Raws li qhov sib txawv ntawm cov khoom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntaws, thaj chaw sib txawv tuaj yeem faib ua ob pawg:
1: HDPE yeeb nkab, PE cob nrog cov khoom siv zoo tau xaiv, uas tuaj yeem tiv taus qee yam ua haujlwm siab;
2: LDPE yeeb nkab, LDPE nrog kev ua haujlwm tau zoo raug xaiv, tab sis vim nws lub zog tsis zoo thiab lub zog sib zog, thiab nws tsis yooj yim txuas, nws tsis haum rau cov kav dej xa dej.
Tam sim no, feem ntau siv qhov tshwj xeeb ntawm kev ua lag luam yog PE100, uas txhais tau tias nyob rau hauv qhov xwm txheej ntawm 20 degrees Celsius, PE yeeb nkab tshwj xeeb cov khoom tseem tuaj yeem tswj tau qhov tsawg kawg nkaus uas yuav tsum tau muaj zog ntawm 10MPa tom qab 50 xyoo ntawm kev siv. Cov yam ntxwv muaj raws li hauv qab no: 1. Lub neej ua haujlwm ntev, sib npaug faib 2% -2.5% carbon dub polyethylene yeeb nkab tuaj yeem khaws cia sab nraum zoov li ntawm 50 xyoo.
2. Zoo hnav tsis kam, hnav tsis kam ntawm PE yeeb nkab yog 4 npaug ntawm cov yeeb nkab hlau.
3. Muaj zog yas. Piv nrog PPR kav, PE yeeb nkab tsis tuaj yeem khoov. Cov kav dej PE tau hloov pauv, yooj yim khoov, thiab tuaj yeem teeb tsa tau yooj yim.
4. Cov dej ntws tsis kam yog qhov me me, sab hauv ntawm PE yeeb nkab yog du, thiab Manning coefficient tsuas yog 0.009. Cov nplaim du thiab cov yam ntxwv tsis-nplaum ua kom ntseeg tau tias PE yeeb nkab tuaj yeem txo cov raj xa dej siab thiab siv dej siv zog.
5. Qhov ntsuas kub tsis kam tiv taus muaj zog, qhov ntsuas kub ntawm polyethylene yog qhov tsawg, thiab nws tuaj yeem siv ntawm qhov kub qis ntawm rho tawm 60 degrees Celsius, thiab yuav tsis muaj kev tawg hauv lub caij ntuj no.
6. Muaj kev nyab xeeb thiab tiv thaiv xeb.