ASTM B16.47 Large Diameter Flange Dimensions

ASME B16.47 specifies the dimensions, tolerances, materials, marking, and pressure ratings for large-diameter pipe flanges in sizes NPS 26 (DN 650) through NPS 60 (DN 1500). This standard covers flanges with pressure classes 75, 150, 300, 400, 600, and 900.

ASME B16.47 standard is limited to weld neck flanges and blind flanges.

ASME/ANSI B16.5 provides:

Weld neck flange

Blind flange

MARKING

Name: Manufacturer’s name or trademark

Material: Cast or Forged, material standard ASTM xxx.

Pressure Ratings: (i.e., Class 75, 150, 300, 400, 600, or 900).

Conformance: ASME B16 or B16.47 standard.

Temperature: If a temperature is noted, indicate the corresponding pressure rating.

Size: NPS

Ring Joint Flanges: Shall be marked with letter R and ring groove number.

Multiple Material Marking: In case multiple material used.

ASME B16.47 Series A and Series B Pressure Rating

ASME B16.47 Series A Flanges, by Class
150	300	400	600	900	-
ASME B16.47 Series B Flanges, by Class
75	150	300	400	600	900

MATERIALS

ASTM A105	ASTM A350	ASTM A182	ASTM A216	ASTM A352	ASTM A217	ASTM A351	ASTM A240
ASTM A515	ASTM A537	ASTM A203	ASTM A515	ASTM A203	ASTM A204	ASTM A387	/

Plate material can only be used for blind flanges

ASTM B16.47 Large Diameter Flange Dimensions

Table 1    Dimensions of Ring-Joint Facings

Nominal Pipe Size for Class				Groove Number	Groove Dimensions			Radius at Bottom, R	Diameter of Raised Portion, K
					Pitch Diameter, P	Depth, E	Width, F
300	400	600	900
26	26	26	. . .	R93	749.30	12.70	19.84	1.5	810
28	28	28	. . .	R94	800.10	12.70	19.84	1.5	861
30	30	30	. . .	R95	857.25	12.70	19.84	1.5	917
32	32	32	. . .	R96	914.40	14.27	23.01	1.5	984
34	34	34	. . .	R97	965.20	14.27	23.01	1.5	1 035
36	36	36	. . .	R98	1 022.35	14.27	23.01	1.5	1 092
. . .	. . .	. . .	26	R100	749.30	17.48	30.18	2.3	832
. . .	. . .	. . .	28	R101	800.10	17.48	33.32	2.3	889
. . .	. . .	. . .	30	R102	857.25	17.48	33.32	2.3	946
. . .	. . .	. . .	32	R103	914.40	17.48	33.32	2.3	1 003
. . .	. . .	. . .	34	R104	965.20	20.62	36.53	2.3	1 067
. . .	. . .	. . .	36	R105	1 022.35	20.62	36.53	2.3	1 124

NOTE:

(1) Height of raised portion is equal to the depth of groove dimension E, but is not subjected to the tolerances for E. Full face contour may be used.

Table 2    Dimensions of Class 150 Series A Flanges

NOTES:

(1)  The minimum flange thickness does not include the raised face thickness.

(2)  This dimension is for the large end of hub, which may be straight or tapered.

(3)  For welding and bevel.

Table 3    Dimensions of Class 300 Series A Flanges

NOTES:

(1)  The minimum flange thickness does not include the raised face thickness.

(2)  This dimension is for the large end of hub, which may be straight or tapered.

(3)  For welding and bevel.

Table 4    Dimensions of Class 400 Series A Flanges

NOTES:

(1)  The minimum flange thickness does not include the raised face thickness.

(2)  This dimension is for the large end of hub, which may be straight or tapered.

(3)  For welding and bevel.

Table 6    Dimensions of Class 900 Series A Flanges

NOTES:

(1)  The minimum flange thickness does not include the raised face thickness.

(2)  This dimension is for the large end of hub, which may be straight or tapered.

(3)  For welding and bevel.

Table 7   Dimensions of Class 75 Series B Flanges

NOTES:

(1)  The minimum flange thickness does not include the raised face thickness.

(2)  This dimension is for the large end of hub, which may be straight or tapered.

(3)  For welding and bevel.

Table 8    Dimensions of Class 150 Series B Flanges

NOTES:

(1)  The minimum flange thickness does not include the raised face thickness.

(2)  This dimension is for the large end of hub, which may be straight or tapered.

Table 9  Dimensions of Class 300 Series B Flanges

NOTES:

(1)  The minimum flange thickness does not include the raised face thickness.

(2)  This dimension is for the large end of hub, which may be straight or tapered.

(3)  For welding and bevel.

Table 10    Dimensions of Class 400 Series B Flanges

NOTES:

(1)  The minimum flange thickness does not include the raised face thickness.

(2)  This dimension is for the large end of hub, which may be straight or tapered.

Table 11    Dimensions of Class 600 Series B Flanges

NOTES:

(1)  The minimum flange thickness does not include the raised face thickness.

(2)  This dimension is for the large end of hub, which may be straight or tapered.

Table 12    Dimensions of Class 900 Series B Flanges

NOTES:

(1)  The minimum flange thickness does not include the raised face thickness.

(2)  This dimension is for the large end of hub, which may be straight or tapered.