Gas distribution was among the first application of the medium density polyethene (MDPE) pipe. In fact many of the systems currently in use have been in continuous service since 1960 with greatsuccess. Today , over 90% of the pipe installed for the natural gas distribution industry in the U.S and Canada is plastic, and of the, 99% is polyethylene .Although the pipe resistance and stiffness increase from the bottom to the top, in contrast, its flexibility and impact strength increase. Because the natural gas pipes are more flexible and their impact strength are higher than the high density ones, they are recommended.
Natural gas pipes are in PE80 class. The environmental strength value to be reached in the medium density is 8.0 MPa for now. When this level increases, the wall thickness will decrease and the fluid quantity passing through will increase. When they are used for water, they can be used at 4 bar pressure in the natural gas line by changing the safety coefficient from 1,25 to 2,5 when used in PN 12,5 bar. Because the polymer chain is affected from the hydrocarbon structures, the safety coefficient is selected as high.
KAWSAR HDPE is lightweight, flexible and available in long coils there by making it easy to install and minimizing the number of joints in the piping system. KAWSAR HDPE pipe can be joined by the heat fusion or mechanical fitting and does not corrode like metal pipe. It provides long term resistance to variety of service condition such as , abrasion, temperature and soil shifts, bending, weathering , internal pressure , direct burial point loading and squeeze –off –advantages that give confidence to gas engineers the world over to specify Kawsar PE pipe for their distribution systems.