|
iso 4437 - hdpe for natural gas
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? |
| 所有的时间均为北京时间。 现在的时间是 06:47 AM. |