December — 2006 — The Expansion Joints Blog

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Archive for December, 2006

Single Tied Metallic Expansion Joints with Two-Ply Alloy Bellows

December 27th, 2006 Comments off
Single Tied Metallic Expansion Joints with Two-Ply Alloy Bellows

Single Tied Metallic Expansion Joints with Two-Ply Alloy Bellows

Single Tied Metallic Expansion Joints with Two-Ply Alloy Bellows

Single Tied Metallic Expansion Joints with Two-Ply Alloy Bellows

Design Conditions:
- Pressure: 243 PSIG
- Temperature: 108°F
- Axial Compression: 0.020″
- Lateral Movement: 0.200″
- Axial Spring Rate: 13,320 lb/in
- Lateral Spring Rate: 121,202 lb/in

Details:
- Left: 24″ Diameter, Right: 32″ Diameter
- 100% X-Rayed Bellows and Flanges
- 100% Dye-Penetrant Tested

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.

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