China Manufacturer & Exporter
Rubber Expansion Joints & Dismantling Joints Manufactrer
- WRAS & ISO 9001 Certified Manufacturer
- Self-Owned Factory, Competitive price with high quality
- Standard and Customized both support
- High quality with competitive price
- Experienced Water & HVAC Project Supplier
Our Main Product
Multiple sizes, pressure ratings, flange standards and material options are available.
Send us your pipe size, pressure rating or drawing — we can help you identify the suitable model.
Single Sphere Rubber Expansion Joint
- Size: DN32–DN3200
- Face-to-Face Length: 95–500 mm
- Flange Standard: DIN / ANSI /JIS /EN / ect
- Rubber Material: IIR / CR / EPDM / NR / NBR
- Flange Material: Carbon Steel / Galvanized Steel / SS304 / SS316L
- Customization: Non-standard sizes & parameters available
Double Sphere Rubber Expansion Joint
- Size: DN32–DN1000
- Face-to-Face Length: 165–340 mm
- Flange Standard: ASME / ANSI / EN / DIN / JIS
- Rubber Material: IIR / CR / EPDM / NR / NBR
- Flange Material: Carbon Steel / Galvanized Steel / SS304 / SS316L
- Customization: Non-standard sizes & parameters available
Threaded Rubber Expansion Joint
- Size: DN15–DN80 (1/2"–3")
- Thread Standard: BSP / BSPT / NPT
- Union Material: Malleable Iron / SS304 / SS316
- Rubber Material: EPDM / NBR / CR / NR
- Application: Fan Coil Units / HVAC ; Pumps ; Boiler / Chiller Rooms ; Water Supply / Utility Water ; Compressed Air ; Valves / Meters / Small Equipment
Dismantling Joint
- Size: DN65–DN3200
- Pressure: PN6 / PN10
- Flange Standard: ANSI / EN / DIN / JIS / GB
- Flange Standard: ANSI / EN / DIN / JIS / GB
- Body Material: Ductile Iron / Carbon Steel / Cast Steel
- Installation Length: 400–840 mm
- Customization: Length, flange drilling & material available
Flexible Metal Hose
- Size: DN15–DN400
- Working Pressure: According to size & configuration
- Connection: Flanged / Threaded / Welded
- Hose Material: SS304 / SS316L
- Braid: Single / Double Stainless Steel Braid
- Flange Standard: ANSI / EN / DIN / JIS
- Customization: Length, fittings & pressure rating available
Metal Expansion Joint
- Size: DN32–DN1000
- Pressure: 0.25–2.5 MPa
- Connection: Flanged / Welded
- Material: SS304 / SS3016 / SS321
- Flange Standard: ANSI / EN / DIN / JIS
- Design Temperature: -20°C to +400°C
- Customization: Length, pressure & movement available
About Longsheng Company
Manufacturer of Pipeline Expansion & Connection Solutions
Hengzhong specializes in manufacturing rubber expansion joints, dismantling joints, metal expansion joints and flexible metal hoses for water supply, HVAC and industrial piping systems.
We manufacture according to different project requirements, including international flange standards, sizes, materials, pressure ratings and customized dimensions. Send us your specifications or drawings, and our team can help confirm the suitable product before quotation.
- 20 Years Manufacturing Experience
- Strict Quality Control
- International Certifications
- Factory Direct Sales
- Customization Service
- Fast Delivery
Look Inside Our Factory
See how we manufacture and inspect rubber expansion joints and other flexible piping products, from production and assembly to final quality control.
- Production & Forming
- Assembly & Finishing
- Product Inspection
- Packing & Shipment
Our Advantage
Your Reliable Water Supply Pipeline Partner
Factory Direct Supply, Competitive Pricing
With years of experience in pipeline fitting manufacturing, Longsheng operates its own production facility and handles key manufacturing processes in-house.
By supplying directly from the factory, we reduce unnecessary distribution costs and keep pricing practical and competitive. Continuous improvements in production efficiency and cost control also help us offer better value for long-term customers.
- Factory Direct Supply
- In-House Manufacturing
- Competitive & Practical Pricing
Standardized Production, Consistent Quality
Our products are manufactured according to applicable industry standards, with standardized production procedures and final inspection before shipment.
From material preparation and machining to assembly and inspection, key processes are controlled to maintain consistent dimensions, workmanship and product quality. Installation instructions and technical information can also be provided when required.
- Production to Industry Standards
- Standardized Process Control
- Pre-Shipment Inspection
Ready Stock & Custom Production
We manufacture a wide range of pipeline connection and expansion products in both standard and customized configurations.
Common models and sizes are kept in stock when available for faster shipment. For non-standard requirements, we can manufacture according to your size, material, pressure rating, flange standard, length or drawing.
- Stock Available for Common Models
- Custom Sizes & Specifications
- Flexible Production for Project Orders
Practical After-Sales Support
We provide product documentation, installation guidance and technical support before and after delivery.
For international orders, if a verified manufacturing defect occurs, we will work with the customer to provide a practical solution, which may include replacement, compensation or another mutually agreed arrangement.
Our goal is simple: problems should be handled clearly and responsibly, without unnecessary delay.
- Technical & Installation Support
- Clear Quality Issue Handling
- Replacement or Compensation for Verified Manufacturing Defects
Application of Our Product
Your Reliable Water Supply Pipeline Partner
Water Supply & Treatment
Widely used in water supply, drainage and water treatment pipelines to absorb vibration and movement around pumps, valves and other piping equipment.
HVAC & Chilled Water Systems
Commonly installed in HVAC, cooling water and chilled water systems to reduce vibration from pumps, chillers and other mechanical equipment.
Pumps & Equipment Connections
Used at pump inlets and outlets to help isolate vibration, compensate for pipe movement and reduce stress transmitted to connected equipment.
Municipal & Utility Pipelines
Suitable for waterworks, pumping stations and utility piping systems, especially around valves, pumps and large-diameter pipeline connections.
Chemical & Process Piping
Used in industrial process pipelines carrying water, chemicals and other media where flexible connections and movement compensation are required.
Power & High-Temperature Systems
Metal expansion joints and flexible hoses are commonly used in steam, hot water, exhaust and other high-temperature industrial piping systems.
Hello, I’m Yanping from Gongyi Longsheng Pipeline Equipment Co., Ltd.. Over the past 20 years, we have continuously collaborated with rubber expansiont joint，Dismantling Joint, Flexible Metal Hose, Metal Expansion Joint, and more. If you have any questions,please feel free to contact us.
Our Certification
Your Reliable Water Supply Pipeline Partner
Need a Reliable Supplier for Your Piping Project?
We manufacture and supply rubber expansion joints, dismantling joints, flexible metal hoses and metal expansion joints for industrial piping systems.
Whether you need products for water treatment, HVAC, pumps, power plants or industrial piping, send us your requirements and we’ll help you find the right solution.
Contact Now
Send us the product type, size, pressure, connection standard, quantity or drawings. Our team will review your requirements and get back to you with a suitable solution and quotation.