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� � <br /> ; I <br /> � <br /> � <br /> � , MECHANICAL SYSTEM INSULATION <br /> I ; I SECTION 15250 <br /> �I ! I <br /> , � <br /> 2. PART 2=PRODUCTS <br /> ,� � <br /> 2.1 P�IPING INSULATION <br /> � <br /> A�. Type A <br /> � ' 1. Glass fiber, rigid molded sectional pipe covering, conforming to ASTM C547, Class II, <br /> ' � Mineral Fiber Preformed Pipe Insulation. <br /> , ; � 2. Conductivity (k) equals approximately 0.23 (BTU-IN/HR., SF., Degree F) per inch <br /> �� I thickness at 75 degree F. <br /> � ; 3. Approved manufacturers trade names: <br /> � � � a. Manville Corp.-"Micro-Lok 650-AP-T'. <br /> ' � b. Owens Cornin g Fiber glass Cor p.-"One Piece"25 ASJ/SSL". <br /> � ; c. Certain-Teed-"500 Degree Snap-On". <br /> � d. Approved Equal. <br /> � <br /> B. Type B <br /> � <br /> �, � � <br /> 1. Closed cell, flexible foamed plastic conforming to ASTM C534, "Preformed Flexible <br /> i Elastomeric Cellular Thermal Insulation in Sheet and Tubular Form." <br /> � � 2 Conductivity (k) equals approximately 0.27 (BTU-IN/HR., SF., Degree F) per inch <br /> ' j thickness at 75 degrees F. <br /> � ' i <br /> , � 3. Approved manufacturers and trade names: <br /> i <br /> i � I a. Armstrong-"Armaflex". <br /> � b. B.F. Goodrich-"Flexible Insulation Tubing and Sheeting". <br /> ; c. Manville Corp.-"Aerotube". <br /> ! d. Approved Equal. <br /> I � <br /> , <br /> 2.2 !DUCTWORK INSULATION <br /> i ,. <br /> i �A. Type F <br /> � <br /> � � 1. Flexible mineral fiber blanket conforming to ASTM C553,Type I, Class B-5(up to 400 <br /> � � i degrees F.), 0.75 pcf nominal. <br /> � � 2. Conductivity (k) equals approximately 0.24 (BTU-IN/HR., SF., degrees F) per inch <br /> ' <br /> i thickness at 75 degrees F. <br /> � 3. Integral UL rated vapor barrier of: <br /> i i � <br /> � i a. Aluminum foil reinforced with fiberglass scrim laminated to 30 Ib. kraft paper. <br /> b. Class I white vinyl 0.004 inch thick,where specified. <br /> 1 � <br /> , <br /> , � <br /> � <br /> i <br /> i (97008-040497) 15250-2 <br /> I ' • <br /> , II <br /> i <br /> I <br /> � I <br /> � � <br />