HM 50. Guidelines for the cleaning of tanks and lines for marine tank vessels carrying petroleum and refined products

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  • Published: May 2017
  • REF/ISBN: 9780852939826
  • Edition: 4th
  • Status: Current

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HM 50 coverThis publication provides guidance for the cleaning and washing of tanks on board petroleum tank vessels, particularly when carrying refined products and changing from one product to another. It is intended to assist with maintaining product quality through the use of minimum effective tank washing procedures.

Although this publication is written principally for sea-going ships, it may also be applied to inland barges. It addresses issues relating to most classes of refined product but does not cover chemicals or gases.

Instructions regarding washing are normally issued by the charterers or vessel owners either in the form of a specific instruction or a general tank cleaning guideline provided on board. This publication is intended to provide additional guidance to those involved with issuing such instructions and to other parties who may be involved in confirming that suitable procedures have been followed.

This fourth edition has dispensed with previous Tables 1, 2, and 3, moving their content into the main text. The cleaning table, now Table 1, has been significantly revised to reflect current good practice. The revisions include recommendations that acknowledge that enhanced stripping and drying may be an acceptable alternative to mopping. Some comments on inert gas systems were considered out of scope and have been removed.

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