIMENSIONS IN MILLIMETERS

SOCKET WELD CLASS 150 (IN MM)

Socket weld flange dimensions class 150 in millimeters (ASME B16.5)

Size inch	D mm	X mm	G mm	t mm	B1 mm	B2 mm	T2 mm	Y mm
1/2	89	30.2	35.1	11.2	15.7	22.4	15.7	9.7
3/4	99	38.1	42.9	12.7	20.8	27.7	15.7	11.2
1	108	49.3	50.8	14.2	26.7	34.5	17.5	12.7
1¼	117	58.7	63.5	15.7	35.1	43.2	20.6	14.2
1½	127	65.0	73.2	17.5	40.9	49.5	22.4	15.7
2	152	77.7	91.9	19.1	52.6	62.0	25.4	17.5
2½	178	90.4	104.6	22.4	62.7	74.7	28.4	19.1
3	191	108.0	127.0	23.9	78.0	90.7	30.2	20.6
3½	216	122.2	139.7	23.9	90.2	103.4	31.8	22.4
4	229	134.9	157.2	23.9	102.4	116.1	33.3	23.9
5	254	163.6	185.7	23.9	128.3	143.8	36.6	23.9
6	279	192.0	215.9	25.4	154.2	170.7	39.6	26.9
8	343	246.1	269.7	28.4	202.7	221.5	44.5	31.8
10	406	304.8	323.9	30.2	254.5	276.4	49.3	33.3
12	483	365.3	381.0	31.8	304.8	327.2	55.6	39.6
14	533	400.1	412.8	35.1	336.6	359.2	57.2	41.4
16	597	457.2	469.9	36.6	387.4	410.5	63.5	44.5
18	635	505.0	533.4	39.6	438.2	461.8	68.3	49.3
20	699	558.8	584.2	42.9	489.0	513.1	73.2	54.1
24	813	663.4	692.2	47.8	590.6	616.0	82.6	63.5

Size	Drilling			Bolting
inch	Bolt circle Diameter mm	Holes #	Holes Dia. mm	Bolt Dia. inch.	Length FF Flange	Length RF Flange	Length RTJ Flange
1/2	60.5	4	15.7	1/2	50.8	57.2	–
3/4	69.9	4	15.7	1/2	50.8	63.5	–
1	79.2	4	15.7	1/2	57.2	63.5	76.2
1¼	88.9	4	15.7	1/2	57.2	69.9	82.6
1½	98.6	4	15.7	1/2	63.5	69.9	82.6
2	120.7	4	19.1	5/8	69.9	82.6	95.3
2½	139.7	4	19.1	5/8	76.2	88.9	101.6
3	152.4	4	19.1	5/8	76.2	88.9	101.6
3½	177.8	8	19.1	5/8	76.2	88.9	101.6
4	190.5	8	19.1	5/8	76.2	88.9	101.6
5	215.9	8	22.4	3/4	82.6	95.3	108.0
6	241.3	8	22.4	3/4	82.6	101.6	114.3
8	298.5	8	22.4	3/4	88.9	108.0	120.7
10	362.0	12	25.4	7/8	101.6	114.3	127.0
12	431.8	12	25.4	7/8	101.6	120.7	133.4
14	476.3	12	28.4	1	114.3	133.4	146.1
16	539.8	16	28.4	1	114.3	133.4	146.1
18	577.9	16	31.8	1^1/8	127.0	146.1	158.8
20	635.0	20	31.8	1^1/8	139.7	158.8	171.5
24	749.3	20	35.1	1¼	152.4	171.5	184.2

SOCKET WELD CLASS 300 (IN MM)

Socket weld flange dimensions class 300 in millimeters (ASME B16.5)

Size inch	D mm	X mm	G mm	t mm	B1 mm	B2 mm	T2 mm	Y mm
1/2	95	38.1	35.1	14.2	15.7	22.4	22.4	9.7
3/4	117	47.8	42.9	15.7	20.8	27.7	25.4	11.2
1	124	53.8	50.8	17.5	26.7	34.5	26.9	12.7
1¼	133	63.5	63.5	19.1	35.1	43.2	26.9	14.2
1½	155	69.9	73.2	20.6	40.9	49.5	30.2	15.7
2	165	84.1	91.9	22.4	52.6	62.0	33.3	17.5
2½	191	100.1	104.6	25.4	62.7	74.7	38.1	19.1
3	210	117.3	127.0	28.4	78.0	90.7	42.9	20.6
3½	229	133.4	139.7	30.2	90.2	103.4	44.5	22.4
4	254	146.1	157.2	31.8	102.4	116.1	47.8	23.9
5	279	177.8	185.7	35.1	128.3	143.8	50.8	23.9
6	318	206.2	215.9	36.6	154.2	170.7	52.3	26.9
8	381	260.4	269.7	41.1	202.7	221.5	62.0	31.8
10	445	320.5	323.9	47.8	254.5	276.4	66.5	33.3
12	521	374.7	381.0	50.8	304.8	327.2	73.2	39.6
14	584	425.5	412.8	63.8	336.6	359.2	76.2	41.4
16	648	482.6	469.9	57.2	387.4	410.5	82.6	44.5
18	711	533.4	533.4	60.5	438.2	461.8	88.9	49.3
20	775	587.2	584.2	63.5	489.0	513.1	95.3	54.1
24	914	701.5	692.2	69.9	590.6	616.0	106.4	63.5

Size	Drilling			Bolting
inch	Bolt circle Diameter mm	Holes #	Holes Dia. mm	Bolt Dia. inch.	Length FF Flange	Length RF Flange	Length RTJ Flange
1/2	66.5	4	15.7	1/2	57.2	63.5	76.2
3/4	82.6	4	19.1	5/8	63.5	76.2	88.9
1	88.9	4	19.1	5/8	63.5	76.2	88.9
1¼	98.6	4	19.1	5/8	69.9	82.6	95.3
1½	114.3	4	22.4	3/4	76.2	88.9	101.6
2	127.0	8	19.1	5/8	76.2	88.9	101.6
2½	149.4	8	22.4	3/4	82.6	101.6	114.3
3	168.1	8	22.4	3/4	88.9	108.0	120.7
3½	184.2	8	22.4	3/4	95.3	108.0	127.0
4	200.2	8	22.4	3/4	95.3	114.3	127.0
5	235.0	8	22.4	3/4	108.0	120.7	133.4
6	269.7	12	22.4	3/4	108.0	120.7	139.7
8	330.2	12	25.4	7/8	120.7	139.7	152.4
10	387.4	16	28.4	1	139.7	158.8	171.5
12	450.9	16	31.8	1^1/8	146.1	171.5	184.2
14	514.4	20	31.8	1^1/8	158.8	177.8	190.5
16	571.5	20	35.1	1¼	165.1	190.5	203.2
18	628.7	24	35.1	1¼	171.5	196.9	209.6
20	685.8	24	35.1	1¼	184.2	203.2	222.3
24	812.8	24	41.1	1½	203.2	228.6	254.0

SOCKET WELD CLASS 600 (IN MM)

Socket weld flange dimensions class 600 in millimeters (ASME B16.5)

Size inch	D mm	X mm	G mm	t mm	B1 mm	B2 mm	T2 mm	Y mm
1/2	95	38.1	35.1	14.2	B36.10/.19	22.4	22.4	9.7
3/4	117	47.8	42.9	15.7	B36.10/.19	27.7	25.4	11.2
1	124	53.8	50.8	17.5	B36.10/.19	34.5	26.9	12.7
1¼	133	63.5	63.5	20.6	B36.10/.19	43.2	28.4	14.2
1½	155	69.9	73.2	22.4	B36.10/.19	49.5	31.8	15.7
2	165	84.1	91.9	25.4	B36.10/.19	62.0	36.6	17.5
2½	191	100.1	104.6	28.4	B36.10/.19	74.7	41.1	19.1
3	210	117.3	127.0	31.8	B36.10/.19	90.7	46.0	20.6
3½	229	133.4	139.7	35.1	B36.10/.19	103.4	49.3	22.4
4	273	152.4	157.2	38.1	B36.10/.19	116.1	53.8	23.9
5	330	189.0	185.7	44.5	B36.10/.19	143.8	60.5	23.9
6	356	222.3	215.9	47.8	B36.10/.19	170.7	66.5	26.9
8	419	273.1	269.7	55.6	B36.10/.19	221.5	76.2	31.8
10	508	342.9	323.9	63.5	B36.10/.19	276.4	85.9	33.3
12	559	400.1	381.0	66.5	B36.10/.19	327.2	91.9	39.6
14	603	431.8	412.8	69.9	B36.10/.19	359.2	93.7	41.4
16	686	495.3	469.9	76.2	B36.10/.19	410.5	106.4	44.5
18	743	546.1	533.4	82.6	B36.10/.19	461.8	117.3	49.3
20	813	609.6	584.2	88.9	B36.10/.19	513.1	127.0	54.1
24	940	717.6	692.2	101.6	B36.10/.19	616.0	139.7	63.5

Size	Drilling			Bolting
inch	Bolt circle Diameter mm	Holes #	Holes Dia. mm	Bolt Dia. inch.	Length FF Flange	Length RF Flange	Length RTJ Flange
1/2	66.5	4	15.7	1/2	76.2	69.9	76.2
3/4	82.6	4	19.1	5/8	88.9	82.6	88.9
1	88.9	4	19.1	5/8	88.9	82.6	88.9
1¼	98.6	4	19.1	5/8	95.3	88.9	95.3
1½	114.3	4	22.4	3/4	108.0	101.6	108.0
2	127.0	8	19.1	5/8	108.0	101.6	108.0
2½	149.4	8	22.4	3/4	120.7	114.3	120.7
3	168.1	8	22.4	3/4	127.0	120.7	127.0
3½	184.2	8	25.4	7/8	139.7	133.4	139.7
4	215.9	8	25.4	7/8	146.1	139.7	146.1
5	266.7	8	28.4	1	165.1	158.8	165.1
6	292.1	12	28.4	1	171.5	165.1	171.5
8	349.3	12	31.8	1^1/8	190.5	184.2	196.9
10	431.8	16	35.1	1¼	215.9	209.6	215.9
12	489.0	20	35.1	1¼	222.3	215.9	222.3
14	527.1	20	38.1	1^3/8	235.0	228.6	235.0
16	603.3	20	41.1	1½	254.0	247.7	254.0
18	654.1	20	44.5	1^5/8	273.1	266.7	273.1
20	723.9	24	44.5	1^5/8	285.8	279.4	292.1
24	838.2	24	50.8	1^7/8	330.2	323.9	336.6

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