April — 2012 — The Expansion Joints Blog

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Archive for April, 2012

View Technical Data on Single, Universal, and Externally Pressurized Expansion Joints

April 30th, 2012 Comments off

View the technical data, including maximum axial and lateral movement, number of corrugations, etc. for single, multi-ply and externally pressurized metallic expansion joints.

Duct Work Photo Gallery Single and Multi-ply Stainless Steel Expansion Joints
Universal Expansion Joints – Data Tables by Nominal Diameter
Externally Pressurized Expansion (X-Flex) Joints

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.

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