30MC Series Bellows & Expansion Joints
The Flex-Weld 30MC Series General-Purpose / Low-Pressure Expansion Joints are engineered for performance and versatility in piping systems sized 4” through 42”. Constructed with multi-ply stainless steel bellows rated for 30,000+ cycles, the 30MC Series provides reliable movement absorption and vibration isolation across a wide range of industrial and mechanical applications.
Available in flanged, weld, or groove ends, these joints can be configured as single, dual, or triple bellows assemblies for greater movement capacity. Optional internal flow liners and control rods ensure stability under thermal and mechanical stress. Manufactured from 304, 321, or 316 stainless steel, the 30MC Series is ideal for wastewater, construction, energy, marine, aeration, and exhaust systems. Choose from fully welded expansion joints or bellows-only configurations for fabrication into your system.
Features & Benefits
– Multi-Ply Construction
– Easier Movement
– Long Life – 30,000 Plus Cycles
– Less force to actuate
– Greater Vibration Absorption
– Reduces system stress & noise
– Shorter OAL
– Internal Stainless-Steel Liner (optional)
– Saves space, reduces weight & eases installation
– Fixed by Floating Flange (optional)
– Quick bolt hole alignment
Applications
– Exhaust Systems
– Marine Propulsion
– Diesel Engines
– Generator Sets
– Gas Turbines
– Piping System Growth
Markets Served
– Marine / Ship Building
– OEM Equipment
– Power Generation
– Railroad
– Wastewater Treatment
30MC Series Standard Sizes
Need a custom flexible metal solution?
If your system requires non-standard movement, pressure, or connection configurations, Flex-Weld engineers can design and fabricate custom expansion joints, metal bellows, and flexible hose assemblies to your exact specifications. We’ll tailor materials, end fittings, ply count, and cycle life to meet your application—whether it’s HVAC, power generation, chemical processing, or aerospace.
