San Diego State, Steam Repairs

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  • High-quality design relieves SDSU’s high-pressure steam infrastructure

  • Project Overview

    SDSU’s 50-year-old underground steam piping and manholes needed some work. Needing help to let off some steam, they called P2S to design the replacement of half a mile of underground piping, 15 new manholes and thermal stress modeling on all buried and above ground utilidor installations. Extensive surveying and renovations brought the half-century old infrastructure up to modern standards. This $17.7 million project was constructed over three phases in as many years. Our overall design ensures seamless high pressure steam distribution throughout SDSU underground utilities.

  • Solution

    The first phase of the project included the renovation of two steam manholes and the replacement of five steam manholes. Approximately 1,100 feet of 50-year old steam piping and condensate return were replaced and concrete piping utilidors were renovated or replaced. We also provided ASME B31.1 stress modeling on all replaced sections of the distribution to provide proper design for anchoring and guide support. This phase was constructed in 2013.

    During the project’s second phase we renovated five steam manholes and replaced of one. We replaced 1,400 feet more of half-century old steam piping and we also renovated or replaced condensate return concrete. We ASME B31.1 stress modeling on all replaced sections of the distribution to provide proper design for anchoring and guide support. This phase of the project was constructed in 2013-14.

    The final phase of the project included manholes that were 12 replaced with larger manholes. We replaced the piping in the manholes and utilidors with an engineered system complete with supports, anchors and guides. Our scope also included trenching between the steam manholes and surface repair of the hardscape and landscape. We also replaced the over 40-year-old concrete lids with new utilidor lids. We also incorporated welded HDPE jackets and leak detection systems in the design to ensure system longevity. The final phase was constructed in 2014-15.