China Expansion Joints Factory - Custom Sizes DN32 to DN4000, Approved Connectors & Flange Options from Reliable Suppliers
It is widely used in chemical engineering, construction, water supply, drainage, petroleum, light and heavy industries, refrigeration, sanitation, water heating, fire protection, electric power and other basic projects. According to different materials, it can be customized into acid, alkali, corrosion, oil, high temperature, radiation, wear resistance, and aging resistant varieties to adapt to various media and environments.
Expansion Joints Feature
- Small volume, light weight, excellent flexibility, convenient installation and maintenance.
- Accommodates transverse displacement, axial displacement, and angular displacement.
- Reduces noise and provides effective shock absorption.
Expansion joints are specially engineered products inserted in a rigid piping system to achieve specific system improvements.
- Absorb movement
- Improved thermal stability
- Relieve system strain due to thermal change, load stress, pumping surges, wear or settling
- Reduce mechanical noise
- Compensate for misalignment
- Eliminate electrolysis between dissimilar metals
Expansion Joints General Data
| Size | ΦD1 | ΦD2 | N-Φd | D | d | Extension | Compression | Horizontal displacement (mm) | Weight(kg) |
|---|---|---|---|---|---|---|---|---|---|
| DN32 | 140 | 100 | 4-18 | 95 | 16 | 6 | 9 | 9 | 3.4 |
| DN40 | 150 | 110 | 4-18 | 95 | 18 | 6 | 10 | 9 | 4 |
| DN50 | 165 | 125 | 4-19 | 105 | 18 | 7 | 10 | 10 | 5.5 |
| DN65 | 185 | 145 | 4-19 | 115 | 20 | 7 | 13 | 11 | 6.7 |
| DN80 | 200 | 160 | 8-19 | 135 | 20 | 8 | 15 | 12 | 7.7 |
| DN100 | 220 | 180 | 8-19 | 150 | 22 | 10 | 19 | 13 | 9.4 |
| DN125 | 250 | 210 | 8-19 | 165 | 24 | 12 | 19 | 13 | 12.7 |
| DN150 | 285 | 240 | 8-23 | 180 | 24 | 12 | 20 | 14 | 15.8 |
| DN200 | 340 | 295 | 12-23 | 210 | 24 | 16 | 25 | 22 | 20 |
| DN250 | 405 | 355 | 12-28 | 230 | 28 | 16 | 25 | 22 | 29.22 |
| DN300 | 460 | 410 | 12-28 | 245 | 28 | 16 | 25 | 22 | 32.8 |
| DN350 | 520 | 470 | 16-28 | 255 | 28 | 16 | 25 | 22 | 41.3 |
| DN400 | 580 | 525 | 16-31 | 255 | 30 | 16 | 25 | 22 | 55.6 |
| DN450 | 640 | 585 | 20-31 | 255 | 30 | 16 | 25 | 22 | 61.8 |
| DN500 | 715 | 650 | 20-34 | 255 | 32 | 16 | 25 | 22 | 69.4 |
| DN600 | 840 | 770 | 20-37 | 260 | 36 | 16 | 25 | 22 | 96.8 |
Chamber Filter Press Plate
Frequently Asked Questions
Our expansion joints are available in standard sizes ranging from DN32 to DN4000, and they can also be customized to fit your specific design requirements.
The rubber bodies are made of high-quality materials including EPDM, NBR, NR, PTFE, and Polarity rubber, depending on the application environment.
They are widely applied in chemical engineering, construction, water supply, drainage, petroleum, refrigeration, sanitation, fire protection, and electric power systems.
They protect piping systems by absorbing movement, improving thermal stability, relieving strain from thermal changes or pumping surges, and reducing mechanical noise and vibration.
Connections include Flange, Threaded, and Union type Rubber Joints, with threads conforming to DIN, BSPT, BSP, NPS, NPT, and Metric standards (such as ISO7/1 and ANSI B1.20.1).
Yes, flanges can be drilled according to BS, DIN, ANSI, JIS standards, or manufactured based on drawings and samples provided by the customer.