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Piece Method

Shinko Plantech developed our proprietary Piece Method to shorten work times, reduce costs, and ensure a high degree of safety.

Piece Method — Changing the Exterior Base Plate (Annular Plate)

Our proprietary Piece Method addresses corrosion, aging and differential settlement issues involving existing large tanks. The method has become widely recognized as an innovative means of repairing large storage tanks and was awarded with The Japan Petroleum Institute Award for Technological Progress in May 1982. Over the years, the method has established a solid track record across Japan.

Conventionally the Jack-Up Method was widely used to hoist the tank side wall when work was required to replace the entire circumference of the base plate and annular plate on a large storage tanks. The Piece Method represents a unique technique that uses a support piece to bolster the bottom of the tank's side wall, without the need for a jack. This method simplifies the entire work process, which in turn greatly reduces overhead expenses, shortens work times and ensures high levels of safety.

Tank Repair Procedure Using the Piece Method

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Advantages

  • Repetition of simple work processes greatly shortens work time and reduces expenses compared to the Jack-Up Method.
  • Ensures high degree of safety as it retains the existing position of the tank and uses numerous support points for the tank side wall, including support pieces and guide pieces.
  • Replacing only the annular plate is a highly efficient process as it does not require removal of heating coils or openings in the side wall or tank roof.
  • No damage is done to the foundation slope, as work is performed inside the tank only. In addition, ring wall installation can be performed at the same time.
  • Other small foundation adjustment work or replacement of base plates can be done at the same time.
  • Secures the safety of the tank body by minimizing stress occurring on the side wall during the work process.

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