WarningAll pipe plugs must be blocked or anchored adequately against a force equal to the head pressure times the cross sectional area of the pipe. Debris or protrusions in the pipeline can damage a seal or rupture inflatable plugs. NEVER use an inflatable plug when its failure could cause injury or catastrophic damage or as the only means of protection for personnel working downstream.[price]Polymers HDPE LLDPE High & Low Density Polyethylene [hdpe]Reliance Polymers offers the entire range of Polyethylene (PE) High Density Polyethylene (HDPE), Linear Low density Polyethylene (LLDPE) and Low Density Polyethylene (LDPE). HDPE grades are specially designed to meet demanding applications like high pressure pipes, telecom ducts, carrier bags, woven sacks, and injection and blow moulded [price]UHMW Plastic Material UHMWPE Properties & Uses[hdpe]UHMW (ultra high molecular weight polyethylene) is an extremely tough plastic with high abrasion and wear resistance. The versatility of polyethylene has made it a popular plastic for countless industrial applications that require durability, low friction, and chemical resistance.