Polyethylene in 2000s: PE100 pipe

Scores compare Polyethylene with the rest of the atlas on strength, heat, fire behaviour, insulation, workability and circularity. They are editorial, not certificates. Seven chapters follow. Fire and insulation claims name test families (Euroclass, ASTM E84, ISO 5660, KS F) rather than inventing a single safety number.

Polyethylene ((C2H4)n) is a family of grades whose density 0.91–0.97 g/cm³, heat band LDPE ~110 °C; HDPE ~130 °C, and fire letter combustible olefin. Polyethylene is sold as grades, not as a single substance. Chemistry (C2H4)n, density 0.91–0.97 g/cm³, heat band LDPE ~110 °C; HDPE ~130 °C.

This atlas treats Polyethylene as a system: mill route, coatings, tests and the cavity it sits in. Conductivity note: ~0.4 W/m·K. Insulation score 44/100 is relative to 32 entries — metals lose, VIPs and aerogels win. Fire letter in editorial use: combustible olefin. Do not equate A1 with “safe in a blaze” or E with “illegal”. Assemblies decide.