A secondary containment system for a primary pipe system having primary pipes connected by a connection point having a valve. The secondary containment system having longitudinally divided first and second shells larger than and disposed around the connection point of the primary pipes. Each shell having longitudinally extended edges on opposite sides and arcuate openings at opposite ends. A sealing gasket is provided having arcuate end portions connected by longitudinally extending strips. A series of removable clamps is used for clamping the edges of the first and second shells together, with the sealing gasket being sandwiched between the two shells. A valve stem adapter extends through one of the shells and is configured to rotate the valve in the primary piping system.

An apparatus is provided for protecting from freezing an above-ground conduit outlet on an exterior wall of a building, the freeze protection apparatus comprising a housing including a top wall, a front wall, and a pair of opposed side walls interconnecting the top wall and the front wall. The housing partially defines an enclosed area having a rear aperture and a bottom aperture. Thermal insulating material lines the interior surface of the walls of the housing. Means are provided for mounting the housing to the exterior wall adjacent the conduit outlet. The inner edges of the side walls and the top wall contact the exterior wall and the bottom edges of the side walls and the front wall contact the ground for enclosing the conduit outlet. Heat is retained within the housing to prevent fluid within the conduit from freezing.

A heat-insulated box for insulating parallel-slide valves includes multiple sections each including an outer protective steel envelope with a heat insulation coating on an inner surface. A number and configuration of sections is determined based on geometric parameters of the insulated valve. Some sections include two semi-cylindrical segments rigidly coupled together and oriented in mutually perpendicular directions such that one segment can be installed on the valve and one segment can be installed on the pipeline. The box also includes stiffeners at the junction of the two semi-cylindrical segments. The sections include shock-absorbing sealing gaskets made of cellular rubber substance to ensure a tight seal of the box. The box includes a locking mechanism for coupling the sections together.

A heat insulating structure for an exhaust junction pipe to be disposed in an area in which exhaust gas passages having different respective lengths are merged together comprises a first heat insulation portion that covers and provides heat insulation for at least a portion of one branch part of branch parts that are branched in the exhaust junction pipe; the one branch part forms one exhaust gas passage in a not-yet-merged state of the exhaust gas passages, and forms the one exhaust gas passage having a short length.

A secondary containment system for a primary pipe system having primary pipes connected by a connection point having a valve. The secondary containment system having longitudinally divided first and second shells larger than and disposed around the connection point of the primary pipes. Each shell having longitudinally extended edges on opposite sides and arcuate openings at opposite ends. A sealing gasket is provided having arcuate end portions connected by longitudinally extending strips. A series of removable clamps is used for clamping the edges of the first and second shells together, with the sealing gasket being sandwiched between the two shells. A valve stem adapter extends through one of the shells and is configured to rotate the valve in the primary piping system.

An insulating cover for assemblies including pipe elements, pipe couplings, elbows, Tees and valves also acts as a vapor barrier. Cover portions are joined along a seam which provides for a continuous seal between both the cover portions and the pipe elements which extend through channels defined in the cover. The seam includes a furrow into which sealant is forced when the cover portions are joined around the assembly. The furrow is defined by an asymmetric tongue and groove joint. Canals in the channels, in communication with the grooves, also receive the sealant to provide the continuous seal.

The invention relates to a method of fabricating an insulation element (2) as an insulation box, cap or cover for a valve, a flange or a fitting insulation within a piping system of a technical building equipment. Said method comprising the steps of forming a block of insulating material to be provided with a cavity having a contour of the valve, the flange or the fitting insulation and an outer contour, whereby the block is divided into at least two parts, preferably two halves (3) of the insulation box, cap or cover, and forming a complementary insulating covering (6) having an inner contour according to the outer contour of the block. To provide a method of fabricating the insulation element (2) having increased properties in view of combustibility and being cost saving because of an easy and less complex method for manufacturing insulation elements (2) which can be used at least for a range of valves, flanges or fitting insulations within a piping system of a technical building equipment having different sizes and/or outer contours the insulation element (2) and the complementary insulating covering (6) are produced separately from each other and joined together, whereby the block is produced from mineral wool, i.e. mineral fibers bound with a binding agent, and the complementary insulating covering (6) is produced from a plastically deformable material being mechanically pressed or molded to be provided with the inner contour corresponding to the outer contour of the block provided with the cavity.

A pressure regulator for fluids is described. The pressure regulator (100) has a main body (108) including a control valve (112,113) actuated by a control element (119) responding to a pressure signal generated by sensor means (118) to maintain a set pressure in the transfer line. The main body (108), the control valve (112,113), the control element (119) and the sensor means (118) are contained in an interior space (124) enclosed by a housing (123). A pressure below atmospheric pressure prevails in the interior space (124).