According to the environment and the temperature and corrosiveness of the gas or dust, the ventilation equipment, ducts and accessories consumed by Jinan ventilation pipeline are manufactured with anti-corrosive materials or take corresponding anti-corrosive measures. The arrangement of air pipes, fire valves and smoke exhaust valves in the hot air heating, ventilation and air conditioning systems in buildings should meet the requirements of the current national fire protection standards for architectural design.
A。 Ventilation Pipeline and Component Insulation Engineering
The number of adiabatic fixing nails is determined according to the section size and location of the ventilation duct.
(2) After confirming the location of the fixed nail, dust and grease on the wall of the ventilation pipeline are wiped off, then the adhesive is applied on the wall of the ventilation pipeline and the bonding surface of the insulation nail respectively, and then it is bonded together later. Fixed nails should be adhered to for 12 to 24 hours and then covered with adiabatic data.
(3) Precise cutting of adiabatic material, nesting cutting, smooth cutting surface and no gap in lap. When the longitudinal and transverse joints are staggered, small pieces of data should be used as far as possible in the middle part of the upper plane of the ventilation pipeline.
(4) Galvanized steel sheet wrapping angle should be added at the four corners of the open rectangular ventilation duct, and fixed or clamped with galvanized iron wire or wrapping belt。
_When winding the glass cloth maintenance layer outside the insulation layer, first cut the glass cloth into long strips with a width of 200-400 mm according to the size of the ventilation duct section, and roll it into small rolls for reserve。 According to the size and diameter of ventilation duct section, different width glass cloth can also be selected for stereotyping。 When winding, first fix the end with a -shaped nail, and then tighten the glass cloth。 Edge winding, edge leveling, no wrinkling, flanging and other phenomena。 The lap width of the lap between the circle and the two sides of the circle should be 30-50 mm。 The end must be fixed with a -shaped nail, otherwise it is easy to loose and fall off。
_The surface of glass cloth should be coated with one or two fire-retardant coatings according to the design requirements。 The coatings should be close and average。
_A galvanized steel sheet or aluminium sheet should be added outside the insulation layer to maintain the outdoor exposed ventilation pipeline. The overlap between the shells should be fixed by riveting, and the overlap seam should be sealed with sealant.