... ,16,20,25 d)Stiffiness:SN2500,5000,10000,Above 10000 Hobas CC-GRP(centrifugally cast glass reinforced plastics) Pipes systems are ... maintenance thus saving lots of costs of project's construction. HOBAS CC-GRP pipes had applied successfully in the projects.Specification ... surface5.Resistant to frost6.Low coefficient of expansion. GRP pipes(Hobas CC-GRP Pipes)