Flanged joints are created by bending the tip of your raw duct or fitting to make a ¼” flange. Beneath would be the code portion for your Intercontinental Mechanical Code for that authorized welded duct connections kinds. A number of varieties of commercial kitchen ventilation  and extraction systems cater to https://commercialkitchenextracts36789.ttblogs.com/16582992/little-known-facts-about-grease-tight-extract-ductwork