Introduction
When designing or maintaining a fire pump system, choosing the right pipeline accessories is crucial for safety and reliability. One key component is the rubber expansion joint. It helps absorb vibration, reduce noise, and compensate for pipe misalignment. In this article, we will explain how to select the most suitable rubber expansion joint for fire pump houses, with examples of DN150 and DN200 sizes.
1. Why Rubber Expansion Joints Are Important in Fire Pump Systems
•Absorb vibration and noise generated by the fire pump.
•Compensate for thermal expansion and misalignment in pipelines.
•Protect pumps and valves from excessive stress.
•Increase service life of the entire system.
2. Key Factors to Consider When Selecting Rubber Expansion Joints
(1) Diameter and Length
•Common fire pump systems use DN150 and DN200 joints.
•Standard face-to-face lengths are 180mm (DN150) and 210mm (DN200).
(2) Working Pressure
•For fire water pipelines, PN16 is the most widely used standard.
•Ensure the joint can withstand test pressure and emergency conditions.
(3) Rubber Material
•EPDM is highly recommended for fire pump houses.
•Resistant to water, heat, and aging.
•Long service life in firefighting applications.
•Other options: NBR (oil resistance), Neoprene (chemical resistance).
(4) Flange Standard
•PN16 carbon steel flanges are the most common choice.
•Check whether your project requires DIN, ANSI, or BS flange drilling.
3. Typical Sizes and Applications
Size Face-to-Face Length Pressure Rating Flange Material Recommended Use
DN150 180 mm PN16 Carbon Steel Fire pump pipeline
DN200 210 mm PN16 Carbon Steel Fire pump pipeline
4. Advantages of Using EPDM Rubber Expansion Joints in Fire Pump Houses
•Excellent resistance to heat and ozone
•Long-term stability in water supply systems
•Cost-effective solution compared with other elastomers
•Ensures reliable operation during emergency firefighting
5. Conclusion
Choosing the right rubber expansion joint for fire pump systems is essential for safety and reliability. For DN150 and DN200 pipelines, EPDM rubber with PN16 carbon steel flanges is the best choice. If you need customized lengths or special materials, we can provide tailored solutions for your project.
📞 Contact us today for more information or a quotation.
•Zhengzhou Hongze Valve Pipeline Co., Ltd.
•🌐 Website: https://hongzepipe.com
•📧 Email: export@hongzepipe.com
•📱 WhatsApp: +86 15838027988