Case Studies

Real specifications, not brochure numbers

Every entry below is grounded in an actual configuration we've built — sizes, pressure ratings, and industry context as documented, not composite marketing examples. Client names are shown only where we've confirmed the pairing publicly; the rest are shown by specification.

A note on attribution

We work with major industrial and government clients (see our client list), but we haven't yet confirmed which specific project maps to which named client for public reference. Rather than guess, the case studies below are described by real specification and application instead of a client name. Ask us directly if you'd like references for a specific industry or product line.

DJ 1800 NB large-bore dismantling joint
Dismantling Joint · DJ 1800 NB

Application: Large-bore municipal water transmission line.
Challenge: A section of pipe needed to be removable for periodic valve maintenance without cutting or re-welding the line.
Approach: A flanged dismantling joint sized to 1800 NB, engineered for repeated assembly/disassembly under working pressure.

DJ 2400 NB large-bore dismantling joint
Dismantling Joint · DJ 2400 NB

Application: Large-diameter water/wastewater infrastructure.
Challenge: Even larger bore than the 1800 NB variant, with the same requirement for maintenance access without service interruption beyond a planned window.
Approach: Custom-engineered 2400 NB dismantling joint, sized and rated to the line's specification.

High temperature expansion joint EJ-010
Expansion Joint · EJ-010 High Temp

Application: High-temperature process piping.
Challenge: Standard expansion joints degrade under sustained high thermal load; the line needed a joint rated specifically for elevated operating temperature.
Approach: High-temperature-rated expansion joint construction, material and ply configuration selected for the thermal duty.

High-pressure expansion joint rated 120 kg/cm2
Expansion Joint · High-Pressure (HPEJ)

Application: High-pressure piping requiring absorbed axial movement without transmitting force back to fixed equipment.
Challenge: Standard-pressure bellows aren't rated for the line's operating pressure.
Approach: High-pressure expansion joints engineered and tested to the line's pressure class — real units on file at 24, 120, and 160 kg/cm².

Pressure balanced expansion joint
Pressure Balanced Bellows · PEJ

Application: Piping run where unbalanced pressure thrust on anchors and supports needed to be eliminated.
Challenge: A standard expansion joint would transmit pressure thrust to the structure; the design called for a self-contained, pressure-balanced solution.
Approach: A pressure-balanced expansion joint assembly, engineered so internal pressure forces cancel rather than load the supporting structure.

Multi-ply metal bellows configuration
Metal Bellows · Multi-Ply Configuration

Application: Thermal power plant piping subject to cyclic thermal expansion.
Challenge: A single-ply bellows didn't offer sufficient fatigue life for the expected cycle count over the plant's service life.
Approach: Multi-ply metal bellows element (up to seven plies), verified with cyclic life testing before shipment.

Large-bore dismantling joint at the Uma Bellows facility, shown next to a technician for scale

A large-bore dismantling joint, shown next to a technician for scale.

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