Angle Face Ring Flanges | ASME B16.5 | Custom Forged

PM Industries manufactures, supplies, and stocks Angle Face Ring Flanges in a range of materials, pressure ratings, and pipe sizes. An angle face ring flange has a sealing face machined with a specific angular profile rather than the flat raised face or groove geometry of standard ASME flange types. That angled face mates with a complementary ring gasket or with a matching angled face on the mating flange, creating a controlled line-contact or narrow-band sealing geometry that develops high gasket seating stress from relatively low bolt loads.

The sealing principle is similar in concept to the ring type joint flange, where concentrated contact stress on a metal ring produces a reliable seal without requiring the gasket seating area to be excessively large. The angle face achieves a comparable effect in specific applications where standard raised face gasket arrangements or RTJ configurations are not the preferred or practical choice. The angular face geometry guides the ring or mating face into position during assembly, which also supports accurate alignment of the joint.

Sealing efficiency under variable loading conditions is the practical reason angle face ring flanges are specified for particular applications. In systems subject to pressure cycling, thermal cycling, or vibration that cause conventional flat gasket joints to work loose or leak over time, the concentrated contact seating geometry of an angle face joint maintains effective sealing stress with less sensitivity to the small flange face movements that accompany those load variations. The angular profile keeps the ring or mating face in consistent contact through those movements.

High-pressure steam and process gas service are the most consistent application areas. Systems carrying steam, high-pressure process gases, and other compressible fluids are particularly sensitive to flange joint leakage because even a small gap in the gasket contact allows significant flow. The concentrated seating stress of an angle face ring joint provides better leak resistance in those services than a standard flat gasket joint at equivalent bolt load.

Dimensional accuracy at the face is the manufacturing requirement that determines whether the joint works properly. The angle, the ring contact radius, and the face surface finish must all be held within specified tolerances. A flange with an incorrectly machined angle won't mate properly with the ring or mating face, and the sealing performance will be compromised regardless of how the bolts are tightened. PM Industries machines angle face flanges to drawing requirements with appropriate tolerances and surface finish for reliable seating.

Angle face ring flanges are manufactured to customer drawings and applicable specifications with full material certification. Contact PM Industries for face geometry, material selection, pressure rating, pipe size, and pricing.

Specification-Slip On Flange

Standards	ANSI/ASME B16.5, B16.48, GOST, DIN, EN-1092, B16.47 Series A & B, AWWA, BS Flanges
JIS Standard	5K, 10K, 16K, 20K, 30K, 40K, 63K
DIN Flanges	DIN 2527, 2627, 2631, 2656, 2576, 2673, 2629, 2628, 2566

Flanges are Available in Following Materials

Stainless Steel	SS 201, SS 202, SS 301, SS 304, SS 304L, SS 310, SS 310S, SS 316L, SS 316TI, SS 317, SS 317L, SS 321, SS 347, SS 409, SS 409M, SS 409L, SS 410, SS 410S, SS 420, SS 430, SS 431, SS 441, SS 444, SS 446, SS 17-4PH, SS 904L.
Duplex Steel	UNS S32205, UNS S31803 Flange
Super Duplex Steel	UNS S32750, UNS S32760 Flanges
Carbon Steel	Carbon steel A105 Flanges, A36 Flanges, IS 2062 Flanges, A350 LF2 Flanges, F42 Flanges, F52 Flanges, F56 Flanges, F60 Flanges, F65 Flanges, F70 Flanges, F80 Flanges, IBR flanges, A694 Flanges, SS400, SF440, ST37-2 Flanges, S235JrG2 Flanges, P250GH Flanges, C22.8 Flanges, etc.
Alloys Steel	Alloy 20, F1, F5, F9, F11, F22, F91 Flanges
Copper Alloys	Cu-Ni 70/30, Cu-Ni 90/10, C 24000, C 75700, C 51100, C 22000, C 27200, C 21000, C 26800, C 52100, C 77000, C 52000, C 11000, C 74500, C 23000, C 28000, C 12200, C 76400, C 51900, C 75400, C 26000, C 51000, C 10200, C 27000
Nickel Alloys	Nickel 200, 201
Inconel	Inconel 600, 601, 625, 718, 800, 825, X-750
Monel	Monel 400, k500
Hastelloy	Hastelloy C-22, C-276, C-4, X
Titanium	Grade 1, 4, 5(Ti 6Al-4V), 6(Ti 5Al-2.5Sn), 7, 11, 6Al-2Sn-4Zr-2Mo, Grade 12, 6Al-6V-25n, Grade 23(Ti 6AL-4V ELI), 8Ai-1Mo-1V, Grade 5 ELI, Grade 9(3Al-2.5V), 6Al-7Nb.
Aluminium	6063, 1100, 6082 A96082, 1050, 2017, 2024 A92024, 7050 A97050, 5083 A95083, 2014A A92014, 2011 A92011, 6061 A96061 A86061, 5754, 7085, 2050, 7071 7020, 7178, 5052 A95052, 7150, 7075 A97075 A87075, 7575, 2219, 7175
Pressure Rating	Class 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS
Types	Threaded, Plate, Screwed, Forged.
Supporting material	Gasket, Ring Joint, Flange Bolts
Size range	1/2" (15 NB) to 48" (1200NB) DN10~DN5000
High Temperature	Above 200°C (400°F) For Class 150 Or Above 400°C (750°F)
Low Temperature	Above -29 Degree C (−20°F)
Production technique	Forged, machined and Heat treated
Custom design	As per your drawing
Origin	Indian / USA / Korean / West Europe / Japan
Pressure Class	PN 6 TO PN 100
Coating/Surface Treatment:	Zinc Plated, Anti-rust Paint, Oil Black Paint, Yellow Transparent, Cold and Hot Dip Galvanized.
European/African/Russian Standard Flanges	Available
Test	Direct-reading Spectrograph, X-ray detector, UItrasonic flaw detector, Magnetic particle detector, Hydrostatic testing machine.
Marking Standard	Name of Manufacturer
	Schedule
	Type of Flange Facing
	Pressure Class
	Nominal Pipe Size, etc
Test Certificates	EN 10204/3.1B, NACE MR0103, NACE MR0175
	Raw Materials Certificate
	100% Radiography Test Report
	Third Party Inspection Report, etc

Dimension - ASME B16.5 Angle Face Rings Flanges

Nominal Bore Angle Face Rings Flanges	Dia. (D)	Thick. (E)	Dia. (B)	Dia. (A)	Height (H)	Nbr	Holes	Dia. (C)
1/2″	90	11.2	30	22.9	16	4	15.87	60.3
3/4″	100	12.7	38	28.2	16	4	15.87	69.9
1″	110	14.3	49	34.9	17	4	15.87	79.4
1 1/4″	115	15.9	59	43.7	21	4	15.87	88.9
1 1/2″	125	17.5	65	50.0	22	4	15.87	98.4
2″	150	20.7	78	62.5	25	4	19.05	120.7
2 1/2″	180	22.3	90	75.4	29	4	19.05	139.7
3″	190	23.9	108	91.4	30	4	19.05	152.4
3 1/2″	215	23.9	122	104.1	32	8	19.05	177.8
4″	230	23.9	135	116.8	33	8	19.05	190.5
5″	255	23.9	164	144.4	36	8	22.22	215.9
6″	280	25.4	192	171.4	40	8	22.22	241.3
8″	345	28.6	246	222.2	44	8	22.22	298.5
10″	405	30.2	305	277.4	49	12	25.40	362.0
12″	485	31.8	365	328.2	56	12	25.40	431.8
14″	535	35.0	400	360.2	79	12	28.57	476.3
16″	595	36.6	457	411.2	87	16	28.57	539.8
18″	635	39.7	505	462.3	97	16	31.75	577.9
20″	700	42.9	559	514.4	103	20	31.75	635.0
24″	815	47.7	663	616.0	111	20	34.92	749.3

Weight Chart Of Angle Face Rings Flanges

Nominal Size	Diameter		Flange I.D	No. of holes	Flange Dia	Thk of Flange	Dia of Bolt Circle	Dia of Bolt Holes	Approx.Weight
DN	ISO	DIN	D5	BN	D	b	K	d2	KG/PCS
10	-	14	14.5	4	90	16	60	14	0.7
17.2	-	17.7	4	90	16	60	14	0.69
15	-	20	21	4	95	16	65	14	0.77
21.3	-	22	4	95	16	65	14	0.77
20	-	25	26	4	105	18	75	14	1.06
26.9	-	27.6	4	105	18	75	14	1.05
25	-	30	31	4	115	18	85	14	1.27
33.7	-	34.4	4	115	18	85	14	1.25
32	-	38	39	4	140	18	100	18	1.86
42.4	-	43.1	4	140	18	100	18	1.83
40	-	44.5	45.5	4	150	18	110	18	2.12
48.3	-	49	4	150	18	110	18	2.09
50	-	57	58.1	4	165	20	125	18	2.78
60.3	-	61.1	4	165	20	125	18	2.74
65	76.1	-	77.1	8	185	22	145	18	3.48
80	88.9	-	90.3	8	200	24	160	18	4.33
100	-	108	109.6	8	235	24	190	22	5.82
114.3	-	115.9	8	235	24	190	22	5.61
125	-	133	134.8	8	270	26	220	26	7.91
139.7	-	141.6	8	270	26	220	26	7.6
150	-	159	161.1	8	300	28	250	26	10.12
168.3	-	170.5	8	300	28	250	26	9.58
175	193.7	-	196.1	12	350	32	295	30	14.45
200	219.1	-	221.8	12	375	34	320	30	16.9
250	-	267	270.2	12	450	38	385	33	27.28
273	-	276.2	12	450	38	385	33	26.51
300	323.9	-	327.6	16	515	42	450	33	36.38
350	355.6	-	359.7	16	580	46	510	36	52.83
-	368	372.2	16	580	46	510	36	50.24
400	406.4	-	411	16	660	50	585	39	74.71
-	419	423.7	16	660	50	585	39	71.44
500	508	-	513.6	20	755	52	670	42	86.87
600	610	-	616.5	20	890	54	795	48	121.84
700	711	-	716	24	995	58	900	48	150.93
800	813	-	818	24	1140	64	1030	56	219.08
900	914	-	920	28	1250	70	1140	56	271.16
1000	1016	-	1022	28	1360	78	1250	56	344.95

Class 600 SORF Flange Dimensions

Normal pipe size	Inside Diameter	Outside Diameter	Bolt circle	Raised Face	Raised Face	H	Raised Face thickness	T1	Flat face thickness	Bolt Hole	Number of Bolt holes
1	1.36	4.88	3.50	2.00	.250	2.12	1.31	0.69	1.06	0.75	4
1/2	0.88	3.75	2.62	1.38	.250	1.50	1.13	0.56	0.88	0.62	4
3/4	1.09	4.62	3.25	1.69	.250	1.88	1.25	0.62	1.00	0.75	4
1-1/4	1.7	5.25	3.88	2.50	.250	2.50	1.37	0.81	1.12	0.75	4
3	3.57	8.25	6.62	5.00	.250	4.62	2.06	1.25	1.81	0.88	8
1-1/2	1.95	6.12	4.50	2.88	.250	2.75	1.50	0.88	1.25	0.88	4
2	2.44	6.50	5.00	3.62	.250	3.31	1.69	1.00	1.44	0.75	8
2-1/2	2.94	7.50	5.88	4.12	.250	3.94	1.87	1.12	1.62	0.88	8
3-1/2	4.07	9.00	7.25	5.50	.250	5.25	2.19	1.38	1.94	1.00	8
8	8.72	16.50	13.75	10.62	.250	10.75	3.25	2.19	3.00	1.25	12
4	4.57	10.75	8.50	6.19	.250	6.00	2.37	1.5	2.12	1.00	8
5	5.66	13.00	10.50	7.31	.250	7.44	2.63	1.75	2.38	1.12	8
6	6.72	14.00	11.50	8.50	.250	8.75	2.87	1.88	2.62	1.12	12
10	10.88	20.00	17.00	12.75	.250	13.5	3.63	2.50	3.38	1.38	16
12	12.88	22.00	19.25	15.00	.250	15.75	3.87	2.62	3.62	1.38	20
14	14.14	23.75	20.75	16.25	.250	17.00	3.94	2.75	3.69	1.50	20
22	22.22	34.25	30.63	25.25	.250	26.25	5.50	3.75	5.25	1.75	24
16	16.16	27.00	23.75	18.50	.250	19.50	4.44	3.00	4.19	1.62	20
24	24.25	37.00	33.00	27.25	.250	28.25	5.75	4.00	5.50	2.00	24
18	18.18	29.25	25.75	21.00	.250	21.50	4.87	3.25	4.62	1.75	20
20	20.20	32.00	28.50	23.00	.250	24.00	5.25	3.50	5.00	1.75	24

ASME B16.5 Class 900 Slip On Flange Dimensions

Normal pipe size	Inside diameter	Outside diameter	Bolt circle	Raised Face	Raised Face	H	Raised Face thickness	T1	Face flat thickness	Bolt hole	Number of bolt holes
6	6.72	15.00	12.50	8.50	.250	9.25	3.63	2.19	3.38	1.25	12
3	3.57	9.50	7.50	5.00	.250	5.00	2.38	1.50	2.13	1.00	8
5	5.66	13.75	11.00	7.31	.250	7.50	3.38	3.00	3.13	1.38	8
16	16.16	27.75	24.25	18.50	.250	20.00	5.50	3.50	5.25	1.75	20
8	8.72	18.50	15.50	10.63	.250	11.75	4.25	2.50	4.00	1.50	12
10	10.88	21.50	18.50	12.75	.250	14.50	4.50	2.75	4.25	1.50	16
4	4.57	11.50	9.25	6.19	.250	6.25	3.00	1.75	2.75	1.25	8
24	24.25	41.00	35.50	27.25	.250	29.50	8.25	5.50	8.00	2.63	20
12	12.88	24.00	21.00	15.00	.250	16.50	4.88	3.13	4.63	1.50	20
14	14.14	25.25	22.00	16.25	.250	17.75	5.38	3.38	5.13	1.63	20
18	18.18	31.00	27.00	21.00	.250	22.25	6.25	4.00	6.00	2.00	20
20	20.20	33.75	29.50	23.00	.250	24.50	6.50	4.25	6.25	2.13	20

Slip On Flange Weight Chart In Kg

Nominal Pipe Size		Dimension		Weight in Kg
Normal Pipe Size (Inche)	Diameter Nominal	Flange Outer Diameter in MM	Flange Thickness in MM	Socket Weld	Weld Neck	Blind
8	200	342.9	28.4	12.1	17.6	19.6
3/4	20	98.6	12.7	0.6	0.7	0.6
1	25	108	14.2	0.8	1	0.9
1 1/4	32	117.3	15.7	1	1.3	1.2
1 1/2	40	127	17.5	1.3	1.7	1.5
2	50	152.4	19.1	2.1	2.6	2.4
2 1/2	65	177.8	22.4	3.3	4.1	3.9
1/2	15	88.9	11.2	0.4	0.5	0.4
3	80	190.5	23.9	3.9	4.9	4.9
24	600	812.8	47.8	86.9	115	185.0
3 1/2	90	215.9	23.9	4.8	6.1	6.2
4	100	228.6	23.9	5.3	6.8	7.0
5	125	254	23.9	6.1	8.6	8.6
6	150	279.4	25.4	7.5	10.6	11.3
10	250	406.4	30.2	16.5	24	28.6
14	350	533.4	35.1	34.6	48.4	58.1
12	300	482.6	31.8	26.2	36.5	43.2
16	400	596.9	36.6	44.8	60.6	76.1
18	450	635	39.6	48.9	68.3	93.7
20	500	698.5	42.9	61.9	84.5	122.0

SS SORF Flange Pressure Rating

Nominal Pipe Size	Class #150			Class #300			Class #600			Class #900			Class #1500			Class #2500
	Weld Neck	Slip on	Blind	Weld Neck	Slip on	Blind	Weld Neck	Slip on	Blind	Weld Neck	Slip on	Blind	Weld Neck	Slip on	Blind	Weld Neck	Slip on	Blind
1/2"	2	1	1	2	1	1	2	2	2	1500# WEIGHTS			5	4	4	7	7	7
3/4"	2	2	2	3	3	3	4	3	3	1500# WEIGHTS			6	5	6	8	8	8
1"	3	2	2	4	3	3	4	4	4	1500# WEIGHTS			9	8	8	12	11	11
1 1/2"	4	3	3	7	6	6	8	7	8	1500# WEIGHTS			13	12	13	25	22	23
2"	6	5	5	9	7	8	12	9	10	1500# WEIGHTS			25	25	25	42	37	39
2 1/2"	8	7	7	12	10	12	18	13	15	1500# WEIGHTS			36	36	35	52	55	56
3"	10	8	9	15	13	16	23	16	20	31	26	29	48	48	48	94	83	86
4"	15	13	17	25	22	27	42	37	41	53	53	54	73	73	73	145	125	130
5"	19	15	20	32	28	35	68	63	68	86	83	87	130	130	140	245	210	225
8"	39	30	45	67	58	81	120	115	140	175	170	200	275	260	300	580	485	530
6"	24	19	26	42	39	50	81	80	86	110	110	115	165	165	160	380	325	345
10"	52	43	70	91	81	124	190	170	230	260	245	290	455	435	510	1075	930	1025
18"	150	130	220	320	250	395	475	400	630	680	600	850	1625	NA	1750	NA	NA	NA
12"	80	64	110	140	115	185	225	200	295	325	325	415	690	580	690	1525	1100	1300
24"	260	220	430	580	475	790	830	730	1250	1500	1400	2025	3325	NA	3625	NA	NA	NA
14"	110	90	140	180	165	250	280	230	355	400	400	520	940	NA	975	NA	NA	NA
16"	140	98	180	250	190	295	390	330	495	495	425	600	1250	NA	1300	NA	NA	NA
20"	180	165	285	400	315	505	590	510	810	830	730	1075	2050	NA	2225	NA	NA	NA
22"	225	185	355	465	370	640	720	590	1000	NA	NA	NA	NA	NA	NA	NA	NA	NA