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ORANGE COUNTY 230719-2
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<br />Emergency Management Warehouse Building Dehumidification HVAC Piping Insulation
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<br />GENERAL INSTALLATION REQUIREMENTS 1
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<br />For Classification Type 1 and 2 piping, do not insulate valves, strainers, unions, etc. unless indicated 3
<br />hereinafter. For Classification Type 3 piping, install insulation over fittings, valves, strainers, flanges, 4
<br />unions, and other specialties with continuous thermal and vapor-retarder integrity unless otherwise 5
<br />indicated. 6
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<br />Install insulation materials, accessories, and finishes with smooth, straight, and even surfaces; free of voids 8
<br />throughout the length of piping including fittings, valves, and specialties. 9
<br />Install insulation materials, forms, vapor barriers or retarders, jackets, and thicknesses required for each item of pipe 10
<br />system as specified in insulation system schedules. 11
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<br />Insulate pipe elbows using preformed fitting insulation or mitered sections made from same material and density as 13
<br />adjacent pipe insulation. Each piece shall be butted tightly against adjoining piece and bonded with adhesive. Fill 14
<br />joints, seams, voids, and irregular surfaces with insulating cement finished to a smooth, hard, and uniform contour 15
<br />that is uniform with adjoining pipe insulation. 16
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<br />Insulate tee fittings with preformed fitting insulation or sectional pipe insulation of same material and thickness as 18
<br />used for adjacent pipe. Cut sectional pipe insulation to fit. Butt each section closely to the next and hold in place with 19
<br />tie wire. Bond pieces with adhesive. 20
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<br />Insulate valves using preformed fitting insulation or sectional pipe insulation of same material, density, and thickness 22
<br />as used for adjacent pipe. Overlap adjoining pipe insulation by not less than two times the thickness of pipe 23
<br />insulation, or one pipe diameter, whichever is thicker. For valves, insulate up to and including the bonnets, valve 24
<br />stuffing-box studs, bolts, and nuts. Fill joints, seams, and irregular surfaces with insulating cement. 25
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<br />Insulate flanges and unions using a section of oversized preformed pipe insulation. Overlap adjoining pipe insulation 27
<br />by not less than two times the thickness of pipe insulation, or one pipe diameter, whichever is thicker. 28
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<br />Install removable insulation covers for valves and piping specialties and where indicated on the Drawings. 30
<br />Installation shall conform to the following: 31
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<br />Make removable flange and union insulation from sectional pipe insulation of same thickness as that on 33
<br />adjoining pipe. Install same insulation jacket as adjoining pipe insulation. 34
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<br />Construct removable valve insulation covers in same manner as for flanges, except divide the two-part 36
<br />section on the vertical center line of valve body. 37
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<br />Install insulation accessories compatible with insulation materials and suitable for the service. Install accessories that 39
<br />do not corrode, soften, or otherwise attack insulation or jacket in either wet or dry state. Install insulation with 40
<br />longitudinal seams at top and bottom of horizontal runs. 41
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<br />Install multiple layers of insulation with longitudinal and end seams staggered. Do not weld pins, clips, or other 43
<br />insulation attachment devices to piping, fittings, and specialties. 44
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<br />Keep insulation materials dry during application and finishing. 46
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<br />Install insulation with tight longitudinal seams and end joints. Bond seams and joints with adhesive recommended by 48
<br />insulation material manufacturer. 49
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<br />Install insulation with least number of joints practical. 51
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<br />Where vapor barrier is indicated, seal joints, seams, and penetrations in insulation at hangers, supports, anchors, and 53
<br />other projections with vapor-barrier mastic. 54
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<br />DocuSign Envelope ID: 7668B866-6C26-485C-9A45-DAAB5D4BD951
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