Pipe Displacement Compensation Experts
Corrosion-resistant and pressure-resistant, ensuring long-lasting durability; flexible expansion joints that absorb shock and reduce noise.
Straight-pipe Pressure-balanced Expansion Joint
Categories：
Straight-pipe Pressure-balanced Expansion Joint
Keywords:
Expansion Joints
Email：sales@kdbellows.com
Our Manufacturing Capabilities
Nominal Diameter | 1.5 ''-155'' (DN32-DN4000) |
Nominal Pressure | 0.6/1.0/1.6/2.5/4.0 Mpa |
Compensation | 18–400 mm |
Highest Temperature | -40-450 °C |
Connection Type | Flanges, Pipes |
Flange Materials | Stainless Steel/Carbon Steel/Alloy |
Flange Standards | ANSI/DIN/EN/JIS |
Body Materials | SS304/316L |
Key Specifications of Corrugated Metal Expansion Joints
Nominal Diameter | Number of Corrugations | MPa Pressure Level | Effective area of the Bellows (cm²) | Maximum Outer Diameter (mm) | ||||
0.25 | 0.6 | 1 | 1.6 | 2.5 | ||||
Axial Compensation, mm; N/ram | ||||||||
32 | 8 | 25/21 | 22/26 | 20/26 | 18/63 | 15/98 | 16 | 110 |
40 | 8 | 25/28 | 22/44 | 20/44 | 18/89 | 15/106 | 23 | 130 |
50 | 8 | 25/30 | 22/51 | 20/70 | 18/70 | 15/138 | 37 | 150 |
65 | 8 | 33/28 | 30/35 | 26/44 | 22/55 | 19/68 | 55 | 170 |
80 | 8 | 40/20 | 36/26 | 34/33 | 28/41 | 24/54 | 81 | 200 |
100 | 8 | 45/47 | 45/60 | 40/75 | 35/93 | 29/117 | 121 | 220 |
125 | 6 | 48/38 | 42/47 | 38/59 | 34/74 | 29/92 | 180 | 250 |
150 | 6 | 49/42 | 44/50 | 40/62 | 34/78 | 29/97 | 257 | 250 |
200 | 6 | 52/49 | 46/55 | 42/68 | 38/78 | 34/111 | 479 | 300 |
250 | 6 | 72/30 | 63/34 | 59/42 | 52/45 | 47/55 | 769 | 300 |
300 | 6 | 72/51 | 65/55 | 59/59 | 52/65 | 47/71 | 1105 | 340 |
350 | 6 | 72/58 | 65/62 | 59/67 | 52/74 | 47/81 | 1307 | 340 |
400 | 6 | 75/60 | 72/70 | 65/72 | 60/80 | 55/90 | 1430 | 380 |
FAQ
Causes of insufficient corrugation height, uneven corrugation spacing, and skewed corrugation profile: Insufficient hydraulic forming pressure, mold wear/misalignment, off-center placement of the tube blank, and excessive forming speed
Increase the forming oil pressure, inspect and replace the corrugation mold, correct the center alignment, and form at a slow, constant speed
Causes of wave crest cracking and leakage: Substandard raw material quality (high impurity content, excessive hardness), insufficient wall thickness, severe work hardening, and excessive elongation
Verify material grades (304/316L/S32096), strictly control blank wall thickness, perform annealing before forming, and reduce elongation per wave
Causes of excessive wall thinning and localized scratches or gouges: rough mold surfaces without lubrication, excessive tightness of the forming die clearance, and burrs on the tube blank surface.
Polish the molds, apply a specialized lubricant, and pre-grind the outer surface of the tube blank.
Causes of poor overall concentricity and bending/twisting: Asynchronous multi-point corrugation, tooling positioning errors, and ovality of the tube blank itself.
Synchronized multi-station forming equipment, calibration of fixture reference points, and rounding of cylinder bodies prior to forming
How is product quality ensured?
The company has established a comprehensive quality control system covering the entire process—from raw material procurement and manufacturing to the shipment of finished products. We strictly adhere to relevant national industry standards to ensure that our products are corrosion-resistant, high-pressure-resistant, and resistant to aging, and that they offer excellent sealing performance.
What is the service life of a bellows/expansion joint?
Service life depends on specific operating conditions (such as the medium, temperature, pressure, and frequency of movement). Under normal operating conditions, the product offers excellent resistance to aging and corrosion, ensuring long-term, stable operation.
Can you provide custom-made products?
Yes. We have an experienced R&D team that can provide customized design and technical support during the sales process based on your specific operational requirements.
What are your company’s main products?
We specialize in a range of core products, including metal bellows, expansion joints, flexible metal hoses, and rubber flexible connectors. We offer a comprehensive selection of sizes to meet the needs of various operating conditions.
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Factory Equipment
The company adheres to the business philosophy of “Quality as Our Foundation, Integrity for Long-Term Success, Innovation as Our Driving Force, and Customer First,” and is equipped with advanced production facilities and professional testing instruments.
Company Formation
Registered capital
Annual revenue
Partners
Why Choose KAIDA?
We are committed to building a premium brand in China’s pipeline equipment sector, collaborating with partners across all sectors to achieve mutual success and drive high-quality development in the industry.
Geographical Advantages
At the heart of the Zhengzhou-Luoyang Industrial Corridor, with a comprehensive transportation network, ensuring rapid and efficient response.
Extensive product range
A full range of products, including metal bellows and expansion joints, featuring high-pressure resistance and corrosion resistance, and manufactured in accordance with national quality standards.
ODM/OEM
With a professional R&D team and state-of-the-art testing equipment, we offer custom solutions and technical support.
Worry-Free After-Sales Service
We offer a comprehensive after-sales service system, providing installation guidance and maintenance to ensure the long-term, stable operation of our customers' projects.
Related Products
The company specializes in a range of core products, including metal bellows, expansion joints, flexible metal hoses, and rubber flexible connectors, offering a comprehensive selection of specifications and models.
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If you are interested in our products and services, please contact us or leave us a message, we will serve you wholeheartedly
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Address:
Pipeline Industrial Park, South Section of Yong'an Road, Xicun Town, Gongyi City, Henan Province
