Formolene® HP4401 is a high performance copolymer that is designed for the most demanding requirements of pressure pipe applications. It has good long-term hoop strength performance, very high melt strength, and outstanding toughness even at low temperatures.

Formolene® HP4401 meets all requirements of ASTM D4976 - PE 235.

When blended with the approved color concentrates, Formolene® HP4401 has a cell class of 345464C per ASTM D3350-05, is listed by PPI as a PE3608 material with HDB's of 1,600 psi @ 73°F and 800 psi @ 140°F and meets the requirements of NSF Standard 14/61 for use with potable water. Formolene® HP4401 also qualifies as a PE3408 material under the old ASTM D3350-02a and PPI standards. Formolene® HP4401 also qualifies as a PE80 material per ISO 9080.