gate type. Damper blades shall be not less than 1.6 mm (16 gauge) 16 gauge
thickness of stainless steel. Blast gate dampers shall be two piece
construction with adjustable sliding gate and setscrew.
2.9
MATERIALS AND EQUIPMENT
Materials and equipment shall conform to the following requirements.
2.9.1
Screen
ASTM E 2016, type and class as required for the application.
2.9.2
Iron and Steel Sheets
2.9.2.1
Galvanized Iron and Steel
ASTM A 924/A 924M, Coating Designation G90.
2.9.2.2
Uncoated Steel
ASTM A 1011/A 1011M, condition, and type best suited to intended use.
2.9.2.3
Stainless Steel
ASTM A 167, Type 304.
2.9.3
Steel Structural Shapes
ASTM A 36/A 36M.
2.9.4
Solder Silver
AWS A5.8, brazing alloy; grade to suit application.
2.9.5
ASTM B 32, composition to suit application.
2.9.6
Bolts and Nuts
Bolts and nuts, except as required for high temperature exhaust
applications, shall be in accordance with ASTM A 307. Bolts and nuts used
for exhaust applications where the temperature of the bolt may rise above
200 degrees C 400 degrees F or used as flange bolts in corrosion resistant
material shall be in accordance with ASTM A 193/A 193M Class 2. The bolt
head shall be marked to identify the manufacturer and the standard with
which the bolt complies in accordance with ASTM A 307 or ASTM A 193/A 193M
as applicable.
2.10
ELECTRICAL WORK
**************************************************************************
NOTE: Electrical characteristics, motor starter
type, enclosure type, and maximum rpm should be
shown on the drawings in the equipment schedules.
**************************************************************************
Electrical motor-driven equipment specified shall be provided complete with
motor, motor starter, and controls. Unless otherwise specified, electric
SECTION 15940A
Page 13
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