SUB-COMMITTEE ON BULK LIQUIDS AND GASES - 4th session
Agenda item 17
ANY OTHER BUSINESS
Items of Mutual Interest to IMO/BLG and ISO
Submitted by the International Organization for Standardization (ISO)
SUMMARY
Excutive summary: This document provides updates on the development of ISO/DIS 15364 "Ships and marine technology - Pressure/vacuum valves for cargo tanks."
Action to be taken: Note the progress of ISO/DIS 15364
Related documents: MSC/Circ.677 "Revised Standards for the Design Testing and Locating of Devices to Prevent the Passage of Flame into Cargo Tanks in Tankers"
ISO standard 15364 on pressure/vacuum valves has been under development by the ISO Technical Committee on Ships and Marine Technology, Subcommittee on Piping and Machinery (ISO/TC 8/SC 3) since 1995. The standard provides minimum requirements for performance and testing of pressure-vacuum relief valves, with emphasis on selection of materials, internal finish and surface requirements, on cargo tanks in tankers. Design and inservice performance criteria and operational testing and maintenance requirements are also addressed. The standard does not address the passage of flame as this area is covered in MSC Circular 677 "Revised Standards for the Design, Testing and Locating of Devices to Prevent the Passage of Flame into Cargo Tanks in Tankers."
The standard has progressed to the stage of Draft International Standard (DIS) and could be published as early as May 1999 if approval is received from all member bodies without recommended changes. Otherwise, the standard will be balloted as a Final Draft International Standard (FDIS) by October 1999, with publication date of February 2000. Therefore, though the standard will not be available in final form by BLG 4, it should have reached a stage where substantive amendments are extremely unlikely and it could be considered a credible reference for discussions on revision to MSC/Circ.677.
Action requested of the Sub-Committee
The Sub-Committee is invited to note the continued progress of work on this draft ISO standard when considering revision to MSC/Circ.677.
