Flexible metal hose

What is the flexible metal hose?



braided hose with different fittings

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.

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.

Corrugation Design

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’.

high quality flexible metal hose

--------Usage Field

Flexible metal hose is widely used in energy, petroleum, petrochemical, machinery, refrigeration, construction, hydropower, nuclear power, cement, paper, medicine, transportation, mining, metallurgy, urban central heating, shipbuilding, city gas, natural gas pipeline construction, Central air conditioning, aerospace and other industries.

Flexible metal hose offer a wide range of solutions in different applications:

- To take up misalignment or thermal expansion of the pipe system;
- To absorb vibrations or to facilitate repeating machine movements
- High temperature fluids to be safely conveyed through a system under high pressure
- When a system is exposed to high external heat, corrosion or rough handling

--------Comflex Flexible Metal Hose

Comflex Industrial Co.,Ltd flexible metal hose manufacturing co

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.

Product Advantage

Good flexibility, no clogging and blunt

Good corrosion resistance and high temperature resistance

Light in weight and good in caliber

Resistance to fire, moisture, and penetration.

Anti-rat bite, good abrasion resistance, to avoid internal wire abrasion

Resistance to bending, tension and lateral pressure

Absorbs vibration and noise from pumps, compressors, engines etc.

Corrects problems of misalignment.

A flexible and quick alternative for rigid piping in difficult locations.

Comflex Industrial Co.,Ltd omega type flexible metal hose

Ω type metal hose

Size: Dn15-150mm
Thickness: 0.15-0.6mm
Pitch Distance: 3-50mm
Material of Hose: SUS304,321,316L
Braid Material: SUS304
Fittings: BSP, NPT,*BSPT Taper Male,Flange
Connection Type: Flange or Thread or Welded
Length: According to Buyers’ Requirement
Application: Steam, Chemical,Gas,Industrial,etc...


Comflex Industrial Co.,Ltd flexible metal gas hose

Flexible metal Gas hose

Hose Type: Annular/Corrugated
Length: Unlimited
Working Temperature: -40~70
Cover:PE cover or not
Sample: It Is Avaliable as Per Your Request.


Comflex Industrial Co.,Ltd flexible metal industrial hose

Flexible Metal Industrial hose

Size: Dn100-600mm
Thickness: 0.15-0.6mm
Pitch Distance: 3-50mm
Material of Hose: SUS304,321,316L
Braid Material: SUS304
Fittings: Flange
Corrugated Type: Annular
Length: According to Buyers’ Requirement
Application: Steam, Chemical,Industrial,etc...


Comflex Industrial Co.,Ltd flexible metal braided hose with fittings

Flexible metal braided hose with fittings

Size: Dn8-400mm
Thickness: 0.15-0.6mm
Pitch Distance: 3-50mm
Material of Hose: SUS304,321,316L
Braid Material: SUS304
Fittings: BSP, NPT,*BSPT Taper Male,Flange
Connection Type: Flange or Thread or Welded
Corrugated Type: Annular or Helical
Length: According to Buyers’ Requirement
Application: Steam, Chemical,Gas,Industrial,etc...


How to select the correct 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.

Flexible Metal Hose Size Range
Flexible Metal Hose Material
Do you need wire braids?

Do you need Metal Hose Fittings?
Do you need Pipe End?

--------Flexible Metal Hose Size Range

Comflex Industrial Co.,Ltd flexible metal hose with fittings

Comflex Industrial Co.,Ltd braided hose with flange

The size of flexible metal hose that we can make is from DN6mm till DN600mm. Here is the specific size range of different types of corrugated metal hose  for your reference.

  • Omega type flexible metal hose:DN15-150mm
  • Flexible metal industrial hose:100-600mm
  • Flexible metal gas hose:15-32mm
  • Flexible metal Braided hose with fittings:9-400mm

If you have special parameter requirement,just tell us.If no, we will quote according to our standard.

--------Flexible Metal Hose Material


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 1500° 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.


ss316L  is an extra-low carbon version of the 316 steel alloy. SS316L has good corrosion resistance and is resistant to marine and aggressive industrial atmospheres.The lower carbon content in 316L minimizes deleterious carbide precipitation as a result of welding.

316L stainless steel has a maximum carbon content of 0.03. If it cannot be annealed after welding and the corrosion resistance is extremely high, Stainless steel flexible metal hose will be your best choice.

--------Do you need Wire Braids?

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%.

We make stainless steel tubular shielded braid manufactured with type 304 soft drawn Stainless Steel. They are widely used on flexible metal hoses,both for corrugated and interlock hoses.We supply double layer or single layer braids. The braids are used where highter temperature or greater mechanical strength is needed.

The size range of the hose that we can braid is DN6-600mm.Normal metal hoses use only one layer of mesh sleeves; for special applications, they are also woven in two or three layers, depending on the specific working pressure. Depending on the size of the bellows and the requirements for its use, it is usually made of wire with a diameter of 0.3 to 0.5 mm. The wire is 5~18 per strand, one strip per ingot. The steel wire mesh sleeves produced are mostly 24, 36, 48, and 64 strands, and the bellows with extra large diameters, as well as 96, 120, and 144 strands. The main weaving parameters of the net sleeve are in addition to the number of strands (wire), the diameter of the wire, the number of ingots and the thickness of the strip, as well as the coverage area, the weaving distance, the weaving angle, and the like. They are all important basis for determining the performance of metal hoses.

--------Do you need Metal Hose Fittings?

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.

Gas hose fitting

1.Material AISI 304,  Nickled carbon steel
2.Size: 1/2'' , 3/4‘’ etc
4.Application: the water system, interior piping system, kitchen equipment and so on.

  • high corrosion resistance
  • high temperature resistance
  • cryogenic temperature resistance
  • perfect mechanical property


Russain type camlock

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.

Russain type camlock

Quick camlock

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..

2.Basic Design:DIN2828,
3.Test design:API598,
4.Thread standard:NPT,BSPT,BSP,DIN2999.
5.Material:AISI304,316, aluminium,brass, etc.
6.Available Size:1/2'' , 1 1/4'' , 1 1/2'' ,  2'' , 2 1/2'', 3'', 4''


1.Material:ss304,ss321,ss316 or carbon steel
2.Standard of flange: EN,ASM,GB. ISO,Japan, Australia
3.Nominal Pressure(PN/MPa)
4.Installation:Floating or Fixed
5.Shape:Welding neck flange ,Slip-on flange ,Socket-welding flange ,Threaded flange ,Lapped joint flange ,Reducing flange ,Blind flange ,Flange scaling face ,Flat face ,Raised face ,Male and,female face ,Female face,Male face ,Ring joint face ,Tongue and groove face ,Tongue face ,Groove face



NPT fitting

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”

  • Angle between taper and center axis of pipe is 1° 47’ 24” (1.7800°)
  • Truncation of roots and crests are flat
  • 60° thread angle
  • Pitch is measured in threads per inch (TPI)

hose with fittings

BSP Fitting

BSP(British Standard Pipe) according to the shape can be devided into:BSPP(British Standard Pipe Parallel)and BSPT(British Standard Pipe Taper)。

BSPT (British Standard Pipe Thread) is similar to NPT except for one important difference. The angle across the flanks of threads (if you sliced the fitting in half long-ways and measured the angle from root to crest to root) is 55 degrees instead of 60 degrees as it is for NPT. This is a popular fitting in China and Japan but is very rarely used in North America unless the equipment to which it is attached was imported.

BSPP (British Standard Parallel Pipe) is most popular in the UK, Europe, Asia, Australia, New Zealand and South Africa. It is a parallel thread fitting that uses a bonded seal ring to do the sealing. This bonded ring seal is sandwiched in-between a shoulder on the male fitting and the face of the female fitting and is squeezed in place.


--------Do you need Pipe End?


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.

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.


According to the following steps above,the last step is telling us the quantity of the flexible metal hose that you need.After that,we will arrange production, packaging and transportation for you.Please FEEL FREE TO CONTACT US if you have any plan to buy the welcomed and quality flexible metal hose at competitive price.

Comflex Industrial Co.,Ltd flexible hose with flang connection

Professional Flexible Metal Hose Manufacturing Co

Comflex Industrial Co.,Ltd is a professional metalic hose manufacturing Co. In Comflex we have a lot of necessary manufacture facility for the high-quality metallic hose.

Mechanical metalic hose making machine: DN6-DN40

Spiral metalic hose machine: DN8-DN20/DN25-50

Tube welding machine: DN32-DN350

Hydraulic metalic hose making machine: DN32-DN350

Elastomer metalic hose making machine: DN15-DN150

Wire braiding machine: 24-156 spindle

Comflex Industrial Co.,Ltd Customer Base

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.


    braided hose with different fittings

    Comflex Industrial Co., Ltd is a leading manufacturer of flex-related products in China.Comflex is very professional in making all kinds of flex-related products, such as flexible metal hoses, expansion joints, braidings, hose fittings,etc.for 25 years.