Metric Dimensions of Raised Face Line Blanks as per ASME B16.48

Blinds, Spacers and Spectacle Blinds are used for the purpose of positive shut off of a piping system where mere shut off using valves is not sufficient as valves are prone to leakage. These are generally used in hazardous services like hydrocarbon fluids.

This page provides metric dimensions of Raised Face Line Blanks as per ASME B16.48

150# | 300# | 400# | 600# | 900# | 1500# | 2500#

150# RF Line Blanks

Raised Face Line Blanks Dimensions Header

NPS	B Inside Diameter	O Outside Diameter	A Center to Center	t Blank Thickness	W Web Width
1/2	NA	NA	NA	NA	NA
3/4	NA	NA	NA	NA	NA
1	34	64	80	19.1	51
1-1/4	42	73	90	19.1	51
1-1/2	48	83	100	19.1	57
2	61	102	120	19.1	57
2-1/2	73	121	140	22.4	57
3	89	133	150	22.4	57
3-1/2	102	154	175	22.4	64
4	114	172	190	22.4	64
5	141	194	215	25.4	70
6	168	219	240	25.4	83
8	219	273	300	28.4	95
10	273	330	360	31.8	102
12	324	406	430	35.1	121
14	356	426	475	35.1	127
16	406	483	540	38.1	127
18	457	546	580	41.1	127
20	508	597	635	41.1	127
24	610	711	750	47.8	152

150# | 300# | 400# | 600# | 900# | 1500# | 2500#

300# RF Line Blanks

NPS	B Inside Diameter	O Outside Diameter	A Center to Center	t Blank Thickness	W Web Width
1/2	16	51	65	6.4	38
3/4	21	64	80	6.4	38
1	27	70	90	6.4	38
1-1/4	42	79	100	6.4	38
1-1/2	48	92	115	6.4	38
2	61	108	125	9.7	51
2-1/2	73	127	150	9.7	51
3	89	146	170	9.7	64
3-1/2	102	162	185	12.7	64
4	114	178	200	12.7	64
5	141	213	235	15.7	76
6	168	248	270	15.7	76
8	219	305	330	22.4	76
10	273	359	385	25.4	102
12	324	419	450	28.4	102
14	356	483	515	31.8	108
16	406	536	570	38.1	108
18	457	594	630	41.1	114
20	508	651	685	44.5	121
24	610	772	810	50.8	140

150# | 300# | 400# | 600# | 900# | 1500# | 2500#

400# RF Line Blanks

NPS	B Inside Diameter	O Outside Diameter	A Center to Center	t Blank Thickness	W Web Width

150# | 300# | 400# | 600# | 900# | 1500# | 2500#

600# RF Line Blanks

NPS	B Inside Diameter	O Outside Diameter	A Center to Center	t Blank Thickness	W Web Width
1/2	16	51	65	6.4	38
3/4	21	64	80	6.4	38
1	27	70	90	6.4	57
1-1/4	37	79	100	9.7	57
1-1/2	43	92	115	9.7	67
2	55	108	125	9.7	57
2-1/2	67	127	150	12.7	67
3	83	146	170	12.7	67
3-1/2	96	159	185	15.7	76
4	108	191	215	15.7	76
5	135	238	265	19.1	86
6	162	264	290	22.4	86
8	212	318	350	28.4	95
10	265	397	430	35.1	105
12	315	454	490	41.1	105
14	346	489	525	44.5	114
16	397	562	605	50.8	124
18	448	610	655	53.8	133
20	497	679	725	63.5	133
24	597	787	840	73.2	152

150# | 300# | 400# | 600# | 900# | 1500# | 2500#

900# RF Line Blanks

NPS	B Inside Diameter	O Outside Diameter	A Center to Center	t Blank Thickness	W Web Width
1/2	16	60	80	6.4	38
3/4	21	67	90	6.4	41
1	27	76	100	6.4	57
1-1/4	37	86	110	9.7	57
1-1/2	43	95	125	9.7	67
2	55	140	165	12.7	57
2-1/2	67	162	190	12.7	67
3	83	165	190	15.7	67
4	108	203	235	19.1	76
5	135	244	280	22.4	86
6	162	286	320	25.4	86
8	212	356	395	35.1	95
10	265	432	470	41.1	105
12	315	495	535	47.8	105
14	346	518	560	53.8	114
16	397	572	615	60.5	124
18	448	635	685	66.5	133
20	497	696	750	73.2	133
24	597	835	900	88.9	152

150# | 300# | 400# | 600# | 900# | 1500# | 2500#

1500# RF Line Blanks

NPS	B Inside Diameter	O Outside Diameter	A Center to Center	t Blank Thickness	W Web Width
1/2	16	61	80	6.4	38
3/4	21	67	90	9.7	41
1	27	76	100	9.7	64
1-1/4	35	86	110	9.7	64
1-1/2	41	95	125	12.7	70
2	53	140	165	12.7	70
2-1/2	63	162	190	15.7	76
3	78	172	205	19.1	76
4	102	206	240	22.4	89
5	128	251	290	28.4	89
6	154	279	320	35.1	89
8	203	349	395	41.1	102
10	255	432	480	50.8	114
12	303	518	570	60.5	114
14	333	575	635	66.5	127
16	381	638	705	76.2	133
18	429	702	775	85.9	146
20	478	752	830	95.3	152
24	575	899	990	111.3	178

150# | 300# | 400# | 600# | 900# | 1500# | 2500#

2500# RF Line Blanks

NPS	B Inside Diameter	O Outside Diameter	A Center to Center	t Blank Thickness	W Web Width
1/2	16	67	90	9.7	38
3/4	21	73	95	9.7	41
1	27	83	110	9.7	64
1-1/4	35	102	130	12.7	64
1-1/2	41	114	145	15.7	70
2	53	143	170	15.7	70
2-1/2	63	165	195	19.1	76
3	78	194	230	22.4	76
4	102	232	275	28.4	89
5	128	276	325	35.1	89
6	154	314	370	41.1	89
8	198	384	440	53.8	102
10	248	473	540	66.5	114
12	289	546	620	79.2	114
NPS	B Inside Diameter	O Outside Diameter	A Center to Center	t Blank Thickness	W Web Width

150# | 300# | 400# | 600# | 900# | 1500# | 2500#

Notes

(1) Hole size (where required due to bolt spacing) shall be the same as the flange bolt hole and located such that it will not interfere with bolting between two flanges.
(2) The thickness of the web (or tie bar) dimension, Wt, shall be as determined by para. 3.1. of ASME B16.48
(3) Refer to para. 3.3.1. of ASME B16.48.

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Metric Dimensions of Raised Face Line Blanks as per ASME B16.48

150# RF Line Blanks

300# RF Line Blanks

400# RF Line Blanks

600# RF Line Blanks

900# RF Line Blanks

1500# RF Line Blanks

2500# RF Line Blanks

Notes

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