?????????????????????????
1?????????????????,??????????????,???????й????????.??????岻???,?????GB3280??GB4237???????.????????????,??????????????????????л????,?????????????????,????????????,???????.???????б?????????,????????.
2??????????л?????,?????????????????????????.
3?????????????????????????????????.
??????????1.6MPa???????????????????,??????????2.5MPa??????????????????,???????????????е?Σ???????ж???????????,??????????????????????????????е?????????????????????.
????????????0.1MPaС?????1.6MPa???????????????????,????????????0.1MPa??С?????2.5MPa??????????????????,?????????????????????????????10%??????????????????????,??,??????????????????.
????????????????????????2mm?????????.???????:???????????????????????????????????С??1.5mm???????????????????150mm???????????????????????????1/2??????????????????????.
?????????,??????2mm???庸??,????JB4730-94?й涨??II?????.???????С??2mm?,?????????????????GB16749-97?и??B?涨????.
???????
???????????HDPE?????????????????
???????????????????????pvc???