ASA 150 Flange Dimensions and Weight Chart

Nom. Pipe Size	TJ	R	O	T	X	#/Dia of Holesa	Bolt Circle Dia	B3	H	L	B	B2b	r	D	L2	L3c	Thr
½	0.44	1.38	3.50	0.38	1.19	4-0.62	2.38	0.90	0.84	0.56	0.88	0.62	0.12	0.38	1.81	0.62	0.62
¾	0.50	1.69	3.88	0.44	1.50	4-0.62	2.75	1.11	1.05	0.56	1.09	0.82	0.12	0.44	2.00	0.62	0.62
3	0.94	5.00	7.50	0.88	4.25	4-0.75	6.00	3.60	3.50	1.12	3.57	3.07	0.38	0.81	2.69	1.19	1.19
3½	0.94	5.50	8.50	0.88	4.81	8-0.75	7.00	4.10	4.00	1.19	4.07	3.55	0.38	0.88	2.75	1.25	1.25
4	0.94	6.19	9.00	0.88	5.31	8-0.75	7.50	4.60	4.50	1.25	4.57	4.03	0.44	0.94	2.94	1.31	1.31
5	0.94	7.31	10.00	0.88	6.44	8-0.88	8.50	5.69	5.56	1.38	5.66	5.05	0.44	0.94	3.44	1.44	1.44
6	1.00	8.50	11.00	0.94	7.56	8-0.88	9.50	6.75	6.63	1.50	6.72	6.07	0.50	1.06	3.44	1.56	1.56
8	1.12	10.62	13.50	1.06	9.69	8-0.88	11.75	8.75	8.63	1.69	8.72	7.98	0.50	1.25	3.94	1.75	1.75
1	0.56	2.00	4.25	0.50	1.94	4-0.62	3.12	1.38	1.32	0.62	1.36	1.05	0.12	0.50	2.12	0.69	0.69
1¼	0.62	2.50	4.62	0.56	2.31	4-0.62	3.50	1.72	1.66	0.75	1.70	1.38	0.19	0.56	2.19	0.81	0.81
1½	0.69	2.88	5.00	0.62	2.56	4-0.62	3.88	1.97	1.90	0.81	1.95	1.61	0.25	0.62	2.38	0.88	0.88
2	0.75	3.62	6.00	0.69	3.06	4-0.75	4.75	2.46	2.38	0.94	2.44	2.07	0.31	0.69	2.44	1.00	1.00
2½	0.88	4.12	7.00	0.81	3.56	4-0.75	5.50	2.97	2.88	1.06	2.94	2.47	0.31	0.75	2.69	1.12	1.12
10	1.19	12.75	16.00	1.12	12.00	12-1.00	14.25	10.92	10.75	1.88	10.88	10.02	0.50	1.31	3.94	1.94	1.94
18	1.56	21.00	25.00	1.50	19.88	16-1.25	22.75	18.20	18.00	2.62	18.18	17.25	0.50	1.94	5.44	3.81	2.69
20	1.69	23.00	27.50	1.62	22.00	20-1.25	25.00	20.25	20.00	2.81	20.20	19.25	0.50	2.13	5.62	4.06	2.88
12	1.25	15.00	19.00	1.19	14.38	12-1.00	17.00	12.92	12.75	2.12	12.88	12.00	0.50	1.56	4.44	2.19	2.19
14	1.38	16.25	21.00	1.31	15.75	12-1.12	18.75	14.18	14.00	2.19	14.14	13.25	0.50	1.63	4.94	3.12	2.25
16	1.44	18.50	23.50	1.38	18.00	16-1.12	21.25	16.19	16.00	2.44	16.16	15.25	0.50	1.75	4.94	3.44	2.50
22	1.81	25.25	29.50	1.75	24.25	20-1.38	27.25	22.25	22.00	3.07	22.22	21.25	0.50	2.38	5.82	4.25	3.13
24	1.88	27.25	32.00	1.81	26.12	20-1.38	29.50	24.25	24.00	3.19	24.25	23.25	0.50	2.50	5.94	4.38	3.25

ASA 150 Flange Chart
ASA Flange Full Form
ASA 150 Blind and Weld Neck Flange Weight Chart
ASME B16.5 Class 150 Flange Pressure Rating
ASA 150 Lb Flange Dimensions
ANSI 150 Flange Size
ASA 150 Flange Full Form
ASA B16.5 150# Flanges Thickness
ASA 150 Flange Application
ASA 150 Lb Flange Weight Chart
Class 150 Flange Bolt Chart
MS Flange ASA 150 PCD Chart
ASA 150 RF Slip-On Flanges Thickness Chart
Importance of the ASA 150# Flanges

ANSI/ ASME/ ASA 150LB Flange Specification

Specifications	ASME B16.5 Class 150 Flange
Class 150 Flange Standard EN	25Bar 40Bar 6Bar 10Bar 16Bar
Class 150 Flange Size Ranges	1/2″ (15 NB) to 48″ (1200NB) DN10~DN5000
Types of ASME B16.5 Class 150 Flange	Class 150 Large Diameter Flange Class 150 Slip-On Flanges Class 150 Threaded Flanges Class 150 Orifice Flanges Class 150 Loose Flanges DIN 2566 pn10 DIN 2566 en 1092 1 Class 150 Plate Flanges Class 150 Blind Flanges PN16 Flange Class 150 Socketweld Flanges DIN 2566 pn16 Rtj Flange Class 150 Weld Neck Flanges Class 150 Sorf Flange Class 150 Lap Joint Flanges Class 150 Table Flanges Class 150 Large Male-Female (LMF) DIN 2566 pn16
Test	Direct-reading Spectrograph, X-ray detector, Magnetic particle detector, UI trasonic flaw detector, Hydrostatic testing machine
Class 150 Flanges Standard	UNI, BS, AS2129,ANSI DIN, GOST, JIS, SABS, NFE, AWWA, EN, etc. BS Flange, EN Flange, AWWA C207 Flange, GOST Flange, EN1092-1 Flange, UNI Flange, JIS/ KS Flange, BS4504 Flange, API 6A Flange, ANSI Flange, ASME Flange, DIN Flange, GB Flange, PSI Flange DIN: DIN 2527, DIN 2566, DIN 2573, DIN 2628, DIN 2629, DIN 2631, DIN 2632, DIN 2633, DIN 2576, DIN 2641, DIN 2642, DIN 2655, DIN 2656, DIN 2627, DIN 2634, DIN 2635, DIN 2636, DIN 2637, DIN 2638 Any other specialized flanges B.S: BS4504,BS1560, BS10, BS3293 American standard (ANSI) ANSI B16.5-ANSI B16.47 Series A- B, ASA, API-605, AWWA,MSS SP44 ANSI B16.5- ANSI B16.47, MSS SP44, ANSI B16.36, ANSI B16.48 German (DIN) BS: BS4504- BS3293, BS1560, BS10 ANSI B16.5- ANSI B16.47 Series A – B, MSS SP44, API-605, AWWA,ASA British standard (BS) DIN 2527, DIN 2566, DIN 2573, DIN 2628, DIN 2629, DIN 2631 The other standard: GOST12820,EN1092-1, NFE29203; SABS1123; AWWA C207; KS B1503,UNI2276, JIS B2220;
Class 150 Pipe Flanges Test Certificates	EN 10204/3.1B Raw Materials Certificate 100% Radiography Test Report Third Party Inspection Report
ASME B16.5 Class 150 Flange Application	To Connect Pipe-Tubes in Petroleum, Gas, Metallurgy, Shipbuilding,Power, Chemical, Construction, etc
Flange supporting material	Gasket, Ring Joint, Flange, Bolts
Equipment	Press machine, Pushing Machine, Bending machine, Sand-blasting machine ,Electric bevelling machine, etc
Class 150 Flange Standard UNI	6Bar 10Bar 16Bar 25Bar 40Bar
Main Types	Forged/ Threaded (Screwed) / Plate / Cast
Connect Type/ Flange Face Type	Ring Type Joint (RTJ), Lap-Joint Face (LJF), Large Tongue & Groove, Groove, Small Male-Female (SMF), Flat Face (FF), Large Male-Female (LMF), Raised Face (RF), Small Tongue
ASA 150 Flange Standard DIN	6Bar 10Bar 16Bar 25Bar 40Bar / PN6 PN10 PN16 PN25 PN40, PN64
Class 150 Flange Standard JIS	5K, 30 K, 40 K, 63 K, 10 K, 16 K 20 K
Most common types of Class 150 Flanges	Socket Weld Ring Flange (SWRF), Class 150 Threaded Ring Flange, Class 150 Lap Joint Ring Flange (LJRF), Class 150 Weld Neck Ring Flange (WNRF), Class 150 Blind Ring Flange (BLRF), Class 150 Slip-On Ring Flange (SORF), Class 150 Ring Type Joint Flange (RTJF), Class 150
Special Configurations	AS, ANSI, BS, DIN and JIS 15 NB (1/2″) to 200 NB (8″) Equal and Reducing Class 150 Threaded Flange, Socketweld Flange, Slip-On Flange, Blind Flange, Weld Neck Flange
Production method	Forged, Heat treated and machined

ASME B16.5 Class 150 Blind Flange Dimensions

Nominal Size’s	Thickness					Drilling				Weight
	Outside Diameter (O.D.)	Weld Neck	Blind	O.D. of RF	Dia at Base	Bolt Circle	Dia Bevel	LTH	Bolt Length	Weld Neck	# of Holes	HoleDia	Blind
	O	C	C	R	X	Bolt Circle	A	Y	(1)	Weld Neck	# of Holes	(2)	Blind
26	34.25	2.63	2.63	29.5	26.62	31.75	26	4.69	8.75	300	24	1.38	702
30	38.75	2.88	2.88	33.75	30.75	36	30	5.32	9.25	400	28	1.38	982
52	64	4.5	4.5	57.5	53.25	60.5	52	8.19	13.75	1410	44	1.88	4156
34	43.75	3.19	3.19	38	34.75	40.5	34	5.82	10.5	540	32	1.62	1384
38	48.75	3.38	3.38	42.25	39	45.25	38	6.13	11	720	32	1.62	1819
46	57.25	4	4	51	47.12	53.75	46	7.25	12	1060	40	1.62	2961
50	61.75	4.32	4.32	55.5	51.25	58.25	50	7.94	13.25	1270	44	1.88	3716
54	66.25	4.69	4.69	59.5	55.25	62.75	54	8.44	14	1585	44	1.88	4639
58	71	5	5	64	59.38	67.25	58	9.19	14.75	1915	48	1.88	5675
28	36.5	2.75	2.75	31.5	28.62	34	28	4.88	9	345	28	1.38	833
32	41.75	3.13	3.13	36	32.75	38.5	32	5.63	10.5	505	28	1.62	1237
36	46	3.5	3.5	40.25	36.75	42.75	36	6.13	11	640	32	1.62	1676
48	59.5	4.19	4.19	53.5	49.12	56	48	7.5	12.5	1185	44	1.62	3348
44	55.25	3.94	3.94	49	45	51.75	44	6.94	12	990	40	1.62	2717
56	68.75	4.82	4.82	62	57.38	65	56	8.94	14.25	1760	48	1.88	5132
60	73	5.13	5.13	66	61.38	69.25	60	9.38	15	2045	52	1.88	6154

Types of 150# ASA Flanges as per ANSI B16.47 Series A and B16.5

Class 150 Blind Flange

150 Nb Long Weld Neck Flange

ANSI 150 Slip on Flange

150# Weld Neck Flange

150 Lb Lap Joint Flange

Cl 150 Threaded Flange

ANSI 150 Lb Square Flange

ASA 150 Ring Type Joint Flange

ANSI 150 Plate Flange

ASA 150 MS Flange Dimensions

Size (NB)	OD of Flange (mm)	Dia. of Bore (mm)	Thickness (mm)	PCD (mm)	No. of Holes	Dia. of Bolt (mm)
15NB	88.9	22.40	11.1	60.3	4	12.8
20NB	98.4	27.70	12.7	69.9	4	12.8
25NB	108.0	34.50	14.3	79.4	4	12.8
80NB	190.6	90.70	23.7	152.4	4	15.9
100NB	228.7	116.10	23.7	190.5	8	15.9
125NB	254.1	143.81	23.7	215.9	8	19.1
150NB	279.4	170.70	25.4	241.3	8	19.1
200NB	342.8	221.50	28.6	298.5	8	19.1
32NB	117.6	43.21	15.8	88.8	4	12.8
300NB	482.6	327.20	31.8	431.9	12	22.2
350NB	533.4	349.20	34.8	476.3	12	25.4
40NB	127.0	49.50	17.5	98.4	4	12.8
50NB	152.4	62	19.1	120.7	4	15.8
65NB	177.8	74.70	22.2	139.8	4	15.9
250NB	406.4	276.41	30.2	362.0	12	22.2
400NB	596.8	410.51	36.5	539.7	16	25.4
450NB	635.0	461.80	39.8	577.8	16	28.6
500NB	698.5	513.10	42.8	635.0	20	28.6

Most Common Material and Standard of Class 150 Flanges used in Petrochemical Industry

Material	Pipes	Fittings	Flanges	Valves	Bolts & Nuts
Carbon Steel	A106 GR A	A234 GR WPA	A105	A216 GR WCB	A193 GR B7 A194 GR 2H
	A106 GR B	A234 GR WPB	A105	A216 GR WCB
	A106 GR C	A234 GR WPC	A105	A216 GR WCB
Carbon Steel Alloy Low-Temp	A333 GR 3	A420 GR WPL3	A350 GR LF3	A352 GR LC3	A320 GR L7, A194 GR 7
Carbon Steel Alloy Low-Temp	A333 GR 6	A420 GR WPL6	A350 GR LF2	A352 GR LCB	A320 GR L7, A194 GR 7
Carbon Steel Alloy High-Temp	A335 GR P12	A234 GR WP12	A182 GR F12	A217 GR WC6	A193 GR B7, A194 GR 2H
	A335 GR P11	A234 GR WP11	A182 GR F11	A217 GR WC6
	A335 GR P5	A234 GR WP5	A182 GR F5	A217 GR C5
	A335 GR P22	A234 GR WP22	A182 GR F22	A217 GR WC9
	A335 GR P1	A234 GR WP1	A182 GR F1	A217 GR WC1
	A335 GR P9	A234 GR WP9	A182 GR F9	A217 GR C12
Austenitic Stainless Steel	A312 GR TP316	A403 GR WP316	A182 GR F316	A182 GR F316	A193 GR B8, A194 GR 8
	A312 GR TP321	A403 GR WP321	A182 GR F321	A182 GR F321
	A312 GR TP304	A403 GR WP304	A182 GR F304	A182 GR F304
	A312 GR TP347	A403 GR WP347	A182 GR F347	A182 GR F347

ASA 150 Flange Chart

NPS Nominal Pipe Size	O mm	O inch	W mm	W inch	Tf mm	Tf inch	d mm	d inch	Number holes
1/2″	90.00	3.54	60.30	2.37	9.60	0.38	15.88	5/8	4
3/4″	100.00	3.94	69.90	2.75	11.20	0.44	15.88	5/8	4
1″	110.00	4.33	79.40	3.13	12.70	0.50	15.88	5/8	4
14″	115.00	4.53	88.90	3.50	14.30	0.56	15.88	5/8	4
11/2″	125.00	4.92	98.40	3.87	15.90	0.63	15.88	5/8	4
2″	150.00	5.91	120.70	4.75	17.50	0.69	19.05	3/4	4
21/2″	180.00	7.09	139.70	5.50	20.70	0.81	19.05	3/4	4
3″	190.00	7.48	152.40	6.00	22.30	0.88	19.05	3/4	4
31½”	215.00	8.46	177.80	7.00	22.30	0.88	19.05	3/4	8
4″	230.00	9.06	190.50	7.50	22.30	0.88	19.05	3/4	8
5″	255.00	10.04	215.90	8.50	22.30	0.88	22.23	7/8	8
6″	280.00	11.02	241.30	9.50	23.90	0.94	22.23	7/8	8
8″	345.00	13.58	298.50	11.75	27.00	1.06	22.23	7/8	8
10″	405.00	15.94	362.00	14.25	28.60	1.13	25.40	1	12
12″	485.00	19.09	431.80	17.00	30.20	1.19	25.40	1	12
14″	535.00	21.06	476.30	18.75	33.40	1.31	28.58	11/8	12
16″	595.00	23.43	539.80	21.25	35.00	1.38	28.58	1/8	16
18″	635.00	25.00	577.90	22.75	38.10	1.50	31.75	11/4	16
20″	700.00	27.56	635.00	25.00	41.30	1.63	31.75	11/4	20
24″	815.00	32.09	749.30	29.50	46.10	1.81	31.75	13/8	20

ASA Flange Full Form

ASA Flange :- American Standard Association Flange

ASA 150 Blind and Weld Neck Flange Weight Chart

NPS		Dimension		Weight in kilogram
DN in millimetre	NPS in Inch	Thickness	millimetre	Weldneck	Socket weld	Blind
15	1/2	11.2	88.9	.5	.4	.4
20	3/4	12.7	98.6	.7	.6	.6
25	1	14.2	108	1	.8	.9
32	1 1/4	15.7	117.3	1.3	1	1.2
40	1 1/2	17.5	127	1.7	1.3	1.5
50	2	19.1	152.4	2.6	2.1	2.4
65	2 1/2	22.4	177.8	4.1	3.3	3.9
80	3	23.9	19 .5	4.9	3.9	4.9
90	3 1/2	23.9	215.9	6.1	4.8	6.2
100	4	23.9	228.6	6.8	5.3	7
125	5	23.9	254	8.6	6.1	8.6
150	6	25.4	279.4	1 .6	7.5	11.3
200	8	28.4	342.9	17.6	12.1	19.6
250	10	3 .2	406.4	24	16.5	28.6
300	12	31.8	482.6	36.5	26.2	43.2
350	14	35.1	533.4	48.4	34.6	58.1
400	16	36.6	596.9	6 .6	44.8	76.1
450	18	39.6	635	68.3	48.9	93.7
500	20	42.9	698.5	84.5	61.9	122
600	24	47.8	812.8	115	86.9	185

ASME B16.5 Class 150 Flange Pressure Rating

Temp -29 °C	38	50	100	150	200	250	300	325	350	375	400	425	450	475	500	538
150	19.6	19.2	17.7	15.8	13.8	12.1	10.2	9.3	8.4	7.4	6.5	5.5	4.6	3.7	2.8	1.4

ASA 150 Lb Flange Dimensions

Nominal	150 LB. Flanges		Lenght of Stud
Pipe Size	#Bolts or Studs	Dia of Bolts or Studs	1/16 RF	RTJ
1/2	4	0.50	2-1/4
3/4	4	0.50	2-1/2
1	4	0.50	2-1/2	3
1-1/4	4	0.50	2-3/4	3-1/4
1-1/2	4	0.50	2-3/4	3-1/4
2	4	0.63	3-1/4	3-3/4
2-1/2	4	0.63	3-1/2	4
3	4	0.63	3-1/2	4
3-1/2	8	0.63	3-1/2	4
4	8	0.63	3-1/2	4
5	8	0.75	3-3/4	4-1/4
6	8	0.75	4	4-1/2
8	8	0.75	4-1/4	4-3/4
10	12	0.88	4-1/2	5
12	12	0.88	4-3/4	5-1/4
14	12	1.00	5-1/4	5-3/4
16	16	1.00	5-1/4	5-3/4
18	16	1.13	5-3/4	6-1/4
20	20	1.13	6-1/4	6-3/4
24	20	1.25	6-3/4	7-1/4

ANSI 150 Flange Size

Nominal Pipe Size (in)	Class 150
Nominal Pipe Size (in)	Dia of Flange (in)	No. of Bolts	Dia of Bolts (in)	Dia of Bolt Holes (in)	Bolt Circle (in)
1/4	3-3/8	4	1/2	0.62	2-1/4
1/2	3-1/2	4	1/2	0.62	2-3/8
12	19	12	7/8	1	17
14	21	12	1	1.12	18-3/4
16	23-1/2	16	1	1.12	21-1/4
3	7-1/2	4	5/8	0.75	6
3-1/2	8-1/2	8	5/8	0.75	7
4	9	8	5/8	0.75	7-1/2
5	10	8	3/4	0.88	8-1/2
6	11	8	3/4	0.88	9-1/2
8	13-1/2	8	3/4	0.88	11-3/4
10	16	12	7/8	1	14-1/4
3/4	3-7/8	4	1/2	0.62	2-3/4
1	4-1/4	4	1/2	0.62	3-1/8
1-1/4	4-5/8	4	1/2	0.62	3-1/2
1-1/2	5	4	1/2	0.62	3-7/8
2	6	4	5/8	0.75	4-3/4
2-1/2	7	4	5/8	0.75	5-1/2
18	25	16	1-1/8	1.25	22-3/4
20	27-1/2	20	1-1/8	1.25	25
24	32	20	1-1/4	1.38	29-1/2

ASA 150 Flange Full Form

ASA Stand for American Standard Association 150 Flange

ASA B16.5 150# Flanges Thickness

Nominal Pipe Size	Dia. of Bolt Holes	“A” (O.D.)	“B” (Thickness.)	“C” (RF Dia.)	“D” (B.C.D.)	# Bolt Holes	Approx. Wght
1-1/2″	5/8	5	11/16	2-7/8	3-7/8	4	3
2″	3/4	6	3/4	3-5/8	4-3/4	4	4
2-1/2″	3/4	7	7/8	4-1/8	5-1/2	4	7
3″	3/4	7-1/2	15/16	5	6	4	9
3-1/2″	3/4	8-1/2	15/16	5-1/2	7	8	13
1/2″	5/8	3-1/2	7/16	1-3/8	2-3/8	4	2
3/4″	5/8	3-7/8	1/2	1-11/16	2-3/4	4	2
1″	5/8	4-1/4	9/16	2	3-1/8	4	2
1-1/4″	5/8	4-5/8	5/8	2-1/2	3-1/2	4	3
4″	3/4	9	15/16	6-3/16	7-1/2	8	17
5″	7/8	10	15/16	7-5/16	8-1/2	8	20
6″	7/8	11	1	8-1/2	9-1/2	8	27
8″	7/8	13-1/2	1-1/8	10-5/8	11-3/4	8	47
10″	1	16	1-3/16	12-3/4	14-1/4	12	67
12″	1	19	1-1/4	15	17	12	123
14″	1-1/8	21	1-3/8	16-1/4	18-3/4	12	139
16″	1-1/8	23-1/2	1-7/16	18-1/2	21-1/4	16	187
18″	1-1/4	25	1-9/16	21	22-3/4	16	217
20″	1-1/4	27-1/2	1-11/16	23	25	20	283
24″	1-3/8	32	1-7/8	27-1/4	29-1/2	20	415

ASA 150 Flange Application

Refineries
Chemical Plants
Power Generation
Water Treatment Plants
Pulp and Paper Industry
Gas Processing
Heat Exchangers
Pharmaceuticals

ASA 150 Lb Flange Weight Chart

CLASS	Nominal Pipe Size	Socket Weld	Blind	Weld Neck	Slip On	Threaded	Lap Joint
150 lb	½	2	2	2	1	1	1
	¾	2	2	2	2	2	2
	5	15	20	21	15	15	15
	6	19	27	26	19	19	19
	8	30	47	42	30	30	30
	10	43	70	54	43	43	43
	12	64	123	88	64	64	64
	14	90	140	114	90	90	105
	16	98	180	140	106	98	140
	18	130	220	165	130	130	160
	1	2	2	3	2	2	2
	1¼	3	3	3	3	3	3
	1½	3	4	4	3	3	3
	2	5	5	6	5	5	5
	2½	8	7	10	8	8	8
	3	9	9	11.5	9	9	9
	3½	11	13	12	11	12	11
	4	13	17	16.5	13	13	13
	20	165	285	197	165	165	195
	22	185	355	225	185	185	245
	24	220	430	268	220	220	275

Class 150 Flange Bolt Chart

150 LB. Flanges
Nominal Pipe Size	Length of Stud	# Bolts or Studs	Dia of Bolts or Studs
	1/16 RF			RTJ
1/2	2-1/4	4	0.50	–
2-1/2	3-1/2	4	0.63	4
3	3-1/2	4	0.63	4
3-1/2	3-1/2	8	0.63	4
4	3-1/2	8	0.63	4
5	3-3/4	8	0.75	4-1/4
6	4	8	0.75	4-1/2
8	4-1/4	8	0.75	4-3/4
10	4-1/2	12	0.88	5
12	4-3/4	12	0.88	5-1/4
3/4	2-1/2	4	0.50	–
1	2-1/2	4	0.50	3
1-1/4	2-3/4	4	0.50	3-1/4
1-1/2	2-3/4	4	0.50	3-1/4
2	3-1/4	4	0.63	3-3/4
14	5-1/4	12	1.00	5-3/4
16	5-1/4	16	1.00	5-3/4
18	5-3/4	16	1.13	6-1/4
20	6-1/4	20	1.13	6-3/4
24	6-3/4	20	1.25	7-1/4

MS Flange ASA 150 PCD Chart

Pipe NB in inch	Flange OD in inch	Bolt PCD in inch	No. of Bolts	Bolt Size in inch
1/2	3 1/2	2 3/8	4	1/2
1	4 1/4	3 1/8	4	1/2
2	6	4 3/4	4	5/8
4	9	7 1/2	8	5/8
6	11	9 1/2	8	3/4
8	13 1/2	11 3/4	8	3/4
10	16	14 1/4	12	7/8
12	19	17	12	7/8
14	21	18 3/4	12	1

ASA 150 RF Slip-On Flanges Thickness Chart

Size NB	Outer diameter of Flange	Thickness
Inch	millimetre	millimetre
15	85	15
20	99	13
25	109	15
32	118	16
40	128	18
50	153	19.5
65	176	23.9
80	191	24
100	226	24
125	259	24
150	275	26
200	340	28
250	403	31
300	480	32
350	532	35
400	592	37
450	630	40
500	690	43

Importance of the ASA 150# Flanges

Table of contents

ANSI/ ASME/ ASA 150LB Flange Specification

ASME B16.5 Class 150 Blind Flange Dimensions

Types of 150# ASA Flanges as per ANSI B16.47 Series A and B16.5

ASA 150 MS Flange Dimensions

Most Common Material and Standard of Class 150 Flanges used in Petrochemical Industry