The oven heating tube is divided into the following two?

Commonly used in the oven is divided into two kinds of quartz tube and metal tube, quartz tube heating speed is faster, but it is easy to break and damage, black, and short life. The service life of metal pipes is relatively long, generally copper pipes and stainless steel pipes. Copper pipes will produce patina when used for a long time. Stainless steel tubes are divided into: 304 tubes, 430 tubes, 840 tubes, blue tubes ~~~ But the most commonly used is stainless steel 430 tubes.