iso 4437 - hdpe for natural gas
does any one know what specs european valve manufactures (pe100 or pe80) manufacture and test hdpe valves to? i cannot find any reference in iso 4437.
can these valves (pe100) be used under the astm d2513 specs if they do not comly to asme b16.40?
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发表于 2009-9-5 19:02:46
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