Pressure Balanced Elbow Expansion Joints — The Expansion Joints Blog

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26" Diameter Pressure Balanced Elbow Expansion Joint Refurbished for an Effluent Header at Cedar Bayou Plant

October 11th, 2010 Comments off

26" Diameter Pressure Balanced Elbow Expansion Joint Refurbished for an Effluent Header at Cedar Bayou Plant

U.S. Bellows, Inc. received this 26″ diameter pressure balanced elbow expansion joint for a complete refurbishment. New SA-240 type 321 stainless steel bellows were used to replace the original bellows, and the tie rods and flow liners were also replaced. All carbon steel parts were painted with a universal primer. This expansion joint measures over 17 feet long center to center of elbows, and is currently being used in an effluent header at Cedar Bayou plant.

Types of Metallic Expansion Joints

October 6th, 2010 Comments off

U.S. Bellows offers all types of metallic expansion joints. Each type has advantages and limitations that can provide flexibility, load reduction, structural integrity and reliability required in a piping system.

Metal expansion joints can withstand the design temperatures and pressures, as well as provide the capacity necessary to absorb thermal growth of the piping system. The thermal movement required can be axial, lateral or angular. In some cases, the pressure thrust of an expansion joint must be restrained by the use of tie rods, hinges or a gimbal while allowing the bellows to move through its design deflections.

Learn more about the different types of metallic expansion joints:

Types of Metallic Expansion Joints: Single, Universal, Hinged Single Expansion Joints —— Universal Expansion Joints ——- Hinged Expansion Joints


36" Pressure Balanced Elbow Expansion Joints

May 30th, 2007 Comments off
36" Pressure Balanced Elbow Expansion Joints

36" Pressure Balanced Elbow Expansion Joints

36" Pressure Balanced Elbow Expansion Joints

36" Pressure Balanced Elbow Expansion Joints

36" Pressure Balanced Elbow Expansion Joints

36" Pressure Balanced Elbow Expansion Joints

U.S. Bellows, Inc. designed and fabricated 36″ pressure balanced elbow expansion joints that weigh approximately 4,300 lbs each. The pressure balanced design does not exert pressure thrust on the equipment in the piping system.

36" Pressure Balanced Elbow Expansion Joints

36" Pressure Balanced Elbow Expansion Joints

The expansion joints are designed with Inconel® 625 grade LCF bellows and include a liner provided with drain holes to prevent accumulation of corrosive condensation. The design movements are 1/2″ axial compression and 3/4″ lateral movement. The bellows were 100% x-rayed before forming and dye-penetrant examined after forming.

Refurbishment of the Second of Two 54" Pressure Balanced Elbow Turbine Crossover Expansion Joints for a Power Generation Plant

December 6th, 2006 Comments off
 

Refurbishement of the Second of Two 54" Pressure Balanced Elbow Turbine Crossover Expansion Joints for a Power Generation Plant

 

 

 

Refurbishment of the Second of Two 54" Pressure Balanced Elbow Turbine Crossover Expansion Joints for a Power Generation Plant

Refurbishment of the Second of Two 54" Pressure Balanced Elbow Turbine Crossover Expansion Joints for a Power Generation Plant

Refurbishment of the Second of Two 54" Pressure Balanced Elbow Turbine Crossover Expansion Joints for a Power Generation Plant

US Bellows, Inc. refurbished two pressure balanced elbow expansion joints for a power generation plant with a quick turnaround during outages.

Refurbishment of the Second of Two 54" Pressure Balanced Elbow Turbine Crossover Expansion Joints for a Power Generation Plant

Refurbishment of the Second of Two 54" Pressure Balanced Elbow Turbine Crossover Expansion Joints for a Power Generation Plant

The first 54″ outside diameter expansion joint leaked from a crack in the bellows causing an unscheduled power plant outage. This particular expansion joint was fabricated for a high pressure turbine crossover piping for steam service of 97 PSIG at 634°F. The 27′ long, 27,000 lb. expansion joint was refurbished in less than 4 weeks. This was made possible by utilizing dedicated employees working overtime 6 days a week. The 321 stainless steel bellows and carbon steel root rings were replaced. The outside cover bolts were removed and new bolts were installed.

The second expansion joint was also for a high pressure turbine that was replaced during a planned outage. This expansion joint came in on October 30, 2006 and was ready to ship November 20, 2006. Overall length and center line to center line length were maintained to ensure easy installation. Both expansion joints were dye-penetrant tested and hydro-tested at 146 PSIG.

Three Elbow Pressure Balanced Expansion Joints for a Power Station in Canada

July 26th, 2002 Comments off
Three Elbow Pressure Balanced Expansion Joints for a Power Station in Canada

Three Elbow Pressure Balanced Expansion Joints for a Power Station in Canada

U.S Bellows, Inc, the expansion joint division of Piping Technology & Products, Inc., recently designed and fabricated three elbow pressure balanced expansion joints for a power station in Canada.

These joints are designed at 150 PSIG and 450ºF to allow lateral and axial movements in a 42″ steam line. Expansion joints were designed and fabricated per EJMA and B31.1 code. The expansion joints were hydro-tested at 225 PSIG and 75ºF. In order to detect any leaks in the weld, prior to and following forming, bellows long seam welds and attachment welds were 100% dye-penetrant tested.

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