RING REINFORCED
EXPANSION JOINTS

Belman designs, manufactures and delivers high pressure ring reinforced expansion joints. We have successfully manufactured expansion joints with different dimensions and for different applications, designed for a working pressure of more than 185 bar.

 

Why ring reinforcement?
By supporting a multi-layered ring reinforced expansion joints, an optimum combination of both pressure integrity and service life is achieved.

DIMENSIONS OF RING REINFORCED
EXPANSION JOINTS

Ring reinforced expansion joints are customised solutions designed to fit the application.
They are available in all designs, all sizes and all materials

EQUALISING RING REINFORCED EXPANSION JOINT PROJECTS

Oil platform - The Caspian Sea

RING REINFORCED CORNER RELIEF EXPANSION JOINT

Oil refinery - Poland

RING REINFORCED EXPANSION JOINT

Oil platform - The Caspian Sea

RING REINFORCED CORNER RELIEF EXPANSION JOINT

Oil refinery - Poland

RING REINFORCED EXPANSION JOINT

Pressure vessel - United Kingdom

TESTED AT 251 BARG

Chemical plant - USA

RING REINFORCED PRESSURE BALANCED EXPANSION JOINT

Pressure vessel - United Kingdom

TESTED AT 251 BARG

Chemical plant - USA

RING REINFORCED PRESSURE BALANCED EXPANSION JOINT

EXCELLENCE IN

ENGINEERING OF
EQUALISING RING REINFORCED EXPANSION JOINTS

Belman ring reinforced expansion joint

TECHNICAL DESCRIPTION OF
RING REINFORCED EXPANSION JOINTS

Ring reinforced expansion joints with equalising rings and reinforcing ring bellows are usually chosen for high-pressure installations. Equalising rings are solid stainless steel rings fitted externally on the bellows of the ring reinforced expansion joints. The rings are precisely machined so they fit into the root between each of the bellows convolutions. The purpose of the rings is to reinforce the bellows against internal pressure. By adding moment of inertia to the bellows cross section, this counteracts the bellows ability to blow out or buckle (also called squirm) and enhances its stability and pressure integrity. Bellows with reinforcing rings can be made for any type of expansion joint (axial, lateral or angular etc.) The disadvantage of the ring reinforced expansion joints having reinforced bellows are the significantly increased stiffness of the bellows and their limited movement properties.

 

Special ring reinforced solutions
For expansion joints with demanding operating conditions, the ring reinforcement is designed with bellows of thicker plies, of duplex stainless steel for additional strength. The reinforcement rings are supported by tie rods, which are connected to lugs. The improved flexibility of the expansion joints is further enhanced by an extra balancing bellow, which in combination with the pressure balanced design help to bring the reaction forces towards an acceptable level.

Experienced &
FAMILIAR WITH
MANY DESIGN CODES
Belman can design, manufacture and deliver ring reinforced expansion joints in accordance to:
  • EN 13445
  • EN 14917
  • EJMA
Other design codes are available on request.