Making Duct Out Of Sheet Metal

Place a 4 foot by 8 foot piece of sheet metal on the work table.

Making duct out of sheet metal.

Galvanized mesh panels for making air ducts and accessories should be bite joined or riveted. The thickness of the steel plate for making air ducts and accessories δ 1 2mm can be connected by bite. It is normally used in the fabrication and joining of the round pipe or in joining or piecing together two sheets of metal to form a large wrap around section for square or rectangular ductwork. Align the end of the.

And because it is a better insulator there is less sound produced within the pipe. In addition the use of various hand tools and power tools required in sheet metal layout and fabrication is provided. This chapter describes some of the methods of measuring marking cutting forming and joining as well as installing sheet metal sections duct systems and fiber glass ducts. Lay a 4 by 10 foot sheet of duct board on your work area.

Nevertheless we were able to make all kinds of rectangular and round ducts and all types of fittings. Lay the steel ruler on the metal parallel to the edge of the long side. How to make hvac ducts step 1. δ 1 2mm should be welded.

Position it about 10 inches to 12 inches. The double seam is also called acme lock hammer lock and pipe lock in the sheet metal trade. A sheet metal transition is generally a piece of duct work that changes in cross section from one shape to another typically from a rectangle to a circle. Another reason is the smoothness of a plastic pipe is better than even galvanized steel which would then be better to reduce the turbulence mentioned in the article.

In 1986 i use to work at the sheet metal shop where we made all the ducts and fittings almost exclusively by hands. Yes we had a hydraulic guillotine shear sheet metal brakes slip roll machine hand tools and this about it. Snip all four corners of the duct on both ends for a distance of 1 inch and bend back the metal slightly to form flanges. The width of the sheet 4 feet will be the.

Flange butt welding should adopt gas welding. How to make the double seam lock. Cut along the lines you drew using tin snips to produce a length of duct with ends that angle in opposite directions. Sure you can insulate a sheet metal duct but why not buy a pipe where that is not necessary.