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  • BSI
    BS ISO 21052:2021 Restrained joint systems for ductile iron pipelines. Calculation rules for lengths to be restrained
    Edition: 2022
    $418.55
    / user per year

Description of BS ISO 21052:2021 2022

This document specifies a computation method used to determine the length of the ductile iron pipes to be restrained, when used for conveying raw water, drinking water, sewerage under pressure.

This computation method takes into account all common pipeline route changes, including changes in the diameter of the pipeline itself and dead ends at the extremity of the pipeline, the outside diameter of the pipe, the system test pressure (to estimate the thrust), depth of cover, the characteristics of the soil surrounding the pipe and trench backfilling methods for a worldwide usage. The characteristics of the restrained joint are not covered by this document but can also be considered to determine the restraining length using any appropriate method.

The computation method defined in this document is applicable to all types of restrained joint systems, with their operating pressure ratings of ductile iron pipelines complying with ISO 2531 , ISO 7186 and ISO 16631 .

NOTE 1

ISO 10804 deals with actual design of the joint for various operating pressures of the pipeline.

NOTE 2

National standards or established calculation methods can be used instead of this ISO standard.



Standard NumberBS ISO 21052:2021
TitleRestrained joint systems for ductile iron pipelines. Calculation rules for lengths to be restrained
StatusDefinitive
Publication Date2022-04-01
Identical National Standard OfISO 21052
DescriptorsMechanical components, Joints, Pipelines, Cast-iron pipelines, Calculations (mathematics)
ICS23.040.10 Iron and steel pipes
CommitteePSE/10
ISBN978 0 580 51954 3
PublisherBSI
Pages34

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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