Dimensions Orifice Weld Neck RTJ flanges ASME B16.36 Class 600

NPS	Out Side DIA	Min thk Flg	Hgt Flg	Grv NO	Pitch DIA	Grv Depth
	O	T	H		P	E
1	125	36.6	81	R16	50.80	6.35
1.1/2	155	36.6	84	R20	68.27	6.35
2	165	36.6	84	R23	82.55	7.92
2.1/2	190	36.6	87	R26	101.60	7.92
3	210	36.6	87	R31	123.83	7.92
4	275	38.1	102	R37	149.23	7.92
6	355	47.7	117	R45	211.12	7.92
8	420	55.6	133	R49	269.88	7.92
10	510	63.5	152	R53	323.85	7.92
12	560	66.7	156	R57	381.00	7.92
14	605	69.9	165	R61	419.10	7.92
16	685	76.2	178	R65	469.90	7.92
18	745	82.6	184	R69	533.40	7.92
20	815	88.9	190	R73	584.20	9.53
24	940	101.6	203	R77	692.15	11.13

NPS	Grv Width	R Btm	Hgt Oval Ring	Hub DIA	Hub DIA	DIA of Tap
	F	R	W	X	A	Tg
1	8.74	0.8	25.4	54	33.5	6.4
1.1/2	8.74	0.8	25.4	70	48.3	6.4
2	11.91	0.8	27.0	84	60.3	6.4
2.1/2	11.91	0.8	27.0	100	73.0	6.4
3	11.91	0.8	27.0	117	88.9	9.5
4	11.91	0.8	27.0	152	114.3	12.7
6	11.91	0.8	27.0	222	168.3	12.7
8	11.91	0.8	27.0	273	219.1	12.7
10	11.91	0.8	27.0	343	273.0	12.7
12	11.91	0.8	27.0	400	323.8	12.7
14	11.91	0.8	27.0	432	355.6	12.7
16	11.91	0.8	30.2	495	406.4	12.7
18	11.91	0.8	30.2	546	457.2	12.7
20	13.49	1.5	31.8	610	508.0	12.7
24	16.66	1.5	36.5	718	609.6	12.7

NPS	Bolt Circle	NO of Bolts	DIA of Holes	DIA Stud Bolts	Stud Bolt L
1	88.9	4	3/4	5/8	140
1.1/2	114.3	4	7/8	3/4	140
2	127.0	8	3/4	5/8	140
2.1/2	149.2	8	7/8	3/4	145
3	168.3	8	7/8	3/4	145
4	215.9	8	1	7/8	165
6	292.1	12	1.1/8	1	190
8	349.2	12	1.1/4	1.1/8	210
10	431.8	16	1.3/8	1.1/4	235
12	489.0	20	1.3/8	1.1/4	240
14	527.0	20	1.1/2	1.3/8	255
16	603.2	20	1.5/8	1.1/2	275
18	654.0	20	1.3/4	1.5/8	290
20	723.9	24	1.3/4	1.5/8	320
24	838.2	24	2	1.7/8	350

General Notes..

• Dimensions are in millimeters, except for bolts and bolt holes.
• Weld neck flanges NPS 3 and smaller are identical to Class 300 flanges except
  for bolting and may be used for such service.
• All other dimensions are in accordance with ASME B16.5.
• Ring joint flange in NPS 24 will require an angular meter tap.

Notes..

• Other NPT sizes may be furnished if required.
• Bolt lengths for raised face flanges include allowance for orifice and gasket thickness
  of 6 mm (0.25 in.) for NPS 1 to NPS 12 and 10 mm (0.38 in.) for NPS 14 to NPS 24.
  Bolt lengths for ring-type joint flanges include allowance of 15 mm (0.62 in.) for NPS 1 to NPS 10,
  19 mm (0.75 in.) for NPS 12 to NPS 18, and 22 mm (0.88 in.) for NPS 20.
• Bore (B) is to be specified by the purchaser.
• The length of the Stud Bolt does not include the height of the chamfers (points).

Tolerances
Tolerances on all dimensions shall be as shown in ASME B16.5 except for those shown below.

Pressure Tap Location
Tolerance on location of center of pressure tap hole from flange face shall be..

• ±0.5 mm (±0.02 in.) for flanges smaller than NPS 4
• ±0.8 mm (±0.03 in.) for flanges NPS 4 and larger

Bore Diameter

• Bore diameter tolerance (Welding Neck flanges only) is ±0.5% of nominal value.

Studs are measured parallel to the axis (L) from the first to the thread without the chamfers (points). S = free threads equals 1/3 time bolt dia

 

Hex bolts are measured from under the head to the top of de bolt