ISO 15364:2021 Ships and marine technology — Pressure-vacuum valves for cargo tanks and devices to prevent the passage of flame into cargo tanks

标准简介

Ships and marine technology — Pressure-vacuum valves for cargo tanks and devices to prevent the passage of flame into cargo tanks由ISO于2021-02-12发布，适用于国际范围。

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INTERNATIONAL STANDARD ISO 15364:2021

Ships and marine technology — Pressure-vacuum valves for cargo tanks and devices to prevent the passage of flame into cargo tanks

1 Scope

This document is applicable to pressure-vacuum valves and to devices to prevent the passage of flame, both protecting cargo tanks, that can be subject to explosive gas/vapour and/or to gas/vapour pressure or vacuum beyond the design parameters of the system/tank. It specifies the minimum requirements for performance and testing. It also specifies design and in-service performance criteria, operational testing and maintenance requirements. Design or manufacturing in accordance with this document does not imply suitability for any given installation, it indicates that certain minimum requirements have been considered and that information necessary for determination of suitability is provided to the buyer of the equipment.

The flame test procedures of ISO 16852:2016 are incorporated in this document.

NOTE Minimum requirements for devices to prevent the passage of flame are found in the International Maritime Organization (IMO) “International Convention for the Safety of Life at Sea, as amended” (SOLAS), Chapter II-2, Regulation 4, and IMO Maritime Safety Committee (MSC) Circular No. 677 (MSC/Circ. 677), “Revised Standards for the Design, Testing and Locating of Devices to Prevent the Passage of Flame into Cargo Tanks in Tankers”, as amended.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

ISO 16852:2016, Flame arresters — Performance requirements, test methods and limits for use

International Maritime Organization. Maritime Safety Committee circular 677 (MSC/Circ. 677), Revised Standards for the Design, Testing and Locating of Devices to Prevent the Passage of Flame into Cargo Tanks in Tankers, as amended by IMO MSC/Circ. 1009 and MSC/Circ. 1324

3 Terms and definitions

For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https://www.iso.org/obp

— IEC Electropedia: available at http://www.electropedia.org/

3.1

flame arrester

device fitted to the opening of an enclosure, or to the connecting pipe work of a system of enclosures, and whose intended function is to allow flow but to prevent the transmission of flame

ISO 15364:2021

3.2

dual nozzle valve

pressure relief valve that features two high velocity vents with different opening settings integrated into one valve, the flow characteristics of which can be of one or more of the designs full opening valve (3.3), modulating valve (3.7) or transition point valve (3.11)

3.3

full opening valve

design that opens fully at maximum 2 % above the set pressure

3.4

high velocity vent valve

pressure relief valve designed always to have efflux velocities that prevent the flame propagation against the flow direction

3.5

maximum experimental safe gap

MESG

maximum gap of a joint of 25 mm in width which prevents any transmission of an explosion during tests

Note 1 to entry: ISO/IEC 80079-20-1 specifies the test apparatus and the test method.

3.6

maximum intended pressure drop

largest pressure drop generated over a device for which the test laboratory verifies the corresponding flow capacity

3.7

modulating valve

design that opens proportionally with rise in pressure

3.8

pressure-vacuum valve

device to relieve the pressure or vacuum formed inside the cargo tanks by opening the valves at the designated setting value to protect the tank from over-pressure or vacuum exceeding the design parameters of the tanks

3.9

standard conditions

dry air at 288,15 K (15,00 °C; 59,00 °F) and 101,325 kPa

3.10

third party inspection body

organization independent from the manufacturer and user, that is qualified to perform or witness the tests and inspections

3.11

transition point valve

design where the valve characteristics change from modulating to full opening at a particular pressure

3.12

verified drawing

drawing certified to be authentic and complete by the third party inspection body (3.10) issuing the test report

3.13

verified flow chart

pressure versus flow volume presented in a chart certified by the third party inspection body (3.10) issuing the test report

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