The Evolution of Jointing Vitrified Clay Pipeby Jack Evans, Gladding, McBean & Co, Oakland, CA, USA,
Marlene N. Spence, Gladding, McBean & Co, Oakland, CA, USA,
Document Type: Proceeding Paper
Part of: Advances in Underground Pipeline Engineering
Advances made in the jointing of vitrified clay pipe during the last half century, illustrate the concern of the clay pipe industry to provide top quality jointing methods. Early 19th century clay pipe jointing often utilized a field applied cement mortar, or other specialty jointing materials. The need to replace rigid joints to provide a degree of flexibility in the pipe system caused a variety of flexible materials such as tars and mastics to come into use. However, they were not always successful in eliminating infiltration/exfiltration problems. The development of polymers yielded a broad variety of new materials applicable for use in jointing vitrified clay pipe. Today the clay pipe industry offers choices of many excellent jointing methods. Factory applied compression joints adhere to strict performance standards. The introduction of low profile plain end pipe led to the development of additional jointing alternatives.
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