How long is the service life of aerospace Chen Guangli brand three stainless steel natural gas pipeline?

There are two types of Li San trachea in Chenguang Branch of Aerospace Chenguang Group. One is soft stainless steel open pipe, which has been designed and used for 10 years. There is also a buried wall pipe, which can be customized in length and designed for 50 years. My family bought Gaohai building materials from Taobao, and the boss is very professional.