How do I choose a flange manufacturer?

When choosing a flange manufacturer, focus on product quality, the use of durable materials like stainless steel and carbon steel, and reliable testing processes. Kapoor Forge offers high-quality flanges that ensure strength and longevity. It’s important to select a manufacturer with a strong reputation for thorough testing and consistent product performance to meet your specific needs.

What are forged flanges, and why are they important?

Forged flanges are durable and high-Forged flanges are strong, steel components used to connect pipes and valves. Kapoor Forge produces high-quality, pressure-resistant flanges suitable for industries like oil & gas, petrochemical, and construction.

What types of flanges do you manufacture?

Kapoor Forge, a leading flanges manufacturer, produces a wide range of high-quality flanges designed for various industrial applications. Our flanges meet stringent industry standards, ensuring strength, durability, and reliability across sectors like oil & gas, petrochemical, and construction.

How can I order forged flanges and pipe fittings from Kapoor Forge?

Ordering forged flanges and pipe fittings from Kapoor Forge is easy. Simply visit our website at kapoorforge.com, browse our product catalog, and contact us through the online form or by phone.

Kapoor Forge

Name: Forged Flange
Brand: kapoor Forge
Rating: 5 (5 reviews)

SPECIALIZED ALLOY STEEL FLANGES MANUFACTURER, ASTM A182 LOW ALLOY STEEL FLANGES.

Kapoor Forge is a known Manufacturing, Exporting, and Supplying units of Alloy Steel Flanges, which is offered in different and individualized orders sizes, designs and of shapes for our recognized clienteles. We also offer the same in different grades like as Alloy Steel Flanges. These Alloy Steel Slip On Flanges can be machined, polished in stress relieved state if needed, where rust is the egregious visible substantiation of corrosive activity. Solution annealing of Alloy Steel Threaded Flanges isn’t necessary for the reason that the mechanical properties of raised state are showing desired values. An exception to this is that these Alloy Steel Weld Neck Flanges has some 24 chromium, and can be used to resist scaling at temperature up to 1100 Deg C. Our Alloy Steel Blind Flanges substantially occurs as a result of environmental factors similar as wind exposure, artificial pollution and elevated temperatures, and is worse near to the ocean, a main cause of salt water pollution. The high chromium content which is so good to the wet erosion resistance of these Alloy Steel Socket Weld Flanges is as well largely beneficial to their high temperature strength and resistance to scaling at elevated temperatures.

We are ISO Certified Manufacturer and Stockist of Alloy Steel Flange ANSI 150, Table D & Table E Alloy Steel Flange, Series A & B Alloy Grooved Flange, ASTM A182 Low Alloy Steel Lap Joint Flange, JIS Alloy Steel Orifice Flanges, PN10 PN16 Alloy Steel Slip On Flange Pressure Rating, Alloy Steel Threaded Flange at Reasonable Price.

Alloy Steel Flanges Standard Specifications
ASTM A182 Alloy Steel Flanges Grades
Alloy Steel Flanges Standards
Alloy Steel Flange Equivalent Grades
Alloy Steel Flanges Chemical Composition
Alloy Steel Flanges Mechanical Properties
ANSI B16.5 Alloy Steel Flange Weight Chart
Alloy Steel Flange Pressure Rating
Alloy Steel Flanges Industries and Applications
Alloy Steel Weld Neck Flange
Alloy Steel Long Weld Neck Flange
Alloy Steel Slip On Flange
Alloy Steel Spectacle Blind Flanges
Alloy Steel Socket Weld Flanges
Alloy Steel Blind Flanges / Dummy Flange

Alloy Steel Screwed / Threaded Flanges
Alloy Steel Orifice Flanges
Alloy Steel Lap Joint Flanges
Alloy Steel Square Flanges
Alloy Steel RTJ Flanges
Alloy Steel Reducing Flanges
Alloy Steel Weldolet Flange
Alloy Steel Nipolet Flange
Alloy Steel Backing Ring Flanges
Alloy Steel Ring Spacer Flanges
Alloy Steel Paddle Blind Flanges
Alloy Steel Plate Flange
Alloy Steel High Hub Blind Flange
Alloy Steel Custom Flanges
Alloy Steel Swivel Ring Flange

ALLOY STEEL FLANGE STANDARD SPECIFICATIONS

Product Name	Alloy Steel Flanges
Size Range	1/2″ (15 NB) to 48″ (1200NB)
Class / Pressure Rating	150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc.
Standards / Dimensions	ANSI/ASME B16.5, B16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, BS, GOST, MSS SP-44, ISO70051, JISB2220, BS1560-3.1, API7S-15, API7S-43, API605
Flange Face Types / Connection Type	Flat Face Flange (FF), Raised Face Flange (RF), Ring Joint Flange (RTJ), Lap Joint Flange, Male and Female Flange (M&F), Large and Small Tongue-and-Groove Flange (T&G)
Dimensions	ANSI B16.5, ANSI B16.47 Series A & B, ASA, API-605, MSS SP44, AWWA, Custom Drawings
Custom Design	As per your drawing \| AS, BS, ANSI, DIN, JIS \| Equal and Reducing Configurations
Material Test Certificates (MTC)	As per EN 10204 3.2 and EN 10204 3.1, Test Certificates certifying NACE MR0175, NACE MR0103
Test Certificates	100% Radiography Test Report, EN 10204/3.1B, Raw Materials Certificate, Third Party Inspection Report, etc
Tests	Hydrostatic testing machine, Direct-reading Spectrograph, UI trasonic flaw detector, X-ray detector, Magnetic particle detector
Equipment / Machines	Press machine, Pushing Machine, Bending machine, Sand-blasting machine, electric bevelling machine, etc.
Coating	Anti-rust Paint, Oil Black Paint, Yellow Transparent, Zinc Plated, Cold and Hot Dip Galvanized
Origin	Indian / USA / Japan / West Europe / Korean
Applications/Usage	Offshore, Oil Field, Shipbuilding, Water System, Natural Gas, Pipe Projects, Electric Power, etc.

ALLOY STEEL FLANGES AVAILABLE GRADES

Alloy Steel A182 F1 Flange	Alloy Steel A182 F5 Flange
Alloy Steel A182 F9 Flange	Alloy Steel A182 F11 Flange
Alloy Steel A182 F12 Flange	Alloy Steel A182 F22 Flange
Alloy Steel A182 F91 Flange

ALLOY STEEL FLANGE STANDARDS

ANSI/ASME B16.47 Flanges	ANSI/ASME B16.36 Flanges	ANSI/ASME B16.5 Flanges	Pr. EN1902-1 Flanges
DIN Flanges	JIS Flanges	BS 4504 Flanges	BS 10 Flanges
MSS SP-44 Flanges	JIS B2220 Flanges	KS B1503 Flanges	UNI Flanges
SABS/SANS 1123 Flanges	AS 2129, AS 4087 Flanges	ISO 9624, ISO 7005-1 Flanges	AWWA Flanges Standard
GOST Standard Flanges	API Flanges	AS/ANZ 4331.1 Flanges	Series A Flange
Series B Flange	SAE J518 Flanges	GB Flange	Norwegian Standard Flanges

ALLOY STEEL FLANGE INTERNATIONAL STANDARDS

Steel Grades	UNS Designation	Steel Names
ASTM A182 F1	K12822	C-0.5Mo
ASTM A182 F2	K12122	0.5Cr-0.5Mo
ASTM A182 F5	K41545	5Cr-0.5Mo
ASTM A182 F5a	K42544	5Cr-0.5Mo
ASTM A182 F9	K90941	9Cr-1Mo
ASTM A182 F10	S33100	20Ni-8Cr
ASTM A182 F91	K90901	9Cr-1Mo-V
ASTM A182 F92	K92460	9Cr-0.5Mo-1.8W-V
ASTM A182 F11 CL1	K11597	1.25Cr–0.5Mo–Si
ASTM A182 F11 CL2	K11572	1.25Cr–0.25Mo–Si
ASTM A182 F11 CL3	K11572	1.25Cr–0.5Mo–Si
ASTM A182 F12 CL1	K11562	1Cr-0.5Mo
ASTM A182 F12 CL2	K11564	1Cr-0.5Mo
ASTM A182 F22 CL1	K21590	2.25Cr-1Mo
ASTM A182 F22 CL3	K21590	2.25Cr-1Mo
ASTM A182 F21	K31545	3Cr-1Mo
ASTM A182 F122	K91271	–
ASTM A182 F911	K91061	–
ASTM A182 F3V	K31830	–
ASTM A182 F3VCb	K31390	–
ASTM A182 F22V	K31835	2.25Cr-1Mo-V
ASTM A182 F23	K41650	–
ASTM A182 F24	K30736	2.25Cr-1Mo-0.25V-Ti-B
ASTM A182 FR	K22035	–
ASTM A182 F36	K21001	1.15Ni-0.65Cu-Mo-Co

ALLOY STEEL FLANGES CHEMICAL COMPOSITION

ELEMENT & PROPERTIES	LOW ALLOY STEEL		MEDIUM ALLOY STEEL
ELEMENT & PROPERTIES	F11 CL2	F22 CL3	F5	F9
CARBON	0.10-0.20	0.05-0.15	0.15 MAX	0.15 MAX
MANGANESE	0.30-0.80	0.30-0.60	0.30-0.60	0.30-0.60
PHOSPHORUS MAX	0.040	0.040	0.03	0.030
SULFUR MAX	0.040	0.040	0.03	0.030
SILICON	0.50-1.00	0.50 MAX	0.50 MAX	0.50-1.00
NICKEL MAX	–	–	0.50	–
CHROMIUM	1.00-1.50	2.00-2.50	4.00-6.00	8.0-10.0
MOLYBDENUM	0.44-0.65	0.87-1.13	0.44-0.65	0.90-1.10
OPPER MA	–	–	–	–
COLUMBIUM MAX	–	–	–	–
VANADIUM MAX	–	–	–	–

ALLOY STEEL FLANGES MECHANICAL PROPERTIES

ELEMENT & PROPERTIES	LOW ALLOY STEEL		MEDIUM ALLOY STEEL
ELEMENT & PROPERTIES	F11 CL2	F22 CL3	F5	F9
TENSILE STRENGTH PSI (MPA)	70,000 (485)	75,000 (515)	70,000 (485)	85,000 (585)
YIELD STRENGTH PSI MIN	40,000 (275)	45,000 (310)	40,000 (275)	55,000 (380)
ELONGATION 2” % MIN	20	20	20	20
REDUCTION AREA % MIN	30	30	35	40
HARDNESS (HB) MAX*	143 ~ 207	156 ~ 207	143 ~ 217	179 ~ 217

ALLOY STEEL FLANGE WEIGHT CHART

ANSI B16.5 – ½” – 24” Forged Flanges Weight Chart:

CLASS	Nominal Pipe Size	Slip On	Threaded	Socket Weld	Lap Joint	Blind	Weld Neck
150 lb	½	1	1	2	1	2	2
	¾	2	2	2	2	2	2
	1	2	2	2	2	2	3
	1¼	3	3	3	3	3	3
	1½	3	3	3	3	4	4
	2	5	5	5	5	5	6
	2½	8	8	8	8	7	10
	3	9	9	9	9	9	11.5
	3½	11	12	11	11	13	12
	4	13	13	13	13	17	16.5
	5	15	15	15	15	20	21
	6	19	19	19	19	27	26
	8	30	30	30	30	47	42
	10	43	43	43	43	70	54
	12	64	64	64	64	123	88
	14	90	90	90	105	140	114
	16	106	98	98	140	180	140
	18	130	130	130	160	220	165
	20	165	165	165	195	285	197
	22	185	185	185	245	355	225
	24	220	220	220	275	430	268
CLASS	Nominal Pipe Size	Slip On	Threaded	Socket Weld	Lap Joint	Blind	Weld Neck
300 lb	½	2	2	3	2	2	2
	¾	3	3	3	3	3	3
	1	3	3	3	3	4	4
	1¼	4.5	4.5	4	4.5	6	5
	1½	6.5	6.5	6	6.5	7	7
	2	7	7	7	7	8	9
	2½	10	10	10	10	12	12
	3	13	14	13	14.5	16	18
	3½	17	17	17	17	21	20
	4	23.5	24	22	24	28	26.5
	5	29	31	28	28	37	36
	6	39	39	39	39	50	45
	8	58	58	58	58	81	69
	10	81	81	81	91	124	100
	12	115	115	115	140	185	142
	14	165	165	165	190	250	206
	16	210	220	190	234	315	250
	18	253	280	250	305	414	320
	20	315	325	315	375	515	400
	22	370	370	370	435	640	465
	24	490	490	475	550	800	580
CLASS	Nominal Pipe Size	Slip On	Threaded	Socket Weld	Lap Joint	Blind	Weld Neck
400 lb	½	2	2	2	2	2	3
	¾	3	3	3	3	3	3.5
	1	3.5	3.5	3.5	3.5	4	4
	1¼	4.5	4.5	4.5	4.5	6	4.5
	1½	6.5	6.5	6.5	6.5	8	8
	2	8	8	8	8	10	10
	2½	12	12	12	11	15	14
	3	15	15	15	14	20	18
	3½	21	21	21	20	29	26
	4	26	26	26	25	33	35
	5	31	31	31	29	44	43
	6	44	44	44	42	61	57
	8	67	67	67	64	100	89
	10	91	91	91	110	155	125
	12	130	130	130	152	226	175
	14	191	191	191	210	310	233
	16	253	253	253	280	398	295
	18	310	310	310	345	502	360
	20	378	378	378	420	621	445
	22	405	405	405	455	720	505
	24	539	539	539	615	936	640
CLASS	Nominal Pipe Size	Slip On	Threaded	Socket Weld	Lap Joint	Blind	Weld Neck
600 lb	½	2	2	2	2	3	3
	¾	3	3	3	3	4	4
	1	4	4	4	4	4	4
	1¼	5	5	5	5	6	6
	1½	7	7	7	7	8	8
	2	9	9	9	9	10	12
	2½	13	13	13	12	15	18
	3	16	16	16	15	20	23
	3½	21	21	21	20	29	26
	4	37	37	37	36	41	42
	5	63	63	63	63	68	68
	6	80	80	80	78	86	81
	8	115	115	115	112	140	120
	10	177	177	177	195	231	190
	12	215	215	215	240	295	226
	14	259	259	259	290	378	347
	16	366	366	366	400	527	481
	18	476	476	476	469	665	555
	20	612	612	612	604	855	690
	22	590	590	590	670	1000	720
	24	876	876	876	866	1250	977
CLASS	Nominal Pipe Size	Slip On	Threaded	Socket Weld	Lap Joint	Blind	Weld Neck
900 lb	½	6	6	6	6	4	7
	¾	6	6	6	6	6	7
	1	7.5	7.5	7.5	7.5	9	8.5
	1¼	10	10	10	10	10	10
	1½	14	14	14	14	14	14
	2	22	22	22	21	25	24
	2½	31	31	31	25	32	31
	3	36	36	36	29	35	36
	4	53	53	53	51	54	53
	5	83	83	83	81	87	86
	6	110	110	110	105	115	110
	8	172	172	172	190	200	187
	10	245	245	245	277	290	268
	12	326	326	326	371	415	372
	14	400	400	400	415	520	562
	16	459	459	459	488	619	685
	18	647	647	647	670	880	924
	20	792	792	792	868	1107	1164
	24	1480	1480	1480	1659	2099	2107
CLASS	Nominal Pipe Size	Slip On	Threaded	Socket Weld	Lap Joint	Blind	Weld Neck
1500 lb	½	6	6	6	6	4	7
	¾	6	6	6	6	6	7
	1	8	8	8	8	9	9
	1¼	10	10	10	10	10	10
	1½	14	14	14	14	14	14
	2	25	25	25	25	25	25
	2½	36	36	36	35	35	36
	3	48	48	48	47	48	48
	4	73	73	73	75	73	73
	5	132	132	132	140	140	132
	6	165	165	165	170	160	165
	8	260	260	260	286	302	275
	10	436	436	436	485	510	455
	12	667	667	667	749	775	690
	14	940	940	940	890	975	940
	16	1250	1250	1250	1250	1300	1250
	18	1625	1625	1625	1475	1750	1625
	20	2050	2050	2050	1775	2225	2050
	24	2825	2825	2825	2825	3625	3325
CLASS	Nominal Pipe Size	Slip On	Threaded	Socket Weld	Lap Joint	Blind	Weld Neck
2500 lb	½	….	7	….	7	7	8
	¾	….	9	….	8	10	9
	1	….	12	….	12	12	13
	1¼	….	18	….	17	18	20
	1½	….	25	….	24	25	28
	2	….	38	….	37	39	42
	2½	….	55	….	53	56	52
	3	….	83	….	80	86	94
	4	….	127	….	122	133	146
	5	….	210	….	204	223	244
	6	….	323	….	314	345	378
	8	….	485	….	471	533	576
	10	….	925	….	897	1025	1068
	12	….	1300	….	1262	1464	1608

ALLOY STEEL FLANGE PRESSURE RATING

The data sheet is divided by Classes: ASME B16.47 Series A are available in Classes 150, 300, 400, 600, 900; ASME B16.5 flanges are available in Class 150, 300, 400, 600, 900, 1500, 2500; and ASME B16.47 Series B are available in Classes 75, 150, 300, 400, 600, 900.

Temp. °F	Class 75 psi	Class 150 psi	Class 300 psi
-20~100	145	290	750
200	135	260	735
300	115	230	700
400	100	200	670
500	85	170	645
600	70	140	605
650	60	125	590
700	–	110	570
750	–	95	530
800	–	80	510
850	–	65	485
900	–	50	375
950	–	35	275
1000	–	20	200
1050	–	–	145
1100	–	–	95
1150	–	–	60
1200	–	–	35

Temp. °F	Class 400 psi	Class 600 psi	Class 900 psi
-20~100	1000	1500	2250
200	980	1470	2210
300	935	1400	2100
400	890	1335	2005
500	860	1290	1940
600	805	1210	1815
650	785	1175	1765
700	755	1135	1705
750	710	1065	1595
800	675	1015	1525
850	650	975	1460
900	500	745	1120
950	365	550	825
1000	265	400	595
1050	190	290	430
1100	130	190	290
1150	80	125	185
1200	45	70	105

Temp. °F	Class 1500 psi	Class 2500 psi
-20~100	3750	6250
200	3680	6135
300	3495	5830
400	3345	5570
500	3230	5385
600	3025	5040
650	2940	4905
700	2840	4730
750	2660	4430
800	2540	4230
850	2435	4060
900	1870	3115
950	1370	2285
1000	995	1655
1050	720	1200
1100	480	800
1150	310	515
1200	170	285