Common Industry
Outside Diameter Comparisons

Nominal Size DN	Ductile Iron to AS/NZS2280	uPVC to AS/NZS1477 Series 1	uPVC to AS/NZS1477 Series 2	Asbestos Cement Class C	Hobas (GRP)
100	120.4-123.4	114.1-114.5	121.7-122.1	118.9-124.9	–
150	175.8-178.8	160.0-160.5	177.0-177.6	174.3-180.3	–
200	230.7-233.7	225.0-225.6	231.9-232.6	229.2-235.2	–
225	256.6-260.6	250.0-250.7	258.9-259.6	256.1-262.1	–
250	284.5-287.5	280.0-280.0	285.8-286.6	281.0-291.0	–
300	343.9-346.9	315.0-315.9	344.9-345.8	340.4-350.4	343.8-345.6
375	424.7-427.7	400.0-401.0	–	421.2-431.2	424.8-4266
450	505.5-508.5	–	–	501.0-517.0	505.8-507.6
500	558.8-561.8	–	–	–	–
525	–	–	–	581.2-597.2	585.6-587.6
600	665.5-668.5	–	–	661.0-677.0	665.3-667.6
750	822.5-831.0	–	–	–	824.0-826.8

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