... 2.54, CE, ISO 9001 and PICC are approved5, Size: φ20, 25, 32, 40, 50, 63,75mm;1. Healthy and non- ... )3. Adopting hot welding connection for excellent welding quality of pipes andfittings,leakage effectively prevented4. Excellent heat insulation features ... with minimal thermal conductivity (only onehundredth of the conductivity of metal pipes)5. Light weight (approximately 1/7 ...