The scope of application of this product:

Apply to all kinds of Auto-oil piping、braking piping、
boost-steering gear piping.

Products functions:

Our company select single/double-wall welding-pipe(bundy tube),
which are all accord with Country YB/T4164-2007 standards

Mechanical functions:　

         Rm≥290MPa
         Rel≥180MPa
         A≥25%

ID cleanliness: residuum ≤ 0.16g/ m2

Salt spray test:  no rusty on OD in 144hours