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  • BSI
    21/30368980 DC BS ISO 21052. Restrained joint systems for ductile iron pipelines. Calculation rules for lengths to be restrained
    Edition: 2021
    $42.22
    / user per year

Description of 21/30368980 DC 2021

This document offers a method of computing the lengths of the pipe that must be restrained on each side (one side in case of Dead end) of the point of application of the thrust force.

The objective in designing a restrained joint thrust restraint system is to determine the length of pipe that must be restrained on each side of the focus of a thrust force. This method takes into account the outside diameter of the pipe, the design internal 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 may also be considered to determine the restraining length using any appropriate method.

All types of restrained joint systems, with their operating pressure ratings of ductile iron pipelines complying with ISO 2531, ISO 7186 and ISO 16631 have been considered suitable for this method of computing.

NOTE 1

ISO 10804 Restrained joint systems for ductile iron pipelines - Design rules and type testing, deals with actual design of the joint for various operating pressures of the pipeline.

NOTE 2

National standards or established calculation methods may be used instead of this ISO standard by agreement between the manufacturer and the designer/customer.



Standard Number21/30368980 DC
TitleBS ISO 21052. Restrained joint systems for ductile iron pipelines. Calculation rules for lengths to be restrained
StatusDefinitive
Publication Date2021-01-05
Identical National Standard OfISO/DIS 21052
DescriptorsMechanical components, Joints, Pipelines, Cast-iron pipelines, Calculations (mathematics)
ICS23.040.10 Iron and steel pipes
CommitteePSE/10
PublisherBSI
Pages33

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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