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Example 1 
Case of “A” Chemical Company

JPI operates and manages work in a creative manner, as meticulously planned, backed by abundant experience and exerting superb technologies

  • Outline
  • Shortening of Term of Work Using the Dress-up Method

Outline

The existing tower, whose wall thickness was found lessened with age, was removed and replaced with a new one, in which new trays were installed and part of the existing piping was renewed.

Removal of the existing tower:
Quantity: 1
Height: 30 meters
Weight: 130 tons
Removal of existing internals, platform, accessories and hot insulation was involved.
Installation of a new tower:
Quantity: 1
Height: 30 meters
Weight: 100 tons
Installation of a platform, accessories, hot insulation, and Sulzer's 38 trays (as internals) was involved.

Shortening of Term of Work Using the Dress-up Method

Because of the short term of work, JPI planned to remove the existing tower without detaching the internals, the platform, the accessories and the hot insulation, meaning that the existing lifting lugs were not strong enough to lift them all together. JPI then conducted strength calculations and manufactured a newly designed stronger lifting lugs and removed them all simultaneously.
To install a new tower, JPI applied the dress-up method, by which piping, a platform, ladders and hot insulation were installed before the new tower, thereby reducing work that was carried out after the new tower was installed. A 650-ton crawler crane was used.
Having closely studied work procedures at the planning stage, JPI successfully completed the tower replacement work without any troubles.

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