Active standard | Published: 01/12/2020

ISO 23467:2020

Ice plug isolation of piping in nuclear power plant
(Mise en ouvre de la technique d’obturation cryogénique sur les tuyauteries de centrales nucléaires)

Available languages: English

Available design: electronic design (pdf), Print design

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Detail information

Designation: ISO 23467:2020

Publication date: 01/12/2020

Pages: 15

Country: International technical standard

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Anotation

Description / Abstract: This document specifies requirements for the ice plug technique with liquid nitrogen or dry ice as refrigerant (cryogenic medium) on metal pipes of nuclear power plants. The freezing liquid can be water or water mixture (e.g. boric acid mixture). This document specifies technical requirements of ice plug generation, formation judgment and removal, measures before, during and after ice plugging and requirements for personnel and non-destructive testing. The application of the ice plug isolation technique is principally not allowed on cladded pipes or pipes with internal coatings. The application for pressure test is not in the scope of this document and will be qualified separately.

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