Monel Pipes Manufacturer & Supplier

Monel Pipe is a high-performance nickel-copper alloy pipe known for strength and corrosion resistance especially in seawater and chemical environments. These pipes are made up of 66% nickel and 31.5% copper and also include small traces of iron, manganese, carbon, and silicon for added durability. Midland Alloys Inc. is a trusted monel pipe manufacturers, providing top-quality monel seamless pipe and monel welded pipe that meet ASTM B163, B165, B725, and B730 standards. Our ASME SB725 monel pipe size range from 15″NB to 150″NB, and 6.35 mm OD up to 254 mm OD with 0.6 to 20 mm thickness. Manufactured in monel alloy 400 and monel alloy K-500 grades using melting, hot and cold working, and precise heat treatment to ensure strength and consistency. Monel seamless pipe is ideal for high-pressure use and welded pipe is suitable for large-diameter, low-pressure systems. We provide pipes in round, square, rectangular, and hydraulic forms and customizable to size, form, and dimension needs.

Benefits of Monel Pipe

Monel pipe offers a mix of strength and durability that makes it stand out in tough environments. Its ability to handle both pressure and corrosion makes it a trusted choice in many industries.

Handle sudden temperature changes without cracking or losing strength which make it reliable in extreme service.
Keeps its toughness even in high-pressure steam and gas systems where other metals may weaken.
These pipes are resistant to pitting and crevice corrosion better than stainless steel pipe even in aggressive environment.
Performs well in both fresh and salt water service, offering long-term protection against seawater damage.
Easier to machine and weld compared to several other nickel alloys, saving time during fabrication.
Offers long service life which help to cut down on frequent maintenance and replacement costs.
Monel alloy pipe maintain stability in both acidic and alkaline conditions, giving it wide chemical resistance.

Monel vs Inconel Pipe

Monel pipe and Inconel pipe both resist corrosion, but they serve different needs. Monel pipe, with its high nickel-copper mix, performs best in saltwater and hydrofluoric acid environments. In contrast, Inconel pipe—made with nickel, chromium, and iron—handles extreme heat better which make it suitable for high-temperature furnace and reactor systems. Monel pipe is more flexible and easier to machine, while inconel pipe offers better resistance to oxidation and creep at high temperatures. Monel steel pipe is also generally more cost-effective than Inconel in marine and moderate heat settings. SCH40 Monel pipe provides strength without the higher cost of Inconel.

Specification of Monel Pipes

Types of Monel Pipes

Manufacturing Types

Seamless Pipe

Weld-free, perfect for even strength and sizing precision.
Welded Pipe

Welded from flat-rolled steel, widely used where economy and large sizes are required.
ERW Pipe

Electric Resistance Welded (ERW) pipes provide neat, high quality weld seams and are ideal for medium-pressure applications.
EFW Pipe

Electric Fusion Welded (EFW) pipes are welded by fusion welding, usually applied in larger diameters and high-demand processes.

Pipe Forms

Round Pipe

The most common shape for fluid and gas transport.
Square Pipe

Used in architectural and structural applications requiring angular profiles.
Rectangular Pipe

Provides greater strength in load-bearing regions and flat structures.
Hydraulic Pipe

Designed to provide precise dimensional control for fluid systems under pressure.

Contact Midland Alloys Inc. for Your Monel Pipes Needs

Contact us today to discuss how Monel Pipes can benefit your application. Whether you need guidance in selecting the right pipes or have specific requirements, our team of experts is here to help you find the optimal solution.

Monel Pipes Grades We Offer

Monel Pipes

Monel 400 Pipes

Monel K500 Pipes

Pipe Dimensions

Weight Chart

Pipe Dimensions

Monel Pipe Dimensions

Nominal size [inches]	Outside diameter (OD) [inches]	Outside diameter (OD) [mm]	Wall thickness [inches]	Wall thickness [mm]	Weight [lb/ft]	Weight [kg/m]
1/8″ NPS 6	0.41	10.3	0.068	1.73	0.24	0.37
1/4″ NPS 8	0.54	13.7	0.088	2.24	0.42	0.63
3/8″ NPS 10	0.68	17.1	0.091	2.31	0.57	0.84
1/2″ NPS 15	0.84	21.3	0.109	2.77	0.85	1.27
3/4″ NPS 20	1.05	26.7	0.113	2.87	1.13	1.69
1″ NPS 25	1.32	33.4	0.133	3.38	1.68	2.5
1 1/4″ NPS 32	1.66	42.2	0.14	3.56	2.27	3.39
1 1/2″ NPS 40	1.9	48.3	0.145	3.68	2.72	4.05
2″ NPS 50	2.375	60.3	0.154	3.91	3.65	5.44
2 1/2″ NPS 65	2.875	73.0	0.203	5.16	5.79	8.63
3″ NPS 80	3.5	88.9	0.216	5.49	7.58	11.29
3 1/2″ NPS 90	4.0	101.6	0.226	5.74	9.11	13.57
4″ NPS 100	4.5	114.3	0.237	6.02	10.79	16.07
5″ NPS 125	5.563	141.3	0.258	6.55	14.62	21.77
6″ NPS 150	6.625	168.3	0.28	7.11	18.97	28.26
8″ NPS 200	8.625	219.1	0.322	8.18	28.55	42.55
10″ NPS 250	10.75	273.0	0.365	9.27	40.48	60.31
12″ NPS 300	12.75	323.8	0.406	10.31	53.52	79.73
14″ NPS 350	14.0	355.6	0.437	11.13	54.57	94.55
16″ NPS 400	16.0	406.4	0.5	12.7	82.77	123.3
18″ NPS 450	18.0	457.0	0.562	14.27	104.67	155.8
20″ NPS 500	20.0	508.0	0.594	15.09	123.11	183.42
24″ NPS 600	24.0	610.0	0.688	17.48	171.29	255.41
32″ NPS 800	32.0	813.0	0.688	17.48	230.08	342.91

Weight Chart

Manufacturing Process of Monel Pipes

Round Bar

Analytic

Cut to Length

Centering

Heating

Perforation

Inspection of Size

Pickling

Inspection of Surface

Lubricating

Cold Drawing (Cold Rolling)

Degreasing

Annealing

Straightening

Cut

Pickling / Passivating

Inspection

Analytic

Marking

Packing & Shipping

Applications of Monel Pipes

Monel pipe is used in industries where exposure to seawater, acids, or high-pressure gases is common. In the marine industry, it’s perfect for piping systems on ships and offshore rigs due to its resistance to saltwater corrosion. In chemical processing plants, monel seamless pipe handle aggressive chemicals without breakdown. It is widely used in oil refineries for heat exchangers and condenser tubes. In the aerospace field, Monel pipe used in fuel and hydraulic lines where both strength and corrosion resistance are critical. Power plants use monel welded pipe in steam systems that face high pressure and temperature. It also supports food and pharmaceutical plants for clean, hygienic fluid transport without metal leaching.

Offshore Industry

Nuclear Industries

Refineries

Ship Building

Aerospace

Pharmaceutical

Why Choose Midland Alloys Inc. for Monel Pipes

Midland Alloys Inc. is a trusted Monel pipe supplier known for quality, precision, and customer-first service. We are certified to ISO 9001:2015 and PED 2014/68/EU, and provide EN 10204 3.1/3.2 Mill Test Certificates with every order. Our team support third-party inspections from TÜV, SGS, BV, and DNV. We work closely with EPC contractors, marine engineers, and chemical processing units to deliver pipes that meet project needs. Each pipe go through in-house and third-party testing like hydrostatic pressure, UT, RT, and PMI testing. We also perform tensile, flattening, and bend tests. We have earned repeat business from clients across the Middle East, Europe, and Southeast Asia. Our monel pipe price is based on size, length, grade, and standards. We ensure fast delivery, dependable support, and expert compliance with international shipping and documentation standards.

Frequently Asked Questions About Monel Pipes

What is the temperature range for using Monel pipe?

Up to 480°C for regular use and down to -100°C in cold environments.

Can Monel pipe be welded?

Yes. Monel Welded Pipe can be joined using TIG or MIG welding with matching filler metals.

Is Monel pipe cost-effective?

Yes. It lasts longer in harsh environments, lowering maintenance and replacement costs.

Products Categories

ISO Certificate

NPS	Outside Diameter		Wall Thickness			Weight	Weight
NPS	in	mm	in	mm	Sched	kg/Mtr	Lb/ft
1/2″	0.840	21	0.109	2.769	40 STD	1.268	0.851
			0.147	3.734	80 STD	1.621	1.088
3/4″	1.050	27	0.113	2.870	40 STD	1.684	1.131
			0.154	3.912	80 STD	2.195	1.474
1″	1.315	33	0.133	3.378	40 STD	2.501	1.679
			0.179	4.547	80 STD	3.325	2.172
1 1/4″	1.660	42	0.140	3.556	40 STD	3.385	2.273
			0.191	4.851	80 STD	4.464	2.997
1 1/2″	1.900	48	0.145	3.683	40 STD	4.048	2.718
			0.200	5.080	80 STD	5.409	3.361
2″	2.375	60	0.154	3.912	40 STD	5.441	3.653
			0.218	5.537	80 STD	7.480	5.022
2 1/2″	2.875	73	0.203	5.516	40 STD	8.629	5.793
			0.276	7.010	80 STD	11.411	7.661
3″	3.500	89	0.216	5.486	40 STD	11.284	7.576
			0.300	7.620	80 STD	15.272	10.253
4″	4.500	114	0.237	6.020		16.073	10.790
			0.337	8.560		22.318	14.983
6″	6.625	168	0.188	4.775		19.252	12.924
			0.203	5.516		20.739	13.923
			0.219	5.563		22.318	14.983
			0.250	6.350		25.354	17.021
			0.280	7.112	40 STD	58.263	18.974
			0.312	7.925		31.334	21.036
			0.375	9.525		37.285	25.031
			0.432	10.973	80 XHY	42.561	28.573
			0.500	12.700		48.719	32.708
8″	8.625	219	0.188	4.775		25.233	16.940
			0.203	5.156		27.198	18.259
			0.219	5.563		29.286	19.661
			0.250	6.350	20	33.308	22.361
			0.277	7.036	30	36.786	24.696
			0.322	8.179	40	42.352	28.554
			0.375	9.525		49.216	33.041
			0.406	10.312	60	53.085	35.638
			0.500	12.700	80 XHY	64.627	43.388
10″	10.750	273	0.188	4.775		31.588	21.207
			0.219	5.563		36.689	24.631
			0.250	6.350	20	41.759	28.035
			0.307	7.798	30	51.002	34.240
			0.344	8.738		56.946	38.231
			0.365	9.271	40 STD	63.301	40.483
			0.438	11.125		71.852	48.238
			0.500	12.700	60 XHY	81.530	54.735
			0.594	15.088	80	95.969	64.429
12″	12.750	324	0.188	4.775		37.570	25.222
			0.219	5.563		43.657	29.309
			0.250	6.350		49.713	33.375
			0.281	7.137		55.739	37.420
			0.312	7.925		61.735	41.445
			0.375	9.525		73.824	49.562
			0.406	10.312		79.727	53.525
			0.500	12.700		97.438	65.415
			0.562	14.275		108.966	73.154
14″	14.000	356	0.188	4.775		41.308	27.732
			0.219	5.563		48.012	32.233
			0.250	6.350	20	54.685	36.713
			0.281	7.137		61.327	41.172
			0.312	7.925		67.939	45.611
			0.375	9.525	STD	81.281	54.568
			0.438	11.125	40	94.498	63.441
			0.500	12.700	XHY	107.381	72.090
			0.625	15.875		132.983	89.278
16”	16.000	406	0.188	4.775		47.290	21.748
			0.219	5.563		54.980	36.910
			0.250	6.350	10	62.639	42.053
			0.281	7.137		70.268	47.174
			0.312	7.925	20	77.866	52.275
			0.344	8.738		85.677	57.519
			0.375	9.525	30 STD	93.213	62.578
			0.438	11.125		108.433	72.797
			0.500	12.700	40 XHY	123.289	82.770
18″	18.000	457	0.219	5.563		61.948	41.588
			0.250	6.350		70.593	47.393
			0.281	7.137		79.208	53.176
			0.312	7.925	20	87.792	58.939
			0.375	9.525	STD	105.144	70.588
			0.438	11.125	30	122.369	82.152
			0.500	12.700	XHY	139.198	93.450
			0.562	14.275	40	155.904	104.666
			0.625	15.875		172.754	115.978
20″	20.000	508	0.250	6.350		78.547	52.733
			0.282	7.163		88.458	59.386
			0.312	7.925		97.719	65.604
			0.375	9.525	20 STD	117.075	78.598
			0.438	11.125		136.305	91.508
			0.500	12.700	30 XHY	155.106	104.130
			0.594	15.088	40	183.378	123.110
			0.625	15.875		192.640	129.328
			0.688	17.475		211.368	141.901
24″	24.000	610	0.250	6.350		94.456	63.413
			0.281	7.137		106.029	71.183
			0.312	7.925		117.573	18.932
			0.375	9.525	20 STD	140.938	64.618
			0.438	11.125		164.176	110.219
			0.500	12.700	XHY	186.923	125.490
			0.625	15.875		232.410	156.028
			0.688	17.475	40	255.148	171.293
			0.750	19.050		277.401	186.233
30″	30.000	762	0.250	6.350		118.318	79.433
			0.281	7.137		132.851	89.189
			0.312	7.925	10	147.353	98.925
			0.375	9.525	STD	176.731	118.648
			0.438	11.125		205.983	138.286
			0.500	12.700	20 XHY	234.647	157.530
			0.625	15.875	30	292.066	196.078
			0.688	17.475		320.817	215.380
			0.750	19.050		348.988	234.293
36″	36.000	914	0.250	6.350		142.180	95.453
			0.281	7.137		159.672	107.196
			0.312	7.925	10	177.133	118.918
			0.375	9.525	STD	215.525	142.678
			0.438	11.125		247.790	166.353
			0.500	12.700	20 XHY	282.372	198.570
			0.625	15.875		351.723	236.128
			0.688	17.475		386.487	259.467
			0.750	19.050		420.576	282.353
42″	42.000	1067	0.312	7.925		206.914	138.911
			0.375	9.525	STD	248.319	166.708
			0.500	12.700	XHY	33.097	221.610
			0.750	19.050		492.163	330.413
48″	48.000	1219	0.375	9.525	STD	284.112	190.738
			0.438	11.125		331.404	222.487
			0.500	12.700	XHY	377.822	253.650
			0.750	19.050		563.750	378.473
			0.875	22.225		655.969	440.383