October — 2011 — The Expansion Joints Blog

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Archive for October, 2011

Do you have a plant turnaround coming up?

October 24th, 2011 Comments off

Do you have a plant turnaround scheduled or planning one in the near future? PT&P is prepared to be there for you throughout the entire process. From planning, to execution, and follow-up, we have what it takes to accomplish a successful plant turnaround.

Prior to Your Turnaround:
- Call our field service team to assist with plant walk-downs to assess your plant for maintenance, repair or replacement of pipe supports and expansion joints
- Contact our quotations department for immediate pricing on pipe supports, expansion joints, or auxiliary steel needed during the turnaround.
- Consult our experienced engineers for guidance on support placement, materials, finishes, etc. to ensure optimum life of the supports.

During Your Turnaround:
- Use our field service team to guide you through installation, start-up, and replacement to safely and efficiently handle your turnaround.
- For quick delivery, PT&P stocks over 1500 bellows, over 100,000 lb. of insulation materials, over 30,000 spring coils, and over 1 million pounds of standard items

Post Turnaround:
- Receive training to monitor the supports, and identify potential failure, in order to prevent unplanned turnarounds in the future.
- Learn correct size and selection of pipe supports and expansion joints per application for any post-turnaround resolutions.
- Call on our field service team to develop a data book of existing pipe supports and expansion joints and their conditions in order to identify potential maintenance issues in upcoming turnarounds.

Examples:

Metallic Expansion Joint Refurbished in 2 Days

Metallic Expansion Joint Refurbished in 2 Days

A rectangular metal expansion joint was refurbished  on an emergency   basis for a local chemical plant. Upon arrival, it was acid washed and   dye-penetrant examined for any cracks.  View the full Article.

Refurbishment of 54" Pressure Balanced Elbow Turbine Crossover Expansion Joints

Refurbishment of 54" Pressure Balanced Elbow Turbine Crossover Expansion Joints

U.S.   Bellows, Inc. refurbished two pressure balanced elbow expansion joints with a quick turnaround for a power generation plant during outages.   They are designed for high pressure turbine crossover piping. The first 54″ outside diameter expansion joint leaked from a crack in the bellows   causing an unscheduled outage.  View the full article.

4" Single Expansion Joint

4" Single Expansion Joint

This expansion joint was received in the morning and shipped to the customer the very same day. The bellows, liner and cover were replaced and the carbon steel parts were sand blasted, cleaned and painted. A dye-penetrant test and hydro-test to 518 PSIG were performed prior to shipment. View the full article.

Same Day Turnaround Service on an 8" Single Expansion Joint

Same Day Turnaround Service on an 8" Single Expansion Joint

This expansion joint was received in the morning, refurbished by adding new bellows and limit rods, and then shipped the very same day. New 321 stainless steel bellows were fabricated and the existing flanges were reused by sandblasting and then painting for corrosion protection. View the full article.

A Custom Spring Support Was Designed Using a Metal Bellows Instead of a Spring Coil

October 17th, 2011 Comments off

A Custom Spring Support Was Designed Using A Metal Bellows Instead Of A Spring Coil

A custom spring support was designed using a metal bellows instead of a spring coil. The bellows was fabricated from stainless steel, because it will be used in a highly corrosive, off-shore environment. By utilizing the metallic bellows, it was much easier to customize for a short run production, produce variations of spring rate, and develop a high load-carrying capacity. An added benefit of using the bellows instead of a custom coil was that it reduced fabrication time by half. The rolled plate shown on the left is welded to the structural pipe on the platform and a riser clamp was attached on the right.

16″ Diameter Externally Pressurized Expansion Joints for an Oil Refinery

October 10th, 2011 Comments off

16" Diameter Externally Pressurized Expansion Joints

These externally pressurized expansion joints are 16″ in diameter and 60-1/4″ face-to-face. The bellows are fabricated from 304 stainless steel, and the rest of the expansion joint is fabricated from carbon steel. They are custom designed for 8″ axial movement and 150 psig at 176°F, with a spring rate of 2,152 lb./in. Each expansion joint was hydro-tested, radiographic tested, and dye penetrant tested prior to shipment.

High Temperature Furnace Seal Bags

October 3rd, 2011 Comments off

High Temperature Furnace Seal Bags

Openings between the floor of the furnace and the pipe penetration openings can cause heat energy loss in certain types of furnace applications. A penetration bag type seal is now available to prevent energy loss through the pipe penetrations during the expansion and contraction movement of the pipe through the furnace floor. The use of a furnace seal bag permits movements of the pipe through the furnace floor while providing an airtight closure to prevent heat loss.

 

A furnace seal bag works similar to a fabric expansion joint. The bag consists of multiple layers of flexible flame and heat resistant, impervious fabric designed to operate from start up to high temperature design conditions. The bag contracts and expands with varying furnace temperatures. The seal bag allows thermal expansion and prevents the loss of heat through the furnace floor which conserves energy and reduces the cost of energy.  Vew Full Article

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