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Universal Tied Expansion Joint, 48″ Dia. and 141″ OAL, for Service in an Acid Regeneration Plant

May 7th, 2012 Comments off

Universal Tied Expansion Joint, 48" Dia. and 141" OAL, for Service in an Acid Regeneration Plant

A tied universal expansion joint was custom designed for service in an acid regeneration plant in Louisiana. It is 48″ in diameter, 141″ in overall length and designed for 1″ axial movement, 2-1/2″ lateral movement and .33° angular rotation. The expansion joint is fabricated with 310 stainless steel bellows, and 301 SS liner, duct, flanges, transition duct and covers. It was designed for 10 psig at 1150°F, and was dye penetrant examined, hydro-tested at 15 psig, and the bellows and pipe longitudinal weld seams were 100% x-rayed.

Fabric Expansion Joints Designed for a Lignite Coal Processing & Gasification Plant

April 23rd, 2012 Comments off

Fabric Expansion Joints Designed for a Lignite Coal Processing & Gasification Plant

Fabric Expansion Joints Designed for a Lignite Coal Processing & Gasification Plant

A total of thirty-six fabric expansion joints were custom designed for a lignite coal processing and gasification plant in Mississippi. They are 12″ diameter, 14″ overall length and designed for 1/4″ axial movement and .8″ lateral movement. The expansion joints are fabricated with carbon steel flange ends, stainless steel clamps and a PTFE coated fabric belt. They are designed for hot air circulation flow at 600°F and a pressure of 30″ water column.

Fabric Expansion Joints from High Temp. Furnace Bags to E.J. and Duct Work Assemblies

April 16th, 2012 Comments off

Fabric expansion joints are often used in ducts which carry hot gases at low pressures. The major design parameters are the temperatures and flow rates of the gases and the amount and abrasiveness of solids suspended in the gases. Layers of different fabrics insulation can be combined to accommodate the temperatures and pressure in the system. We specialize in all types of fabric expansion joints from high temperature furnace bags to fabric expansion joint and duct work assemblies.

View the Materials Comparison Chart to see the details behind each material used in fabric expansion joints.

Air Duct Fabric Expansion Joint 44" Diameter Fabric Expansion Joint 24" Diameter Fabric Expansion Joint
Air Duct Fabric
Expansion Joint
44″ Dia. Fabric
Expansion Joint
24″ Dia. Fabric
Expansion Joint

Get pricing now for your next fabric expansion joint project.

42″ Dia. Stainless Steel Expansion Joints for an Offshore Application

April 9th, 2012 Comments off

42" Dia. Stainless Steel Expansion Joints for an Offshore Application

These universal metallic expansion joints were custom designed for an offshore application. They are 42″ diameter, 24″ overall length and designed for 2″ axial movement and 1-1/2″ lateral movement. The expansion joints are fabricated entirely from 316 L stainless steel and designed for 1,000°F and 1 psig. Each unit was 100% dye penetrant examined and soap and air tested prior to shipment.

High Temperature Furnace Sealing Bags Designed to Prevent Heat Loss

April 2nd, 2012 Comments off

Furnace Sealing Bag, A High-Temperature fabric Expansion Joint

A special type of high-temperature fabric expansion joint developed by U.S. Bellows, Inc. is the furnace sealing bag. The objective of the bag is to seal the air inlet conduits’ penetrations into a furnace and thus prevent heat loss. Because of thermal expansion of both the conduits and the furnace, the bag must be able to expand and contract during normal cycles of operation.

Furnace Sealing Bag, A High-Temperature fabric Expansion Joint

The bag consists of a tapered sleeve formed from layers of flexible, flame and heat-resistant impervious fabric, which is connected at its upper end to another sleeve in the furnace floor. The lower end of the bag is connected to the air inlet

conduit (usually a pipe) so as to form an airtight seal. The connection to this pipe is made such that the fabric is collapsed when the furnace is cold and extended when the furnace is hot. When required, a tapered coil spring formed from suitable metal is installed around the conduit inside the bag. This prevents the fabric from collapsing inward during vacuum conditions inside the furnace. For most applications, band straps may be used to attach the bag at both ends.

Read more in this technical bulletin on High Temperature Furnace Seal Bags.

U.S. Bellows: Expansion Joints In-depth Webinar

March 29th, 2012 Comments off

U.S. Bellows: Expansion Joints In-depth Webinar

Date: Thursday, April 12, 2012 / Time: 10:00 am CST

This Webinar is over, to view the recording, please visit: http://usbellows.com/news/webinar_index.html

* Live Webinars are approved for 1 PDH credit for TX P.E.’s

Register for the New U.S. Bellows Expansion Joints In-depth WebinarGet to know U.S. Bellows from introducing our team and manufacturing capabilities to exploring design details in technical drawings for large-scale projects. View case studies that lead to the creation of new standards and designs. Learn about cost saving measures for expansion joint failures and how to prevent future problems.

U.S. Bellows, Inc., a division of PT&P, has more than 50 years of experience designing and manufacturing expansion joints, along with replacement and repair services.

Browse Our Brand New Fabric Expansion Joint Catalog Online

March 26th, 2012 Comments off

U.S. Bellows is proud to release our online fabric expansion joint catalog!

Fabric expansion joints perform a function of compensating for duct misalignment and duct thermal growth typical in power plants and other ducting systems. Fabric expansion joints are found wherever there is a need to convey hot media in low pressure applications such as “in flowing air” and “out flowing gas” in large combustion processes.

Browse our fabric expansion Joint catalog!

  1. Learn About Fabric Expansion Joints
  2. Find the Right Fabric Expansion Joints by Applications & Conditions
  3. Fabric Expansion Joint Design Styles
  4. Fabric Expansion Joint Materials

12″ Dia. Universal Expansion Joints with Stainless Steel Bellows

March 26th, 2012 Comments off

12" Dia. Universal Expansion Joints with Stainless Steel Bellows

These universal metallic expansion joints were custom designed for a chemical plant in Texas. They are fabricated entirely from stainless steel with 304 stainless steel bellows. The expansion joints are 12" diameter, 77-1/2" long and designed for 4-1/2" axial movement and 2" lateral movement. They were designed for 200°F and 100 psig. Each unit was 100% dye penetrant examined and hydrotested prior to shipment.

102″ Dia. Tied Universal and Hinged Expansion Joints

March 12th, 2012 Comments off

102" Dia. Tied Universal and Hinged Expansion Joints

U.S. Bellows designed and fabricated tied universal expansion joints and single hinged expansion joints for a power plant in Canada. All the units were fabricated from carbon steel with 316 stainless steel bellows. The universal tied joints are 102″ diameter, 225″ long and are designed for 8.2″ lateral movement. The hinged joints are 102″ diameter, 71″ long and designed for 0.76° angular rotation. Each expansion joint can withstand temperatures up to 250°F at 7.25 psig. The bellows and pipe long seams were 100% x-rayed, and all the welds were 100% dye penetrant tested. A soap and air test was performed prior to shipment.

102" Dia. Tied Universal and Hinged Expansion Joints

Where Fabric Expansion Joints are Typically Used in a Fossil Fired Power Plant

March 2nd, 2012 Comments off

See an example of how fabric expansion joints are being used with ducting. The figure below represents a typical balanced draft system with a “cold” precipitator. The black components represent the locations of fabric expansion joints throughout the system.

Expansion Joints in a Typical Blanced Draft System with a Cold Precipitator

**The examples above are representative and should not be used for design. The user should obtain actual values for the particular system being considered

The main sections of the ducting are as follows:

  • FD Fan to Air Preheater
  • Air Preheater to Boiler
  • Air Preheater to Pulverizer
  • Air Preheater to Inlet from Boiler
  • Air Preheater to Precipitator or Bag house
  • Precipitator or Bag house to ID Fan
  • ID Fan to Scrubber
  • Scrubber to Stack

 

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