Product Description

DN50-DN300 cast iron pipe coupling and clamps for BS EN 877 drainage sytsem 

1. our products are made strictly according to EN877 standard.
2. size range from DN50 to DN300, with 3m/pc.
3. painting: inside epoxy paint in color yellow with thickness above 120 micron, outside paint in color red with thickness above 60 micron. If you have special requirement, please contact with us, as we could also make the painting according to your requirement.
4. length/pc: 3m
5. delivery time: 7-15 days, depend on your quantity.
6. application: used for waste water/rain water/ventilation.
7. advantage: avoid pollution, noise resistant.
8. payment term: T/T, L/C, or D/P.
9. production capacity: 2000tons/ month
10. we could do the third party inspection at famous organizations such as SGS, BV, etc.
11. by now we have shipped our cast iron pipes to many countries such as Germany,Italy,UK,Hongkong,Russia,Turkey,Sweden,Norway,Singapore,the Middle East,etc.


DN External diameter DE(mm) Wall thickness(mm) Unit weight Length
Nominal value Tolerance Nominal value Minimum value kg/pc (mm)
40 48 +2
3.0 2.5 12.70 3000+/-20
50 58 3.5 3.0 13.00
70 78 3.5 3.0 17.70
75/80 83 3.5 3.0 18.90
100 110 3.5 3.0 25.20
125 135 +2
4.0 3.5 35.40
150 160 4.0 3.5 42.20
200 210 +2.5
5.0 4.0 69.30
250 274 5.5 4.5 99.80
300 326 6.0 5.0 129.70

If any inquiry , Please feel free  to contact with me 

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clamp coupling

How do Clamp Couplings Contribute to Reducing Backlash and Resonance in Rotating Machinery?

Clamp couplings play a crucial role in reducing backlash and resonance in rotating machinery, enhancing the overall performance and reliability of the system. Here’s how they achieve this:

1. Backlash Reduction:

Backlash is the play or clearance between mating components in a mechanical system. In rotating machinery, backlash can lead to lost motion, reduced precision, and inefficiencies. Clamp couplings offer several features that help minimize backlash:

  • Zero-Backlash Design: Some clamp couplings are designed with a split hub and a clamping mechanism that ensures a tight fit around the shafts. This zero-backlash design eliminates any clearance between the coupling and the shafts, reducing or even eliminating backlash.
  • High Clamping Force: Clamp couplings exert a strong clamping force on the shafts, ensuring a secure and rigid connection. This prevents any relative movement between the coupling and the shafts, further reducing backlash.

2. Resonance Damping:

Resonance occurs when the natural frequency of a rotating system matches the frequency of external forces or disturbances. This can lead to excessive vibrations and potential damage to the machinery. Clamp couplings can help dampen resonance in the following ways:

  • Material Selection: High-quality materials like stainless steel or aluminum alloy are commonly used in clamp couplings. These materials possess excellent damping properties, dissipating vibrations and minimizing resonance effects.
  • Precision Machining: Clamp couplings are precisely machined to maintain balance and reduce vibration during operation. Balanced couplings minimize the likelihood of resonant frequencies being excited, contributing to a smoother operation.
  • Torsional Stiffness: Clamp couplings offer controlled torsional stiffness, which helps prevent the buildup of excessive vibration amplitudes and reduces resonance occurrences.

3. Misalignment Compensation:

Another factor contributing to backlash and resonance is misalignment between shafts. Clamp couplings can accommodate a certain degree of angular, parallel, and axial misalignments, reducing the impact of misalignment-induced backlash and vibrations.

Overall, clamp couplings provide a secure and precise connection between shafts, minimizing backlash and resonance in rotating machinery. By choosing the appropriate clamp coupling based on the specific requirements of the application, engineers can optimize the performance and efficiency of the rotating system.

clamp coupling

Real-World Case Studies of Clamp Couplings in Engineering Projects

Clamp couplings have been widely used in various engineering projects, showcasing their effectiveness and reliability. Here are some real-world case studies:

  1. Wind Turbine Applications: In the renewable energy sector, wind turbines require efficient power transmission between the rotor and generator. Clamp couplings have been successfully used to connect the shafts, allowing for easy installation, alignment, and maintenance. Their ability to handle high torque and misalignment ensures reliable performance even in harsh environmental conditions.
  2. Industrial Machinery: In heavy machinery and industrial equipment, clamp couplings have proven to be a preferred choice for connecting rotating shafts. A case study involving a large-scale conveyor system in a mining operation demonstrated that clamp couplings provided excellent torque transmission and allowed for quick and straightforward replacement during maintenance.
  3. Marine Propulsion Systems: Clamp couplings are widely used in marine propulsion systems for boats and ships. A case study involving a commercial vessel showed that stainless steel clamp couplings significantly reduced maintenance downtime due to their corrosion resistance and ability to handle dynamic loads, ensuring smooth and reliable operation.
  4. Aerospace Applications: In the aerospace industry, clamp couplings have been employed in critical components such as flight control systems and engine assemblies. A case study involving an aircraft engine demonstrated that clamp couplings provided precise and robust shaft connections, contributing to the overall performance and safety of the aircraft.
  5. Automotive Engineering: In automotive engineering, clamp couplings are used in various drivetrain components. A case study involving an electric vehicle showcased that clamp couplings allowed for compact and lightweight designs, minimizing power losses and enhancing energy efficiency.

Conclusion: These case studies highlight the versatility and reliability of clamp couplings in diverse engineering projects. Whether in renewable energy, heavy machinery, marine, aerospace, or automotive applications, clamp couplings have proven to be an effective solution for connecting rotating shafts, providing efficient power transmission, and reducing maintenance downtime.

clamp coupling

Industry Standards and Certifications for Clamp Couplings

There are several industry standards and certifications that may apply to clamp couplings, depending on their design, materials, and intended applications. These standards ensure that the clamp couplings meet specific requirements and quality benchmarks, providing confidence in their performance and reliability.

Some of the commonly recognized standards and certifications for clamp couplings include:

  • ISO 9001: This is a quality management system standard that sets requirements for the design, development, production, and service of products. Manufacturers of clamp couplings may obtain ISO 9001 certification to demonstrate their commitment to quality and continuous improvement.
  • ASME B29.1: This standard is specific to roller chain drives and includes guidelines for chain coupling dimensions and interchangeability.
  • AGMA 9002-C16: This standard, developed by the American Gear Manufacturers Association, provides guidelines for inspection practices of flexible couplings, which may include clamp couplings.
  • API 671: This standard is specific to couplings used in petroleum, chemical, and gas industry services. It sets requirements for special-purpose couplings, such as those used in compressors and pumps.
  • DNV GL Type Approval: The Det Norske Veritas Germanischer Lloyd (DNV GL) provides type approval certification for couplings used in maritime and offshore applications. This certification ensures that the coupling meets specific quality and safety standards for marine use.
  • ATEX: For couplings used in explosive atmospheres, the ATEX directive sets requirements to prevent ignition sources and ensure safety. ATEX compliance may be necessary in certain industrial settings.

It’s important to note that not all clamp couplings require certification under these standards, as the applicability depends on the specific industry and use case. Additionally, some manufacturers may adhere to their own internal quality control measures without seeking external certifications.

When selecting clamp couplings for particular applications, it’s essential to consider whether specific industry standards or certifications are necessary. Consulting with suppliers or coupling manufacturers can help ensure that the chosen clamp couplings meet the required quality and safety standards for their intended use.

China best DN50-DN300 Cast Iron Pipe Coupling and Clamps for BS En 877 Drainage Sytsem  China best DN50-DN300 Cast Iron Pipe Coupling and Clamps for BS En 877 Drainage Sytsem
editor by CX 2024-02-05