What is the difference between Monel 400 and Monel K500 flanges?

Monel 400 flanges provide excellent corrosion resistance with good strength, ideal for marine and chemical applications. Monel K500 flanges are precipitation-hardened, offering higher tensile strength and hardness for demanding, high-stress environments.

Are Monel flanges suitable for seawater applications?

Yes, Monel flanges are exceptionally suited for seawater environments. They resist saltwater corrosion, pitting, and marine biofouling, making them ideal for offshore platforms, shipbuilding, desalination plants, and underwater piping systems.

What is Monel used for?

Monel is widely used in marine engineering, chemical processing, aerospace, oil refineries, and heat exchangers. Its strength and corrosion resistance in extreme conditions make it ideal for pumps, valves, tubing, and high-pressure flanges.

What is the difference between Monel and 316?

Monel, a nickel-copper alloy, offers superior resistance to seawater and corrosive chemicals compared to 316 stainless steel, which is chromium-nickel-based. While 316 is cost-effective, Monel is preferred for harsh marine and high-performance uses.

What is the difference between Monel and Inconel?

Monel is primarily a nickel-copper alloy known for seawater resistance, while Inconel is a nickel-chromium alloy designed for extreme heat and oxidation resistance. Inconel performs better in high-temperature applications like turbines and exhaust systems.

Monel Flanges Supplier | Monel Flanges Manufacturers

Monel Flanges Manufacturer & Supplier in India

Monel Lap Joint Flanges, Monel Pipe Flanges, Monel Blind Flanges, Monel RTJ Flanges, Monel Plate Flanges, Monel Alloy Slip on Flanges, ANSI B16.5 Monel Alloy Flanges, Monel Weld Neck Flanges, Monel Socket Weld Flanges, Monel Flanges Suppliers

Solitaire Overseas is an Indian based Monel Flanges Manufacturers and Suppliers of nickel copper alloy elements designed to be used in harsh industrial environments. Our Monel flanges are produced by using high quality raw materials so that they offer the best resistance against corrosion, erosion and the high pressure of stress. These components are built to last for many years, and their functionality is necessary in the industrial sectors that must have materials that can resist the most hostile kind of chemical and marine conditions.

Our modernized production plant employs the latest forging, high precision machining and specialized heat treatment methodology, to attain high dimensional precision and mechanical integrity. We provide a full listing of Monel 400 Flanges and other grades of all standard types - weld neck, slip-on, blind, lap joint, and threaded. They come in pressure classes between 150 and 2500, fully complying with the ASTM B564, ASME B16.5, and other international standards and customized sizes will be provided to fit special needs of a project.

Our operations revolve around quality assurance. Each Monel flange is thoroughly tested in terms of chemical version, mechanical qualities, and dimensional tolerances and furnished with complete material traceability and inspection records. In the marine engineering and oil and gas sectors, chemical processing and offshore installations where reliability in extreme situations is absolutely needed, our products are a preferred choice.

Solitaire Overseas is a company that improves its pricing strategy with the effective global supply network to guarantee efficient and effective delivery to its customers all over the world. Corrosion resistant alloy piping solutions are another area where we are a one-stop shop, as we are committed to technical responsiveness and prompt logistics. Request a quote on Monel flanges of high strength that would meet your industry requirements.

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Monel Flanges Specifications
Monel Flanges Chemical Composition
Monel Flanges Mechanical Properties
Monel flanges Equivalent Material Grades
Monel Alloy Flanges Dimensions
Monel Alloy Flanges Weight Chart
Monel Flanges Pressure Rating
Monel Flanges Grades
Types of Monel Flanges
Applications of Monel Flanges
Related Products

Monel Flanges Specifications

Our Monel flanges are manufactured to the highest standards, ensuring exceptional performance and durability for a variety of industrial applications. Here are the detailed specifications for our range of Monel flanges.

Specification	Details
Specification	ASTM A564 / ASME SA564
Dimensions	ANSI / ASME B16.5, B16.47 Series A & B, B16.48, BS 4504, BS 10, EN 1092, DIN
Standards	ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges
Size	½” NB to 12” NB
Class / Pressure	150#, 300#, 600#, 900#, 1500#, 2500#, PN 6, PN 10, PN 16, PN 25, PN 40, PN 64
Flange Face Type	Flat Face (FF), Raised Face (RF), Ring Type Joint (RTJ)
DIN Flanges	DIN 2527, 2566, 2573, 2576, 2641, 2642, 2655, 2656, 2627, 2628, 2629, 2631, 2632, 2633, 2634, 2635, 2636, 2637, 2638, 2673
JIS Flanges	JIS B2220 5K, 10K, 16K, 20K
BS Flanges	BS 4504 PN 6, PN 10, PN 16, PN 25, PN 40, PN 64, PN 100, PN 160, PN 250, BS 10, BS Table D, BS Table E, BS Table F, BS Table H

Monel Flanges Chemical Composition

The chemical composition is what gives Monel flanges their superior corrosion resistance and high strength. Below are the precise elemental breakdowns for the Monel 400 and Monel K-500 grades we supply.

Grade (UNS)	Nickel (Ni)	Copper (Cu)	Iron (Fe)	Manganese (Mn)	Carbon (C)	Silicon (Si)	Sulfur (S)	Aluminum (Al)	Titanium (Ti)
Monel 400 (UNS N04400)	min. 63.0%	28.0–34.0%	max. 2.5%	max. 2.0%	max. 0.3%	max. 0.5%	max. 0.024%	—	—
Monel K-500 (UNS N05500)	min. 63.0%	27.0–33.0%	max. 2.0%	max. 1.5%	max. 0.25%	max. 0.5%	max. 0.01%	2.30–3.15%	0.35–0.85%

Monel Flanges Mechanical Properties

Monel's high-performance characteristics are defined by its robust mechanical properties. The table below shows a comparison of key metrics like tensile strength and hardness for Monel 400 and the age-hardenable Monel K-500.

Properties	Monel 400	Monel K-500
Tensile Strength	550 MPa (80 ksi) min	1100 MPa (160 ksi) min
Yield Strength	240 MPa (35 ksi) min	790 MPa (115 ksi) min
Elongation	35% min	20% min
Hardness (Brinell)	125–175 HB	265–300 HB

Monel flanges Equivalent Material Grades

Monel flanges are available in various international equivalents. These ensure consistent corrosion resistance, strength, and performance across global applications.

STANDARD	WERKSTOFF NR.	UNS	JIS	AFNOR	BS	GOST	EN
Monel 400	2.4360	N04400	NW 4400	NU-30M	NA 13	МНЖМц 28-2,5-1,5	NiCu30Fe
Monel K500	2.4375	N05500	-	-	-	-	-

Monel Alloy Flanges Dimensions

Monel Flanges are commonly used to connect valves into pipework making it easier for removal and maintenance. There are many common flange standards and flanges within the same standard can either be flat or raised face. Below is a reference table for critical flange dimensions.

Standard	Class	Diameter	Bolt Circle Diameter	Number of Bolts	Bolt Size	Diameter of Bolt Hole
15mm (1/2″)
ANSI B16.5	ANSI 150	89	60	4	13	16
	ANSI 300	95	67	4	13	16
	ANSI 600	95	67	4	13	16
	ANSI 900	121	83	4	19	22
	ANSI 1500	121	83	4	19	22
20mm (3/4″)
ANSI B16.5	ANSI 150	98	70	4	13	16
	ANSI 300	117	83	4	16	19
	ANSI 600	117	83	4	16	19
	ANSI 900	130	89	4	19	22
	ANSI 1500	130	89	4	19	22
25mm (1″)
ANSI B16.5	ANSI 150	110	79	4	13	16
	ANSI 300	125	89	4	16	19
	ANSI 600	125	89	4	16	19
	ANSI 900		102	4	22	25
	ANSI 1500		102	4	22	25
32mm (1 1/4″)
ANSI B16.5	ANSI 150	117	89	4	13	16
	ANSI 300	133	98	4	16	19
	ANSI 600	133	98	4	16	19
	ANSI 900	159	111	4	22	25
	ANSI 1500	159	111	4	22	25
40mm (1 1/2″)
ANSI B16.5	ANSI 150	127	98	4	13	16
	ANSI 300	156	114	4	19	22
	ANSI 600	156	114	4	19	22
	ANSI 900	178	124	4	25	29
	ANSI 1500	178	124	4	25	29
50mm (2″)
ANSI B16.5	ANSI 150	152	121	4	16	19
	ANSI 300	165	127	8	16	19
	ANSI 600	165	127	8	16	19
	ANSI 900	216	165	8	22	25
	ANSI 1500	216	165	8	22	25
65mm (2 1/2″)
ANSI B16.5	ANSI 150	178	140	4	16	19
	ANSI 300	191	149	8	19	22
	ANSI 600	191	149	8	19	22
	ANSI 900	244	191	8	22	25
	ANSI 1500	244	191	8	25	29
80mm (3″)
ANSI B16.5	ANSI 150	191	152	4	16	19
	ANSI 300	210	168	8	19	22
	ANSI 600	210	168	8	19	22
	ANSI 900	241	192	8	22	25
	ANSI 1500	267	203	8	29	32
100mm (4″)
ANSI B16.5	ANSI 150	229	191	8	16	19
	ANSI 300	254	200	8	19	22
	ANSI 600	273	216	8	22	25
	ANSI 900	292	235	8	29	32
	ANSI 1500	311	241	8	32	35
125mm (5″)
ANSI B16.5	ANSI 150	254	216	8	19	22
	ANSI 300	279	235	8	19	22
	ANSI 600	330	267	8	25	29
	ANSI 900	349	279	8	32	35
	ANSI 1500	375	292	8	38	41
150mm (6″)
ANSI B16.5	ANSI 150	279	241	8	19	22
	ANSI 300	318	270	12	19	22
	ANSI 600	356	292	12	25	29
	ANSI 900	381	318	12	29	32
	ANSI 1500	394	318	12	35	38
200mm (8″)
ANSI B16.5	ANSI 150	343	298	8	19	22
	ANSI 300	381	330	12	19	22
	ANSI 600	419	349	12	29	32
	ANSI 900	470	394	12	35	38
	ANSI 1500	483	394	12	41	44
250mm (10″)
ANSI B16.5	ANSI 150	406	362	12	22	25
	ANSI 300	445	387	16	25	29
	ANSI 600	508	432	16	32	35
	ANSI 900	546	470	16	35	38
	ANSI 1500	584	483	12	41	51
300mm (12″)
ANSI B16.5	ANSI 150	483	432	12	22	25
	ANSI 300	521	451	16	29	32
	ANSI 600	559	489	20	32	35
	ANSI 900	610	533	20	35	38
	ANSI 1500	673	571	16	51	54
350mm (14″)
ANSI B16.5	ANSI 150	533	476	12	25	29
	ANSI 300	584	514	20	29	32
	ANSI 600	603	527	20	38	41
	ANSI 900	641	559	20	38	41
	ANSI 1500	749	635	16	57	60
400mm (16″)
ANSI B16.5	ANSI 150	597	540	16	25	29
	ANSI 300	648	572	20	32	35
	ANSI 600	686	603	20	38	41
	ANSI 900	705	616	20	41	44
	ANSI 1500	826	705	16	64	67
450mm (18″)
ANSI B16.5	ANSI 150 Flange	635	578	16	29	32
	ANSI 300 Flange	711	629	24	32	35
	ANSI 600 Flange	743	654	20	41	44
	ANSI 900 Flange	787	686	20	48	51
	ANSI 1500 Flange	914	775	16	70	73
500mm (20″)
ANSI B16.5	ANSI 150 Flange	699	635	20	29	32
	ANSI 300 Flange	775	686	24	32	35
	ANSI 600 Flange	813	724	24	41	44
	ANSI 900 Flange	857	749	20	51	54
	ANSI 1500 Flange	984	832	16	76	79
600mm (24″)
ANSI B16.5	ANSI 150 Flanges	813	749	20	32	35
	ANSI 300 Flanges	914	813	24	38	41
	ANSI 600 Flanges	940	838	24	48	51
	ANSI 900 Flanges	1041	902	20	64	67
	ANSI 1500 Flanges	1168	991	16	89	92

Monel Alloy Flanges Weight Chart

Pipe Normal Diam.		O.D. Flange	Thk. Of Flange Min	Diam. of Hub	Diameter of Raised Face	Length Hub.Y	Thread Length	Diam. of Bolt Circle	Diam. of Bolt Holes	Number of Bolts	Diam. of Bolts (inch)	KG	LB
inch	dn	O	C	X	G	Y	T	BC	BH	BN	BD
1/2″	15	89.00	11.20	30.20	35.10	15.70	15.70	60.50	15.80	4	1/2″	0.4	0.9
3/4″	20	98.50	12.70	38.10	42.90	15.70	15.70	69.90	15.80	4	1/2″	0.7	1.5
1″	25	108.00	14.20	49.30	50.80	17.50	17.50	79.30	15.80	4	1/2″	0.8	1.8
1-1/4″	32	117.50	15.70	58.70	63.50	20.60	20.60	88.90	15.80	4	1/2″	1.2	2.6
1-1/2″	40	127.00	17.50	65.00	73.20	22.40	22.40	98.60	15.80	4	1/2″	1.5	3.3
2″	50	152.50	19.10	77.70	91.90	25.40	25.40	120.70	19.10	4	5/8″	2.3	5.1
2-1/2″	65	178.00	22.40	90.40	104.60	28.40	28.40	139.70	19.10	4	5/8″	3.7	8.1
3″	80	190.50	23.90	108.00	127.00	30.20	30.20	152.40	19.10	4	5/8″	4.1	9
3-1/2″	90	216.00	23.90	122.20	139.70	31.80	31.80	177.80	19.10	8	5/8″	5.1	11.2
4″	100	228.50	23.90	134.90	157.20	33.30	33.30	190.50	19.10	8	5/8″	5.9	13
5″	125	254.00	23.90	163.60	185.70	36.60	36.60	215.90	22.40	8	3/4″	7	15.4
6″	150	279.50	25.40	192.00	215.90	39.60	39.60	241.30	22.40	8	3/4″	8.4	18.5
8″	200	343.00	28.40	246.10	269.70	44.50	44.50	298.50	22.40	8	3/4″	13	28.6
10″	250	406.50	30.20	304.80	323.90	49.30	49.30	362.00	25.40	12	7/8″	18	39.5
12″	300	482.50	31.80	365.30	381.00	55.60	55.60	431.80	25.40	12	7/8″	29	64
14″	350	533.50	35.10	400.10	412.80	57.20	57.20	476.30	28.50	12	1″	39	86
16″	400	597.00	36.60	457.20	469.90	63.50	63.50	539.80	28.50	16	1″	47	103
18″	450	635.00	39.60	505.00	533.40	68.30	68.30	577.90	31.80	16	1 1/8″	57	126
20″	500	698.50	42.90	558.80	584.20	73.20	73.20	635.00	31.80	20	1 1/8″	76	167
24″	600	813.00	47.80	663.40	692.20	82.60	82.60	749.30	35.10	20	1 1/4″	97	214

Monel Flanges Pressure Rating

ANSI/ASME B16.34	PRESSURE RATING CHART
Temperature °F	150#	300#	400#	600#	900#	1500#	2500#
-20 to 100	275	720	960	1440	2160	3600	6000
200	230	600	800	1200	1800	3000	5000
300	205	540	720	1080	1620	2700	4500
400	190	495	660	995	1490	2485	4140
500	170	465	620	930	1395	2330	3880
600	140	435	580	875	1310	2185	3640
650	125	430	575	860	1290	2150	3580
700	110	425	565	850	1275	2125	3540
750	95	415	555	830	1245	2075	3460
800	80	405	540	805	1210	2015	3360
850	65	395	530	790	1190	1980	3300
900	50	390	520	780	1165	1945	3240
950	35	380	510	765	1145	1910	3180
1000	20	320	430	640	965	1605	2675
1050	20	310	410	615	925	1545	2570
1100	20	255	345	515	770	1285	2145
1150	20	200	265	400	595	995	1655
1200	20	155	205	310	465	770	1285
1250	20	115	150	225	340	565	945
1300	20	85	115	170	255	430	715
1350	20	60	80	125	185	310	515
1400	20	50	65	95	145	240	400
1450	15	35	45	70	105	170	285
1500	10	25	35	55	80	135	230

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Monel Flanges Grades

Solitaire Overseas has two distinguishable grades of Monel flanges namely Monel 400, and Monel K500. Although both grades are very desirable due to their excellent corrosion resistance, they can be distinguished by their unique mechanical characteristics and uses to be customized to suit specific performance requirements in different industries.

Monel 400 Flanges

The Monel 400 flanges are the best products to use in the marine and chemical processing systems because of their brilliant resistance against corrosion in salt, acid and alkaline environments. These flanges offer a compromise of relatively high strength and a good weldability. They are usually stipulated to be used in essential parts of a system like pumps, valves, piping systems, and heat exchangers where long term durability and highly dependable services are needed.

Monel K-500 Flanges

Monel K-500 flanges are Monel 400 flanges with much higher strength and hardness over which they combine the built-in corrosion resistance. This is attained by the process of age-hardening which is controlled. Such flanges are developed so as to ensure high mechanical integrity even when they are at cryogenic temperatures. Their improved qualities render them appropriate in challenging and high stresses such as marine propeller shafts, oil drills tools, and turbine blades whereby durability as well as dimensional stability is urgent.

Types of Monel Flanges

Solitaire Overseas offer a wide variety of Monel flanges that have been well made to sustain high-performance piping systems. All types of flanges are highly forged and come in many classes of pressure, including Class 150 through 2500, so that you will have no trouble meeting the requirements of both the international standards and the requirements of your application.

Weld Neck Flange (WNRF): This flange is designed to operate under high pressure and high temperature applications with heavy butt-welded joints minimizing the stress concentration and providing a secure and airtight seal.
Slip-On Flange (SORF): This is a flange that is made to be installed conveniently and economically in any lower-pressure system, and it is simple to install and align and minimal welding is required to fasten it to the pipe.
Blind Flange (BLRF): This type of flange used to end the terminus of a piping system or valve opening offers a sure and permanent seal, which would stop the flow of the media and allow the system to be extended in the future.
Socket Weld Flange (SWRF): Usable in high pressure pipelines with small diameter, this type of connection is compact, high and strong, used because it has a high fatigue strength and it has smooth bore.
Threaded Flange (THRF): This is a type of flange that gets screwed to the pipe and is therefore the best choice in the situations where weld cannot be done or it is not allowed. It provides a fast, safe fixing without thermal stress.
Lap Joint Flange (LJRF): It is usually used together with a stub end, which is an affordable option in cases when a system needs to be disassembled frequently to perform inspection or modifications. The flange is freely rotating making it easy to align the bolt holes.
Orifice Flange: This flange is specifically designed to measure the flow and as such, it has a series of bolts and jackscrews that allow the orifice plates to be fitted on the flange to measure the flow rate of liquids or gases.

Applications of Monel Flanges

Monel flanges are essential in environments where high-strength and superior corrosion resistance are required. We supply these components to a diverse range of sectors, including:

Chemical & Petrochemical: They are widely used to work with corrosive chemicals and high-pressure fluids.
Pharmaceutical: Suited to high levels of purity and lack of degradation under sanitary processing.
Power Generation: This is used in thermal and nuclear power plants where high temperature oxidation resistance and steam resistance are critical.
Engineering & Heavy Industry: Built in special industrial equipment and high-valued piping systems.
Marine & Offshore: Reliable in the seawater conditions, they are highly resistant to stress corrosion and erosion caused by chlorides.

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Monel Flanges Quality Assurance

In order to achieve the requirements of the international safety and durability of all flanges, we develop a multi-layered quality control procedure:

Certification: Test Certificates are issued on all products according to EN 10204 / 3.1B.
Material Inspection: We present Detailed Raw Materials Certificate to ensure the quality of our nickel-copper alloys.
High-level Testing: A 100 per cent Radiography Test Report is done on every flange to identify any internal defects or anomalies.
Independent Validation: Based on this, we help in Third-Party Inspection Reporting to offer an impartial assurance of quality and compliance.
Traceability: The material traceability is full at all stages of the raw material till the final product, and there is transparency of all important installations.