ISO 20854:2019 热容器 使用易燃制冷剂制冷系统的安全标准 设计和操作要求

标准编号：ISO 20854:2019

中文名称：热容器 使用易燃制冷剂制冷系统的安全标准 设计和操作要求

英文名称：Thermal containers — Safety standard for refrigerating systems using flammable refrigerants — Requirements for design and operation

发布日期：2019-10

标准范围

This document describes the design of the mechanical refrigeration unit (MRU) and operation of 
container refrigerating systems in all anticipated operational modes and locations.
It describes the industry's best practices for the safe operation of flammable refrigerants in refrigerating 
systems used in thermal freight containers operated on board ships, in terminals, on road, on rail and 
on land.
This document addresses the use of flammable refrigerants with classifications defined in ISO 817, 
defined as 2L, 2 and 3, except R717 (Ammonia). 
This document describes an operational mode risk assessment (OMRA) which uses methods such as 
HAZOP (Hazard and operability analysis), FMEA (Failure mode and effects analysis), or FTA (Fault tree 
analysis) or combination of methods.
This document specifies requirements for the validation and consideration of possible safety concepts 
and protective devices within the OMRA process, including charge release tests, simulation, and 
function tests of the associated protective equipment. It defines test requirements for shock, impact, 
and vibration. A validation procedure is given to demonstrate that risks from hazardous events are 
investigated and their severity and frequency are meaningfully reduced, with the aim of achieving 
tolerable risk values.
The obligations of the manufacturer, the container owner as well as the responsible operator are 
described, as well as how stakeholders can investigate and mitigate risks associated with the use of 
flammable refrigerants.
Finally, this document describes the requirements of service and maintenance when working with 
flammable refrigerants.
This document is restricted to refrigerating systems integrated with or mounted on ISO thermal 
containers according to ISO 1496-2. It provides minimum requirements for reducing the risk associated 
with the use of flammable refrigerants.
The scope is limited to container refrigerating systems operated in conjunction with the carriage of 
refrigerated cargo as operating reefer (OR) or when used as a non-operating reefer (NOR) or when 
empty for positioning — while in intermodal transit. Static land-based continuous operations are 
excluded.

标准预览图