Yimuphi umehluko phakathi kwe-DN, De, φ, PN kanye ne-SDR ephawulwe epayipini?

I-DN/De/D / Φ / PN/umehluko phakathi kwe-SDRS

D: Ngokuvamile libhekisela kububanzi bangaphakathi bepayipi, ububanzi besiyingi sangaphakathi sodonga lwepayipi.

I-DN: ibhekisela kububanzi obujwayelekile, okwaziwa nangokuthi ububanzi obujwayelekile bangaphandle, okungebona ububanzi bangaphandle noma ububanzi bangaphakathi bepayipi, kodwa isilinganiso sobubanzi bangaphandle nobubanzi bangaphakathi. Lolu uchungechunge olujwayelekile lwamapayipi nezesekeli. Ukusetshenziswa kobubanzi obujwayelekile kuyasiza ekufezeni ukulinganisa kwezingxenye, futhi kulula ukuklama, ukukhiqiza, ukulungisa nokuphatha, futhi kunciphisa izindleko zokukhiqiza. Kumapayipi, i-DN iwukumelela usayizi ongaphansi kobubanzi bangaphandle futhi omkhulu kunobubanzi bangaphakathi. Ngokuhambisana nobubanzi obujwayelekile bepayipi, ububanzi bayo bangaphandle buyinani elinqunyiwe, futhi ububanzi bangaphakathi buyahlukahluka ngokobukhulu bodonga.

I-φ: ibhekisela kububanzi bangaphandle bepayipi, okungukuthi, ububanzi bangaphandle bepayipi kufaka phakathi ubukhulu bodonga lwepayipi. Ipayipi lensimbi elijwayelekile elingenamthungo, ipayipi lensimbi elijikelezayo lisetshenziselwa ukuphawula usayizi we-φ, elimakwe ngesimo sobukhulu bodonga olungaphandle lwepayipi X. Isibonelo, i-φ 108 x 4 isho ipayipi elinobubanzi bangaphandle obungu-108mm kanye nobukhulu bodonga obungu-4mm.

I-De: ibhekisela kububanzi bangaphandle bamapayipi. Ububanzi bangaphandle bamapayipi e-PPR, PE kanye ne-POLYPROPYLENE ngokuvamile buphawulwa yi-De, ngokuvamile buphawulwa ngesimo sobukhulu bodonga obungaphandle obungu-X. Njenge: De110 x 6.6.

Ubudlelwano phakathi kwe-DN, i-De kanye ne-φ:
U-De ulinganisa ububanzi bodonga lwangaphandle lwepayipi; i-DN ingu-De minus ingxenye yobukhulu bodonga lwepayipi; u-φ ubonisa ububanzi besiyingi esivamile.

De, DN, D, phi ububanzi babo obufanele:
I-De- PPR, ipayipi le-PE, ububanzi bepayipi le-polypropylene;
I-DN– ububanzi obujwayelekile bepayipi le-polyethylene (PVC), ipayipi lensimbi ephonswe, ipayipi elihlanganisiwe lensimbi-ipulasitiki, ipayipi lensimbi elihlanganisiwe;
D — Ububanzi obujwayelekile bepayipi likakhonkolo;
ф– Ipayipi lensimbi elingenamthungo noma ipayipi lensimbi elingenayo insimbi kufanele libhalwe ukuthi “ububanzi bangaphandle × ubukhulu bodonga”.

I-PN: ibhekisela kungcindezi ejwayelekile, esetshenziselwa ukuveza ingcindezi yamapayipi, ukufakwa kwamapayipi, amavalvu kanye neminye imishini yegobolondo. Inombolo elandelwa uhlamvu lwe-PN ayimeleli inani elilinganisiwe. Isibonelo, kupayipi lokuphakelwa kwamanzi le-PE le-PN1.0mpa, i-1.0 imele izinga lokucindezela. Ingcindezi ejwayelekile ibhekisela kungcindezi yokusebenza yokudluliselwa kwamanzi kwepayipi ekushiseni kwesibili (20℃), okungukuthi, ingcindezi yokusebenza eqhubekayo ephezulu esebenza odongeni lwangaphakathi lwepayipi ngaphansi kwesimo sokusebenza esijwayelekile. Manje ipayipi lokuphakelwa kwamanzi le-PE elisetshenziswa kakhulu lihlukaniswe ngama-0.6, 0.8, 1.0, 1.25, 1.6 amazinga okucindezela amahlanu.

I-SDR: ibhekisela kusilinganiso sosayizi ojwayelekile noma isilinganiso sosayizi ojwayelekile samapayipi. I-SDR epayipini lokuphakelayo le-PE ibhekisela kusilinganiso esiphakathi kobubanzi obujwayelekile be-de kanye nobukhulu bodonga obujwayelekile be-EN yepayipi, okungukuthi i-SDR=de/en. Kuyipharamitha ebalulekile yokulawula ukujiya kodonga lwepayipi nokunquma ikhono lokuthwala ingcindezi yangaphakathi. Isibonelo, okuphawulwe kupayipini le-PE: SDR26 PN0.6mpa, SDR21 PN0.8mpa, SDR17 PN1.0mpa, SDR13.6PN1.25mpa, SDR11 PN1.6mpa, njll.

Ipayipi lepulasitiki liyi-resin yokwenziwa kanye nezithasiselo ezincibilikiswa yimikhiqizo yokucubungula ukubumba. Izithasiselo zifaka i-plasticizer, i-stabilizer, i-filler, i-lubricant, i-colorant, i-ultraviolet absorbent, i-modifier, njll.

Kusetshenziswa kakhuluamapayipi epulasitikiyilezi: ipayipi le-polyvinyl chloride eliqinile (i-PVC-U), ipayipi le-polyethylene elinobukhulu obuphezulu (i-PE-HD), ipayipi le-polyethylene elixhumene (i-PE-X), ipayipi le-polypropylene elingahleliwe (i-PP-R), ipayipi le-polybutene (i-PB), amapulasitiki obunjiniyela i-propylene qing-butadiene-styrene copolymer (i-ABS) njalo njalo. Ukwakheka kwezinto zepayipi lepulasitiki kunquma izici zepayipi lepulasitiki.

1) Izinzuzo eziyinhloko zamapayipi epulasitiki

• Ukuqina okuhle kwamakhemikhali, akuthinteki yizici zemvelo kanye nezingxenye eziphakathi nendawo epayipini, ukumelana okuhle nokugqwala.

• Ukushisa okuncane, ukushisa okuphansi, ukufudumala okushisayo, umphumela omuhle wokonga amandla.

• Ukusebenza kahle kwe-hydraulic, udonga lwangaphakathi lwepayipi lubushelelezi, i-coefficient yokumelana incane, akulula ukuyilinganisa, indawo yokugeleza epayipini ayishintshi ngokuhamba kwesikhathi, futhi amathuba okuvimba ipayipi mancane.

• Uma iqhathaniswa nepayipi lensimbi, inobukhulu obuphansi, izinto ezilula, ukuthuthwa nokufakwa okulula, kanye nokugcinwa okulula.

• Ukusebenza kokugoba kwemvelo noma ukusebenza kokugoba okubandayo, ukuhlinzekwa kwekhoyili kungasetshenziswa ukunciphisa inani lamajoyinti epayipi.

2) Ithonya lokusebenza kwamapayipi epulasitiki

• I-Pvc-u, i-PP kanye ne-ABS zinezakhiwo eziphakeme kakhulu zemishini futhi zibhekwa “njengamashubhu aqinile” anokufakwa okuvulekile okungcono. Ngokuphambene nalokho, i-PE, i-PE-X, i-PB “njengeshubhu eliguquguqukayo” elifanelekela ukumbozwa okumnyama.

• Ukumelana nokushisa kwepayipi lepulasitiki kanye nokushisa kunquma ukuthi i-PVC-U, i-PE, i-ABS ingasetshenziswa kuphela kumapayipi amanzi abandayo, kuyilapho i-PE-X, i-PP, ne-PB ingasetshenziswa njengepayipi lamanzi ashisayo. Uma isakhiwo sinesistimu yokuhlinzeka ngamanzi ashisayo kanye nokusetshenziswa kwamapayipi ashisayo nabandayo afanayo ukumelana nokushisa kuba yinkomba eyinhloko.

• Ipayipi lepulasitiki ngenxa yokwanda okuphezulu kokushisa, ikakhulukazi njengepayipi lamanzi ashisayo epayipini lepulasitiki, isikhombikubona esiguquguqukayo, amajoyinti okunweba noma ukugoba okuhlukahlukene kanye nezinye izindlela zokunciphisa ukushisa ziningi kakhulu. I-PE, i-PP kanye nezinye i-polyolefin yizona ezibaluleke kakhulu. Uma ukwakhiwa nokufakwa kungasinaki ngokwanele lokhu, futhi kuthathwe izinyathelo zobuchwepheshe ezihambisanayo, kulula ukwenzeka esikhombikubona ngenxa yokuthi ijoyinti lokunweba lisusa inkinga.

• Ngenxa yokushisa okuphansi, ukusebenza kokushisa kwepayipi lepulasitiki kuhle kakhulu futhi kunganciphisa ukujiya kwesendlalelo sokushisa noma ukungabi khona kokushisa. Ukuqhathaniswa kokushisa phakathi kwamapayipi epulasitiki ahlukene akuhlobene nje kuphela nokushisa, kodwa futhi kuhlobene nobukhulu bodonga lwamapayipi awo.