Liansu PE-RT pipe and fittings comply with DIN 16833(performances), DIN 16834(dimensions) and DIN 4721(floor heating system). Advantages:1) Light weight,Sanitary. ... be sold in coil shape.3) Superior thermal conductivity.(The heat conductivity coefficient is 0.4W/m'k,suitable for using ... .5162.7100,200,300203.4100,200,300254.2100,200325.4100 PE-RT pipe