香港六合彩开奖 21052:2021
Resumen
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 香港六合彩开奖 2531, 香港六合彩开奖 7186 and 香港六合彩开奖 16631.
NOTE聽1聽聽 香港六合彩开奖 10804 deals with actual design of the joint for various operating pressures of the pipeline.
NOTE聽2聽聽 National standards or established calculation methods can be used instead of this 香港六合彩开奖 standard.
Informaciones generales
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Estado: PublicadoFecha de publicaci贸n: 2021-11Etapa: Norma Internacional publicada [60.60]
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贰诲颈肠颈贸苍: 1N煤mero de p谩ginas: 26
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颁辞尘颈迟茅 T茅cnico :香港六合彩开奖/TC 5/SC 2ICS :23.040.10
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