[School Facilities] Underground Beam Sleeve: Power Cable Entry _ Sound Waterproofing

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basic information

<Specifications> ●Waterproof performance and test value (smooth inner pipe) 0.1MPa × 72 hours (This product does not guarantee complete waterproofing.) ●Composition ・Sleeve material: Rigid polyvinyl chloride pipe (JIS K 6741) VU or VP ・Sleeve penetration pipe: Underground buried electric wire protection pipe, Furukawa Electric Co., Ltd. E-flex (or flame-retardant E-flex) ・Sealing material: Curing waterproof material filled in 2 locations ↓↓↓↓↓↓■Why is the waterproof performance of the pipe-in-sleeve set to "3 days"?■↓↓↓↓↓↓ ◆Municipalities state that "the flooding depth due to floods is 1 to 3 meters, and the duration of flooding is generally half a day to 1 day, but it may be 1 to 3 days depending on the location." ◆Emergency power supply systems in hospitals and similar facilities are recommended to operate continuously for "more than 72 hours (3 days)" according to laws and guidelines. ◆The time until the restoration of lifelines and the supply system for relief supplies during a disaster is assumed to be 72 hours. ◆Time limit for rescue activities: The time when the survival rate sharply decreases for rescues from collapsed buildings is within "72 hours (the golden 72 hours)."

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Applications/Examples of results

* R2.6 Publication of the National Transportation and Infrastructure Bureau "Guidelines for Flood Prevention Measures for Electrical Equipment in Buildings" * R3.4 (Public Foundation) Japan Sewerage New Technology Organization "Promotion of Waterproofing (Final Version)" The adoption of ●● cast iron pipes is rapidly increasing in the related construction work! <Public Works / Adoption Record Excerpts> (Statistics from January to June 2026) - Osaka Prefecture ●● City) Construction of communication facilities, etc., due to expansion - Shizuoka Prefecture ●● City) Electrical equipment construction for the ●● District Center in fiscal year 7 - Kyoto Prefecture ●● City) Electrical equipment construction related to the new building of ●● City Hospital (Section 1) - Kanagawa Prefecture ●● City) Electrical equipment construction for the expansion of ●● Elementary School - ●● Prefecture Civil Engineering Department Maintenance Division) Electrical equipment construction for the new construction of (tentative name) ●● Special Support School - Aichi Prefecture ●● City) Integrated redevelopment project for ●● City School Lunch Center (For other achievements, please download the separate adoption record table) Due to the recent shortage of construction workers and skilled labor, there are materials and methods that allow for "easy construction," but some overlook waterproof performance, leading to an increasing trend in water leakage problems at power supply entry points in recent years. To prevent water leakage accidents from resulting in large-scale repair work later on, we advocate for the adoption of pipe-in-sleeve systems that combine both "labor-saving at construction sites" and "the soundness of waterproof performance in buildings."

Detailed information

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  Underground outer wall section

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  PIS setup

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  PIS setup

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  After the installation

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  Chopping

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  Chopping through.

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  Connection Work 1

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  Connection work 2

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  Connection complete.

Line up（16）