ISO 12241-2022

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Thermal insulation for building

equipment and industrial

installations — Calculation rules

Isolation thermique des équipements de bâtiments et des installations

industrielles — Méthodes de calcul

INTERNATIONAL

STANDARD

ISO

12241

Third edition

2022-06

Reference number

ISO 12241:2022(E)

Corrected version

2022-11

ISO 12241:2022(E)



















Website: www.iso.org



ISO 12241:2022(E)

Foreword ........................................................................................................................................................................................................................................ iv

Introduction .................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ..................................................................................................................................................................................... 1

  .......................................................................................................................................................... 1

  ...................................................................................................................................................................... 1

  ......................................................................................................................................................................................................... 1

3.3 Subscripts .................................................................................................................................................................................................... 3

4 Calculation rules and formulae of heat transfer ................................................................................................................ 4

  ........................................................................................................................ 4

  ........................................................................................................................................................................................ 4

  ........................................................................................................................................................ 4

  .................................................................................................................... 

  ................................................................................................................................... 16

  ............................................................................................................................................. 16

  ..................................................................................................................................................................... 

 ......................................................................................................... 

  ............................................................................................ 

  ..................................................................................................................................................................................... 

  ............................................................................................. 

  ............................................................................................................. 

  ..................................... 20

  ...................................................................................................................................................................... 20

  ................................................................................................................................. 21

5 Calculation of the temperature change in pipes, vessels, and containers ........................................... 22

  ........................................................................................................................................... ............................................................. 22

  .............................................................................................................. 23

  ..................................... 23

 .....................................................................24

  .................................... 24

  ............................................................................................. 25

7 Calculation of heat loss for underground pipelines ....................................................................................................26

  ........................................................................................................................................... ............................................................. 26

  ................................................................................................................................................... 26

  ............................................................................................................................................................. 26

  .................................................................................................................................................................... 

  .............................................................................................................................................................................................. 

Annex A  Thermal bridges ......................................................................................................................................................29

Annex B  Examples ..........................................................................................................................................................................43

 ........................................................................................................................................... .................................................................................. 52

iii

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标签： #ISO

摘要：

ISO 12241-2022 是国际标准化组织最新发布的关于工业装置与设备保温、保冷及防结露计算的标准规范，全称为《建筑设备和工业装置的热绝缘 – 绝热计算规则》。该标准为工程设计人员提供了统一的、基于国际共识的隔热层厚度与热损失计算方法，适用于管道、储罐、换热器及通风系统等各类工业与建筑应用场景。相比上一版，2022年更新版进一步明确了边界条件选取、环境参数设定及多工况下的校验步骤，提升了低温和高温绝热系统的计算精度。掌握 ISO 12241-2022 不仅有助于优化能耗管理、满足环保合规要求

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ISO 12241-2022

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