Butt end type with mild steel band is commonly used for storm water application. The mild steel band serves to prevent lateral displacement if pipe joint during pipe jacking.
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Socketed in-wall rubber ring type is normally used for sewer and pressure pipe situation and for pipe size exceeding 1200mm in diameter. The rubber ring is designed to provide a seal to pipe joint to ensure water tightness, which is essential in sewage pipelines.
This question is taken from book named – A Self Learning Manual – Mastering Different Fields of Civil Engineering Works (VC-Q-A-Method) by Vincent T. H. CHU.
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