摘要:
A clamp is provided to seal the gap between a pair of flanges (8) of connected sections of pipe (7) when a gasket (10) between the pipe sections fails. The sealing clamp comprises a pair of half-rings (1) incorporation rectangular grooves (3) which receive a lead sealing insert (4) formed with a tapered face (6) opposite that which is received in the groove (3). The half-rings (1) have terminal lugs bored to receive bolts by means of which the clamp can be tightened about the flanges (8), with the result that the insert (4) is distorted to form an effective annular seal for the gap between the flanges (8). The tapered face (6) ensures that the clamp is self-centering and that the clamp is not likely to be displaced sideways if subjected to an accidental blow. Pre-drilled holes (13) in the half-rings (1) can be continued through the insert (4) to enable a sealing compound to be injected.
摘要:
A pipe clamp device (1) comprising first (2) and second portions (3) connected together at a hinge (5). At least one portion is adapted to move pivotally around the hinge (5) relative to the other portion, the first (2) and second portions (3) being adapted to co-operate with one another to close around and at least partially encircle a pipe (p) to be clamped. The pipe clamp device (1) has securing members (6) to secure the first (2) and second portions (3) in a clamped arrangement around the pipe (p). The pipe clamp device (1) has a sealing mechanism configured to seal between one of the first (2) and second portions (3) and the pipe (p), wherein the sealing mechanism comprises first and second seal devices housed in respective recesses (7), (8), (9) and defining a sealed chamber between the recessed first and second seal devices. A settable fluid is injected into the sealed chamber between the first and second seal devices. A method of using the clamp device (1) is also disclosed.
摘要:
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.
摘要:
The present invention provides an apparatus for repairing the outer sheath of a pipe, said apparatus comprising a sleeve (12) adapted to surround the pipe, sealing means (16) for establishing atleast two circumferential seals between the surface of the pipe and means (17, 18) for forcing a sealing solution against the surface of the pipe between the two circumferential seals, the arrangement being such that in use the sleeve is spaced from the outer sheath of the pipe to form a sealed annulus therebetween and a method of repairing an outer sheath of a pipe, said method comprising the steps of mounting a sleeve over the pipe to provide an annulus therebetween, securing the sleeve in place around the pipe, providing two circumferential seals between the sleeve and the pipe and forcing a sealing solution against the surface of the pipe between the two circumferential seals to form a pressure seal between the circumferential seals and sealing the annulus between the pipe and the sleeve.
摘要:
A method for affecting a repair and/or strengthening of a pipe is disclosed. The method comprises cleaning an effected area of a surface of the pipe to provide a cleaned surface of the pipe surface for an area requiring repair; applying a continuous strip around the pipe from a portion prior to the effected area and allowing the continuous strip to extend to a portion after the effected area. The continuous strip forms a spiral sleeve spaced from the pipe surface to provide an annular chamber between the pipe surface and the spiral sleeve.
摘要:
The invention relates to a sleeve for repairing a fluid pipe (12), comprising a rigid or flexible shell (22) which forms a mould that surrounds at least one defective area (10) of the pipe. A liquid-state polymerisable material is injected into the aforementioned mould, which polymerises and seals the defective area. The sleeve also comprises an insert which is made up of a plurality of coils of a filiform element (14), which is wound into a helix around the defective area of the pipe, before the polymerisable material is injected or infused.