Regarding metal hoses for heating furnaces
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I have a metal hose for a heating furnace, with threaded connections at both ends. How can I find out its nominal diameter DN? When choosing a hose for a heating furnace, does the type of connector need to match, or can it be universal regardless of DN? Thank you!
This hose comes in different sizes. When purchasing new hoses, the DN or inch size should be specified. If possible, remove the hose and measure it with calipers. If it can’t be removed, it’s no problem to take it off during maintenance, measure the dimensions, and then buy a new one. It’s very convenient to shop on Taobao these days.
1. Generally, steel stamps are printed on hose fittings, indicating the pressure rating and nominal diameter. Hoses with a direct change in diameter are rare, unless custom-made. 2. Check the markings on the connector on the opposite side. 3. An experienced person can tell just by looking. 4. It’s also possible to use calipers for measurement.
DN represents the diameter of the pipe; it’s not acceptable if DN is not specified
Generally, hose fittings are stamped with the pressure rating and nominal diameter. Diameter is generally expressed in inches.
There are several types of threads; please note: NPT, Rc, G, etc