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海事コンプライアンス 11項目

Inert Gas System and Tank Atmosphere Inspection

このチェックリストは英語版です。

Checks the inert gas system, tank atmosphere control, and safety devices on tankers under SOLAS Chapter II-2 and industry guidance.

SOLASISGOTT

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IG Plant and Gas Quality

  • Is the inert gas system capable of delivering gas with oxygen content not exceeding 5% by volume? *
  • Are the scrubber, blowers, and cooling arrangements operating correctly? *
  • Enter the oxygen content of delivered inert gas at the point of supply (% by volume).

Safety Devices and Non-Return Arrangements

  • Is the deck water seal (or equivalent non-return device) functioning to prevent back-flow of hydrocarbon gas? *
  • Is the deck (P/V) mechanical breaker charged and at the correct level? *
  • Are non-return valves and isolating arrangements between IG main and cargo tanks operational? *

Alarms and Instrumentation

  • Are oxygen and pressure alarms/trips for the IG system tested and functional? *
  • Are fixed and portable oxygen and hydrocarbon gas measuring instruments calibrated and available? *

Tank Atmosphere Control

  • Are cargo tanks maintained in an inert condition (below 8% oxygen) during carriage and cargo operations as required? *
  • Are purging and gas-freeing operations conducted per approved procedures with atmosphere monitoring? *
  • Is positive pressure maintained in cargo tanks to prevent air ingress? *

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