The construction is suitable for various pipeline systems
Insulation construction should pay attention to matters
Insulating materials for equipment and pipe insulation, construction should make no veneers adhered dry equipment and pipe surface. Horizontal pipe insulation, first in the top of the pipe surface paved with 10~30mm thick wool felt, width of 1/3 circumference, and then along the tube wall laying blanket, with galvanized iron wire ( or steel) binding, binding distance is 200~400mm, for welding with pin device, sewed felt is compressed into the design thickness of about 5mm pin outcrop, and a self-locking washer fasteners. To unfavorable welding pin device, usable steel banding. Distance 400~600mm, and that in the slit width direction is not less than two felt. In order to make the wool blanket construction density in 100~120kg/m3. Usually the blanket product density is 80~100kg/m3, the amount of compression of 20~10% construction.
Selection of casing insulation, the inner diameter of the casing should be consistent with the pipeline. During construction, open trocar incision part set in the pipeline, horizontal pipe insulation, incision in the side. The composite protective layer casing. Tear notch lap joint surface inside the protective paper, a joint press attached, and two adjacent sections of casing is tight, the gap with pressure-sensitive adhesive tape for bonding, without complex protective layer of shell and tube, galvanized iron wire bundle available, each section of tube bundle of 2-3.
Insulating materials for flat wall or surface fire insulation. The construction should be attached to the outer wall surface of the equipment, equipment insulation sheet ends cut into oblique mouth splice joints, usually adopt the dowel sleeve locking washer fixed. To unfavorable welding pin device, usable steel banding, but the corner with galvanized angle, spacing to ensure every 1000mm spacing.
When the insulation layer thickness of more than 80mm, shall be layered insulation. Multilayer insulation fault seam laying, layered strapping.
Equipment and piping support, hanger and flange, valve and manhole and other parts, in the overall insulation leave certain loading and unloading gap, to be integral insulation and protective layers after completion of construction, and then as a local heat treatment. And completed the construction of the insulation structure of the movable bracket sliding shall not interfere.
Flange, valve and into the bore insulation, should adopt the detachable metal shell insulation.
The metal protective layer
Before installation, metal plates on either side of first out of two semicircular convex joint. For equipment insulation, to enhance the strength of the metal plate, metal plate in each diagonal pressure two cross stitch.
For equipment and more than 3m riser insulation, adjacent to the two metal plates of semicircle convex slot overlap, from bottom to top, installation, the upper pressing the lower plate. Lap 50mm. When the pin is fixed, with a wooden hammer alignment pin plate through hole edge piece, removal of slag skin. Set of 3mm thick rubber pad, with locking washer sleeve pressing ( or AM6 nut ). When the supporting ring, plate fixation, plate overlap ( or overlapping ) where possible alignment support ring, plate, first with 3.6mm drill bit, then a self-tapping screw M4 × 15 fastening.
For pipeline insulation, which can be directly metal coiled in the insulation layer, on the slopes, bottom-up construction, two panel horizontal semicircle convex joint overlap, longitudinal buckle down, joint coincidence 50mm. If the support ring fixed plate, two lateral semicircular convex joint overlap as alignment support ring, so that the screw fastening.
Joint first with 3.6mm drill bit, then a self-tapping screw M4 × 15 fastening. Screw pitch 150~200mm.
When the screws are inconvenient to use, the lap joints available crimping fastening.
Consideration of the equipment and pipeline heat expansion displacement, metal protection should be in the extension direction keep proper activity placket.
Composite protective layer
Linoleum, for the humid environment of pipes and small cylinder equipment insulation outer protective layer. Direct rolling in the insulation layer, from low to high laying, transverse joint with dilute asphalt adhesive, longitudinal lap seam downward, are lap 50mm, then use galvanized iron or steel truss, distance 200~400mm.
Glass cloth, to close good thread wrapped in insulation layer ( or felt ). After lap around 40mm, from low to high construction, cloth belt ends and at intervals of 3M with galvanized iron or steel banding.
Glass cloth composite aluminum foil, used for pipes and small cylinder equipment insulation outer protective layer. Can be directly laid in addition to blanket outside the flat outside the heat insulation layer, overlapping seams 40mm, pressure-sensitive tape mat.
Glass cloth emulsified asphalt surface coating, in the wrapped glass cloth outer surface coating emulsified asphalt, the dosage of 2~3kg/m2, brushing two. Second in the first line of dried.
Glass fiber reinforced plastic, in the wrapped glass cloth coated hungry do not export polyester resin, the dosage is 1~2kg/m2.
The use of pressure sensitive adhesive tape, emulsified asphalt, unsaturated polyester resin and other materials, payable to the relevant production plant for performance and instruction for use. The fireproof requirement, should be chosen with self-extinguishing properties.
For glass cloth, glass steel and galvanized iron sheet outer protection layer, according to the design requirements and environmental needs, with colored paint, for protection or identification mark.