1) Healthy:non-poisonous, tasteless
2) High temperature resistance, Good impact strength
3) Convenient and reliable installation, low construction expenses
4) Excellent heat-insulation property from minimum thermal conductivity
5) Light weight, convenient to transport 
6) Smooth inner walls to reduce pressure loss and increase flow speed
7) Sound insulation (reduced by 40% compared to galvanized steel pipes)
8) Extremely long usage life :  50 years
standard: Din
size: from 20mm to 110mm