ASME B16.48 Figure-8 Blank | Spectacle Blind | Male RTJ

Technical Drawing

Oval or octagonal ring shapes may be provided. Only the oval ring is illustrated in the technical drawing for simplicity. Ring dimensions shall be in accordance with ASME B16.20, except H = C + T, where C is the ring height specified in ASME B16.20. The thickness of the tie bar t, shall be capable of supporting the weight of the blank in all orientations without permanent deformation to the tie bar.

Dimensions & Weights

NPS	A	T	W	B
1	80	6.4	51	34
1-1/4	90	6.4	51	42
1-1/2	100	6.4	57	48
2	120	6.4	57	61
2-1/2	140	9.7	57	73
3	150	9.7	57	89
3-1/2	175	9.7	64	102
4	190	9.7	64	114
5	215	12.7	70	141
6	240	12.7	83	168
8	300	15.7	95	219
10	362	19.1	102	273
12	432	22.4	121	324
14	476	22.4	127	356
16	540	25.4	127	406
18	578	28.4	127	457
20	635	28.4	127	508
24	749	35.1	152	610

* Basic dimensions for ASME B16.48 Class 150 figure-8 blanks (spectacle blind flanges) with male ring-joint facing (M/RTJ).

NPS	A	T	W	B
1/2	65	6.4	38	21
3/4	80	9.7	45	27
1	90	9.7	51	34
1-1/4	100	9.7	51	42
1-1/2	115	9.7	57	48
2	125	12.7	57	61
2-1/2	150	15.7	57	73
3	170	15.7	57	89
3-1/2	180	15.7	64	102
4	200	15.7	64	114
5	235	19.1	76	141
6	270	22.4	83	168
8	330	25.4	95	219
10	390	28.4	102	273
12	450	35.1	121	324
14	515	38.1	127	356
16	570	41.1	127	406
18	630	44.5	127	457
20	685	50.8	127	508
24	810	57.2	152	610

* Basic dimensions for ASME B16.48 Class 300 figure-8 blanks (spectacle blind flanges) with male ring-joint facing (M/RTJ).

NPS	A	T	W	B
1/2	65	6.4	38	21
3/4	80	9.7	45	27
1	90	9.7	51	34
1-1/4	100	9.7	57	42
1-1/2	115	9.7	57	48
2	125	12.7	51	61
2-1/2	150	15.7	57	73
3	170	15.7	67	89
3-1/2	180	19.1	67	102
4	215	19.1	73	114
5	265	22.4	73	141
6	290	28.4	73	168
8	350	35.1	83	219
10	430	41.1	121	273
12	490	47.8	121	324
14	525	50.8	121	356
16	605	57.2	127	406
18	650	63.5	133	457
20	720	69.9	127	508
24	840	82.6	152	610

* Basic dimensions for ASME B16.48 Class 600 figure-8 blanks (spectacle blind flanges) with male ring-joint facing (M/RTJ).

NPS	A	T	W	B
1/2	80	9.7	38	21
3/4	90	9.7	45	27
1	100	9.7	51	34
1-1/4	110	12.7	54	42
1-1/2	125	12.7	54	48
2	165	15.7	51	61
2-1/2	190	19.1	54	73
3	190	19.1	67	89
4	235	25.4	73	114
5	280	28.4	73	141
6	315	31.8	73	168
8	395	41.1	79	219
10	470	47.8	121	273
12	535	57.2	121	324
14	560	60.5	121	356
16	615	69.9	127	406
18	685	76.2	133	457
20	750	85.9	127	508
24	900	98.6	152	610

* Basic dimensions for ASME B16.48 Class 900 figure-8 blanks (spectacle blind flanges) with male ring-joint facing (M/RTJ).

NPS	A	T	W	B
1/2	83	9.7	38	21
3/4	89	9.7	45	27
1	102	12.7	54	34
1-1/4	111	12.7	54	42
1-1/2	124	15.7	57	48
2	165	19.1	54	61
2-1/2	191	22.4	57	73
3	203	28.4	73	89
4	241	31.8	76	114
5	292	38.1	76	141
6	318	41.1	79	168
8	394	50.8	86	219
10	483	63.5	133	273
12	572	73.2	133	324
14	635	79.2	140	356
16	705	88.9	146	406
18	775	98.6	152	457
20	832	108.0	165	508
24	991	127.0	178	610

* Basic dimensions for ASME B16.48 Class 1500 figure-8 blanks (spectacle blind flanges) with male ring-joint facing (M/RTJ).

NPS	A	T	W	B
1/2	90	12.7	41	21
3/4	95	15.7	48	27
1	110	15.7	54	34
1-1/4	130	19.1	54	42
1-1/2	145	22.4	61	48
2	170	25.4	57	61
2-1/2	195	28.4	61	73
3	230	31.8	76	89
4	270	38.1	83	114
5	325	47.8	89	141
6	370	57.2	95	168
8	440	69.9	95	219
10	540	82.6	95	273
12	620	98.6	152	324

* Basic dimensions for ASME B16.48 Class 2500 figure-8 blanks (spectacle blind flanges) with male ring-joint facing (M/RTJ).

NPS	150#	300#	600#
1/2	0.11	0.23	0.34
3/4	0.15	0.34	0.51
1	0.21	0.42	0.66
1-1/4	0.44	0.51	1.11
1-1/2	0.57	0.68	1.49
2	0.86	1.32	2.10
2-1/2	0.96	1.78	3.25
3	1.43	2.35	4.38
3-1/2	2.70	3.54	5.81
4	3.17	4.26	8.10
5	3.91	7.14	13.80
6	6.00	9.51	18.95
8	9.17	19.04	32.17
10	15.83	28.47	57.97
12	27.28	42.40	85.39
14	33.12	64.17	104.73
16	49.60	92.03	154.61
18	61.36	120.31	189.33
20	81.88	153.77	269.92
24	125.27	242.47	402.87

*  Weights for spectacle blinds in sizes NPS 1/2″ through 24″ of Class 150, 300 & 600.

NPS	900#	1500#	2500#
1/2	0.41	0.42	0.64
3/4	0.55	0.71	0.80
1	0.72	0.94	1.07
1-1/4	1.23	1.26	1.93
1-1/2	1.55	1.87	2.85
2	3.59	3.63	4.41
2-1/2	4.69	5.59	6.75
3	6.02	7.62	10.63
4	10.31	12.22	18.40
5	16.34	21.26	30.61
6	24.33	31.01	44.98
8	48.13	54.12	84.71
10	79.48	97.90	154.15
12	117.80	164.36	241.44
14	140.91	220.76	-
16	187.84	305.66	-
18	250.92	411.77	-
20	325.57	512.32	-
24	557.13	843.24	-

*  Weights for spectacle blinds in sizes NPS 1/2″ through 24″ of Class 900, 1500 & 2500.

ASME B16.48 Line Blanks
Figure-8	FF/RF	F/RTJ	M/RTJ
Spade	FF/RF	F/RTJ	M/RTJ
Spacer	FF/RF	F/RTJ	M/RTJ

*  Click to view more technical details for ASME B16.48 line blanks.