Forged Slip On, Blind, Weld Neck Flange Manufacturer

Steel Forging Flange Manufacturers | ASME/ANSI B16.5, B16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092

A Forged Flange is a component used to connect pipes, valves, pumps, or equipment within a piping system, ensuring a secure and leak-proof connection. Made through the forging process, these flanges offer enhanced strength, durability, and resistance to high pressure and temperature. Commonly produced in materials like carbon steel, stainless steel, and alloy steel, forged flanges are widely used in industries such as oil and gas, petrochemicals, and power generation. Their precision and reliability make them ideal for critical applications.

Ample Alloys is a leading manufacturer and supplier of premium-quality forged flanges, trusted by industries worldwide. With decades of expertise, we specialize in producing flanges that meet the highest standards of strength, durability, and precision. Our advanced manufacturing facilities and skilled team enable us to deliver forged flanges in a variety of materials, including carbon steel, stainless steel, alloy steel, and exotic alloys, catering to diverse industrial needs. Committed to quality, every forged flange from us undergoes rigorous testing to ensure compliance with global standards like ASME, ANSI, API, and EN. With customizable designs and competitive pricing.

High-pressure forged flanges, Stainless steel, Carbon steel, Alloy steel forged flanges, Custom forged flange, Forged pipe flange, Forged slip-on flange, Forged blind flange, Forged weld neck flange, Precision forged flange

Forged pipe flange

Size Range

15mm ( 1/2" NPS ) up to 600mm ( 24" NPS ), For 2500# in sizes from NPS 1/2 to NPS 12

Flange Face Type

FF—Flat Face, RF—Raised Face, FM—Female Face, M—Male Face, T—Tongue Face, G—Groove Face, RJ—Ring Joint.

Stainless Steel

ASTM A182 F 304, 304L, 304H, 316, 316L, 316H, 317, 317L, 321, 321H, 310, 310S, 347, 904L, etc.

Standards / Dimension

ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN

Carbon Steel

ASTM A105/A105N (SA105N), LTCS A350 LF2, A694

Alloy Steel

ASTM A182 / SA182 - F1 / F5 / F9 / F11 / F12 / F22 / F91

Pressure Class

150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64.

Duplex & Super Duplex

ASTM A182 / ASME SA182 - S31803, S32205, 2205, S32750, S32760, S32950, 2507.

MTC

EN 10204 3.2 and EN 10204 3.1, Test Certificates certifying NACE MR0175, NACE MR0103

ASME/ANSI B16.5, B16.47 Forged Flange Dimensions

ASME B16.5 Forged Flange (Class 150) - Dimensions & Weight

NPS	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

ASME B16.5 Forged Flange (Class 300) - Dimensions & Weight

NPS	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

ASME B16.5 Forged Flange (Class 400) - Dimensions & Weight

NPS	O	T	R	X	#/Dia of Holesa	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-.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

ASME B16.5 Forged Flange (Class 600) - Dimensions & Weight

NPS	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

ASME B16.5 Forged Flange (Class 900) - Dimensions & Weight

NPS	O	T	R	X	#/Dia of Holesa	Bolt Circle Dia	B	B2b	B3	H	L	L2	L3c	r	C	Thr
Sizes 1/2″ through 2 1/2″ are identical to class 1500.
3	9.5	1.5	5	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

ASME B16.5 Forged Flange (Class 1500) - Dimensions & Weight

NPS	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	….	….	….

ASME B16.5 Forged Flange (Class 2500) - Dimensions & Weight

NPS	O	T	R	X	#/Dia of Holesa	Bolt Circle Dia	B2b	B3	H	L	L2	L3	r	C	Thr
½	5.25	1.19	1.38	1.69	4-0.88	3.5	To Be Specified By Purchaser	0.9	0.84	1.56	2.88	1.56	0.12	0.93	1.12
¾	5.5	1.25	1.69	2	4-0.88	3.75		1.11	1.05	1.69	3.12	1.69	0.12	1.14	1.25
1	6.25	1.38	2	2.25	4-1.00	4.25		1.38	1.32	1.88	3.5	1.88	0.12	1.41	1.38
1¼	7.25	1.5	2.5	2.88	4-1.12	5.13		1.72	1.66	2.06	3.75	2.06	0.19	1.75	1.5
1½	8	1.75	2.88	3.12	4-1.25	5.75		1.97	1.9	2.38	4.38	2.38	0.25	1.99	1.75
2	9.25	2	3.63	3.75	8-1.12	6.75		2.46	2.38	2.75	5	2.75	0.31	2.5	2
2½	10.5	2.25	4.13	4.5	8-1.25	7.75		2.97	2.88	3.12	5.62	3.12	0.31	3	2.25
3	12	2.62	5	5.25	8-1.38	9		3.6	3.5	….	6.62	3.62	0.38	….	….
4	14	3	6.19	6.5	8-1.63	10.75		4.6	4.5	….	7.5	4.25	0.44	….	….
5	16.5	3.62	7.31	8	8-1.88	12.75		5.69	5.56	….	9	5.12	0.44	….	….
6	19	4.25	8.5	9.25	8-2.12	14.5		6.75	6.63	….	10.75	6	0.5	….	….
8	21.75	5	10.63	12	12-2.12	17.25		8.75	8.63	….	12.5	7	0.5	….	….
10	26.5	6.5	12.75	14.75	12-2.63	21.25		10.92	10.75	….	16.5	9	0.5	….	….
12	30	7.25	15	17.38	12-2.88	24.38		12.92	12.75	….	18.25	10	0.5	….	….

High-pressure forged flange Standards

High-pressure forged flanges are designed to handle extreme pressure and temperature conditions. They are manufactured following stringent international standards to ensure safety, reliability, and compatibility. Common standards include:

ASME/ANSI Standards (American):
- ASME B16.5 – Pipe Flanges and Flanged Fittings (NPS 1/2" to 24").
- ASME B16.47 – Large Diameter Steel Flanges (Series A & B, NPS 26" to 60").
- ASME B16.36 – Orifice Flanges.
- ASME B16.48 – Line Blanks (Spectacle, Spade, and Spacer Flanges).
- ANSI B16.1 – Cast Iron Flanges and Flanged Fittings.
- ANSI B16.42 – Ductile Iron Pipe Flanges and Flanged Fittings.
ISO Standards (International)
- ISO 7005-1 – Steel Flanges for General Applications.
- ISO 7005-2 – Cast Iron Flanges.
- ISO 7005-3 – Copper Alloy Flanges.
EN Standards (European)
- EN 1092-1 – Steel Flanges.
- EN 1092-2 – Cast Iron Flanges.
- EN 1092-3 – Copper Alloy Flanges.
- EN 1092-4 – Aluminium Alloy Flanges.
DIN Standards (German)
- DIN 2527 – Blind Flanges.
- DIN 2576 – Slip-On Flanges (PN 10).
- DIN 2633 – Weld Neck Flanges (PN 16).
- DIN 2634 – Weld Neck Flanges (PN 25).
- DIN 2635 – Weld Neck Flanges (PN 40).
JIS Standards (Japanese)
- JIS B2220 – Steel Pipe Flanges.
GOST Standards (Russian)
- GOST 12820 – Flat Flanges for Steel Pipe Joints.
- GOST 12821 – Steel Welded Flanges for High-Pressure Applications.
- GOST 33259 – Flange Connections for Industrial Equipment and Pipelines.
BS Standards (British)
- BS 4504 – Circular Flanges for Pipes, Valves, and Fittings.
- BS 10 – Specification for Flanges and Bolting.
API Standards (Oil & Gas)
- API 6A – Wellhead and Christmas Tree Equipment Flanges.
- API 605 – Large-Diameter Carbon Steel Flanges (merged into ASME B16.47 Series B).
AWWA Standards (Waterworks)
- AWWA C207 – Steel Ring Flanges for Waterworks Service.
MSS Standards (Manufacturer's Standardization Society)
- MSS SP-44 – Steel Pipe Flanges (merged into ASME B16.47 Series A).
- MSS SP-51 – Flanges for Glass-Lined Equipment.
Material-Specific Standards (ASTM)
- ASTM A105 – Carbon Steel Forged Flanges.
- ASTM A182 – Alloy and Stainless Steel Forged Flanges.
- ASTM A350 – Carbon and Low-Alloy Steel Flanges for Low-Temperature Service.
- ASTM A694 – High-Strength Carbon and Alloy Steel Flanges for High-Pressure Applications.
Other Regional and Specialized Standards
- KS B1511 – Korean Standard Flanges.
- NF E29-206 – French Standard Flanges.
- SANS 1123 – South African Standard for Steel Flanges.

Why Ample Alloys For Industrial forged flange!

Choose Ample Alloys for your industrial forged flange needs and experience unmatched reliability, quality, and service.

Industry Expertise

With years of experience in manufacturing forged flanges, Ample Alloys has become a trusted supplier to industries like oil and gas, power generation, and petrochemicals.

On-Time Delivery

With a streamlined production process and robust supply chain, Ample Alloys ensures timely delivery, even for bulk or urgent orders.

Customization

Our forged flanges can be customized in terms of size, pressure rating, and design, providing the perfect solution for your specific applications.

Exceptional Quality

Ample Alloys manufactures industrial forged flanges that meet the highest international standards, ensuring long-lasting performance and reliability.

What are the different types of forged flanges?

Weld Neck Flanges
Slip-On Flanges
Blind Flanges
Threaded Flanges
Socket Weld Flanges
Lap Joint Flanges

What are the applications of forged flanges?

Forged flanges are used in various industries, including oil and gas, petrochemicals, power generation, water treatment, and marine applications, to securely connect pipe sections and equipment.

How are forged flanges tested for quality?

Forged flanges undergo several tests, including visual inspection, dimensional checks, mechanical testing, pressure testing, and sometimes non-destructive testing (NDT) methods to ensure they meet the required standards and specifications.