Features:

1-Absorbs angular movements in all planes
2-Restrains pressure thrust forces
3-Transmits shear and wind loads
4-Supports dead weight
5-Avoid twisting the bellows
6-No main anchors required

The capacit y of the Gimbal Expansion Joints to absorb angular movements in any plane is usually applied by using two Gimbal Expansion Joints as shown in the diagram. Only two intermediate fixed points are requiered owing to the fact that the Gimbal system absorbs the thrust produced by the internal pressure. This system of two Gimbal Expansion Joints means that any vertical expansion of the pipes is absorbed by the bend in the horizontal sections of piping and it may therefore be necessary to install spring hangers in both sections.

When it is either impossible or undesirable for the horizontal sections of piping to absorb the expansion of the vertical section, a system composed of two Gimbal Expansion Joints plus one Hinged Expansion Joint must be used as shown in the diagram. The use of a Hinged Expansion Joint is justified by the fact that movement in the vertical section only occurs in one plane.

Hinged " Metal Expansion Joints"

Description:

These expansion joints are made of one single bellows element fitted with welding ends or flanges plus a system of articulated supports which allow for angular movement in one plane only. The hinge mechanism is designed to accept full pressure thrust.

These units do not allow axial movement however, some types of hinge systems can be provided with holes for the hinge pin that are slotted to allow limited axial displacement. These “slotted hinge” types can not resist the pressure thrust forces and therefore proper anchorage must be provided.

Features:

1-Absorbs angular movements in a single plane
2-Restrains pressure thrust forces
3-Transmits shear and wind loads
4-Supports dead weight
5-Avoid twisting the bellows
6-No main anchors required

Hinged expansion joint with welding ends.

Hinged expansion joint with flanges.

Two Hinged Expansion Joints or one single MWY/MFY double Expansion Joint can be used to absorb the thermal expansion in a Z-shaped section of piping which only occurs in one plane.

In the case of pure angular movement these Expansion Joints can be used to absorb expansion in a specific section of piping.

There is a different angle than 90º in the section of piping.

Single Unrestrained "Expansion Joints"

Description:

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.

Features:

1- Absorbs axial, lateral, and angular movements
2- Must be properly guided
3- Does not restrain the pressure thrust
4- Requires main and directional anchors

This type of Expansion Joint is made up of one single bellows provided with welding ends.

This type of Expansion Joint is made up of one single bellows equipped with fixed flanges.

The classic case of an Expansion Joint located in a straight section of piping installed between two main anchors.

The main anchors are located where pipes change directions in order to consider the straight section as an individual section of piping taking us to case no. 1