Tag Archives: expansion joints

Expansion Joint Division – FSA Annual Meeting 2017

On October 26, in Fort Worth, Texas, the Expansion Joint Division will be discussing the activities of the Ducting Technical Committee, which includes reviewing of material properties and specifications and guideline for application and selection. The Piping Technical Committee will discuss the updated technical handbook and educational activities and opportunities. The Division overall will continue their discussion on combining the Ducting and Piping Divisions and goals moving forward, including a membership drive and promotion of the FSA.

FSA Publishes the 8th Edition of the Piping Expansion Joints Handbook

The Piping Expansion Joint Division of the FSA recently completed revisions for the 8th edition of the Piping Handbook, now called the Piping Expansion Joints Technical Handbook. The revised handbook includes a contemporary format with new three-dimensional graphics. The technical content has been expanded and revised to reflect a wider variety of expansion joints and to make the handbook more relevant to the user.

The handbook provides up-to-date compilations of construction standards and guides for specifying and purchasing non-metallic expansion joints and flexible pipe connectors. It is based on the latest information concerning research, design and application of rubber (elastomer) expansion joints by engineers associated with the FSA’s Non-Metallic Expansion Joint Division member companies.

Click here to read more about the new handbook.

Click here to download the new handbook.

Back to Basics: Expansion Joints

Many members of the Fluid Sealing Association (FSA) Non-Metallic Expansion Joint Division and of the Expansion Joint Manufacturers Association (EJMA) feel that expansion joints are the forgotten components of many piping systems. Other piping systems components – flanges, gaskets, strainers, valves, pumps and the pipe itself – seem to get most of the design time.

In many ways, expansion joints are the most important components of a well-designed piping system. They are the “living and breathing” dynamic part of the whole system.

Without well-designed and well-placed expansion joints, parts such as pump nozzles, valve bodies and pipe anchors could face excessive loading and vibrational fatigue. Without proper compensation, thermal growth at elevated temperatures can damage some pipes, reducing their operation life.

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FSA Releases Updated Expansion Joints – Piping Technical Handbook

The FSA has just released a complete update of their Expansion Joints – Piping Technical Handbook. Edition 8.0 is based on the latest experience in research, design, and application of piping expansion joints by engineers associated with the Expansion Joint – Piping Division member companies in the FSA.

This publication is available for free download at: http://www.fluidsealing.com/expansion-joints/expansion-joints-publications/

The Expansion Joints – Piping Technical Handbook, edition 8.0, includes:

  • updated renderings of expansion joints and expansion joint layouts.
  • a new section on specialized expansion joints, such as hinged rubber expansion joints, gimbaled rubber joints and pressure balanced expansion joints.
  • a comprehensive list of definitions as they are viewed within the industry.
  • an expansion joint specification sheet for end users to gather information for customer inquiries to FSA member companies.

The publication is intended to be a reference source of information and data for engineers who design and install piping systems. It provides guidance on design and selection of material and proper installation.

“The collaboration on the revised handbook was fantastic. All Expansion Joint – Piping Division members put a lot of effort into the redesign of this handbook,” said Rob Coffee, FSA Vice President. “Special recognition goes to Mr. Gary Eiseman of Dinatecnica for taking the lead on organization of the project.”

 Piping Technical Handbook 8.0 Cover FINAL

Rubber Expansion Joints Provide Piping Flexibility

This component can compensate for misalignments up to 1/8 of an inch. 

Rubber expansion joints are used in piping installations to compensate for thermal growth, relieve piping stress during operation, and reduce vibration and noise caused by rotating equipment. While a rubber expansion joint can compensate for pipeline misalignment, this compliant product has installation and operations limitations. the best method for installing most piping products, including rubber expansion joints, is to follow standardized piping practices and use an installation tolerance of less than 1/8 of an inch.

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Install Smarter to Extend Expansion Joint Life

The criteria for expansion joint selection for fluid piping applications focuses on the expansion joint’s quality, durability and capabilities. To ensure that the rubber expansion joint’s installation provides optimal service life, operators and maintenance personnel must consider specific conditions and take a systematic approach. Piping systems require some degree of flexibility. Inadequate flexibility can lead to a catastrophic, potentially life-threatening system failure, making flexibility an important consideration when selecting an expansion joint.

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Why Flexible Graphite’s Consistent Quality is Ideal for Seals, Packings, & Gaskets

Many associations, societies and regulatory agencies have rewritten and redeveloped emissions and leakage standards and controls year after year. When the process rules are changed, manufacturers of seals, packing and gaskets are forced to implement changes as well. The manufacturers either produce seals that are better suited to handle the new regulations or they drop out of the market. These changes affect the way end users must look at the quality of flexible graphite and its ability to seal. Click here to read more.

Expansion Joint Selection Optimizes Piping Systems

When discussing expansion joint selection, the conversation typically focuses on the quality, durability and capabilities of the expansion joint. However, the expansion joint’s role in the overall energy efficiency and optimization of the piping system is often overlooked.

All piping systems require some degree of flexibility. Inadequate flexibility can lead to a catastrophic system failure that could even be life-threatening, making flexibility an important consideration in expansion joint selection.

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What should be considered for the selection of expansion joints for pumps?

While defining all the possible causes of a failed expansion joint or pump flexible connector is important, doing everything possible to get it right the first time is equally important. This can save the end user money and time by delaying significant replacement costs and failures.  All components and system requirements must be considered when choosing an expansion joint for the particular application. Uncovering all the factors that may influence reliable performance provides for the most ideal selection.

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What are the most important considerations before and after ordering a nonmetallic expansion joint?

Nonmetallic expansion joints for piping systems are often neglected when planning ahead for an upcoming outage or standard preventative maintenance plan. They are a product that seems to fall between what
is typically defined as an engineered item and a commodity item. Therefore, there always seems to be a scramble at the time of replacement.

Some important considerations before ordering an expansion joint for replacement should be:
• What is the visual condition of the joint? Is there cracking, leaking, soft spots, etc.?
• What is the age of the joint?
• What are the physical dimensions (face-to-face, angular, lateral or torsional offset)?
• What are the service conditions of the application (media, temperature, pressure and movement)?

These are all important to consider and can be determined by a good field survey. A complete field survey can save money and grief during and after installation, including future down time. Visual examination of the joint being replaced and its length of service provide insight for selection of the best replacement. For example, damage from chemical attack, over elongation and premature deterioration can signal the need for changes in materials or design.

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