Spiral Flat oval duct Prominent & Leading Manufacturer from Ahmedabad, we offer gi oval duct, oval spiral duct, spiral ducts, flat oval spiral duct and air ducting. Friction Loss Ps : Is lost along the length of the duct Pt = f D X ( cf4 X L/D ) X Pv Pt = Friction Loss in inches f D = Friction roughness based on Reynolds no. is 0.0005 for GI sheet duct with 40 joints per 100 feet cf4 = Conversion factor = 12 L= Length of duct in feet ( say 100 feet ) D= Inside Duct diameter in inches

Rectangular Ducts:- Slip & Drive - Slide-on Flange ... GI Thicknesses - Weight of GI Steel 25 Table of Contents 3. DUCT VENTILATION AIR CONDITIONING Co. (W.L.L.) CHAPTER 2 LAYOUT AND FABRICATION OF SHEET-METAL AND FIBER-GLASS DUCT As a Steelworker you are required to operate sheet-metal tools and to apply basic sheet-metal layout