Tag Archives: expansion joint

Style 404 Expansion Joint for Abrasive Applications

Abra-Line Style 404The ABRA-LINE™ family of products was developed for highly abrasive applications typically found in the power generation, fertilizer, mining and chemical industries. These may include flue gas desulphurization systems, phosphate mining, dry bulk power transfer systems, tailings and slurry applications. Our proprietary urethane formula was designed to reduce wear and extend
service life.

Style 404 Expansion Joints are specially designed for full vacuum abrasive service applications. The tube material is a proprietary urethane formulation. Style 404 can be constructed as a single or multiple arch design. It can also connect pipe flanges in concentric or eccentric tapers, to join piping of unequal diameters.

Case Study: Chemical Processing

Industry
Chemical Processing

Observation
A stainless hosing was used and would continuously fail due to abrasion on the leading edge of the hose. The hosing would last for 3 to 6 months before replacement.

Continue reading Style 404 Expansion Joint for Abrasive Applications

NEW Expansion Joint Material – ABRA-SHIELD™

Garlock is excited to announce the launch of ABRA-SHIELD, a new expansion joint material designed for abrasion resistance and sustainability in demanding high temperature operating conditions.

ABRA-SHIELD™As the newest addition to Garlock’s family of abrasion resistant expansion joint materials, ABRA-SHIELD will join ABRA-LINE® and Natural Rubber to provide a variety of liners that cater to increased abrasion protection. ABRA-SHIELD will be an option for use with a number of expansion joint products that Garlock offers – including styles 204, 206, 7250, 8400 and 9394. These expansion joints also provide high levels of protection from stress, misalignment, vibration, noise, shock and corrosion.

In abrasion resistance testing – which provides data to compare materials and predict the lifetime of a material or coating – ABRA-SHIELD provided 50% higher abrasion resistance than standard EPDM (ethylene propylene diene monomer rubber). ABRA-SHIELD will be the recommended solution in abrasive applications (such as slurry, ash and brine) with sustained or spiked temperatures between 180°F and 300°F. For temperatures outside of this range, other materials in Garlock’s family of abrasion resistant expansion joints would be suggested.

Continue reading NEW Expansion Joint Material – ABRA-SHIELD™

When to Use Flue Duct Expansion Joints

Flue Duct - Expansion Joint Design GuideIn July, Gallagher released its Expansion Joint Design Guide, now available for download on our site.  This design guide takes an in-depth look at elastomeric, metal, and flue duct expansion joints.  The excerpt below is a section of our Expansion Joint Design Guide focusing on types of flue duct expansion joints.  To download the entire guide, visit our Resources Page, or click on the image to the right.


Flue Duct Expansion Joints

Used to manage air and gas handling systems, flue duct expansion joints are most widely utilized in the Power Generation, Industrial & Institutional industries:

  • Flue Duct Expansion JointPower Plants
    • Simple Cycle
    • Combined Cycle
    • Co-generation
    • Coal Fired
  • Industrial Operations
    • Steel Mills
    • Paper Mills
    • Cement Plants
  • Institutional Sites
    • Hospitals
    • Schools
    • University Campuses

Continue reading When to Use Flue Duct Expansion Joints

Metal Expansion Joints for High Temperature/Pressure

Expansion Joint Design Guide - Metal Expansion JointsGallagher recently released its Expansion Joint Design Guide, now available for download on our site.  This design guide takes an in-depth look at elastomeric, metal, and flue duct expansion joints.  The excerpt below is a section of our Expansion Joint Design Guide focusing on types of metal expansion joints.  To download the entire guide, visit our Resources Page, or click on the image to the right.


Much like elastomeric expansion joints, metal expansion joints are used to preserve the integrity of a piping system where the piping is subject to changes in temperature, pressure, vibration, compression, extension, cyclical movements or movements required by usage.

Oftentimes, metal expansion joints are used when an elastomeric joint simply cannot handle the extreme conditions – applications where high temperature, large temperature range, or high pressure exists. Generally, metal expansion joints can be used from -450°F to +2000°F, depending on the metallurgy, and can also handle pressures from full vacuum to 3,000psi.

Metal Expansion Joint Components

Though customized and intricate expansion joints can be manufactured for a variety of specialized applications, there are four basic designs that are most commonly used:

Metal Expansion Joints - Basic BellowsBasic Bellows

A bellows can be supplied without end fittings for field installation. The skirt, or straight portion at each end of the bellows, can be sized to fit a flange or pipe. Skirt length can vary depending on your needs and should be specified when ordered.


Metal Expansion Joints - Unrestrained SingleUnrestrained Single

An unrestrained single expansion joint is best used by piping systems which are equipped with proper guides and anchors to absorb axial, angular, and a small amount of lateral movement.

Continue reading Metal Expansion Joints for High Temperature/Pressure

Elastomeric Expansion Joint Installation

Expansion Joint Design GuideGallagher recently released its Expansion Joint Design Guide, now available for download on our site.  This design guide takes an in-depth look at elastomeric, metal, and flue duct expansion joints.  The excerpt below is a section of our Expansion Joint Design Guide focusing on types of elastomeric joint installation, pipe layouts, and joint troubleshooting.  To download the entire guide, visit our Resources Page, or click on the image to the right.


Preparation

Expansion Joint InstallationCheck Service Range
  • Double check expansion joint performance limits against anticipated operating conditions
  • Check temperature, pressure, vacuum recommendations
  • Check total joint deflection—alter as needed to reduce deflection to correct range
  • Anchor lines
Check Location
  • Proper location is usually close to main anchoring point
  • Install pipe guide(s) for proper alignment
  • Joint should absorb pipeline expansion / contraction between fixed anchor points

Continue reading Elastomeric Expansion Joint Installation

Elastomeric Expansion Joint Components

From the outside, an elastomeric expansion joint looks to simply be made out of molded rubber.  Part of the reason expansion joints are used in such a wide variety of applications is that the interior construction of a joint can be custom-designed to handle your specific application – materials of construction will depend on size, temperature, application, media, pressure (S.T.A.M.P.).

Layers of Construction

Tube

  • Synthetic or natural rubber forms seamless, leak-proof lining
  • Extends fully through bore to outer flange edge
  • Common materials include chlorobutyl, neoprene, natural rubber, EPDM, Viton* and Hypalon*

Body or Carcass

  • Expansion JointWhen wrapped or plied, reinforcements provide support and flexibility between tube and cover
  • Fabric reinforcement: polyester or other suitable fabrics impregnated with specified elastomers
  • Metal reinforcement: bonded rectangular steel rings [exclusive to Garlock], or continuous strands of wire and round steel body rings
  • Metal reinforcement rings provide longer service life, extra safety protection, and extra rigidity, allowing higher pressure ratings

Expansion Joints - Download your Design Guide Continue reading Elastomeric Expansion Joint Components

Rubber vs. Metal Expansion Joints

An expansion joint can relieve stress in piping systems and prevent flange gaskets from being crushed.  But which expansion joint is best for your specific application?  Let us first describe the two types of expansion joints:

Rubber — a flexible connector fabricated of natural and/or synthetic elastomers and fabric and, if necessary, internal metallic reinforcements designed to provide stress relief in piping systems due to thermal movements and mechanical vibration.

Metal — a flexible element (bellows) constructed of relatively thin gauge material (generally stainless steel) designed to absorb mechanical and thermal movements expected in service.

Advantages: Metal Expansion Joints

Expansion Joints - Metal
Typical Metal Expansion Joint

Temperature
Rubber joints with standard construction and materials have an upper range to 230°F. Most manufacturers, however, can offer special constructions up to 400°F. Metal expansion joints do offer a far greater range, from -420°F to +1800°F. However, working pressures are reduced at elevated temperatures.

Continue reading Rubber vs. Metal Expansion Joints

Now Available: Expansion Joint Design Guide

Expansion Joint Design GuideGallagher recently released its Expansion Joint Design Guide, now available for download on our site.  This design guide takes an in-depth look at elastomeric, metal, and flue duct expansion joints.  The excerpt below is the first section of our Expansion Joint Design Guide, diving into elastomeric expansion joints, and what to consider when selecting which joint is right for your application.  To download the entire guide, visit our Resources Page, or click on the image to the right.


What is an Expansion Joint?

Elastomeric Expansion JointAn expansion joint is a specially engineered product inserted in a rigid piping system to achieve one or more of the following:

  • Absorb movement
  • Relieve system strain due to thermal change
  • Reduce mechanical noise
  • Compensate for misalignment
  • Eliminate electrolysis between dissimilar metals (metal expansion joints)

They are built to expand, contract, and adjust without straining or breaking the piping or ducting on either side.  Essentially, an expansion joint is meant to protect the piping system from damage.

Continue reading Now Available: Expansion Joint Design Guide

Case Study: Style 4394 ABRA-LINE™ Expansion Joint

Gallagher Fluid Seals represents a number of expansion joint manufacturers, enabling us to provide an expansion joint for any piping system in any industry.  The ABRA-LINE™ Rubber Expansion Joints from Garlock are meant for highly-abrasive applications.

Expansion Joint: Style 4394The Garlock ABRA-LINE™ Style 4394 Rubber Expansion Joint is a multi-convoluted, lightweight expansion joint, designed for lower pressure applications that require significant amounts of movement, axially and/or laterally. Its low spring rates make it ideal for load cell, bin activator, vibrating bin, silo, and shaker boot applications.  The below success story comes directly from Garlock and an application using the ABRA-LINE™ Style 4394 joints.

Continue reading Case Study: Style 4394 ABRA-LINE™ Expansion Joint

The Life Expectancy of Nonmetallic Expansion Joints

expansion jointsExpansion joints are specially engineered products inserted into a rigid piping system to do a number of jobs.

They absorb movement, relieve system strain due to thermal change, stress, pumping surges, wear, or settling, reduce mechanical noise, compensate for misalignment, and/or eliminate electrolysis between dissimilar metals.

When expansion joints are designed, applied, and installed correctly, it is not unusual to achieve a service life of 15-20 years in most industrial applications. Read on to see what our partners at Garlock had to say about troubleshooting in order to expand the life expectancy of nonmetallic expansion joints.

Continue reading The Life Expectancy of Nonmetallic Expansion Joints