Abstract:
A casing member for forming a connection between two tubular sections, said casing member having a first, cross-linked, heat shrinkable plastic layer, and a second, inner, non-crosslinked (or less cross-linked) layer. The casing member also has an electrically heatable member spaced inwardly from the first layer, for fusion bonding the second layer to the tubular sections.
Abstract:
Foam filling a cavity in a joint between insulated pipe lengths by wrapping a fibre reinforced plastic mold sheet around the cavity or applying a casing around the cavity, with a securing element supplied on the mold sheet to resist separating movements of the ends of the mold sheet or one or more flexible tensile members wrapped around the casing, to resist ballooning of the casing on expansion of a foam filling introduced into the mold or into the casing.
Abstract:
An induction heating apparatus for use in pre-heating pipe joints. The induction heating apparatus comprises a frame for applying around the pipe joint, and an induction heating coil made from Litz cable wires.
Abstract:
A method for forming a connection between two tubular sections having a polymeric outer surface jacket, using induction heat to fusion bond a casing of similar, non-crosslinked polymer to the outer surface of the tubular sections. Casing with a configuration capable of such fusion bonding.