Full Face Gaskets - Class 400 - Custom Gaskets: Gasketing products | Extruded plastic profiles | EDM & CNC Machining

Dimensions of Non-Metallic Flat Gaskets for ASME/ANSI B16.5 & B16.47 Pipe Flanges

Non-metallic flanges are typically recommended for Class 150 and 300 flanges

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NPS 1/2 - 24

NPS 26 - 60 (Series A)

NPS 26 - 60 (Series B)

NPS 1/2 - 24

NPS	ID	OD	Hole Qty	Hole Size	BCD
0.5	0.84	3.75	4	0.63	2.62
0.75	1.06	4.62	4	0.75	3.25
1	1.31	4.88	4	0.75	3.5
1.25	1.66	5.25	4	0.75	3.88
1.5	1.91	6.12	4	0.88	4.5
2	2.38	6.5	8	0.75	5
2.5	2.88	7.5	8	0.88	5.88
3	3.5	8.25	8	0.88	6.62
3.5	4	9	8	1	7.25
4	4.5	10	8	1	7.88
5	5.56	11	8	1	9.25
6	6.62	12.5	12	1	10.62
8	8.62	15	12	1.12	13
10	10.75	17.5	16	1.25	15.25
12	12.75	20.5	16	1.38	17.75
14	14	23	20	1.38	20.25
16	16	25.5	20	1.5	22.5
18	18	28	24	1.5	24.75
20	20	30.5	24	1.62	27
24	24	36	24	1.88	32

NPS 26 - 60 (Series A)

NPS	ID	OD	Hole Qty	Hole Size	BCD
26	26	38.25	28	1.88	34.5
28	28	40.75	28	2	37
30	30	43	28	2.12	39.25
32	32	45.25	28	2.12	41.5
34	34	47.5	28	2.12	43.5
36	36	50	32	2.12	46
38	38	47.5	32	1.88	44
40	40	50	32	2	46.25
42	42	52	32	2	48.25
44	44	54.5	32	2.12	50.5
46	46	56.75	36	2.12	52.75
48	48	59.5	28	2.38	55.25
50	50	61.75	32	2.38	57.5
52	52	63.75	32	2.38	59.5
54	54	67	28	2.62	62.25
56	56	69	32	2.62	64.25
58	58	71	32	2.62	66.25
60	60	74.25	32	2.88	69

NPS 26 - 60 (Series B)

NPS	ID	OD	Hole Qty	Hole Size	BCD
26	26	33.5	28	1.5	30.75
28	28	36	24	1.62	33
30	30	38.25	28	1.62	35.25
32	32	40.75	28	1.75	37.5
34	34	42.75	32	1.75	39.5
36	36	45.5	28	1.88	42
38	38	47.5	32	1.88	44
40	40	50	32	2	46.25
42	42	52	32	2	48.25
44	44	54.5	32	2.12	50.5
46	46	56.75	36	2.12	52.75
48	48	59.5	28	2.38	55.25
50	50	61.75	32	2.38	57.5
52	52	63.75	32	2.38	59.5
54	54	67	28	2.62	62.25
56	56	69	32	2.62	64.25
58	58	71	32	2.62	66.25
60	60	74.25	32	2.88	69

NPS = Nominal Pipe Size
ID = Inner Diameter
OD = Outer Diameter
BCD = Bolt Circle Diameter

General Note:
All dimensions are in inches.
Larger sizes as well as customized sizes can be furnished.
Bolt diameter should be 1/8″ less than the bolt hole size.

Standards:
ASME B16.21 – Non-metallic flat gaskets for pipe flanges
ASME B16.5 – Pipe flanges and flanged fittings: NPS 1/2 through 24
ASME B16.47 – Large diameter steel flanges: NPS 26 through NPS 60 standard

No liability or guarantee for the correctness and completeness of the information provided

NSP 1/2 - 24

NSP 26 - 60 (Series A)

NSP 26 - 60 (Series B)

NSP 1/2 - 24

NPS	ID	OD	Hole Qty	Hole Size	BCD
0.5	0.84	3.75	4	0.63	2.62
0.75	1.06	4.62	4	0.75	3.25
1	1.31	4.88	4	0.75	3.5
1.25	1.66	5.25	4	0.75	3.88
1.5	1.91	6.12	4	0.88	4.5
2	2.38	6.5	8	0.75	5
2.5	2.88	7.5	8	0.88	5.88
3	3.5	8.25	8	0.88	6.62
3.5	4	9	8	1	7.25
4	4.5	10	8	1	7.88
5	5.56	11	8	1	9.25
6	6.62	12.5	12	1	10.62
8	8.62	15	12	1.12	13
10	10.75	17.5	16	1.25	15.25
12	12.75	20.5	16	1.38	17.75
14	14	23	20	1.38	20.25
16	16	25.5	20	1.5	22.5
18	18	28	24	1.5	24.75
20	20	30.5	24	1.62	27
24	24	36	24	1.88	32

NSP 26 - 60 (Series A)

NPS	ID	OD	Hole Qty	Hole Size	BCD
26	26	38.25	28	1.88	34.5
28	28	40.75	28	2	37
30	30	43	28	2.12	39.25
32	32	45.25	28	2.12	41.5
34	34	47.5	28	2.12	43.5
36	36	50	32	2.12	46
38	38	47.5	32	1.88	44
40	40	50	32	2	46.25
42	42	52	32	2	48.25
44	44	54.5	32	2.12	50.5
46	46	56.75	36	2.12	52.75
48	48	59.5	28	2.38	55.25
50	50	61.75	32	2.38	57.5
52	52	63.75	32	2.38	59.5
54	54	67	28	2.62	62.25
56	56	69	32	2.62	64.25
58	58	71	32	2.62	66.25
60	60	74.25	32	2.88	69

NSP 26 - 60 (Series B)

NPS	ID	OD	Hole Qty	Hole Size	BCD
26	26	33.5	28	1.5	30.75
28	28	36	24	1.62	33
30	30	38.25	28	1.62	35.25
32	32	40.75	28	1.75	37.5
34	34	42.75	32	1.75	39.5
36	36	45.5	28	1.88	42
38	38	47.5	32	1.88	44
40	40	50	32	2	46.25
42	42	52	32	2	48.25
44	44	54.5	32	2.12	50.5
46	46	56.75	36	2.12	52.75
48	48	59.5	28	2.38	55.25
50	50	61.75	32	2.38	57.5
52	52	63.75	32	2.38	59.5
54	54	67	28	2.62	62.25
56	56	69	32	2.62	64.25
58	58	71	32	2.62	66.25
60	60	74.25	32	2.88	69

NPS = Nominal Pipe Size
ID = Inner Diameter
OD = Outer Diameter
BCD = Bolt Circle Diameter

General Note:
All dimensions are in inches.
Larger sizes as well as customized sizes can be furnished.
Bolt diameter should be 1/8″ less than the bolt hole size.

No liability or guarantee for the correctness and completeness of the information provided

Sealing Solutions Since 1967

Full Face Gaskets – Class 400

Custom Configurations of Any Type Available