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Forged Flanges

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Standard Specication For Forged Flanges

Dimensions : ANSI B16.5, ANSI B16.47 Series A & B, MSS SP44, ASA, API-605, AWWA, Custom Drawings
Size : 1/2″ (15 NB) to 48″ (1200NB)
Class : 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS, DIN Standard ND-6,10, 16, 25, 40 Etc.
DIN : DIN2527, DIN2566, DIN2573, DIN2576, DIN2641, DIN2642, DIN2655, DIN2656, DIN2627, DIN2628, DIN2629,
DIN 2631, DIN2632, DIN2633, DIN2634, DIN2635, DIN2636,DIN2637, DIN2638, DIN2673
BS : BS4504 , BS4504, BS1560, BS10
Flange Face Type : Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ)

Material & Grades of Forged Flanges :

Stainless Steel Forged Flanges :
ASTM A 182, A 240 F 304, 304L, 304H, 316, 316L, 316Ti, 310, 310S, 321, 321H, 317, 347, 347H, 904L

Duplex & Super Duplex Steel Forged Flanges :
ASTM / ASME A/SA 182 F 44, F 45, F51, F 53, F 55, F 60, F 61

Carbon Steel Forged Flanges :
ASTM / ASME A/SA 105 ASTM / ASME A 350 , ASTM A 181 LF 2 / A516 Gr.70 A36, A694 F42, F46, F52, F60, F65, F706

Low Temperature Carbon Steel Forged Flanges : ASTM A350, LF2, LF3

Alloy Steel Forged Flanges :
ASTM / ASME A/SA 182 & A 387 F1, F5, F9, F11, F12, F22, F91

Copper Alloy Steel Forged Flanges : ASTM SB 61 , SB62 , SB151 , SB152 UNS No. C 70600 (Cu-Ni 90/10), C 71500
(Cu-Ni 70/30), UNS No. C 10100, 10200, 10300, 10800, 12000, 12200

Nickel Alloy Forged Flanges :
ASTM SB564, SB160, SB472, SB162 Nickel 200 (UNS No. N02200), Nickel 201 (UNS No. N02201), Monel 400 (UNS
No. N04400), Monel 500 (UNS No. N05500), Inconel 800 (UNS No. N08800), Inconel 825 (UNS No. N08825), Inconel
600 (UNS No. N06600), Inconel 625 (UNS No. N06625), Inconel 601 (UNS No. N06601), Hastelloy C 276 (UNS No.
N10276), Alloy 20 (UNS No. N08020)

ASME B16.5 Forged Flanges Available Types

Forged Flange	Forged Steel Flanges
ANSI B16.5 Forged Flanges	Forged Flange Dimensions
ASME B16.5 Forged Flanges	ANSI B16.5 Class 150 Forged Flanges
Stainless Steel Forged Flanges	Suppliers SS Forged Flange
Forged Plate Flanges Dealer	ASME B16.47 Series A and B Forged Flanges Exporter
ANSI B16.5 class 150 Forged Flange Stockholder	ANSI 150 Forged Flange Distributors
Carbon Steel Forged Flange	High Quality Forged Flanges Manufacturer
ASTM A182 Stainless Steel Forged Flange	Duplex Steel Forged Flange
Super Duplex Steel Forged Forged Flange	Copper Nickel Forged Pipe Flanges
High Nickel Alloy Forged Flanges	Hastelloy Flat Faced Forged Flanges Stockist
Titanium ASME B16.47 Series A and B Forged Flanges	Inconel Forged Flanges

Technical Parameters

ANSI/ASME B16.5 FORGED FLANGES DIMENSIONS

Class 150 Forged Flange Dimesions
Nom. Pipe Size	O	T	TJ	R	X	#/Dia of Holesa	Bolt Circle Dia	B	B2b	B3	H	L	L2	L3c	r	D	Thr
½	3.5	0.38	0.44	1.38	1.19	4-0.62	2.38	0.88	0.62	0.9	0.84	0.56	1.81	0.62	0.12	0.38	0.62
¾	3.88	0.44	0.5	1.69	1.5	4-0.62	2.75	1.09	0.82	1.11	1.05	0.56	2	0.62	0.12	0.44	0.62
1	4.25	0.5	0.56	2	1.94	4-0.62	3.12	1.36	1.05	1.38	1.32	0.62	2.12	0.69	0.12	0.5	0.69
1¼	4.62	0.56	0.62	2.5	2.31	4-0.62	3.5	1.7	1.38	1.72	1.66	0.75	2.19	0.81	0.19	0.56	0.81
1½	5	0.62	0.69	2.88	2.56	4-0.62	3.88	1.95	1.61	1.97	1.9	0.81	2.38	0.88	0.25	0.62	0.88
2	6	0.69	0.75	3.62	3.06	4-0.75	4.75	2.44	2.07	2.46	2.38	0.94	2.44	1	0.31	0.69	1
2½	7	0.81	0.88	4.12	3.56	4-0.75	5.5	2.94	2.47	2.97	2.88	1.06	2.69	1.12	0.31	0.75	1.12
3	7.5	0.88	0.94	5	4.25	4-0.75	6	3.57	3.07	3.6	3.5	1.12	2.69	1.19	0.38	0.81	1.19
3½	8.5	0.88	0.94	5.5	4.81	8-0.75	7	4.07	3.55	4.1	4	1.19	2.75	1.25	0.38	0.88	1.25
4	9	0.88	0.94	6.19	5.31	8-0.75	7.5	4.57	4.03	4.6	4.5	1.25	2.94	1.31	0.44	0.94	1.31
5	10	0.88	0.94	7.31	6.44	8-0.88	8.5	5.66	5.05	5.69	5.56	1.38	3.44	1.44	0.44	0.94	1.44
6	11	0.94	1	8.5	7.56	8-0.88	9.5	6.72	6.07	6.75	6.63	1.5	3.44	1.56	0.5	1.06	1.56
8	13.5	1.06	1.12	10.62	9.69	8-0.88	11.75	8.72	7.98	8.75	8.63	1.69	3.94	1.75	0.5	1.25	1.75
10	16	1.12	1.19	12.75	12	12-1.00	14.25	10.88	10.02	10.92	10.75	1.88	3.94	1.94	0.5	1.31	1.94
12	19	1.19	1.25	15	14.38	12-1.00	17	12.88	12	12.92	12.75	2.12	4.44	2.19	0.5	1.56	2.19
14	21	1.31	1.38	16.25	15.75	12-1.12	18.75	14.14	13.25	14.18	14	2.19	4.94	3.12	0.5	1.63	2.25
16	23.5	1.38	1.44	18.5	18	16-1.12	21.25	16.16	15.25	16.19	16	2.44	4.94	3.44	0.5	1.75	2.5
18	25	1.5	1.56	21	19.88	16-1.25	22.75	18.18	17.25	18.2	18	2.62	5.44	3.81	0.5	1.94	2.69
20	27.5	1.62	1.69	23	22	20-1.25	25	20.2	19.25	20.25	20	2.81	5.62	4.06	0.5	2.13	2.88
22	29.5	1.75	1.81	25.25	24.25	20-1.38	27.25	22.22	21.25	22.25	22	3.07	5.82	4.25	0.5	2.38	3.13
24	32	1.81	1.88	27.25	26.12	20-1.38	29.5	24.25	23.25	24.25	24	3.19	5.94	4.38	0.5	2.5	3.25

Class 300 Forged Flange Dimesions
Nom. Pipe Size	O	T	TJ	R	X	#/Dia of Holesa	Bolt Circle Dia	B	B2b	B3	H	L	L2	L3c	r	C	D	Thr
½	3.75	0.5	0.56	1.38	1.5	4-0.63	2.62	0.88	0.62	0.9	0.84	0.81	2	0.88	0.12	0.93	0.38	0.62
¾	4.62	0.56	0.62	1.69	1.88	4-0.75	3.25	1.09	0.82	1.11	1.05	0.94	2.19	1	0.12	1.14	0.44	0.62
1	4.88	0.62	0.69	2	2.12	4-0.75	3.5	1.36	1.05	1.38	1.32	1	2.38	1.06	0.12	1.41	0.5	0.69
1¼	5.25	0.69	0.75	2.5	2.5	4-0.75	3.88	1.7	1.38	1.72	1.66	1	2.5	1.06	0.19	1.75	0.56	0.81
1½	6.12	0.75	0.81	2.88	2.75	4-0.88	4.5	1.95	1.61	1.97	1.9	1.13	2.63	1.19	0.25	1.98	0.62	0.88
2	6.5	0.81	0.88	3.62	3.31	8-0.75	5	2.44	2.07	2.46	2.38	1.25	2.69	1.31	0.31	2.5	0.69	1.12
2½	7.5	0.94	1	4.12	3.94	8-0.88	5.88	2.94	2.47	2.97	2.88	1.44	2.94	1.5	0.31	3	0.75	1.25
3	8.25	1.06	1.12	5	4.62	8-0.88	6.62	3.57	3.07	3.6	3.5	1.63	3.06	1.69	0.38	3.63	0.81	1.25
3½	9	1.12	1.19	5.5	5.25	8-0.88	7.25	4.07	3.55	4.1	4	1.69	3.13	1.75	0.38	4.13	….	1.44
4	10	1.19	1.25	6.19	5.75	8-0.88	7.88	4.57	4.03	4.6	4.5	1.82	3.32	1.88	0.44	4.63	….	1.44
5	11	1.31	1.38	7.31	7	8-0.88	9.25	5.66	5.05	5.69	5.56	1.94	3.82	2	0.44	5.69	….	1.69
6	12.5	1.38	1.44	8.5	8.12	12-0.88	10.62	6.72	6.07	6.75	6.63	2	3.82	2.06	0.5	6.75	….	1.81
8	15	1.56	1.62	10.62	10.25	12-1.00	13	8.72	7.98	8.75	8.63	2.38	4.32	2.44	0.5	8.75	….	2
10	17.5	1.81	1.88	12.75	12.62	16-1.12	15.25	10.88	10.02	10.92	10.75	2.56	4.56	3.75	0.5	10.88	….	2.19
12	20.5	1.94	2	15	14.75	16-1.25	17.75	12.88	12	12.92	12.75	2.82	5.06	4	0.5	12.94	….	2.38
14	23	2.06	2.12	16.25	16.75	20-1.25	20.25	14.14	13.25	14.18	14	2.94	5.56	4.38	0.5	14.19	….	2.5
16	25.5	2.19	2.25	18.5	19	20-1.38	22.5	16.16	15.25	16.19	16	3.19	5.69	4.75	0.5	16.19	….	2.69
18	28	2.31	2.38	21	21	24-1.38	24.75	18.18	17.25	18.2	18	3.44	6.19	5.12	0.5	18.19	….	2.75
20	30.5	2.44	2.5	23	23.12	24-1.38	27	20.2	19.25	20.25	20	3.69	6.32	5.5	0.5	20.19	….	2.88
22	33	2.57	2.63	25.25	25.25	24-1.63	29.25	22.22	21.25	22.25	22	3.93	6.43	5.75	0.5	22.19	….	3.13
24	36	2.69	2.75	27.25	27.62	24-1.63	32	24.25	23.25	24.25	24	4.13	6.56	6	0.5	24.19	….	3.25

Dimensions are in inches.

(a)- Bolt hole diameter 1/8 in. larger than bolt diameter.
(b)- Standard bore dimensions provided. See bore chart for other wall thicknesses.
(c)- This dimension is commonly associated with “true” lap joints. Industry standard is to make to the slip on length through the hub.

Class 400 Forged Flange Dimesions

Nom. Pipe Size

#/Dia of Holesa

Bolt Circle Dia

B2b

L3c

Thr

3.75

0.56

1.38

1.5

4-0.63

2.62

0.88

To Be Specified By Purchaser	0.9	0.84	0.88	2.06	0.88	0.12	0.93	0.38	0.62
	¾	4.62	0.62	1.69	1.88	4-0.75	3.25	1.09	1.11	1.05	1	2.25	1	0.12	1.14	0.44	0.62
	1	4.88	0.69	2	2.12	4-.075	3.5	1.36	1.38	1.32	1.06	2.44	1.06	0.12	1.41	0.5	0.69
	1¼	5.25	0.81	2.5	2.5	4-0.75	3.88	1.7	1.72	1.66	1.12	2.62	1.12	0.19	1.75	0.56	0.81
	1½	6.12	0.88	2.88	2.75	4-0.88	4.5	1.95	1.97	1.9	1.25	2.75	1.25	0.25	1.99	0.62	0.88
	2	6.5	1	3.62	3.31	8-0.75	5	2.44	2.46	2.38	1.44	2.88	1.44	0.31	2.5	0.69	1.12
	2½	7.5	1.12	4.12	3.94	8-0.88	5.88	2.94	2.97	2.88	1.62	3.12	1.62	0.31	3	0.75	1.25
	3	8.25	1.25	5	4.62	8-0.88	6.62	3.57	3.6	3.5	1.81	3.25	1.81	0.38	3.63	0.81	1.38
	3½	9	1.38	5.5	5.25	8-1.00	7.25	4.07	4.1	4	1.94	3.38	1.94	0.38	4.13	….	1.56
	4	10	1.38	6.19	5.75	8-1.00	7.88	4.57	4.6	4.5	2	3.5	2	0.44	4.63	….	1.44
	5	11	1.5	7.31	7	8-1.00	9.25	5.66	5.69	5.56	2.12	4	2.12	0.44	5.69	….	1.69
	6	12.5	1.62	8.5	8.12	12-1.00	10.62	6.72	6.75	6.63	2.25	4.06	2.25	0.5	6.75	….	1.81
	8	15	1.88	10.62	10.25	12-1.12	13	8.72	8.75	8.63	2.69	4.62	2.69	0.5	8.75	….	2
	10	17.5	2.12	12.75	12.62	16-1.25	15.25	10.88	10.92	10.75	2.88	4.88	4	0.5	10.88	….	2.19
	12	20.5	2.25	15	14.75	16-1.38	17.75	12.88	12.92	12.75	3.12	5.38	4.25	0.5	12.94	….	2.38
	14	23	2.38	16.25	16.75	20-1.38	20.25	14.14	14.18	14	3.31	5.88	4.62	0.5	14.19	….	2.5
	16	25.5	2.5	18.5	19	20-1.50	22.5	16.16	16.19	16	3.69	6	5	0.5	16.19	….	2.69
	18	28	2.62	21	21	24-1.50	24.75	18.18	18.2	18	3.88	6.5	5.38	0.5	18.19	….	2.75
	20	30.5	2.75	23	23.12	24-1.62	27	20.2	20.25	20	4	6.62	5.75	0.5	20.19	….	2.88
	22	33	2.88	25.25	25.25	24-1.75	29.25	22.22	22.25	22	4.25	6.75	6	0.5	….	….	—
	24	36	3	27.25	27.62	24-1.88	32	24.25	24.25	24	4.5	6.88	6.25	0.5	24.19	….	3.25

Dimensions are in inches.

Class 600 Forged Steel Flange Dimensions
Nom. Pipe Size	O	T	R	X	#/Dia of Holes	Bolt Circle Dia	B	B2b	B3	H	L	L2	L3c	r	C	D	Thr
½	3.75	0.56	1.38	1.5	4-0.63	2.62	0.88	To Be Specified By Purchaser	0.9	0.84	0.88	2.06	0.88	0.12	0.93	0.38	0.62
¾	4.62	0.62	1.69	1.88	4-0.75	3.25	1.09		1.11	1.05	1	2.25	1	0.12	1.14	0.44	0.62
1	4.88	0.69	2	2.12	4-0.75	3.5	1.36		1.38	1.32	1.06	2.44	1.06	0.12	1.41	0.5	0.69
1¼	5.25	0.81	2.5	2.5	4-0.75	3.88	1.7		1.72	1.66	1.12	2.62	1.12	0.19	1.75	0.56	0.81
1½	6.12	0.88	2.88	2.75	4-0.88	4.5	1.95		1.97	1.9	1.25	2.75	1.25	0.25	1.99	0.62	0.88
2	6.5	1	3.62	3.31	8-0.75	5	2.44		2.46	2.38	1.44	2.88	1.44	0.31	2.5	0.69	1.12
2½	7.5	1.12	4.12	3.94	8-0.88	5.88	2.94		2.97	2.88	1.62	3.12	1.62	0.31	3	0.75	1.25
3	8.25	1.25	5	4.62	8-0.88	6.62	3.57		3.6	3.5	1.81	3.25	1.81	0.38	3.63	0.81	1.38
3½	9	1.38	5.5	5.25	8-1.00	7.25	4.07		4.1	4	1.94	3.38	1.94	0.38	4.13	….	1.56
4	10.75	1.5	6.19	6	8-1.00	8.5	4.57		4.6	4.5	2.12	4	2.12	0.44	4.63	….	1.62
5	13	1.75	7.31	7.44	8-1.12	10.5	5.66		5.69	5.56	2.38	4.5	2.38	0.44	5.69	….	1.88
6	14	1.88	8.5	8.75	12-1.12	11.5	6.72		6.75	6.63	2.62	4.62	2.62	0.5	6.75	….	2
8	16.5	2.19	10.62	10.75	12-1.25	13.75	8.72		8.75	8.63	3	5.25	3	0.5	8.75	….	2.25
10	20	2.5	12.75	13.5	16-1.38	17	10.88		10.92	10.75	3.38	6	4.38	0.5	10.88	….	2.56
12	22	2.62	15	15.75	20-1.38	19.25	12.88		12.92	12.75	3.62	6.12	4.62	0.5	12.94	….	2.75
14	23.75	2.75	16.25	17	20-1.50	20.75	14.14		14.18	14	3.69	6.5	5	0.5	14.19	….	2.88
16	27	3	18.5	19.5	20-1.63	23.75	16.16		16.19	16	4.19	7	5.5	0.5	16.19	….	3.06
18	29.25	3.25	21	21.5	20-1.75	25.75	18.18		18.2	18	4.62	7.25	6	0.5	18.19	….	3.12
20	32	3.5	23	24	24-1.75	28.5	20.2		20.25	20	5	7.5	6.5	0.5	20.19	….	3.25
22	34.25	3.75	25.25	26.25	24-1.75	30.63	22.22		22.25	22	5.25	7.75	6.88	0.5	….	….	—
24	37	4	27.25	28.25	24-2.00	33	24.25		24.25	24	5.5	8	7.25	0.5	24.19	….	3.62

Dimensions are in inches.

Class 900 Forged Flange Dimesions

Nom. Pipe Size

#/Dia of Holesa

Bolt Circle Dia

B2b

L3c

Thr

Sizes 1/2″ through 2 1/2″ are identical to class 1500.

9.5

1.5

8-1.00

7.5

3.57

To Be Specified By Purchaser	3.6	3.5	2.12	4	2.12	0.38	3.63	1.62
	4	11.5	1.75	6.19	6.25	8-1.25	9.25	4.57	4.6	4.5	2.75	4.5	2.75	0.44	4.63	1.88
	5	13.75	2	7.31	7.5	8-1.38	11	5.66	5.69	5.56	3.12	5	3.12	0.44	5.69	2.12
	6	15	2.19	8.5	9.25	12-1.25	12.5	6.72	6.75	6.63	3.38	5.5	3.38	0.5	6.75	2.25
	8	18.5	2.5	10.63	11.75	12-1.50	15.5	8.72	8.75	8.63	4	6.38	4.5	0.5	8.75	2.5
	10	21.5	2.75	12.75	14.5	16-1.50	18.5	10.88	10.92	10.75	4.25	7.25	5	0.5	10.88	2.81
	12	24	3.12	15	16.5	20-1.50	21	12.88	12.92	12.75	4.63	7.88	5.62	0.5	12.94	3
	14	25.25	3.38	16.25	17.75	20-1.63	22	14.14	14.18	14	5.12	8.38	6.12	0.5	14.19	3.25
	16	27.75	3.5	18.5	20	20-1.75	24.25	16.16	16.19	16	5.25	8.5	6.5	0.5	16.19	3.38
	18	31	4	21	22.25	20-2.00	27	18.18	18.2	18	6	9	7.5	0.5	18.19	3.5
	20	33.75	4.25	23	24.5	20-2.13	29.5	20.2	20.25	20	6.25	9.75	8.25	0.5	20.19	3.62
	24	41	5.5	27.25	29.5	20-2.63	35.5	24.25	24.25	24	8	11.5	10.5	0.5	24.19	4

Class 1500 Forged Flange Dimensions
Nom. Pipe Size	O	T	R	X	#/Dia of Holesa	Bolt Circle Dia	B	B2b	B3	H	L	L2	L3c	r	C	D	Thr
½	4.75	0.88	1.38	1.5	4-0.88	3.25	0.88	To Be Specified By Purchaser	0.9	0.84	1.25	2.38	1.25	0.12	0.93	0.38	0.88
¾	5.12	1	1.69	1.75	4-0.88	3.5	1.09		1.11	1.05	1.38	2.75	1.38	0.12	1.14	0.44	1
1	5.88	1.12	2	2.06	4-1.00	4	1.36		1.38	1.32	1.62	2.88	1.62	0.12	1.41	0.5	1.12
1¼	6.25	1.12	2.5	2.5	4-1.00	4.38	1.7		1.72	1.66	1.62	2.88	1.62	0.19	1.75	0.56	1.19
1½	7	1.25	2.88	2.75	4-1.12	4.88	1.95		1.97	1.9	1.75	3.25	1.75	0.25	1.99	0.62	1.25
2	8.5	1.5	3.63	4.12	8-1.00	6.5	2.44		2.46	2.38	2.25	4	2.25	0.31	2.5	0.69	1.5
2½	9.62	1.62	4.13	4.88	8-1.12	7.5	2.94		2.97	2.88	2.5	4.12	2.5	0.31	3	0.75	1.88
3	10.5	1.88	5	5.25	8-1.25	8	….		3.6	3.5	….	4.62	2.88	0.38	….	….	….
4	12.25	2.12	6.19	6.38	8-1.38	9.5	….		4.6	4.5	….	4.88	3.56	0.44	….	….	….
5	14.75	2.88	7.31	7.75	8-1.63	11.5	….		5.69	5.56	….	6.12	4.12	0.44	….	….	….
6	15.5	3.25	8.5	9	12-1.50	12.5	….		6.75	6.63	….	6.75	4.69	0.5	….	….	….
8	19	3.62	10.63	11.5	12-1.75	15.5	….		8.75	8.63	….	8.38	5.62	0.5	….	….	….
10	23	4.25	12.75	14.5	12-2.00	19	….		10.92	10.75	….	10	7	0.5	….	….	….
12	26.5	4.88	15	17.75	16-2.12	22.5	….		12.92	12.75	….	11.12	8.62	0.5	….	….	….
14	29.5	5.25	16.25	19.5	16-2.38	25	….		14.18	14	….	11.75	9.5	0.5	….	….	….
16	32.5	5.75	18.5	21.75	16-2.63	27.75	….		16.19	16	….	12.25	10.25	0.5	….	….	….
18	36	6.38	21	23.5	16-2.88	30.5	….		18.2	18	….	12.88	10.88	0.5	….	….	….
20	38.75	7	23	25.25	16-3.12	32.75	….		20.25	20	….	14	11.5	0.5	….	….	….
24	46	8	27.25	30	16-3.63	39	….		24.25	24	….	16	13	0.5	….	….	….

Dimensions are in inches.

Cangzhou Bao Lai Da

Forged Flanges

Standard Specication For Forged Flanges

ASME B16.5 Forged Flanges Available Types

Technical Parameters

Class 900 Forged Flange Dimesions

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