AWWA C207 Class D Blind Flange

July 8, 2020

Technical Drawing

The drawing of AWWA C207 Class D blind flange, with flat face (FF), available from 4″ through 72″.

The working pressure limit at water service temperature for AWWA C207 Class D blind flange is 175 psi [1207 kPa] for NPS ≤ 12″ and 150 psi [1034 kPa] for NPS ＞ 12″. The maximum pressure (test or transient) for the Class D blind flange up to 12″ is 260 psi; The maximum pressure (test or transient) for the Class D blind flange larger than 12″ is 225 psi.

Dimensions & Masses

NPS	A	T	Mass
4"	9.00	0.625	4.83
5"	10.00	0.650	6.16
6"	11.00	0.693	8.04
8"	13.50	0.812	14.45
10"	16.00	0.953	23.49
12"	19.00	1.117	39.39
14"	21.00	1.133	48.74
16"	23.50	1.265	67.99
18"	25.00	1.331	80.68
20"	27.50	1.448	106.06
22"	29.50	1.568	131.87
24"	32.00	1.661	165.50
26"	34.25	1.786	203.48
28"	36.50	1.906	246.35
30"	38.75	2.008	293.89
32"	41.75	2.150	362.57
34"	43.75	2.252	416.27
36"	46.00	2.370	486.44
38"	48.75	2.506	580.32
40"	50.75	2.609	653.84
42"	53.00	2.729	748.28
44"	55.25	2.849	848.25
46"	57.25	2.952	946.02
48"	59.50	3.072	1062.73
50"	61.75	3.196	1181.29
52"	64.00	3.315	1320.03
54"	66.25	3.435	1469.52
60"	73.00	3.779	1964.82
66"	80.00	4.136	2597.98
72"	86.50	4.480	3291.18

*A: outside diameter of flange, inch; T: minimum thickness of flange, inch; Mass: weight of flange, kg.
*For AWWA C207 Class D blind, the minimum thickness is based on allowable stress of 16000 psi and allowable bolt stress of 7000 psi.

NPS	n	C	d
4"	8	7.50	0.625
5"	8	8.50	0.750
6"	8	9.50	0.750
8"	8	11.75	0.750
10"	12	14.25	0.875
12"	12	17.00	0.875
14"	12	18.75	1.000
16"	16	21.25	1.000
18"	16	22.75	1.125
20"	20	25.00	1.125
22"	20	27.25	1.250
24"	20	29.50	1.250
26"	24	31.75	1.250
28"	28	34.00	1.250
30"	28	36.00	1.250
32"	28	38.50	1.500
34"	32	40.50	1.500
36"	32	42.75	1.500
38"	32	45.25	1.500
40"	36	47.25	1.500
42"	36	49.50	1.500
44"	40	51.75	1.500
46"	40	53.75	1.500
48"	44	56.00	1.500
50"	44	58.25	1.750
52"	44	60.50	1.750
54"	44	62.75	1.750
60"	52	69.25	1.750
66"	52	76.00	1.750
72"	60	82.50	1.750

*n: number of bolts; C: diameter of bolt circle, inch; d: diameter of bolts.

AWWA C207 Pipe Flange Dimensions & Masses
Ring Flange	Class B \| Class D Class E \| Class F
Blind Flange	Class B \| Class D Class E \| Class F
Hub Flange	Class D \| Class E

*Click to view more information about AWWA C207 steel flanges.

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