It features: high temperature 
resistant(120℃,fire retarded),
 anti-abrasion, anti impact 
and anti-aging.  The close cell
 bubbles are foamed by cross 
linked PE (specially formulated
).  The inner pipe is foamed 
continuously without seam and 
closely welded with the outer 2 
layers. The insulation pipe has 
no air pocket among layers. The 
special structure ensures low water absorption and good thermal insulation
. The insulation pipe can work under 
-70-120℃. The good thermal insulation
 performance ensures no dewing, which 
avoid contamination of condensed water. 
The insulation is tested under 200 Hours
 of irradiation of Xenon lamp. No corrugate
, pin hole, cracks and pulverization are 
detected. It is kind of evidence of the
 8-10 year of life time under normal use.
It complies with the EU ROHS directive.The 
fire retarded insulation can reach the Level
 of UL-HF-1 (US) and M1(France).
The 3-layer product is composed of inner pipe
 (water crosslinked), middle layer (irradiation 
crosslinked) and outer UV resistant PE film.