ANSI B16.5 Threaded Flange:

Description

Product Description ANSI B16.5 Threaded Flange

ANSI B16.5 Threaded Flanges are a type of pipe flange designed for threaded connections. They are commonly used in low-pressure and non-critical applications, offering easy installation and removal without the need for welding.

ANSI B16.5 Threaded Flange Dimension

Class 150 Threaded Flange Dimensions

Nominal	Outside Dia	Thick of	Dia of	Dia of	Length	Min Thread	Min Counter	No of	Dia of	Dia of	Dia of	Approx
Pipe Size	of Flange	Flange	Raised Face	Hub at Base	thru Hub	Length	Bore	Holes	Holes	Bolts	Bolt Circle	Weight
	(D)	(B)	(G)	(A)	(H)	(T)	(Q)		(L)	(inch)	(K)	(kg)
1/2	88.9	11.2	35.1	30.2	15.7	15.7		4	15.7	1/2	60.5	0.5
3/4	98.6	12.7	42.9	38.1	15.7	15.7		4	15.7	1/2	69.9	1
1	108	14.2	50.8	49.3	17.5	17.5		4	15.7	1/2	79.2	1
1-1/4	117.3	15.7	63.5	58.7	20.6	20.6		4	15.7	1/2	88.9	1
1-1/2	127	17.5	73.2	65	22.4	22.4		4	15.7	1/2	98.6	1
2	152.4	19.1	91.9	77.7	25.4	25.4		4	19.1	5/8	120.7	2
2-1/2	177.8	22.4	104.6	90.4	28.4	28.4		4	19.1	5/8	139.7	3
3	190.5	23.9	127	108	30.2	30.2		4	19.1	5/8	152.4	4
3-1/2	215.9	23.9	139.7	122.2	31.8	31.8		8	19.1	5/8	177.8	5
4	228.6	23.9	157.2	134.9	33.3	33.3		8	19.1	5/8	190.5	6
5	254	23.9	185.7	163.6	36.6	36.6		8	22.4	3/4	215.9	7
6	279.4	25.4	215.9	192	39.6	39.6		8	22.4	3/4	241.3	9
8	342.9	28.4	269.7	246.1	44.5	44.5		8	22.4	3/4	298.5	14
10	406.4	30.2	323.9	304.8	49.3	49.3		12	25.4	7/8	362	20
12	482.6	31.8	381	365.3	55.6	55.6		12	25.4	7/8	431.8	29
14	533.4	35.1	412.8	400.1	57.2	57.2		12	28.4	1	476.3	41
16	596.9	36.6	469.9	457.2	63.5	63.5		16	28.4	1	539.8	44
18	635	39.6	533.4	505	68.3	68.3		16	31.8	1-1/8	577.9	59
20	698.5	42.9	584.2	558.8	73.2	73.2		20	31.8	1-1/8	635	75
24	812.8	47.8	692.2	663.4	82.6	82.6		20	35.1	1-1/4	749.3	100

Class 300 Threaded Flange Dimensions

Nominal	Outside Dia	Thick of	Dia of	Dia of	Length	Min Thread	Min Counter	No of	Dia of	Dia of	Dia of	Approx
Pipe Size	of Flange	Flange	Raised Face	Hub at Base	thru Hub	Length	Bore	Holes	Holes	Bolts	Bolt Circle	Weight
	(D)	(B)	(G)	(A)	(H)	(T)	(Q)		(L)	(inch)	(K)	(kg)
1/2	95.3	14.2	35.1	38.1	22.4	15.7	23.6	4	15.7	1/2	66.5	1
3/4	117.3	15.7	42.9	47.8	25.4	15.7	29	4	19.1	5/8	82.6	1
1	124	17.5	50.8	53.8	26.9	17.5	35.8	4	19.1	5/8	88.9	1
1-1/4	133.4	19.1	63.5	63.5	26.9	20.6	44.5	4	19.1	5/8	98.6	2
1-1/2	155.4	20.6	73.2	69.9	30.2	22.4	50.5	4	22.4	3/4	114.3	3
2	165.1	22.4	91.9	84.1	33.3	28.4	63.5	8	19.1	5/8	127	3
2-1/2	190.5	25.4	104.6	100.1	38.1	31.8	76.2	8	22.4	3/4	149.4	5
3	209.6	28.4	127	117.3	42.9	31.8	92.2	8	22.4	3/4	168.1	6
3-1/2	228.6	30.2	139.7	133.4	44.5	36.6	104.9	8	22.4	3/4	184.2	8
4	254	31.8	157.2	146.1	47.8	36.6	117.6	8	22.4	3/4	200.2	10
5	279.4	35.1	185.7	177.8	50.8	42.9	144.5	8	22.4	3/4	235	13
6	317.5	36.6	215.9	206.2	52.3	46	171.5	12	22.4	3/4	269.7	18
8	381	41.1	269.7	260.4	62	50.8	222.3	12	25.4	7/8	330.2	26
10	444.5	47.8	323.9	320.5	66.5	55.6	276.4	16	28.4	1	387.4	37
12	520.7	50.8	381	374.7	73.2	60.5	328.7	16	31.8	1-1/8	450.9	52
14	584.2	53.8	412.8	425.5	76.2	63.5	360.4	20	31.8	1-1/8	514.4	75
16	647.7	57.2	469.9	482.6	82.6	68.3	411.2	20	35.1	1-1/4	571.5	86
18	711.2	60.5	533.4	533.4	88.9	69.9	462	24	35.1	1-1/4	628.7	113
20	774.7	63.5	584.2	587.2	95.3	73.2	512.8	24	35.1	1-1/4	685.8	143
24	914.4	69.9	692.2	701.5	106.4	82.6	614.4	24	41.1	1-1/2	812.8	215

Class 600 Threaded Flange Dimensions

Nominal	Outside Dia	Thick of	Dia of	Dia of	Length	Min Thread	Min Counter	No of	Dia of	Dia of	Dia of	Approx
Pipe Size	of Flange	Flange	Raised Face	Hub at Base	thru Hub	Length	Bore	Holes	Holes	Bolts	Bolt Circle	Weight
	(D)	(B)	(G)	(A)	(H)	(T)	(Q)		(L)	(inch)	(K)	(kg)
1/2	95.3	14.2	35.1	38.1	22.4	15.7	23.6	4	15.7	1/2	66.5	1
3/4	117.3	15.7	42.9	47.8	25.4	15.7	29	4	19.1	5/8	82.6	1
1	124	17.5	50.8	53.8	26.9	17.5	35.8	4	19.1	5/8	88.9	2
1-1/4	133.4	20.6	63.5	63.5	28.4	20.6	44.5	4	19.1	5/8	98.6	2
1-1/2	155.4	22.4	73.2	69.9	31.8	22.4	50.5	4	22.4	3/4	114.3	3
2	165.1	25.4	91.9	84.1	36.6	28.4	63.5	8	19.1	5/8	127	4
2-1/2	190.5	28.4	104.6	100.1	41.1	31.8	76.2	8	22.4	3/4	149.4	6
3	209.6	31.8	127	117.3	46	35.1	92.2	8	22.4	3/4	168.1	7
3-1/2	228.6	35.1	139.7	133.4	49.3	39.6	104.9	8	25.4	7/8	184.2	10
4	273.1	38.1	157.2	152.4	53.8	41.1	117.6	8	25.4	7/8	215.9	17
5	330.2	44.5	185.7	189	60.5	47.8	144.5	8	28.4	1	266.7	29
6	355.6	47.8	215.9	222.3	66.5	50.8	171.5	12	28.4	1	292.1	36
8	419.1	55.6	269.7	273.1	76.2	57.2	222.3	12	31.8	1-1/8	349.3	52
10	508	63.5	323.9	342.9	85.9	65	276.4	16	35.1	1-1/4	431.8	77
12	558.8	66.5	381	400.1	91.9	69.9	328.7	20	35.1	1-1/4	489	91
14	603.3	69.9	412.8	431.8	93.7	2.9	360.4	20	38.1	1-3/8	527.1	104
16	685.8	76.2	469.9	495.3	106.4	77.7	411.2	20	41.1	1-1/2	603.3	150
18	743	82.6	533.4	546.1	117.3	79.2	462	20	44.5	1-5/8	654.1	181
20	812.8	88.9	584.2	609.6	127	82.6	512.8	24	44.5	1-5/8	723.9	231
24	939.8	101.6	692.2	717.6	139.7	91.9	614.4	24	50.8	1-7/8	838.2	331

Class 900 Threaded Flange Dimensions

Nominal	Outside Dia	Thick of	Dia of	Dia of	Length	Min Thread	Min Counter	No of	Dia of	Dia of	Dia of	Approx
Pipe Size	of Flange	Flange	Raised Face	Hub at Base	thru Hub	Length	Bore	Holes	Holes	Bolts	Bolt Circle	Weight
	(D)	(B)	(G)	(A)	(H)	(T)	(Q)		(L)	(inch)	(K)	(kg)
1/2	120.7	22.4	35.1	38.1	31.8	22.4	23.6	4	22.4	3/4	82.6	2
3/4	130	25.4	42.9	44.5	35.1	25.4	29	4	22.4	3/4	88.9	2
1	149.4	28.4	50.8	52.3	41.1	28.4	35.8	4	25.4	7/8	101.6	4
1-1/4	158.8	28.4	63.5	63.5	41.1	30.2	44.5	4	25.4	7/8	111.3	4
1-1/2	177.8	31.8	73.2	69.9	44.5	31.8	50.5	4	28.4	1	124	5
2	215.9	38.1	91.9	104.6	57.2	38.1	63.5	8	25.4	7/8	165.1	11
2-1/2	244.3	41.1	104.6	124	63.5	47.8	76.2	8	28.4	1	190.5	16
3	241.3	38.1	127	127	53.8	41.1	92.2	8	25.4	7/8	190.5	12
4	292.1	44.5	157.2	158.8	69.9	47.8	117.6	8	31.8	1-1/8	235	24
5	349.3	50.8	185.7	190.5	79.2	53.8	144.5	8	35.1	1-1/4	279.4	38
6	381	55.6	215.9	235	85.9	57.2	171.5	12	31.8	1-1/8	317.5	50
8	469.9	63.5	269.7	298.5	101.6	63.5	222.3	12	38.1	1-3/8	393.7	77
10	546.1	69.9	323.9	368.3	108	71.4	276.4	16	38.1	1-3/8	469.9	111
12	609.6	79.2	381	419.1	117.3	76.2	328.7	20	38.1	1-3/8	533.4	147
14	641.4	85.9	412.8	450.9	130	82.6	360.4	20	41.1	1-1/2	558.8	181
16	704.9	88.9	469.9	508	133.4	85.9	411.2	20	44.5	1-5/8	616	193
18	787.4	101.6	533.4	565.2	152.4	88.9	462	20	50.8	1-7/8	685.8	272
20	857.3	108	584.2	622.3	158.8	91.9	512.8	20	53.8	2	749.3	331
24	1041.4	139.7	692.2	749.3	203.2	101.6	614.4	20	66.5	2-1/2	901.7	635

Class 1500 Threaded Flange Dimensions

Nominal	Outside Dia	Thick of	Dia of	Dia of	Length	Min Thread	Min Counter	No of	Dia of	Dia of	Dia of	Approx
Pipe Size	of Flange	Flange	Raised Face	Hub at Base	thru Hub	Length	Bore	Holes	Holes	Bolts	Bolt Circle	Weight
	(D)	(B)	(G)	(A)	(H)	(T)	(Q)		(L)	(inch)	(K)	(kg)
1/2	120.7	22.4	35.1	38.1	31.8	22.4	23.6	4	22.4	3/4	82.6	2
3/4	130	25.4	42.9	44.5	35.1	25.4	29	4	22.4	3/4	88.9	2
1	149.4	28.4	50.8	52.3	41.1	28.4	35.8	4	25.4	7/8	101.6	4
1-1/4	158.8	28.4	63.5	63.5	41.1	30.2	44.5	4	25.4	7/8	111.3	4
1-1/2	177.8	31.8	73.2	69.9	44.5	31.8	50.5	4	28.4	1	124	5
2	215.9	38.1	91.9	104.6	57.2	38.1	63.5	8	25.4	7/8	165.1	11
2-1/2	244.3	41.1	104.6	124	63.5	47.8	76.2	8	28.4	1	190.5	16

Class 2500 Threaded Flange Dimensions

Nominal	Outside Dia	Thick of	Dia of	Dia of	Length	Min Thread	Min Counter	No of	Dia of	Dia of	Dia of	Approx
Pipe Size	of Flange	Flange	Raised Face	Hub at Base	thru Hub	Length	Bore	Holes	Holes	Bolts	Bolt Circle	Weight
	(D)	(B)	(G)	(A)	(H)	(T)	(Q)		(L)	(inch)	(K)	(kg)
1/2	133.4	30.2	35.1	42.9	39.6	28.4	23.6	4	22.4	3/4	88.9	3
3/4	139.7	31.8	42.9	50.8	42.9	31.8	29	4	22.4	3/4	95.3	4
1	158.8	35.1	50.8	57.2	47.8	35.1	35.8	4	25.4	7/8	108	5
1-1/4	184.2	38.1	63.5	73.2	52.3	38.1	44.5	4	28.4	1	130	7
1-1/2	203.2	44.5	73.2	79.2	60.5	44.5	50.5	4	31.8	1-1/8	146.1	10
2	235	50.8	91.9	95.3	69.9	50.8	63.5	8	28.4	1	171.5	17
2-1/2	266.7	57.2	104.6	114.3	79.2	57.2	76.2	8	31.8	1-1/8	196.9	25

Technical Specifications:

Pressure Ratings:

Class 150, 300, 600, 900, 1500, and 2500.

Facing Types:

Raised Face (RF), Flat Face (FF), and Ring-Type Joint (RTJ).

Thread Standard:

Typically follows ASME B1.20.1 for NPT (National Pipe Thread).

Advantages of ANSI B16.5 Threaded Flanges:

• No Welding Required: Ideal for applications where welding is not feasible.
• Reusability: Can be reused multiple times, reducing installation costs.
• Durability: Resistant to corrosion and wear when made from high-quality materials.

Applications:

• Chemical processing plants
• Oil and gas pipelines
• HVAC systems
• Water and wastewater treatment plants
• Firefighting systems