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:] [9.] A manhole system for connecting service laterals to a main line pipe while maintaining dual containment in at least one dually contained mainline pipe terminating in the manhole, comprising:a closure piece coupled to the dually contained mainline pipe terminating in the m

[ What is claimed is:] [9.] A manhole system for connecting service laterals to a main line pipe while maintaining dual containment in at least one dually contained mainline pipe terminating in the manhole, comprising:a closure piece coupled to the dually contained mainline pipe terminating in the manhole; anda bellow fitting coupled to the closure piece in the manhole;the bellow fitting including means for coupling to the closure piece and including a flexible segment for maintaining integrity of the dual containment system in response to movement of any structure.