?????????-?????????????-?????????????-???????
??ī???????Ductile Cast Iron Pipes???????????
??ī???????????????????衢????????t?????б??????GB/T13295-2003 ISO2531/2003 ??? ??? ????????????????????????????????? ??????????????????????й????綣????
???? ???? ????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????
?????????????????????塢???????????? 1?????? 2?????????50?????? 3????????? 4?????????????? 5??????????? 6?????????и? 7???????????
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??? |
???????в???????? |
????????????????? |
???W??????????????? |
|
??? |
DN 50 |
DN 50 |
DN 50 |
|
DN 75 |
DN 75 |
DN 75 |
|
|
DN 100 |
DN 100 |
DN 100 |
|
|
DN 125 |
DN 125 |
DN 125 |
|
|
DN 150 |
DN 150 |
DN 150 |
|
|
DN 200 |
DN 200 |
DN 200 |
|
|
|
|
|
|
??????
1947?????H. Morrogh????????????????????и????棬??京????0.02wt%????????ī???????1948??????A. P. Ganganebin?????о?????????????????t??????ù???????????????t??????0.04wt%??????????ī??????????ī?????????????????????
????ī?????????????????ī?????????ī??????????????????????????????????????????????????????????20??25?????????????????????PVC???????????????????????????t????????????????к????顣??????ù????????п??????????
??ī??????
????
???18???????????????????????????????????ī??????????????????????????????ī????????????????????????ī??????
???
?????????????????????????????????????????????????????????????????????????????????
??????
??ī???????????????????衢????????t???
???????
????????????????????????????????????ī????????????????????????????????????е??????????????????????????С????????????????????20%????????????????25%?????
???????
??С???????
420/Mpa????С???????300/Mpa????С??????7%
??б??
GB/T13295-2003 ISO2531/2003
???
DN80-DN2600
?????????????????????????????????????????????????????????????????????????????????????????С???????????????????????????????????????????????????????????,??????????????20#??45#??16MN??Q345??A/B/C/D/E????27SIMN??15CrMO??12Cr1MOV??10CrMO910??304??304L??316??316L??321??P11??P22??P91??T91.??й???GB8162-99?????GB8163-99????????????ù?????????GB3087-99??GB5310-85????????ˉ?ù??GB5312-8???ù??...
???????????0510-88264321??88223334 ???棺0510-88223334 ?????18921237777
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?????λ???
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