Dimensions Orifice Weld Neck RTJ flanges ASME B16.36 Class 1500

NPS	Out Side DIA	Min thk Flg	Hgt Flg	Grv NO	Pitch DIA	Grv Depth
	O	T	H		P	E
1	150	38.1	83	R16	50.80	6.35
1.1/2	180	38.1	89	R20	68.27	6.35
2	215	38.1	102	R24	95.25	7.92
2.1/2	245	41.3	105	R27	107.95	7.92
3	265	47.7	117	R35	136.53	7.92
4	310	54.0	124	R39	161.93	7.92
6	395	82.6	171	R46	211.14	9.52
8	485	92.1	213	R50	269.88	11.13
10	585	108.0	254	R54	323.85	11.13
12	675	123.9	283	R58	381.00	14.27
14	750	133.4	298	R63	419.10	15.88
16	825	146.1	311	R67	469.90	17.48
18	915	162.0	327	R71	533.40	17.48
20	985	177.8	356	R75	584.20	17.48
24	1170	203.2	406	R79	692.15	20.62

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	52	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	105	60.3	6.4
2.1/2	11.91	0.8	27.0	124	73.0	6.4
3	11.91	0.8	27.0	133	88.9	9.5
4	11.91	0.8	27.0	162	114.3	12.7
6	13.49	1.5	28.6	229	168.3	12.7
8	16.66	1.5	33.3	292	219.1	12.7
10	16.66	1.5	33.3	368	273.0	12.7
12	23.01	1.5	39.7	451	323.8	12.7
14	26.97	2.4	44.4	495	355.6	12.7
16	30.18	2.4	50.8	552	406.4	12.7
18	30.18	2.4	50.8	597	457.2	12.7
20	33.32	2.4	54.0	641	508.0	12.7
24	36.53	2.4	58.7	762	609.6	12.7

NPS	Bolt Circle	NO of Bolts	DIA of Holes	DIA Stud Bolts	Stud Bolt L
1	101.6	4	1	7/8	160
1.1/2	123.8	4	1.1/8	1	165
2	165.1	8	1	7/8	165
2.1/2	190.5	8	1.1/8	1	180
3	203.2	8	1.1/4	1.1/8	185
4	241.3	8	1.3/8	1.1/4	215
6	317.5	12	1.1/2	1.3/8	280
8	393.7	12	1.3/4	1.5/8	310
10	482.6	12	2	1.7/8	355
12	571.6	16	2.1/8	2	400
14	635.0	16	2 3/8	2.1/4	445
16	704.8	16	2 5/8	2.1/2	485
18	774.7	16	2 7/8	2.3/4	535
20	831.8	16	3.1/8	3	570
24	990.6	16	3.5/8	3.1/2	660

General Notes..

• Dimensions are in millimeters, except for bolts and bolt holes.
• All other dimensions are in accordance with ASME B16.5.
• Ring joint flanges larger than NPS 6 will require angular meter taps.

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 6.
• 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