safety concern, is it ok that steel liner touches chimney wall?

[ba_jie]

Hello, I noticed that my steel liners touches some part of the chimney interior surface after the installation is done.
My chimney flue is made of clay tiles and it's in good condition.
I am wondering if it's ok the liners touches the chimney surface? is there an safety concern there?

 

[ikessky]

The manual for my liner specifically states that it is a "zero clearance" liner. I would think you are just fine if you have the liner inside of the clay flue.