Metal Expansion Joints
Exhaust Bellows – Stainless Steel Expansion Joints – Metal Expansion Bellows – Marine Exhaust Bellows – Food Grade PTFE Lined Expansion Joints
Flexiducting New Zealand supply a range of stainless steel expansion joints, flexible metallic expansion bellows and exhaust bellows, Food Grade PTFE Lined Expansion Joints custom manufactured with flanges or pipe ends to suit your application . Designed with capability to absorb axial, lateral, angular and seismic movements at very high or extremely low temperatures, and at high pressures (100 Bar)
Standard Expansion Joint Types
- Single and Double unrestrained expansion joints
- PTFE Lined Expansion Bellows
- Marine Exhaust Bellows
- Single and Double tied joints
- Multi-ply diesel exhaust bellows and vibration eliminators
- Single and double hinged joints
- Single and double gimbal joints
- Seismic joints
- Externally pressurised joints
- Pressure balanced joints
- High Pressure Expansion Joints
- Thick Wall Bellows
- Rectangular expansion joints
All of the above assemblies are available with flanged ends, welded ends, internal sleeves (liners) and covers. As well as the above we can design and manufacture non-standard expansion bellows, no matter how unusual the application. We can manufacture using a wide range of materials, from the more commonly used stainless steel grades 321, 316 and 304, to the more specialist Incoloy 825 and 800, Inconel 625 and 600, Nickel 200, 253 MA and Hastelloy 254 SMO.
SEJ Single Expansion Joint
Regardless of accessories, such as liners and covers, this model absorbs all of the movements in any one length of piping but it is mainly used to absorb axial movements.
It does not restrain pressure thrust so adequate anchors and guides must be provided and they can be used only in piping systems that incorporate correctly designed anchors and pipe alignment guides.
TSEJ Single Tied Expansion Joint
These expansion joints are made of one single bellows element with end connections.
Regardless of accessories, such as liners and covers, this model absorbs all of the movements in any one length of piping but it is mainly used to absorb axial movements. It does not restrain pressure thrust so adequate anchors and guides must be provided and they can be used only in piping systems that incorporate correctly designed anchors and pipe alignment guides.
Universal – Double Expansion Joint
Also known as the universal un-tied expansion joint this model is made up of two bellows joined together by a central pipe.
Although it can be used to absorb any combination of the three basic movements it is mainly used to absorb large lateral movements.
It does not restrain pressure thrust so adequate anchors and guides must be provided and they can be used only in a piping systems that incorporate correctly designed anchors and pipe alignment guides.
Universal – Double Tied Expansion Joint
This model is made up of two bellows joined together by a central pipe and a system of tie rods able to withstand the thrust produced by the internal pressure.
This model is used to absorb lateral movements in all planes.
The tie rods are provided in sets of two or more, equally distributed around the circumference of the expansion joint.
The amount of lateral deflection capability can be increased or decreased by simply changing the length of the spool pipe and the thermal expansion of the central pipe is taken by the bellows elements.
Gimbal Expansion Joint
Gimbal Expansion Joints are made of one single or double bellows element designed to allow angular movement in any plane by the use of two pairs of hinges affixed to a common floating gimbal ring.
The gimbal ring, hinged and pins are designed to restrain the pressure thrust due to internal pressure and shear forces.
A gimbal ring is either round or square.