Flexible metal hose also called corrugated metal hose is suitable for a wide range of industrial applications, combining the advantages of high physical strength, long life and good corrosion characteristics. It is also suitable for conveying all types of liquids and gases within a temperature range of -160°C to +700°C.
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Stainless steel corrugated hose is a general purpose industrial hose and is available in different grades of stainless steel including 304, 316L, 321,etc.There are many different kinds of metal hose fittings,such as gas hose fitting,quick camlock,flange,NPT fittings,BSP fittings,etc.The flexible metal hose with fittings is more conducive to function in the piping system.
Flexible metal braided hose eliminate the problems of rigid connection and can be used in all kinds of steam, water, oil and gas systems with its pressure resistance and elastic structure.In complex piping systems, there are often difficulties due to space position conditions, resulting in installation difficulties.The flexible metalic hose is extremely flexible due to its ability to bend at will and bend under the rated bending radius. Therefore, it can removal of problems caused by assembly.
The corrugated hose is manufactured from a cylindrical, thin walled tube formed from rolled strip and welded at the seam. Impressed into this tube is a corrugated annular profile. Annular corrugation means each convolution is perpendicular to the centre line of the hose giving a distinct advantage of movement with each corrugation being relatively independent of movement from each other.
When the corrugations are closely spaced, the hose is referred to as ‘closed pitch’ hose. Conversely, when the corrugations are more widely spaced, the hose is referred to as ‘open pitch’.
Comflex corrugated metal hoses are manufactured from quality proven components and cutting-edge technology.The bellow is the body of the metal hose, which plays the role of flexibility; the wire braids play the role of strengthening and shielding; the fitting acts as a connection. For different use requirements, the ways of connecting them are different: the bellows,wire braid and fittings are connected by welding, called welding type; they are connected by mechanical clamping, called mechanical clamping type; In addition,there is a combination of the above two methods, called hybrid.
Comflex metal hoses with long service life; practical, safe, quick and easy installation. Thanks to their flexible structure, they are safe against vibration and noise.
Comflex have various kinds of flexible metal hose,such as omega type metal hose,U type metal hose,industrial hose,gas hose,braided hose with fittings etc.In addition,we can customize the metallic hose according to your requirements.Comflex provide the highest quality service in the industry to meet all your needs and are committed to providing you with high quality, high standard flexible metal hose.
There are many different types of flexible metal hoses. Are you still worried about how to accurately choose the products you want? To accurately select the metal hose you want, we can follow these steps. Tell us the following information and you can get a precise quote.
SUS 304 Austenite stainless steel is usually referred to as the Japanese name for SS304 or AISI 304 stainless steel.304 stainless steel is a common material of stainless steel, the density of 7.93 g/cm3 and resistance to high temperature 800 ° C.It has good processing performance and high toughness.They are widely used in medical industry and furniture decoration industry and food industry.
Flexible metal hose made with ss304 has good comprehensive performance of corrosion resistance and formability.Stainless steel 304 flexible metal hose is durable in use , good and inexpensive, will bring the best result of use and good economic benefits to you.
ss321 is a stabilized stainless steel which offers as its main advantage an excellent resistance to intergranular corrosion following exposure to temperatures in the chromium carbide precipitation range from 800 to ° F (427 to 816° C).
ss321 also advantageous for high temperature service because of its good mechanical properties. sss321 offers higher creep and stress rupture properties than ss304.Therefore,if your tube needs to work under high temperature conditions, please select the flexible metal hose made by ss321.
Wire braids are made by the a few metal wires that cross each other or a few metal strip that split to be braided by certain order, with specified angle setting in the outer surface of metallic hose, having the effect that strengthens and shielding.Wire braids not only shares the static load of the metallic hose in axial and radial direction, but also ensures the safe and reliable operation of the metallic hose under the condition that the fluid flows along the pipe and produces pulsation effect. At the same time, it also ensures that the corrugated part of the metallic hose is not directly affected by relative friction, impact and other mechanical damages.The strength of the flexible metal braided hose can be increased by ten to dozens of times.The highest shielding capacity can reach 99.95%.
Firstly,the function of the metal hose fittings is to connect the wire braid with the flexible metal hose as a whole.At the same time, the metal hose fittings are the part of the connection between the metal hose and the metal hose or other pipe fittings and equipment.It ensures that the medium works properly in the piping system.The material of the joint are usually the same as the material of the bellows and mesh sleeve, mostly stainless steel.In order to reduce production costs, some of the larger size of the metal hose in the transmission of corrosive medium is not strong or not corrosive, the metal hose fittings can be made of carbon steel;For the connection of metal hose under corrosive medium working condition, if appropriate measures are taken in the design to avoid contact with the medium, carbon steel can also be used.
Comflex ensure to deliver fully tested products at leading market price within promised time frame.Comflex can offer a wide range of Flexible Metal Hose with Russain type Camlock Fittings to Comflex clients. The offered range of product is made from high grade quality raw material to meet the international quality standard.Comflex products are manufactured under the supervision of best quality experts using advanced technology. Comflex products are highly demanded in the market due to their world class quality and available at leading market price.
Comflex quick connecting couplings(camlock coupling) conserve energy and are easy to connect / disconnect without the use of hand tools, for thousands of purposes where products are transfered by pipe or hoses, like Brewing, Chemical, Mining, Fertilizer, Petroleum, Steel Plants, Power Plant and Pneumatic Tools.Especially,we have very special quick release & camlock coupling for liquid gas,such as liquid Amonia, liquid argon,etc..
1.Type:A,B,C,D,E,F,DC,DP.
2.Basic Design:DIN,
3.Test design:API598,
4.Thread standard:NPT,BSPT,BSP,DIN.
5.Material:AISI304,316, aluminium,brass, etc.
6.Available Size:1/2'' , 1 1/4'' , 1 1/2'' , 2'' , 2 1/2'', 3'', 4''
NPT stands for National Pipe Tapered threads, also known as ANSI/ASME B1.20.1 pipe threads. It is a U.S. standard for measuring tapered threads on threaded pipes and fittings. Sometimes referred to as MPT (male pipe threads), NPT threads are not interchangeable with NPS (National Pipe Straight) threads. Unlike straight threads found on a bolt, a taper thread will pull tight, making a closer seal.
1.NPT thread: general sealed cylindrical pipe thread and general sealed conical pipe thread
2.Size range:1/16”-2”
3.Feature:
A pipe end is the description of how the section of pipe ends. There are three main types of pipe ends: beveled, threaded or plain. Understanding pipe ends is important when designing a piping system since it would be inappropriate for the designer to specify a threaded connection for a large diameter pipe or to specify a welded end when connecting to a threaded component.
A bevel is a surface that is not at a right angle (perpendicular) to another surface. The standard angle on a pipe bevel is 37.5° but other non standard angles can be produced. Beveling of pipe or tubing is to prepare the ends for welding. However, it can also be used for deburring the cut ends for safety or aesthetic reasons. Bevel end is abbreviated on drawings as BE.
The beveling process is generally automated. This is because a pipe beveling machine can cut the bevel much faster than hand grinding, flame cutting or turning the pipe on a lathe. Further, the automated process ensures that there is an accurate and consistant pipe bevel each time. The automated process is much safer as operating personnel are not exposed to the same hazards as a person beveling the pipe.
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This is the most commonly used end and is used on pipe, pipe nipples, and swage nipples.
Typically used on pipe 3" and smaller, threaded connections are referred to as screwed pipe. With tapered grooves cut into the ends of a run of pipe, screwed pipe and screwed fittings can easily be assembled without welding or other permanent means of attachment. In the United States, the standard pipe thread is National Pipe Thread (NPT). The reason for this is that as NPT connections are assembled, they become increasingly more difficult for the process to leak. The standard taper for NPT pipe is 3/4" for every foot. Threaded End is abbreviated on drawings as TE.
Threaded fittings have threads that are either male or female. Male threads are cut into the outside of a pipe or fitting, while female threads are cut into the inside of the fitting. As screwed pipe and fittings are assembled, two pieces are pulled together. The distance that is pulled together is called the thread engagement.
A pain end pipe is a pipe that has been cut at 90° perpendicular to the pipe run. The reason pipe would be specified as plain end rather than beveled end is when the pipe will be used in a socket weld connection or for use with a slip-on flange.
Comflex flexible metal hose are sold to countries all over the world, especially in Russia, Ukraine, Australia, Singapore, the United States etc.,which are well received and trusted by Comflex customers.Many customers have established long-term business cooperation with Comflex. We are committed to providing one-stop service to our customers, answering questions online and ensuring that you can purchase the products you want. Are you still waiting for? Now fill in your contact information and your requirement in the form.Send it! We will reply you as soon as possible.
Unless specified, you may be wondering when you need to consider a metal hose versus a rubber or plastic hose for your assembly. One specification that stands out as an indicator for needing a metal hose is temperature. On one side, we have very hot applications, up to °F. On this end of the spectrum, we have two considerations: outside environmental conditions, such as an assembly near a furnace in a steel mill; or, internal process conditions, like combustion gases or hot air for test facilities. Metal hose performs great at elevated temperatures, but be aware, stainless steel’s strength declines gradually as temperatures rise.
On the other hand, you may need to consider a metal hose for very cold (cryogenic) temperatures, -325°F and lower. Stainless steel improves mechanical properties as temperatures drop, even to cryogenic levels. The colder the temperature, the better they get. When thinking about your end connections, remember that carbon steel has an effective temperature range of 0-800°F; outside this range, its properties diminish quickly.
Another property of metal hose is low permeation—zero leak rate. All rubber and plastic hoses will permeate molecules through the tubing over time. Functionally speaking, the metal hose has a zero leak rate.
Vacuum is another condition that could sway your decision between rubber and metal hose. Because of the low permeation, metal hoses can also be uniquely qualified for vacuum-rated applications. If you need to guarantee the highest level of vacuum rating, a metal hose is a great choice! Because of its corrugated design, it also handles full vacuum from a structural perspective.
Because metal hose can be made from the most chemically resistant metals, this can be another consideration point when deciding to choose metal hose. Metal hoses can withstand the most corrosive of environments. Keep in mind: One aspect of chemical resistance is thickness; a thick component has more material to corrode away and will inevitably last longer.
Finally, it’s important to remember that metal hose is not particularly good with abrasion resistance, contrary to what you might think. The braid wires found in metal hose construction are only a few thousandths of an inch thick; if they’re put in an application where abrasion exists, they can quickly abrade and weaken until they eventually fail. In a scenario such as this, another layer of protection is required, such as a plastic spiral wrap or a strip-wound metal guard welded over the top of the assembly.
Metal hoses can also see this type of degradation from the high frequency of vibration in the system itself. The braid can cause abrasion on the crests of the corrugations. You can address an issue such as this by adding a sacrificial bronze braid layer in between the tube and stainless-steel braid; this softer bronze braid acts to protect both the tube and braid from degrading.
Metal hoses can be manufactured with improved bend radius and flexibility. A compressed hose with a high number of corrugations per inch allows for greater flexibility and reduced force to bend.
Keep in mind that a metal hose does not play well with torsion or twisting; this is something that can be avoided by proper installation. Using two wrenches to tighten a swivel nut will keep the hose free from torque. Proper routing is important too. Bending should occur in a single plane, as multi-planar bending creates torsion and decreases the service life of your hose.
The high velocity of the process fluid can be another consideration when looking into metal hoses. When referring to metal hoses, velocity is considered high at 75 ft/s or more. When your velocity goes above 75 ft/s, the media becomes turbulent, and the hose begins to whistle and vibrate. A flow liner of stripwound hose will smooth out the surface the media flows against and reduces turbulence.
At times, customers may require certain testing requirements. In the absence of a customer spec, every metal hose assembly built by a company using NAHAD standards receives an air-under-water test for one minute to look for leaks at the weld.
NAHAD suggestions include:
High-pressure pneumatic testing has been shown to result in fewer false-positive outcomes, meaning anything higher than 75 psi. Some pinhole leaks are so small they don’t register a bubble in one minute at pressures under 75 psi; however, increase the pressure, and bubbles form quicker. You can talk with your manufacturer to decide if this increased level of testing is right for you.
This is another consideration driven by the customer. You must determine if your organization requires certification, as many do not. The most common certification for a metal hose is ASME Section IX, which tells you, as a buyer, that the weld procedure yields an effective weld, and that the welder is qualified to produce that weld. We won’t sugarcoat it: weld certifications are a labyrinth of understanding and interpretation. If you need details, give us a call and we’ll show you how deep the rabbit hole goes.
Weld inspections can also be performed by a certified inspector. Again, this is a customer-driven requirement. Inspections are normally non-destructive and simply visual. Increased levels use aids like liquid die penetrant to inspect the surface of the weld. Other non-destructive tests, like X-ray and ultrasonic, can detect discontinuities in the internal weld. There are other methods that must be discussed at the quoting and design stage but remember: visual inspection is a minimum requirement for all welds.
Metal hose is a great choice when it comes to oxygen applications, especially industrial oxygen; however, certain care must be taken to ensure the hose is clean and free of hydrocarbons prior to use. Oxygen itself is not flammable, but in the presence of a fuel—typically hydrocarbons—it allows those fuels to ignite at lower temperatures and burn hotter. Metal hose is generally safe because the manufacturing process should not introduce fuel onto the surface of the hose.
When it comes to internal cleanliness, cleaning the inside of the hose and then capping the ends after it’s been fabricated can ensure the hose is safe to use. Cleaning methods and degree of cleanliness should be discussed during the quoting and design stage.
Each size and style of hose has a minimum recommended live length, meaning the minimum length of the flexible portion of the hose must be able to flex and hold pressure, generally behaving like a hose. At lengths shorter than the minimum recommended live length, the hose tends to act more like a pipe, with little flexibility; these cannot be guaranteed to perform as expected. Most fabricators will make these short assemblies and simply state the length is shorter than recommended, which could void the warranty.