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 CARBON FLANGES MANUFACTURER, LOW TEMPERATURE CARBON STEEL ANSI FLANGE.

Kapoor Forge is leading Manufacturers, Suppliers, and Exporters of Carbon Steel Flanges. As compared to stainless steel grade, the carbon steel flanges have a high carbon steel content. This high content of the carbon is what give the carbon steel plate flanges a less melting point. An raised carbon steel content in Carbon Steel Slip on Flanges make them more malleable. Further, these flanges have good continuity and they offer better heat distribution properties. Generally, Carbon Steel Blind Flange are primarily an iron carbon steel alloy. The carbon steel socket weld flange contains up to 2.06 of carbon with an addition of over to 1.65 of manganese. Apart from the small quantum of manganese, the carbon steel slip on flanges contains trace quantities of other essentials like as 0.5 of silicon and sulfur and phosphorus as contamination.

We are ISO Certified Manufacturer and Stockist of Carbon Blind Flange, Carbon Steel Flange Class 150, Carbon Steel Companion Flange, Carbon Steel PN16 Flange, Carbon Steel Puddle Flange, Carbon Steel Flange Pn16, Carbon Steel Threaded Flange, Carbon Steel Flange Temperature Rating, Carbon Steel Backup Flange, Carbon Steel Vanstone Flange, Carbon Steel 300# Flange, 150# Carbon Steel Flange at Reasonable Price.

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

Carbon Steel Screwed / Threaded Flanges
Carbon Steel Orifice Flanges
Carbon Steel Lap Joint Flanges
Carbon Steel Square Flanges
Carbon Steel RTJ Flanges
Carbon Steel Tongue and Groove Flange
Carbon Steel Expander Flanges
Carbon Steel Reducing Flanges
Carbon Steel Weldolet Flange
Carbon Steel Nipolet Flange
Carbon Steel Backing Ring Flanges
Carbon Steel Ring Spacer Flanges
Carbon Steel Paddle Blind Flanges
Carbon Steel Plate Flange
Carbon Steel Custom Flanges
Carbon Steel Swivel Ring Flange

CARBON STEEL FLANGE STANDARD SPECIFICATIONS

Product Name	Carbon 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.

CARBON STEEL FLANGES AVAILABLE GRADES

ASTM A105 Flange	ASTM A350 Flange	ASTM A694 Flange
SS400 Flange	SF440 Flange	ST37-2 Flange
S235JrG2 Flange	P250GH Flange	C22.8 Flange

CARBON 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

CARBON STEEL FLANGES CHEMICAL COMPOSITION

Grades	C	Mn	P	S	Si	Cu	Ni	Cr	Mo	V
A105	–	0.60	–	–	0.10	–	–	–
A105	0.35	1.05	0.035	0.040	0.35	0.40	0.40	0.30	0.12	0.08

Grades	C%	Mn%	Si%	S%	P%	Cr%	Ni%
A350 LF1	0.30 max	0.6/1.35	.15/.30	.040 max	.035 max	0.30 max	0.40 max
A350 LF2	0.30 max	0.6/1.35	.15/.30	.040 max	.035 max	0.30 max	0.40 max
A350 LF3	0.20 max	0.9	.20/.35	.040 max	.035 max	0.30 max	3.3/3.7

ASTM A694 F42	0.26-0.265	1.60-1.64	0.025-0.030	0.025-0.030	0.15-0.35
ASTM A694 F52	0.26-0.265	1.60-1.64	0.025-0.030	0.025-0.030	0.15-0.35
ASTM A694 F60	0.26-0.265	1.60-1.64	0.025-0.030	0.025-0.030	0.15-0.35
ASTM A694 F65	0.26-0.265	1.60-1.64	0.025-0.030	0.025-0.030	0.15-0.35

CARBON STEEL FLANGES MECHANICAL PROPERTIES

Property	ASTM A105	ASTM A350-LF2
Tensile Strength Min, psi	70,000	70,000-95,000
Tensile Strength Min, N/mm²	485	485-655
Yield Strength Min, psi	36,000	36,000
Yield Strength Min, N/mm²	250	250
Elongation (%)	22	22
Reduction of Area (%)	30	30
Hardness, maximum	187	15/12 ft-lbs
CVN at -50℉		20/16 joules

ASTM A694 Flange Material Grade	Min Yield Strength (0.2 % Offset), in ksi [MPa]	MinTensile Strength	Elongation in 2 in. or 50 mm, min %
ASTM A694 Flange Material Grade	Min Yield Strength (0.2 % Offset), in ksi [MPa]	in ksi [MPa]	Elongation in 2 in. or 50 mm, min %
A694 F42	42 [290]	60 [415]	20
A694 F46	46 [315]	60 [415]	20
A694 F48	48 [330]	62 [425]	20
A694 F50	50 [345]	64 [440]	20
A694 F52	52 [360]	66 [455]	20
A694 F56	56 [385]	68 [470]	20
A694 F60	60 [415]	75 [515]	20
A694 F65	65 [450]	77 [530]	20
A694 F70	70 [485]	82 [565]	18

CARBON 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

CARBON STEEL FLANGE PRESSURE RATING

Temp. °C	Working Pressures by Classes, bar
Temp. °C	75#	150#	300#	400#
−29~38	9.8	19.6	51.1	68.1
50	9.6	19.2	50.1	66.8
100	8.8	17.7	46.6	62.1
150	7.9	15.8	45.1	60.1
200	6.9	13.8	43.8	58.4
250	6.0	12.1	41.9	55.9
300	5.1	10.2	39.8	53.1
325	4.6	9.3	38.7	51.6
350	3.1	8.4	37.6	50.1
375	–	7.4	36.4	48.5
400	–	6.5	34.7	46.3
425	–	5.5	28.8	38.4
450	–	4.6	23.0	30.7
475	–	3.7	17.4	23.2
500	–	2.8	11.8	15.7
538	–	1.4	5.9	7.9

Temp. °C	Working Pressures by Classes, bar
Temp. °C	600#	900#	1500#	2500#
-29~38	102.1	153.2	255.3	425.5
50	100.2	150.4	250.6	417.7
100	93.2	139.8	233.0	388.3
150	90.2	135.2	225.4	375.6
200	87.6	131.4	219.0	365.0
250	83.9	125.8	209.7	349.5
300	79.6	119.5	199.1	331.8
325	77.4	116.1	193.6	322.6
350	75.1	112.7	187.8	313.0
375	72.7	109.1	181.8	303.1
400	69.4	104.2	173.6	289.3
425	57.5	86.3	143.8	239.7
450	46.0	69.0	115.0	191.7
475	34.9	52.3	87.2	145.3
500	23.5	35.3	58.8	97.9
538	11.8	17.7	29.5	49.2

Temp. °F	Working Pressures by Classes, psi
Temp. °F	75#	150#	300#	400#
-20~100	140	285	740	985
200	130	260	680	905
300	115	230	655	870
400	100	200	635	845
500	85	170	605	805
600	70	140	570	755
650	60	125	550	730
700	–	110	530	710
750	–	95	505	675
800	–	80	410	550
850	–	65	320	425
900	–	50	230	305
950	–	35	135	185
1000	–	20	85	115

Temp. °F	Working Pressures by Classes, psi
Temp. °F	600#	900#	1500#	2500#
-20~100	1480	2220	3705	6170
200	1360	2035	3395	5655
300	1310	1965	3270	5450
400	1265	1900	3170	5280
500	1205	1810	3015	5025
600	1135	1705	2840	4730
650	1100	1650	2745	4575
700	1060	1590	2655	4425
750	1015	1520	2535	4230
800	825	1235	2055	3430
850	640	955	1595	2655
900	460	690	1150	1915
950	275	410	685	1145
1000	170	255	430	715