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Monel pipe

What is Monel pipe

What is seamless Monel pipe

Monel pipe is nickel-copper alloy pipe (seamless or welded) with high nickel and copper composition.

400 PMI

How to produce seamless Monel pipe

Monel Seamless pipes made by Monel round bar firstly will polish Monel round bar, as well as remove the fine cracks on the surface of the round bar.

after polishing, the round rod is perforated, which is the prototype of the pipes, we called them hollow pipes, the hollow pipes with wall thick thickness and a short length.

after piercing, the inner surface of the hollow bar will be polished again, it is mainly for the smoothness of the inner surface.

after perforated the bar, the hollow pipe will be under production by a cold drawing machine, the main is for reducing the thickness, and the length of pipes will be more longer after times of cold drawing. it will keep more than three times under cold drawing.

of course, after each cold drawing, the Monel pipe will be annealing, because, after the cold drawing, the hardness of the full Monel pipe will be harder. if with annealing, cold drawing again, the pipe will be cracked.

some new factories think Monel composition with high copper, it will be softer for cold drawing, and annealing cost is high now, Often in the production of steel pipe fracture is due to the lack of annealing process.

after the last time of annealing, for Monel material, it should the process of heat preservation. then correction of the pipe straightness, before cutting to fixed 6 meters length of Monel pipes, the main process is pickling.

the end produce of monel pipe, should be inspection , marking, packing.

nickel alloy pipe production

What is Monel seamless pipe used for?

monel seamless pipe is a kind of corrosion-resistant alloy with the largest amount, the most extensive use, and excellent comprehensive performance. The alloy has excellent corrosion resistance in hydrofluoric acid and fluorine gas medium, and also in hot concentrated alkali solution.

At the same time, it is also resistant to the corrosion of neutral solution, water, seawater, atmosphere, and organic compounds. An important feature of the alloy is that it does not produce stress corrosion crack and has the good cutting performance.

Monel seamless pipe is a multi-purpose material, which can be used in many industrial fields

1. Seamless water pipe and steam pipe in power plant

2. Seawater exchanger and evaporator

3. Sulfuric acid and hydrochloric acid environment

4. Crude oil distillation

5. Use the pump shaft and propeller of the equipment in seawater

6. The nuclear industry is used to manufacture equipment for uranium extraction and isotope separation

7. Manufacture of pumps and valves for hydrochloric acid production equipment

Monel pipe
stainless steel pipe

What is the hardness of Monel 400?

because monel with high copper composition, the hardness of monel 400 is more lower than stainless steel, the hardness will be 135-179HB.

What is the difference between Monel and stainless steel?

Chemical composition differenct

monel chemical composition:
Monel with high nickel and copper composition, these two items composition should be above 91%. the nickel should be above 63%, and the copper should be 28-34%.the Fe composition is less than 2%.

Monel 400 compostition

stainless steel chemical composition:
stainless steel is nickel and chrome alloy, these two item compositions should be near 20%, and the main chemical composition is iron, normal of stainless steel, the iron composition is near 70%.

stainless steel chemical composition

Different applications

The main difference between the different application areas, we know that seamless pipe is used in pipeline equipment, fluid transportation.

The Monel applications

MONEL alloy has excellent corrosion resistance in fluorine gas, hydrochloric acid, sulfuric acid, hydrofluoric acid, and their derivatives. It has good seawater corrosion resistance, chemical corrosion resistance, and chloride stress corrosion cracking resistance. The alloy is one of the few that can be used in fluoride. It has good resistance to oxidative stress fission corrosion in hydrofluoric acid and fluorine gas media, such as seawater and brine.

Special used for these industrial:

sulfuric acid and hydrofluoric acid equipment, marine heat exchanger, seawater desalination equipment, salt production equipment, marine and chemical processing equipment, propeller shaft and water pump, gasoline and water tank, etc

The stainless steel applications:

Stainless steel pipe can be divided into oil well pipe (casing, oil pipe, drill pipe, etc.), pipeline pipe, boiler pipe, mechanical structure pipe, hydraulic prop pipe, gas cylinder pipe, geological pipe, chemical pipe (high-pressure fertilizer pipe, petroleum cracking pipe), marine pipe, etc.

What type of material is monel?

monel 400, monel 401, monel 404, monel R-405, monel K500

Now all the high anti-corrosion engineering is mainly used of monel 400, This material is the most common and easily available.
in fact, everyone talk about monel material, the main point is talking about monel 400

Where can I get the cheap Monel seamless pipes?

Now, this is very easy to get material that you can buy from anywhere. There are many factories in China that produce some kinds of products, and we are one of them.

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