Metal Products Series
Our company was founded in 2005, at the beginning of the establishment engaged in the design and production work of metal hose, metal pipe fittings and other metal products. In 2007, we began to develop rubber recycling equipment and rubber machinery products, and in 2008 to the market. In 2013, we developed complete equipment for rubber asphalt modification. Our company is located in Wuxi, JiangSu Province, 150 kilometers away from Shanghai, Nanjing, north of the Yangtze River, transportation is very convenient. We mainly engaged in the research and development, production and sales of rubber machinery and metal products.
Why Choose Us
Our Factory
Our company is located in Wuxi, JiangSu Province, 150 kilometers away from Shanghai, Nanjing, north of the Yangtze River, transportation is very convenient. We mainly engaged in the research and development, production and sales of rubber machinery and metal products.
Production Market
Our products have been sold to Southeast Asia, North Asia, Eastern Europe, Australia, America and other markets; Achievements: tire recycling equipment in Malaysia; tire recycling production line in Russia, Ukraine and Turkey; tire recycling rubber asphalt modifier production line in New Zealand , etc
Our Certificate
GB/T19001-2016/ISO9001:2015 QUALITY MANAGEMENT SYSTEM CERTIFICATION.Patent number：ZL 2019 2 1443405.7 ZL 2019 2 1443434.3 ZL 2019 2 1443437.7 ZL 2019 2 1443820.2
After Sale
● Provide guidance information and technical assistance for users to install and debug the products sold free of charge;
● Our company is equipped with a high-quality after-sales service team based on technical personnel, in receiving the feedback of users, in the shortest time to make the satisfactory reply and processing;
● Our product warranty period of one year; After the one-year warranty period, the lifetime maintenance of the products sold is guaranteed;
● Our company regularly visits users to understand the use of products and help solve various problems that may be encountered in the process of use. At the same time to solicit suggestions for quality and technical improvements, in order to better serve users;
A flexible metal hose is a flexible metal line element. There are two basic types of metal hose that differ in their design and application: stripwound hoses and corrugated hoses. A flexible metal hose roughly consists of three parts - inner convoluted hose, braid layer, braid sleeve and end fittings. The hose body is usually made of stainless steel, such as 304, 321 or 316L. The corrugated structure makes the flexure maximize.
Advantages of Flexible Metal Hose
Flexibility
The primary advantage of flexible metal hoses is their flexibility. They can bend and twist without breaking, which makes them ideal for applications where rigid piping would not work. This flexibility also allows for easier installation in tight spaces and around obstacles.
Durability
Flexible metal hoses are made of high-quality metal alloys, which make them strong, durable, and resistant to wear and tear. They can withstand high pressures, extreme temperatures, and corrosive environments, making them suitable for use in harsh conditions.
Corrosion resistance
Flexible metal hoses are resistant to corrosion, which makes them suitable for use in applications where corrosion is a concern. They are commonly used in chemical processing plants, food and beverage industries, and marine applications.
High temperature resistance
Flexible metal hoses can withstand high temperatures, making them suitable for use in high-temperature applications. They are commonly used in steam and hot water applications, as well as in high-temperature air and gas applications.
Corrugated Tubing
The corrugated tubing is the core component of a flexible metal hose. Not only does it comprise the bulk of an assembly, but it also plays a part in key value-added attributes of the assembly, such as corrosion resistance, pressure rating, and flexibility.
Corrosion Resistance
Corrosion resistance is simply a matter of selecting the correct alloy for the media that is being conveyed. For most applications, 321 stainless steel provides sufficient corrosion resistance. If additional chemical resistance is needed, 316 stainless steel can be used, which contains more nickel and other alloying elements to increase chemical resistance. Chlorine transfer applications require the highest degree of corrosion resistance. For chlorine and other highly-critical applications, C276 may be the best choice.
Pressure Rating
The pressure rating that “creates value” for an assembly depends on the application in which the assembly is going to be used. For many standard applications, a hose with a lower pressure rating can be used, whereas more critical applications may demand the use of a hose that can withstand higher pressures.
Flexibility
Flexibility can mean different things to different people. To some, it may refer to a hose’s ability to be bent into a tight radius. To others, it may mean a hose has a high cycle life. Or, it may mean that a hose will bend easily without exerting high spring forces on the surrounding equipment.
For corrugated metal hose, flexibility is expressed by the “minimum dynamic bend radius” (MDBR), which is derived through testing in our in-house lab. Depending on the application, a larger MDBR may be acceptable or a tighter MDBR may be required. If an application requires a tighter MDBR, then a close-pitched hose would provide a valuable solution. Close-pitched hoses feature more corrugations per foot than standard hose, which distributes the bending stresses over more corrugations and allows the hose to be bent more tightly.
Braid
The second component of metal hoses is the braid. Along with hose selection, the braid contributes to an assembly’s ability to withstand high pressures.
There are multiple factors that can contribute to the functionality of the braid, such as the wire diameter, the number of wires per carrier, the number of carriers on the braiding machine and the percentage of braid coverage. The pressure rating of a hose may also be increased by adding additional layers of braid or using braided braid. Proper braid design has a significant effect on the working pressure and cycle life of the hose. Utilizing a braid package with a high-percentage braid coverage that is braided directly onto the hose helps to ensure that the braid is well-secured on the hose, protecting the assembly from potential deformation and ensuring maximum cycle life.
Braid Collars
While only accounting for a small portion of a hose assembly, the braid collars have an important role. Braid collars serve to join the inner corrugated hose and the braid together during the cap welding process, in which a TIG weld joins the hose, braid and braid collar together into the cap weld bead. This cap weld needs to be perfect, as it will be the base for the subsequent attachment weld and is the connection point holding all of the components of the hose together.
Along with helping join the hose components together, the braid collars also serve to protect and isolate the corrugations near the cap weld from any movement. After the cap welding process, these corrugations are now a “heat-affected zone” and are thus unable to functionally cycle with the rest of the hose. The braid collars ensure that any bending stresses are properly distributed over the right corrugations, preserving the cycle life of the assembly.
End-Fittings
The final component added to an assembly is the fittings. There are a lot of options available when it comes to fittings selections, allowing flexible metal hose assemblies to be customized to fit into a variety of applications. Therefore, it is important that the fittings selected fit the needs of the application. Be sure to verify the size, alloy, and pressure requirements of an application before making a definitive fittings selection.
Factors To Consider Before Installing The Flexible Metal Hose
Assessing the application requirements
Before installing the flexible metal hose, it is vital to evaluate the specific requirements of the application. Two crucial factors to consider are pressure and temperature. The hose should be capable of handling the maximum working pressure and pressure peaks within its burst rating. Additionally, it is important to ensure that the temperature remains below average and atmospheric levels, as high temperatures can impact the hose’s performance.
Determining the correct hose size and length
When installing a hose, it is important to determine the appropriate size and length to ensure optimal performance. To determine the suitable hose length, it is recommended to calculate the minimum length necessary to avoid undesirable pressure drops. At the same time, the hose should be long enough to provide flexibility for accommodating changes in pressure, motions, temperature, or displacements of parts. Considering these factors will help ensure a successful installation of the hose.
Choosing the appropriate end fittings
When installing a hose, selecting the right end fittings is crucial and depends on the specific application. Different couplings and fittings are used based on the intended use of the hose. For hydraulic applications, flexible metal hose manufacturers offer a variety of fittings specifically designed for hydraulic hoses. These fittings are suitable for handling hydraulic fluids and ensuring reliable performance. On the other hand, when it comes to air and gas hoses, it is important to choose fittings that are appropriate for pressurised air, gaseous media, and other relevant applications.
Gathering the necessary tools and equipment
Before installing hoses, it is essential to gather the appropriate tools and equipment required for the construction of hoses and tubes. These tools and equipment may come in different materials or combinations thereof. It is crucial to consider the chemical resistance of the hose material during installation, as this can greatly impact its performance and longevity.
Ensuring proper safety measures
When installing a hose, it is crucial to prioritise safety and take appropriate precautions. Ensure that the selected hose does not exhibit any signs of damage. Be cautious and avoid using hoses that show signs of cuts, kinks, or twists, as these can compromise the hose’s integrity and greatly affect its service life and pressure ratings.
Cut the metal hose to the required length
Using a rough cutting tool, the flexible metal hose is cut from the spool at a bit more than the desired length. This hose typically includes both the braided exterior and the corrugated interior. The braided exterior is then removed from the flexible interior hose to separate the two elements and make them easier to work on. The core hose is then cut to the exact measurement required when paired with the end fittings.
Apply the fitted collars to the hose assembly
The interior corrugated hose is then reunited with the braided exterior. The interior hose will be a bit shorter than the exterior hose. Collars are then placed on the outside of the existing assembly. Once they are properly in place, they are crimped together to ensure that the collars do not shift.
Trim the braid
After the collars are holding the braid and the interior hose together, the exterior braid is trimmed back to meet the edges of the collars and the interior hose.
Weld the end fittings to the assembly
At this point, the end fittings can be welded onto the assembly in a way that leaves no gaps for gas or fluids to escape through the weld. After welding the fittings on, the ends are polished to ensure that everything looks seamless.
Test the hose assembly
After the hose is completely outfitted with fittings, the entire assembly is tested for leaks and quality.
Copper expansion joint, also called expansion gap, is a narrow space left between two elements of the building. Such gaps often occur between a concrete screed and a wall or between two walls or floors in different rooms.Copper epansion joints are used at the connections of structural elements made of different materials and having different properties, such as susceptibility to shrinking and expanding under the effect of heat. Examples include areas where a so-called floating floor made of wooden panels interfaces with ceramic tiles. Due to the way the panels are laid, the wood continuously “works” and slightly changes its location. The expansion joint is there to enable that; if we use it, we do not need to worry that our floor will start cracking when affected by stress.
Types of Copper Expansion Joint
Expansion joint
Mainly single expansion joint is designed to absorb axial & small amount of lateral & angular movements of the piping system in which it is installed. A double expansion joint is consist of two or more bellows joined by common connectors
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Universal expansion joint
A universal expansion joint is an assembly containing two bellows connected by a centre pipe and equipped with tie rods. Universal expansion joints are mainly used to absorb any combination of the three basic movements in the piping system. (axial, lateral, angular)
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Pressure balanced expansion joint
A pressure balanced single or universal expansion joint is an assembly designed to absorb axial movement and /or lateral deflection while the pressure thrust is balanced by means of an additional bellows and tie rods. This type of expansion joint can usually be used only where change of direction occurs in the piping system .
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Hinged expansion joint
A hinged expansion joint is an assembly designed to absorb angular rotation in the plane perpendicular to the hinge pins. The hardware consists of two hinged plates 180 ° apart and joined to the end connection. The hinged hardware is designed to absorb the pressure thrust of the expansion joint assembly. A pair of hinged expansion joints shall absorb lateral deflection.
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Gimbal expansion joint
A gimbal expansion joint is an assembly designed to absorb angular movement in any plane. The gimbal hardware consists of two sets of hinges, connected to a common floating gimbal ring, which is designed to absorb the pressure thrust of the expansion joint assembly.
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How to Select the Right Copper Expansion Joint
Location of the Copper Expansion Joint
Pre-planning your piping system will allow you to determine the most ideal placement of your copper expansion joints. Proper placement of copper expansion joints allows movement allowance, easy accessibility, and adequate cooling for your piping system. Moreover, you will be able to determine the idyllic type of copper expansion joints to install.
Media Being Conveyed
Most aspects of design and build for the right copper expansion joint are determined by the liquid or gas being conveyed through the joint. Some copper expansion joints are lined with insulation bolsters or flow liners to protect the joints from abrasive media. It would be wise to consider these types of copper expansion joints if your piping system is meant to convey dirty or abrasive elements.
Materials that have turbulent flow could cause “flutter” in your copper expansion joints if they are made up of the wrong material, which dramatically shortens their lifespan. It is, therefore, critical to make sure your copper expansion joint is made of materials that can support the media you intend to convey.
Temperature
Your piping system's operating temperatureis among the most essential factors to consider when selecting the right copper expansion joint. Your application may require materials to be conveyed at high or low temperatures for optimal results. The temperature requirements will determine the right materials, frame design, and components to use in your copper expansion joints.
Pressure
Piping systems have different pressure requirements depending on the materials being conveyed and their purpose. The pressure requirements determine the copper expansion joint's fabric material and the reinforcements needed. For high pressure piping systems, reinforced rubber copper expansion joints and metal bellows are recommended. Lower pressure systems could use reinforced fiberglass fabric. If not addressed, pressure fluctuations and pulsations could significantly shorten the life of your copper expansion joints.
Installation
It is essential to consider any transportation or installation limitations that are in close proximity to the copper expansion joint. While most copper expansion joints are often shipped fully assembled and ready for installation, larger sizes may need to be shipped in sections or even assembled on-site.
Movements
Some types of copper expansion joints are designed to mitigate the impact of extreme vibration or movements on your piping system during operation. To ensure your copper expansion joints enjoy a long life, it is essential that all the movements expected in the environment are taken into consideration when choosing the type of copper expansion joints being installed.
Piping Scheme
Before addressing the copper expansion joint, ensure that nearby pipes and equipment follow sound piping engineering practices. For the copper expansion joint to function properly, the placement and design of anchors, guides, and supports are crucial. Pipe anchors secure pipes to a fixed location to prevent movement. Pipe guides allow movement in one direction while restricting it in others. Pipe supports transmit the pipe’s weight to the supporting structures.
Placement
The positioning of the copper expansion joint is critical for optimal performance. Proper planning will ensure the joint is placed to allow adequate movement, sufficient ambient cooling, and easy accessibility.
Joint Motion
Copper expansion joints and pump flexible connectors absorb axial, lateral, and angular pipe movement and vibration. It is essential to accurately calculate these movements for the copper expansion joint to ensure longevity. Excessive stress on the joint may lead to premature failure, and some designs are better suited for specific types of movement.
Copper expansion joints used in construction may need to accommodate horizontal, vertical, or multidirectional movements. They should also handle shear movement and provide protection from degradation caused by such interactions.
Media Flow
Design considerations often depend on the air or liquid flowing through the copper expansion joint. Flow liners or insulation can offer additional protection against contaminants or abrasives. The medium's nature is a critical factor in material selection. Condensation inside an copper expansion joint can lead to chemical attacks on the materials. Improper support may cause turbulent flow, fluttering, and reduce the joint's lifespan.
Material Examination
Copper expansion joints should meet material certification standards to ensure compatibility with the pumped fluid. The material selection process is crucial. Choosing inferior materials can result in costly replacements and downtime.
Temperature
Accurate temperature data is vital when assessing application needs. Both internal and external temperatures influence material choice, insulation, and frame design. The copper expansion joint must withstand the system's highest operating pressure at the specified temperature.
Pressure
The design pressure often determines the materials or reinforcements for the copper expansion joint. Reinforced fiberglass fabric and metal bellows can handle higher pressures than reinforced molded rubber. Pulsations or pressure changes, if not managed, can shorten the joint's lifespan. Therefore, it is important to consider pulsing or shock pressure when using connectors at discharge points.
Installation
Many copper expansion joints come pre-assembled and can be easily installed between duct flanges. Larger sizes may need to be shipped in sections and assembled on-site. It is important to account for any obstacles or interferences near the copper expansion joint. Proper positioning and accessibility of mounting flanges are crucial for effective installation and future maintenance or replacement.
Finish Type
Various finishes and materials can be used on copper expansion joints. Consider factors such as color, powder coating, and the use of stainless steel or brass caps when selecting an copper expansion joint.
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