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Socket Weld Flange

Size Range: 1/2" - 3" / DN15 - DN80

Pressure Rating: Class 150, 300, 600, 1500

Standard: ANSI / ASME B16.5

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Product Description

Socket weld flange is designed as the pipe is inserted into it's bore and single fillet weld on the outside of flange. It is common used for small diameter high-pressure piping system. To some extent, it is smilar to slip on flange.

Forged steel flange is a disc-shaped piece of equipment used to connect a pipe to fittings or valve or other component to form a pipework system. Usually flange has been attached to pipe or tube end to, and then a gasket is inserted in the middle to form a seal. Finally they are joined together with bolts and nuts.

ASME B16.5 Standard

This standard covers pressure temperature ratings, materials, dimensions, tolerances, marking, testing and methods of designating openings for pipe flanges and flanged fittings. Such as weld neck flanges, slip-on flanges, socket weld flanges, threaded flanges, blind flanges, lap joint flanges and flangolets.

Specification of Forged Steel Flanges

Size Range	1/2"- 3" / DN15 - DN80
Pressure Rating	Class 150, 300, 600, 1500
Standard	ANSI / ASME B16.5
Carbon Steel	ASTM A105 / A105N
Low Temp Carbon Steel	ASTM A350 LF2 / LF3
Pipeline Steel	ASTM A694 F42 / 46 / 56 / 60 / 65
Alloy Steel	ASTM A182 F11 / 12 / 12 / 5 / 9 / 91 / 92
Stainless Steel	ASTM A182 F304 / 304L / 304H, 316 / 316L, 310S, 317, 347, 904L
Duplex Stainless Steel	ASTM A182 F51, F53, F44

Class 150 lb Socket Weld Flange Dimensions & Weight

NPS	A	B	C	D	E	K	F	G	H	I	J	W
	inch	inch	inch	inch	inch	inch	inch	inch	No. of Holes	inch	inch	kg/pc
	mm	mm	mm	mm	mm	mm	mm	mm	No. of Holes	mm	mm	kg/pc
1/2	3.5	0.62	0.44	0.62	0.88	0.38	1.19	1.38	4	0.62	2.38	0.42
1/2	88.9	15.7	11.2	15.7	22.4	9.6	30.2	35.1	4	15.7	60.45	0.42
3/4	3.88	0.82	0.5	0.62	1.09	0.44	1.5	1.69	4	0.62	2.75	0.59
3/4	98.6	20.8	12.7	15.7	27.7	11.1	38.1	42.9	4	15.7	69.85	0.59
1	4.25	1.05	0.56	0.69	1.36	0.50	1.94	2.0	4	0.62	3.120	0.81
1	108	26.7	14.2	17.5	34.5	12.70	49.3	50.8	4	15.7	79.25	0.81
1-1/4	4.62	1.38	0.62	0.81	1.7	0.56	2.31	2.5	4	0.62	3.5	1.07
1-1/4	117.3	35.1	15.7	20.6	43.2	14.2	58.7	63.5	4	15.7	88.9	1.07
1-1/2	5.0	1.61	0.69	0.88	1.95	0.62	2.56	2.88	4	0.62	3.88	1.36
1-1/2	127	40.9	17.5	22.3	49.5	15.7	65.0	73.15	4	15.7	98.6	1.36
2	6.0	2.07	0.75	1.0	2.44	0.69	3.06	3.62	4	0.75	4.75	2.10
2	152.4	52.6	19.1	25.4	62.0	17.5	77.7	91.9	4	19.1	120.7	2.10
2-1/2	7.0	2.47	0.88	1.12	2.94	0.75	3.56	4.12	4	0.75	5.5	3.33
2-1/2	177.8	62.7	22.4	28.4	74.7	19.0	90.4	104.6	4	19.1	139.7	3.33
3	7.5	3.07	0.94	1.19	3.57	0.81	4.25	5.0	4	0.75	6.0	3.90
3	190.5	78.0	23.9	30.2	90.7	20.6	108.	127	4	19.1	152.4	3.90

Class 300 lb Socket Weld Flange Dimensions & Weight

NPS	A	B	C	D	E	K	F	G	H	I	J	W
	inch	inch	inch	inch	inch	inch	inch	inch	No. of Holes	inch	inch	kg/pc
	mm	mm	mm	mm	mm	mm	mm	mm	No. of Holes	mm	mm	kg/pc
1/2	3.75	0.62	0.56	0.88	0.88	0.38	1.5	1.38	4	0.62	2.62	0.66
1/2	95.2	15.7	14.2	22.3	22.4	9.6	38.1	35.1	4	15.7	66.55	0.66
3/4	4.62	0.82	0.62	1.0	1.09	0.44	1.88	1.69	4	0.75	3.25	1.15
3/4	117.3	20.8	15.7	25.4	27.7	11.1	47.7	42.9	4	19.1	82.5	1.15
1	4.88	1.05	0.69	1.06	1.36	0.5	2.12	2.0	4	0.75	3.5	1.40
1	123.9	26.7	17.5	26.9	34.5	12.7	53.8	50.8	4	19.1	88.9	1.40
1-1/4	5.25	1.380	0.75	1.06	1.7	0.56	2.5	2.5	4	0.75	3.88	1.75
1-1/4	133.3	35.1	19	26.9	43.2	14.2	63.5	63.5	4	19.1	98.6	1.75
1-1/2	6.12	1.61	0.81	1.19	1.95	0.62	2.75	2.88	4	0.88	4.5	2.55
1-1/2	155.4	40.9	20.6	30.2	49.5	15.7	69.85	73.15	4	22.3	114.3	2.55
2	6.5	2.07	0.88	1.31	2.44	0.69	3.31	3.62	8	0.75	5.0	2.93
2	165.1	52.6	22.3	33.2	62	17.5	84	91.9	8	19.1	127	2.93
2-1/2	7.5	2.47	1.0	1.5	2.94	0.75	3.94	4.12	8	0.88	5.88	4.40
2-1/2	190.5	62.7	25.4	38.1	74.7	19	100	104.6	8	22.3	149.3	4.40
3	8.25	3.07	1.12	1.69	3.57	0.81	4.62	5.0	8	0.88	6.62	5.92
3	209.5	78	28.4	42.9	90.7	20.6	117.3	127	8	22.3	168.1	5.92

Notes

1) Dimension B corresponds to the pipe inside diameter. Values quoted assume 40S/Standard wall thickness.

2) Weights are based on manufacturer's data and are approximate.

Class 600 lb Socket Weld Flange Dimensions & Weight

NPS	A	B	C	D	E	K	F	G	H	I	J	W
	inch	inch	inch	inch	inch	inch	inch	inch	No. of Holes	inch	inch	kg/pc
	mm	mm	mm	mm	mm	mm	mm	mm	No. of Holes	mm	mm	kg/pc
1/2	3.75		0.56	0.88	0.88	0.38	1.5	1.38	4	0.62	2.62	0.76
1/2	95.2		0.56	0.88	0.88	0.38	1.5	1.38	4	15.7	66.55	0.76
3/4	4.62		0.62	1.0	1.09	0.44	1.88	1.69	4	0.75	3.25	1.29
3/4	117.3		15.7	25.4	27.7	11.1	47.7	42.9	4	0.75	3.25	1.29
1	4.88		0.69	1.06	1.36	0.5	2.12	2.0	4	0.75	3.5	1.55
1	123.9		17.5	26.9	34.5	12.7	53.8	50.8	4	0.75	3.5	1.55
1-1/4	5.25		0.81	1.12	1.7	0.56	2.5	2.5	4	0.75	3.88	2.06
1-1/4	133.3		20.6	28.4	43.2	14.2	63.5	63.5	4	19.1	98.6	2.06
1 1-/2	6.12		0.88	1.25	1.95	0.62	2.75	2.88	4	0.88	4.5	3.00
1 1-/2	155.4		22.3	31.75	49.5	157	69.85	73.15	4	22.3	114.3	3.00
2	6.5		1.0	1.44	2.44	0.69	3.31	3.62	8	0.75	5.0	3.67
2	165.1		25.4	36.6	62	17.5	84	91.9	8	19.1	127	3.67
2-1/2	7.5		1.12	1.62	2.94	0.75	3.94	4.12	8	0.88	5.88	5.35
2-1/2	190.5		28.4	41.1	74.7	19	100	104.6	8	22.3	149.3	5.35
3	8.25		1.25	1.81	3.57	0.81	4.62	5.0	8	0.88	6.62	7.06
3	209.5		31.75	46	90.7	20.6	117.3	127	8	22.3	168.1	7.06

Class 1500 lb Socket Weld Flange Dimensions & Weight

NPS	A	B	C	D	E	K	F	G	H	I	J	W
	inch	inch	inch	inch	inch	inch	inch	inch	No. of Holes	inch	inch	kg/pc
	mm	mm	mm	mm	mm	mm	mm	mm	No. of Holes	mm	mm	kg/pc
1/2	4.75		0.88	1.25	0.88	0.38	1.5	1.38	4	0.88	3.25	1.80
1/2	120.6		22.3	31.7	22.4	9.6	38.1	35.1	4	22.3	82.5	1.80
3/4	5.12		1.0	1.38	1.09	0.4	1.75	1.69	4	0.88	3.5	2.41
3/4	130		25.4	35	27.7	11.1	44.4	42.9	4	22.3	88.9	2.41
1	5.88		1.12	1.62	1.36	0.5	2.06	2.0	4	1.0	4.0	3.55
1	149.3		28.4	41.1	34.5	12.7	52.3	50.8	4	25.4	101.6	3.55
1-1/4	6.25		1.12	1.62	1.7	0.5	2.5	2.5	4	1.0	4.38	4.02
1-1/4	158.7		28.4	41.1	43.2	14.2	63.5	63.5	4	25.4	111.2	4.02
1-1/2	7.0		1.25	1.75	1.95	0.6	2.75	2.88	4	1.12	4.88	5.45
1-1/2	177.8		31.75	44.5	49.5	15.7	69.85	73.15	4	28.4	123.9	5.45
2	8.5		1.5	2.25	2.44	0.69	4.12	3.62	8	1.0	6.5	10.2
2	215.9		38.1	57.15	62	17.5	104.6	91.9	8	25.4	165	10.2
2-1/2	9.62		1.62	2.5	2.94	0.75	4.88	4.12	8	1.120	7.5	13.9
2-1/2	244.3		41.1	63.5	74.7	19	123.9	104.6	8	28.4	190.5	13.9

Notes

1) Class 400 socket weld flanges may be provided in NPS 1/2 to 2-1/2 using Class 600 dimensions.

2) Dimension B corresponds to the pipe inside diameter. Values quoted assume 40S/Standard wall thickness .

3) Weights are based on manufacturer's data and are approximate.

4) The blank space needs o be specified by purchaser.

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