Rubber Expansion Joint

Rubber expansion joints are engineered to enhance the safety and integrity of your plant's mechanical equipment. These ductile iron joints are designed to be inserted into rigid piping systems, offering a reliable solution for various industrial applications.

Our Rubber Expansion Joint is a multi-layer elastomeric connector designed to absorb axial, lateral and angular movements, damp vibration and protect piping equipment. Engineered for long service life, it supports a wide range of fluids and operating conditions through selectable rubber compounds and reinforcement options.

Rubber expansion joints features:

◆ Absorbs Movement: Efficiently handles thermal changes, load stress, and pumping surges.

◆ Improves Thermal Stability: Maintains system equilibrium under varying temperature conditions.

◆ Reduces Mechanical Noise: Minimizes noise pollution in industrial settings.

◆ Compensates for Misalignment: Adjusts for installation errors or structural shifts.

◆ Eliminates Electrolysis: Prevents corrosion between dissimilar metals.

◆ Improve the flow circulation and avoid the bellow deformation. 

◆ Absorbs thermal expansion and shock. 

All rubber flexible joints from Shanxi Solid Industrial exceed safety ratings in pressure and movement, ensuring they meet or surpass product specifications.

Key Benefits

• ·   Absorbs thermal expansion, contraction and pipe misalignment.

• ·   Reduces vibration and noise from pumps, fans and compressors.

• ·   Lowers reaction forces on anchors and equipment compared with metallic alternatives.

• ·   Lightweight and easy to install — reduces labor and handling costs.

• ·   Multiple compound choices for chemical compatibility and temperature range.

• ·   Custom flange patterns and reinforcement for pressure or vacuum service.

Rubber expansion joints applications:

The joint could primarily reduce the quiver and the noise of the piping system; completely solve the different piping problems as displacement of joint, axial flex and etc.

HVAC | Water & wastewater | Pump discharge & suction lines | Chemical process lines | Marine systems | Power plants | Food & beverage (food-grade options)

Standard Materials & Options

• ◆ Body elastomers: EPDM, Neoprene (CR), Nitrile/Buna-N (NBR), Silicone, Natural Rubber.

• ◆ Reinforcement: Multi-ply fabric, steel tension rings, internal sleeves.

• ◆ Flanges: ANSI (ASME), DIN, JIS or custom drilling patterns.

• ◆ Optional features: Restrained/anchored versions, internal PTFE sleeve, external protective cover, anti-static/earthing wire, fire-resistant cover, food-grade compounds.

Standard Sizes & Ratings

• ◆ Nominal sizes: DN 15 (½") – DN 3000 (custom sizes available).

• ◆ Pressure ratings: Up to industry-standard working pressures (specify operating pressure when ordering).

• ◆ Temperature range: Compound dependent (please specify min/max operating temperatures).

For a precise match we will confirm allowable pressure/temperature for the selected rubber compound and reinforcement.

Why Choose SolidJoints

• Decades of experience in flexible joint manufacturing and quality control.

• Flexible in-house production — fast customization for odd sizes, special materials and custom flange patterns.

• Comprehensive testing and a focus on long-term performance — we optimize compound selection and reinforcement for each application.

• Global export experience and responsive technical support to help you select, install and maintain the correct joint.

Structure: bellows + flat welding flanges. 

Main material: Compensates converting misalignment 

Bellows: stainless steel 304. 

Flanges: stainless steel 304 or carbon steel. Compensates for exhaust converter misalignment.

Packing: Carton + pallet.