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Polyethylene PE is popular material and and commonly used as water pipes in the PE 50, PEH or PE HD (PolyEthylene High Density) qualities.. PE pipes are produced in different pressure grades PN grades indicating the pressure in bars the pipe supports with water at 20 o C.. Pressure grades according to European standards:[pipe]PN 16 Flanges DIN EN 1092 1 Dimensions of PN 16 Flanges [hdpe]Dimensions in mm. * For flanges type 21 the outside hub diameter approximately corresponds to the outside pipe diameter, ** 8 holes is preferred however 4 holes may be supplied upon special request by the purchaser. NOTEThe p/t ratings from EN 1092 1 apply only for flange types 05, 11, 12, 13 and 21 having nominal sizes up to and including DN [pipe]
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