초록 ▼

A dual containment pipe system suitable for installation into an existing conduit includes a new secondary containment pipe with a plurality of substantially uniform internal studs and a new primary containment pipe up against the studs. An annular space is formed between the pipes by the studs whic

A dual containment pipe system suitable for installation into an existing conduit includes a new secondary containment pipe with a plurality of substantially uniform internal studs and a new primary containment pipe up against the studs. An annular space is formed between the pipes by the studs which provides space along the length of the conduit for installation of leak detection systems including cables or perforated conduits for removing liquids or purging the annulus. The impervious new primary containment pipe may be cured in place, folded and formed, diameter reduced pipe, or any other pipe suitable for pipeline rehabilitation. A manhole system for connection of service laterals to the main line pipe which maintaining dual containment utilizing closure pieces for the main line coupled to a bellow fitting and service lateral riser tee is also disclosed.

대표청구항 ▼

[ What is claimed is:] [10.] A method of installation of a dual containment pipe system into an existing conduit, comprisingplacing a substantially fluid impermeable secondary containment pipe having a plurality of internally facing substantially uniform studs in the existing conduit;configuring the

[ What is claimed is:] [10.] A method of installation of a dual containment pipe system into an existing conduit, comprisingplacing a substantially fluid impermeable secondary containment pipe having a plurality of internally facing substantially uniform studs in the existing conduit;configuring the secondary pipe to conform to the interior configuration of the existing conduit to form a secondary containment pipe;installing a primary containment pipe inside the secondary pipe up against the studs to form a substantially uniform space between the pipes; andfixing the new primary containment pipe to maintain its configuration against the studs with a substantially uniform annular space between the primary and secondary pipes.