WebbCovers round (long-seam and spiral) duct from 4 in. to 60 in. in diameter, reinforced or unreinforced, for operation from 4 in. to 20 in. wg positive or negative pressure, and from ambient to 650ºF for carbon or stainless steel, 400ºF … Webb23 31 13 - 4 Mechanical Systems Guide Specification b. SEMCO Incorporated. c. Spiral Manufacturing Co., Inc. 2.3 FLUSH FLAT SEAM RECTANGULAR DUCTS AND FITTINGS A. General Fabrication Requirements: Comply with SMACNA's "HVAC Duct Construction Standards - Metal and Flexible" based on indicated static-pressure class, except use …

Technical in-person and online training SMACNA

WebbThe maximum permitted duct leakage is “Class 4” – 4 CFM per 100 ft2 of duct surface at 1” WG. You need look no further than the SMACNA HVAC Air Duct Leakage Test Manual to see it clearly shown that the expected leakage of a properly sealed rectangular Class A sealed duct system is Class 6. For round and flat oval duct systems it is Class 3. WebbSMACNA Class 3 Leakage Standards • Meets the requirements for SMACNA Seal Class A • Transverse & Longitudinal seam is pre-sealed with gasket made of EPDM rubber and proprietary co-polymer • Galvanized Steel (ASTM A653 and A924) • Standard product is supplied in 26 GA, G-60 coating (ASTM A653 and ASTM A90) • Available in Specialty … grace after meals pdf

RECTANGULAR INDUSTRIAL DUCT CONSTRUCTION STANDARDS

WebbLocated in headquarters outside Washington, D.C., the Sheet Metal and Air Conditioning Contractors' National Association (SMACNA), an international association of union contractors, has 1,834 members in 103 chapters throughout the United States, Canada, Australia and Brazil. Webb3. Sheet Metal and Air Conditioning Manufacturers National Association (SMACNA): a. Handbook of HVAC Systems and Equipment; Duct Construction. b. Rectangular Industrial Duct Construction Standards c. Round Industrial Duct Construction Standards d. HVAC Air Duct Leakage Test Manual e. Duct Cleanliness for New Construction Guidelines 4. chili\u0027s cheese fries