It is used when changing exhaust flow direction by 90°. Chimney liner elbows are made of acid-resistant chrome-nickel steel plates in grade 1.4404 according to DIN 17441 with a thickness of 0.5mm to 0.8mm.
They are mainly used for flue heating equipment. Such chimneys are resistant to the corrosive effects of acidic condensate formed during the combustion process.
90 degree bends restrict the flow, no matter if you are using high flow or low flow. Yes that is correct, but the more applicable answer is the degree to which they affect flow.
In a high flow situation they cause more problems than in lower flowing applications.
DuraBlack Stainless Steel 90 Deg. Elbow is used to offset around ocstructions as needed.
Size: Ø 130mm / 5.12"