304 stainless steel metal corrugated pipe
DN40-DN1000
Metal bellows are flexible pipeline compensators mainly made of thin stainless steel corrugated cylinders, equipped with flanges, pipe ends, limit tie rods and other components. They absorb axial, lateral and angular displacement caused by pipeline thermal expansion and contraction, reduce vibration and noise, and offset installation errors. Featuring high temperature resistance, pressure resistance and corrosion resistance, they are widely used in heating, chemical, water supply & drainage, pump & valve, flue and vacuum piping systems.
Delivery
EXW
minimum order
10 pieces
Supply Ability
100pieces / Day
Country of Origin
CHINA
Stock Time
14Day
Quantity:
US $10.00 - US $1000.00
/ pieces
1. Product Overview, Structure & Materials
Metal bellows, also known as metal expansion joints or corrugated pipeline compensators, are indispensable flexible core components for all types of industrial pipeline systems. Designed to solve the inherent defects of rigid pipe operation, they effectively cope with pipeline thermal expansion and contraction, mechanical vibration, foundation settlement, construction installation errors and structural stress concentration, balancing pipeline rigidity and flexible deformation performance to ensure long-term stable operation of fluid transmission systems.
The product is mainly made of high-quality stainless steel materials such as 304, 316L and 321, with customized Inconel alloy and titanium alloy available for ultra-high temperature, high pressure and strong corrosion extreme working conditions. The corrugated tube body is integrally formed by precision hydraulic forming, mechanical stamping or multi-layer composite welding process, with stable structural performance and high overall uniformity. A complete set of standard metal bellows is composed of corrugated body, straight pipe section, connecting flange, limit tie rod, inner flow guide sleeve, outer protective cover and reinforcing sealing structure. Every component is precisely matched to enhance overall pressure resistance, structural stability and operation safety.
In terms of waveform design, mainstream U-type, C-type, S-type and V-type corrugations are adopted. U-shaped corrugations are the most widely used for their uniform stress distribution, large compensation stroke and excellent fatigue resistance; special waveforms and multi-layer structures are customized for high-pressure, large-displacement and high-fatigue working scenarios. Core parameters including wave height, wave pitch and wall thickness are scientifically designed to balance the flexibility, tensile and compression resistance, and service life of the bellows.
2. Working Principle & Core Functional Advantages
The core working principle of metal bellows is utilizing the excellent elastic deformation performance of the periodic corrugated structure to realize three-dimensional displacement compensation. In the operation of rigid pipeline systems, temperature changes cause thermal expansion and cold contraction of pipes; the operation of water pumps, fans and compressors produces continuous mechanical vibration; uneven foundation settlement and on-site installation deviations will lead to axial stretching, radial offset and angular deflection of pipelines. Without flexible buffering, accumulated structural stress will easily cause weld cracking, pipeline rupture, flange loosening and medium leakage, and even damage supporting precision equipment.
Metal bellows can freely elastically deform in axial, lateral and angular directions, fully absorbing various pipeline displacements and releasing internal concentrated stress. Besides basic displacement compensation, they have excellent vibration isolation and noise reduction capabilities, which can effectively cut off the vibration transmission path between power equipment and pipelines, weaken pipeline resonance and high-frequency noise, and protect valves, instruments and pump body equipment from vibration damage. The built-in flow guide sleeve can stabilize medium flow rate, reduce turbulent flow and fluid impact, and further optimize the safety and smoothness of pipeline transmission.
Compared with traditional rubber joints and rigid pipe fittings, metal bellows have more superior comprehensive performance. They adapt to ultra-low temperature cryogenic environments to 800°C high-temperature working conditions, and withstand low pressure to ultra-high industrial pressure. Featuring acid and alkali corrosion resistance, oxidation resistance and strong fatigue resistance, they will not age, swell or deform after long-term service in harsh chemical, high-temperature and oil medium environments, with stable sealing performance and zero leakage risk.
3. Product Classification & Installation Characteristics
According to structural design and functional positioning, metal bellows cover a complete range of industrial types, including axial internal and external pressure bellows, single/double tie rod expansion joints, hinged angular compensators, universal lateral displacement bellows, direct buried underground bellows, large-diameter flue and air duct bellows, vacuum thin-wall bellows and special high-temperature high-pressure composite bellows. Each type is professionally customized for differentiated working conditions, fully adapting to municipal water supply and drainage, heating hot water pipelines, high-pressure steam thermal pipelines, chemical process pipelines, vacuum negative pressure systems and high-temperature flue gas conveying pipelines.
In terms of installation and application, metal bellows have strong tolerance to construction errors, which can effectively compensate for on-site installation misalignment, height difference and angle deviation, reduce construction difficulty and improve pipeline installation qualification rate. Equipped with standard limit tie rods, the products can accurately control the maximum expansion and contraction stroke, avoid equipment damage caused by excessive stretching or compression, and realize double safety protection. The direct-buried type adopts special anti-corrosion and pressure-resistant outer structure, which can adapt to complex underground soil pressure and humid environments, with strong environmental adaptability.
4. Application Scenarios & Industrial Value
With reliable performance, diverse specifications and strong working condition adaptability, metal bellows are widely used in core industries such as municipal water supply and drainage, urban central heating, thermal power generation, petrochemical and chemical engineering, natural gas and oil transmission, HVAC ventilation and smoke exhaust, metallurgical mining, pharmaceutical food processing, environmental protection sewage treatment, vacuum equipment supporting and aerospace precision pipeline systems. They are essential standard supporting accessories for industrial pipeline systems.
In industrial engineering, metal bellows perfectly solve various operation pain points of rigid pipelines through flexible compensation, vibration isolation and stress release. With stable material performance, long service life and low maintenance cost, they provide a solid and reliable technical guarantee for the safe, efficient and long-term stable operation of global fluid transmission and pipeline engineering systems, and are irreplaceable core flexible connecting and compensating components in modern industrial pipelines.
a) How can I get more details about your products?
You can send an email to our email address. We will provide catalogue and pictures of our products for your reference.We can also supply pipe fittings, bolt and nut, gaskets etc. We aim to be your piping system solution provider.
b) How can I get some samples?
If you need, we will offer you samples for free, but new customers are expected to pay express charge.
c) Do you provide customized parts?
Yes, you can give us drawings and we will manufacture accordingly.
d) To which country have you supplied your products?
We have supplied to Thailand, China Taiwan, Vietnam, India, South Africa, Sudan, Peru , Brazil, Trinidad and Tobago, Kuwait, Qatar, Sri Lanka, Pakistan, Romania, France, Spain, Germany, Belgium, Ukraine etc. (Figures here only include our customers in latest 5 years.).
e) I can't see the goods or touch the goods, how can I deal with the risk involved?
Our quality management system conforms to the requirement of ISO 9001:2015 verified by DNV. We are absolutely worth your trust. We can accept trial order to enhance mutual trust.
You can send an email to our email address. We will provide catalogue and pictures of our products for your reference.We can also supply pipe fittings, bolt and nut, gaskets etc. We aim to be your piping system solution provider.
b) How can I get some samples?
If you need, we will offer you samples for free, but new customers are expected to pay express charge.
c) Do you provide customized parts?
Yes, you can give us drawings and we will manufacture accordingly.
d) To which country have you supplied your products?
We have supplied to Thailand, China Taiwan, Vietnam, India, South Africa, Sudan, Peru , Brazil, Trinidad and Tobago, Kuwait, Qatar, Sri Lanka, Pakistan, Romania, France, Spain, Germany, Belgium, Ukraine etc. (Figures here only include our customers in latest 5 years.).
e) I can't see the goods or touch the goods, how can I deal with the risk involved?
Our quality management system conforms to the requirement of ISO 9001:2015 verified by DNV. We are absolutely worth your trust. We can accept trial order to enhance mutual trust.