Note :

• MSS SP-44 flanges are designated series A flanges in ASME B16.47. It also covers flanges in the range NPS 12 to 24, these being equivalent
• to ASME /ANSI B16.5 flanges in the same range (except for the addition of NPS 22 in MSS SP-44).
• API 605 has been cancelled. API 605 flanges are designated series B flanges in ASME B16.47. Ranges quoted are based on ASME B16.47 series B.
• Dimension not covered in this summary.

Size :	1/2" TO 16"
Type :	WNRF, SORF, BLRF, Threaded etc
Dimension :	ASME B 16.5
Material :	SS304, SS304L, SS316, SS316L, SS316Ti, SS321
Pressure Rating :	150#, 300#, 600#, 900#, 1500#, 2500# Class

Description	Rated Pressure / Presión Nominal / Nenndruck (in bar) (1 bar = 14.5 psi)
	1	2.5	6	10	16	25	40	64	100	160	250	320	400
	DIN
Blind Flanges			2527	2527	2527	2527	2527	2527	2527
Slipon Flanges			2573	2576
Welding neck flanges	2630	2630	2631	2632	2633	2634	2635	2636	2637	2638	2628	2629	2627
Threaded flanges with neck			2565	2566	2566	2567	2567	2568	2569
Material :-	1.4301, 1.4306, 1.4401, 1.4404, 1.4571, 1.4841, 1.4541

JIS STANDARD, MATERIAL : SUS 304 & 316 MADE BY SAND CASTING OR FORGED THREAD CONFORM TO BS21, 1973 TAPER THREAD.
Unit : mm
DIM.\N.P.S.		15	20	25	32	40	50	65	80	100	125	150	200	250
A	5K	80	85	95	115	120	130	155	180	200	235	265	320	385
1
0	10K	95	100	125	135	140	155	175	185	210	250	280	330	400
B	5K	30	36	45	54	60	76	94	108	134	164	196	244	288
1.5
0	10K	30	36	45	54	60	76	94	108	134	164	196	244	288
C	5K	60	65	75	90	95	105	130	145	165	200	230	280	345
0.5	10K	70	75	90	100	105	120	140	150	175	210	240	290	355
D	5K	9	10	10	12	12	14	14	14	16	16	18	20	22
2
0	10K	12	14	14	16	16	16	18	18	18	20	22	22	24
E	5K	22.2	27.7	34.5	43.2	49.1	61.1	77.1	90	115.4	141.2	166.6	218	269.5
1
0	10K	22.2	27.7	34.5	43.2	49.1	61.1	77.1	90	115.4	141.2	166.6	218	269.5
F	5K	1	1	1	2	2	2	2	2	2	2	2	2	2
0.2	10K	1	1	1	2	2	2	2	2	2	2	2	2	2
R	5K	48	52	62	72	78	88	112	125	145	180	210	255	320
1	10K	52	58	70	80	85	100	120	130	155	185	215	265	325
N	5K	4	4	4	4	4	4	4	4	8	8	8	12	12
	10K	4	4	4	4	4	4	4	8	8	8	8	12	12
	5K	12	12	12	15	15	15	15	19	19	19	19	23	23
0.5
0	10K	15	15	19	19	19	19	19	19	19	23	23	23	23
Y	5K	16	18	18	21	21	22	26	30	35	35	38	40	44
1.5	10K	16	18	18	21	21	22	26	30	35	35	38	40	44