PP-R kav thiab fittings yog raws li nyob rau hauv random copolymerized polypropylene raws li lub ntsiab raw khoom thiab yog tsim nyob rau hauv raws li GB / T18742. Polypropylene tuaj yeem muab faib ua PP-H (homopolymer polypropylene), PP-B (block copolymer polypropylene), thiab PP-R (random copolymer polypropylene). Ob chav phab ntsa corrugated yeeb nkab tshuab plays lub luag haujlwm tseem ceeb hauv kev tsim cov yeeb nkab. PP-R yog cov khoom ntawm kev xaiv rau cov kav dej polypropylene rau cov dej kub thiab txias vim nws lub sij hawm ntev tsis kam mus rau hydrostatic siab, lub sij hawm ntev tshav kub-resistant oxygen aging thiab ua thiab molding.
PP-R tube yog dab tsi?
PP-R yeeb nkab tseem hu ua peb hom polypropylene yeeb nkab. Nws siv random copolymer polypropylene extruded rau hauv cov yeeb nkab, thiab txhaj tshuaj molded rau hauv cov yeeb nkab. Nws yog ib yam tshiab ntawm cov yeeb nkab yas khoom tsim thiab siv nyob rau hauv cov teb chaws Europe thaum ntxov 1990s. PP-R tshwm sim nyob rau hauv lub lig 80′s, siv roj theem copolymerization txheej txheem kom txog li 5% PE nyob rau hauv PP molecular saw randomly thiab uniformly polymerized (random copolymerization) los ua ib tug tiam tshiab ntawm pipeline cov ntaub ntawv. Nws muaj kev cuam tshuam zoo thiab kev ua haujlwm ntev mus ntev.
Dab tsi yog cov yam ntxwv ntawm cov kav dej PP-R? PP-R yeeb nkab muaj cov yam ntxwv tseem ceeb hauv qab no:
1.non-toxic thiab huv si. Cov khoom siv raw khoom molecules ntawm PP-R tsuas yog carbon thiab hydrogen. Tsis muaj teeb meem thiab tshuaj lom. Lawv yog cov huv thiab txhim khu kev qha. Lawv tsis tsuas yog siv rau hauv cov kav dej kub thiab dej txias, tab sis kuj siv rau hauv cov dej ntshiab huv.
2.Kev txuag hluav taws xob thiab txuag hluav taws xob. Lub thermal conductivity ntawm PP-R yeeb nkab yog 0.21w / mk, uas tsuas yog 1/200 ntawm cov yeeb nkab steel.
3.zoo kub tsis kam. Lub vicat softening point ntawm PP-R raj yog 131.5 ° C. Qhov siab tshaj plaws ua haujlwm kub tuaj yeem ncav cuag 95 ° C, uas tuaj yeem ua tau raws li cov kev xav tau ntawm cov dej kub hauv lub tsev dej thiab cov kua dej specifications.
4. Lub neej ua haujlwm ntev. Lub neej ua haujlwm ntawm PP-R yeeb nkab tuaj yeem ncav cuag ntau tshaj 50 xyoo nyob rau hauv kev ua haujlwm kub ntawm 70 ℃ thiab ua haujlwm siab (PN) 1.OMPa; Kev pabcuam lub neej ntawm qhov kub thiab txias (20 ℃) tuaj yeem ncav cuag ntau tshaj 100 xyoo.
5.Easy installation thiab txhim khu kev qha kev twb kev txuas. PP-R muaj kev vuam zoo. Cov kav dej thiab fittings tuaj yeem txuas nrog kub-melt thiab hluav taws xob vuam, uas yooj yim rau nruab thiab txhim khu kev qha hauv cov pob qij txha. Lub zog ntawm cov khoom sib txuas yog ntau dua li lub zog ntawm cov yeeb nkab nws tus kheej.
6. Cov khoom siv tuaj yeem siv tau. PP-R pov tseg yog ntxuav thiab crushed thiab rov ua dua rau cov yeeb nkab thiab cov yeeb nkab ntau lawm. Tus nqi ntawm cov khoom siv rov ua dua tsis pub tshaj 10% ntawm tag nrho cov nyiaj, uas tsis cuam tshuam rau cov khoom zoo.
Dab tsi yog daim ntawv thov tseem ceeb ntawm cov kav dej PP-R?
1.Lub tsev cov dej txias thiab dej kub, nrog rau cov cua sov hauv nruab nrab;
2.Cov cua sov hauv lub tsev, nrog rau hauv pem teb, siding thiab radiant cua sov system;
3. Cov dej ntshiab huv rau kev haus dej ncaj qha;
4.Central (centralized) cua txias system;
5.Industrial pipeline systems rau kev thauj mus los lossis tso tawm tshuaj lom neeg.
Post lub sij hawm: May-19-2021