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Which PP Grade Does a PP-R Pipe Line Need?
A Hyosung pipe-grade datasheet states “PPR 125, MRS 12.5 MPa.” The grade number is ten times the minimum required strength at 20 C over 50 years (ISO 12162:2009). That makes it a hydrostatic strength class, not a temperature rating. A pipe extruder already committed to PP-R needs a tighter specification than that single number. The…
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