TUTORIALES

Here you will periodically find basic information about expansion joints and compensators. BIKAR makes available a group of experts you can rely on, and who are ready to collaborate on the installation.

See a detailed list of the sectors where we supply our expansion joint products and services.

Basic expansion joint course
Data of interest in the design of an expansion joint
Main causes of failure for expansion joints

DATA OF INTEREST IN THE DESIGN OF AN EXPANSION JOINT

Selecting and purchasing an expansion joint is not just a matter of finding out information about its dimensions and pressure rating, and the movements in the system.

There are other parameters that have a decisive influence on its design and cost, such as: planned cycles; whether movements are concurrent; the need for an inner sleeve or exterior protection; regulations to be complied with; the pipe coupling planned for use; the space available; the layout of the pipe system, supports, anchoring, guides, etc..; the need and justification for the use of braces; the pipe materials; limitation of the activation forces; etc., etc.

An appropriately designed expansion joint offers durable service with no unexpected surprises.

1- WHAT IS AN EXPANSION JOINT?

An expansion joint or compensator is a flexible element made up of one or more convolutions/arches. It is designed to resist the internal pressure of a particular fluid at its working temperature, and must be sufficiently flexible to absorb any movements present.

2- WHY ARE THEY USED?

In a pipe system there are a variety of methods that can be applied to absorb the stresses produced by termal movements (axial, lateral, and/or angular), or by vibrations, earth settling, assembly misalignments, etc. Of the existing methods (a flexible section of pipe, adjusting plates or ties, sliding joints, or expansion joints), the one preferred by most pipe system designers is the expansion joint, since it can perform the same function while requiring less space.

3- HOW SHOULD THEY BE USED?

Depending upon the design of the pipe system, a joint may belong to either the “unrestricted” or “restricted” type.

If “unrestricted”, perfect placement of the anchoring and guides is required for proper functioning, since under the effects of the pressure a longitudinal force is exerted in both directions from the expansion joint, and this force must be resisted by the system.

For “restricted” joints (control rods, articulations, etc.), only some lightweight supports are needed, which in addition to the external loads (weight, wind, etc.), resist the activation forces of the expansion joint and the rotational forces in the support guides.

4- WHAT DOES THE ACTIVATION FORCE OF AN EXPANSION JOINT MEAN?

This is the force that must be applied to an expansion joint in order to move or activate the movement of its waves, which absorb the corresponding movement. This force is measured in N/mm and is a function of the expansión joint’s design (the rigidity of its construction based upon its design, the materials used, number of layers, reinforcements, etc.). On some occasions this may be excessively high, especially when the pipe system is made from materials with low rigidity (plastics, GRP, etc.)

If you would like to learn more about expansion joints, request our “Training course”.

NEWS

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Bikar Quality team recently performed the agreed hydrostatic test to the requested expansion joints. During the same, the selected expansion joints were tested according to the FSA (Fluid Sealing Association)…

RUBBER EXPANSION JOINTS READY TO BE SHIPPED TO MIDDLE EAST DESALINATION PLANT

Bikar continues its specialization in high demanding industry as Desalination with this customized order ready to be shipped to site. This set of expansion joints has been designed, produced, tested…

BATCH NUMBER 5 TO BE PACKED AND DISPATCHED TO A NEW SWRO PLANT IN UAE

Due to the high number of expansion joints existing in this project, Bikar agreed to deliver the material in 5 partial deliveries. The main target of this strategy is to…

DISMANTLING JOINTS FOR KSA

Bikar designed, produced and supplied a new set of dismantling joints towards one of the main Water Transmission System projects in KSA. The set consisted in big sized dismantling joints…

EXPANSION JOINTS FOR 8 NEW DESALINATION PLANTS IN KSA

Bikar was the awarded Company for the manufacturing and supplying contract of the expansion joints towards to the New 8 Satellite Plants built along the Red Sea Coast, East Coast…

NEW EXPANSION JOINTS SUPPLY AGREEMENT FOR THE COMBINED CYCLE POWER PLANT EXTENSION IN KUWAIT

Bikar makes official a new agreement for the design and supply of expansion joints package. The order will supply for the new phase of the combined cycle power plant is…

BIKAR RECEIVES THE 2018 DIPLOMA REGARDING ADVANCED MANAGEMENT

We are proud to announce we have satisfactorily renewed our diploma in Advance Management issued by the governmental Agency Euskalit

BIKAR TO SUPPLY EXPANSION JOINTS FOR A NEW DESALINATION PLANT IN SAUDI ARABIA

Bikar is designing, manufacturing and supplying rubber expansion joint packages for one of the newest desalination plant in the Kingdom The 250.000m3/d RO plant will supply potable water to Saline…

BIKAR TO SUPPLY EXPANSION JOINTS FOR ONE OF THE MAIN POWER PLANTS IN KUWAIT – COMBINED CYLE

Bikar is supplying 4 packages of metal and rubber expansion joints for the mentioned combined cycle power plant   Bikar is facing the last stages of manufacturing the 2 remain…