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Categories - Frequently Asked Questions (FAQ)

Category Articles
Where do we use expansion joints in piping?
Added on Mon, Feb 7, 2011
Using expansion joints in piping depends upon the configuration of the piping where you will place the expansion joint to absorb thermal expansion or contraction. Fabric Expansion Joint Used in a Piping System Read More
Where are expansion joints required in power plants?
Added on Thu, Feb 10, 2011
Expansion joints are required anywhere throughout the plant where thermal expansion must be absorbed. One example where expansion joints may be used in a power plant would be on piping running to power turbines or condensers. Tied Universal... Read More
When are expansion joints needed for pipelines?
Added on Thu, Feb 10, 2011
Expansion joints are needed to absorb thermal movement when piping flexibility will not solve the problem. 92" Double Hinged Reinforced Expansion Joint for Water Service Read More
What’s the typical spring rate for a 20" pressure balanced expansion joint?
Added on Fri, Oct 19, 2012
The spring rate is equal to the spring rate of both flow bellows plus the spring rate of the balancing bellows. Elbow Pressure Balanced Pipe Expansion Joint Read More
Which type of joint is used for fuel oil & fuel gas applications?
Added on Thu, Nov 3, 2011
The expansion joint used for fuel oil and fuel gas applications depends on the movement and design conditions of the particular application within the plant. Fabric Expansion Joints Read More
What is an expansion joint used for?
Added on Mon, Feb 7, 2011
An expansion joint is used to absorb dimensional changes, such as those caused by thermal expansion or contraction of a pipeline, duct, or vessel. High Temperature Fabric Expansion Joint Designed for an Exhaust Duct Read More
How many expansion joints should be used in a pipe?
Added on Mon, Feb 7, 2011
The number of expansion joints used in a pipe depends on the length of the pipe, the pressure, the temperature, and the size. Upon knowing these design conditions, we can inform you of the number of expansion joints the pipeline requires. Read More
For an inline pressure balanced expansion joint, overall speaking, is it equivalent to a simple expansion joint without thrust force?
Added on Fri, Oct 19, 2012
No, it is the total of the spring rates of all three bellows. 36" Pressure Balanced Elbow Pipe Expansion Joint Read More
For a higher pressure system, how do you absorb pipe axial displacement without pressure thrust going to equipment with use of the expansion joint?
Added on Fri, Oct 19, 2012
By using an in-line pressure balanced expansion joint.   In-line Pressure Balanced Expansion Joint Read More
Can bellows be used to absorb vibration, for example, caused by a pump?
Added on Thu, Nov 3, 2011
Yes, this is one of the expansion joint functions. Read More
Can a double gimble expansion joint be used both vertically and horizontally without any extra piping support?
Added on Tue, Oct 16, 2012
The weight of the units is self-supporting but the additional weight of the piping, elbows etc. in the field will not be supported by the expansion joint. Gimbal pipe expansion joint Read More
Are toroidals commonly used as heat exchangers?
Added on Tue, Oct 16, 2012
Toroidals can be used but not often. Most exchange use normal thin-wall expansion joints or thick-wall expansion joints fabricated from flanged and flued heads.   72" inch thick wall pipe expansion joint. Read More
What is the maximum operating temperature range that expansion joints can be exposed to?
Added on Tue, Oct 16, 2012
Regarding the operating temperature, we design metal pipe expansion joints up to 2000° F with refractory and 1000° F to 1500° F without refractory. Metallic Expansion Joint Read More
Is the bellow really being compressed or is the entire bellow is moving?
Added on Fri, Oct 19, 2012
When there is an axial movement, the in-line bellows will start compressing and the balancing bellows will extend and vice versa. Both bellows will be moving. In-line Pressure Balanced Expansion Joint Read More

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