Standard Practice for Sandwich Plate Repair of Steel Structures

This standard covers the methodology and guidelines for accomplishing structural repairs by using steel sandwich plate technology. It is mainly applied to steel structure repairs for damages from corrosion deterioration and mechanical damages. It can also be applied to repairs of aluminum structures.

This standard includes assessment, design, qualification, installation, and inspection of the repairs using steel sandwich plate technology.

This standard does not cover use of fiber reinforced plastics (FRP). The repair materials used include steel plates as face plates and elastomer as a core material.

The steel sandwich plate repair technology provides an alternative to traditional hot work renewal repairs, especially where hot work is considered risky to the unit’s operation. The steel sandwich plate repair technology can be used to reinstate the integrity of the structure by utilizing a new steel plate bonded to the degraded existing steel structure using a core elastomer material. Figure 1 provides a schematic representation of a damaged structure repaired using sandwich plate. This sandwich plate repair method can also be used for modification or upgrading of the existing structures for reinforcement.