Cov kav dej PP-R thiab fittings yog ua raws li cov ntaub ntawv luam copolymerized polypropylene ua cov khoom lag luam tseem ceeb thiab tsim tawm raws li GB / T18742. Polypropylene tuaj yeem muab faib ua PP-H (homopolymer polypropylene), PP-B (thaiv copolymer polypropylene), thiab PP-R (random copolymer polypropylene). Ob chav phab ntsa corrugated yeeb nkab tshuab ua lub luag haujlwm tseem ceeb hauv kev tsim cov yeeb nkab. PP-R yog cov khoom siv ntawm kev xaiv rau cov kav dej polypropylene rau cov dej kub thiab dej txias vim nws lub cev tiv thaiv ntev ntev rau cov dej tsis ua haujlwm ntawm hydrostatic, ntev ntev-tshav kub-resistant oxygen laus thiab kev ua thiab molding.
PP-R raj yog dab tsi?
PP-R yeeb nkab kuj tseem hu ua peb-hom polypropylene yeeb nkab. Nws txais yuav kev siv los ua luam ntawv (copolymer polypropylene) ua kom loj ntxiv mus rau hauv cov yeeb nkab, thiab txhaj-moulded rau hauv yeeb nkab. Nws yog hom tshiab ntawm cov yeeb nkab yas tsim tawm thiab thov nyob hauv Europe thaum ntxov xyoo 1990. PP-R tshwm sim nyob rau hauv lub caij nplooj zeeg 80′s, siv roj theem copolymerization txheej txheem los ua kom txog 5% PE nyob rau hauv PP molecular saw across thiab uniformly polymerized (random copolymerization) los ua lub cim tshiab ntawm cov raj xa khoom. Nws muaj qhov cuam tshuam zoo thiab qhov ua haujlwm ntev ntawm kev nce qib.
Dab tsi yog cov yam ntxwv ntawm PP-R kav dej? Cov yeeb nkab PP-R muaj cov yeeb yam tseem ceeb hauv qab no:
1.non-mob toxic thiab huv. Cov khoom siv raw molecules ntawm PP-R tsuas yog carbon thiab hydrogen xwb. Tsis muaj cov khoom tsim kev phom sij thiab tshuaj lom. Lawv huv huv thiab txhim khu kev qha. Lawv tsis yog siv hauv cov kav dej kub thiab txias-txias xwb, tabsis tseem siv cov tshuab dej ntshiab huv.
2.Heat preservation thiab txuag hluav taws xob. Lub thermal conductivity ntawm PP-R yeeb nkab yog 0.21w / mk, uas tsuas yog 1/200 ntawm qhov ntawm cov yeeb nkab steel.
3. zoo thaum tshav kub kub ua hauj. Qhov vicat qhov muag ntxig ntawm PP-R lub raj yog 131.5 ° C. Kev ua haujlwm siab tshaj plaws tuaj yeem ncav cuag 95 ° C, uas tuaj yeem ua tau raws li cov kev cai ntawm cov dej kub hauv kev tsim cov dej thiab cov dej tso tawm.
4. ntev kev pab lub neej. Kev ua haujlwm lub neej ntawm PP-R yeeb nkab tuaj yeem ncav cuag ntau dua 50 xyoo nyob hauv kev ua haujlwm ntawm 70 ℃ thiab ua haujlwm siab (PN) 1.OMPa; kev pab lub neej ntawm kub tsis txias (20 ℃) tuaj yeem ncav cuag ntau dua 100 xyoo.
5.Easy installation thiab txhim khu kev qha kev txuas. PP-R muaj cov vuam kev ua tau zoo. Cov kav dej thiab cov fittings tuaj yeem txuas los ntawm kub-yaj thiab hluav taws xob vuam, uas yog ib qho yooj yim rau kev txhim kho thiab txhim kho hauv pob qij txha. Lub zog ntawm cov khoom sib txuas yog ntau dua lub zog ntawm cov yeeb nkab nws tus kheej.
6. Khoom siv tuaj yeem rov ua dua tshiab. PP-R khib nyiab raug muab ntxuav thiab zuaj thiab rov ua dua tshiab rau cov yeeb nkab thiab cov yeeb nkab. Tus nqi ntawm cov khoom siv rov ua dua tshiab tsis tshaj 10% ntawm tag nrho cov nyiaj, uas tsis cuam tshuam rau cov khoom lag luam zoo.
Dab tsi yog daim teb thov tseem ceeb ntawm PP-R kav dej?
1.Qhov lub tsev ua haujlwm txias thiab dej kub, nrog rau cov cua kub nruab nrab;
2.Qhov cua sov nyob hauv tsev, suav nrog hauv pem teb, chav tsev thiab radiant cua sov;
3.Pure cov dej tsis sib haum rau haus ncaj qha;
4.Central (centralized) lub tshuab cua txias;
5.Txoj kev txhim kho cov raj xa dej rau thauj lossis tawm khoom siv tshuaj.
Lub sij hawm tshaj tawm: Tsib Hlis-19-2021