Dab tsi yog PVC-O Pipe? Biaxially Oriented PVC piav qhia

PVC-O yeeb nkab yog dab tsi? Nws yog cov yeeb nkab siab ua los ntawm biaxially oriented polyvinyl chloride - tus qauv PVC-U uas tau ncav cuag ob txoj kev. (lengthwise thiab circumferentially) yog li ntawd nws ntev polymer chains dlhos rau hauv ib txheej, xaj qauv. Qhov no reorganization transforms ib tug nruj, brittle cov ntaub ntawv rau hauv ib qho nrog kwv yees li ob zaug lub zog tensile, peb mus rau tsib npaug ntawm qhov cuam tshuam, thiab tsim lub neej tshaj 100 xyoo. Hauv cov qauv thoob ntiaj teb PVC-O yog cais raws li MRS 500 - chav kawm siab tshaj plaws ntawm cov khoom siv thermoplastic siab, ua ntej ntawm PE100 ntawm MRS 100.

Yog tias koj tab tom teev cov dej mains, Tej zaum koj tau pom PVC-O tshwm hauv cov ntaub ntawv sib tw ntawm ib sab ntawm PVC-U, PVC-M thiab PE 100. Kab lus no piav qhia tias cov khoom yog dab tsi, yuav ua li cas cov txheej txheem kev taw qhia tiag tiag ua haujlwm, qhov txiaj ntsig txhais li cas rau qhov project, thiab qhov twg cov kev xav tsis zoo nyob.

Dab tsi ua qhov “O” hauv PVC-O tiag tiag sawv rau?

Cov “O” sawv rau taw qhia. Nws yog qee zaum sau ua PVCO, OPVC lossis PVC-O. Lo lus Suav yog biaxially oriented polyvinyl chloride (biaxially taw qhia polyvinyl chloride), thiab cov ntaub ntawv laus tej zaum kuj hu nws “Molecularly taw qhia PVC” los yog MOPVC.

Cov khoom siv hauv paus tsis txawv. PVC-O pib lub neej raws li ib tug zoo tib yam PVC-U preform - tib formulation siv extrude pa unplasticised PVC yeeb nkab, tsis muaj plasticisers ntxiv nyob rau txhua theem. Qhov sib txawv yog tag nrho txhua yam thiab yog qhia tom qab extrusion.

Yuav ua li cas cov txheej txheem biaxial orientation ua haujlwm

To taub cov txheej txheem tseem ceeb, vim nws piav qhia txhua qhov kev thov ua haujlwm uas ua raws li hauv qab no.

Cov pa PVC-U yeeb nkab yog thawj extruded. Lub cev, hu ua preform, muaj cov phab ntsa tuab thiab randomly tangled polymer chains. Nws yog ces rhuab mus rau ib tug meej qhov rais qhov rais thiab nthuav nyob rau hauv ob txoj kev ib zaug:

1. Circumferential (hoop) stretch. Internal cua siab nthuav cov preform radially nyob rau hauv ib tug sizing lub tes tsho. Phab ntsa nyias thiab txoj kab uas hla loj tuaj.
2. Axial (ntev) stretch. Cov yeeb nkab yog ib txhij rub downstream, orienting cov chains raws qhov ntev ntawm cov yeeb nkab.

Qhov tshwm sim yog cov yeeb nkab uas muaj tib txoj kab uas hla sab nraud tab sis cov phab ntsa nyias nyias - thiab, thuam, ib phab ntsa uas ntev PVC molecular chains tau teem rau hauv cov txheej txheem es tsis yog random coils. Cov txheej txheem txheej txheem yog dab tsi engineers them rau: nws yog cov qauv uas resists tawg propagation, vim hais tias ib qho kev sib tsoo uas ua tau raws li cov txheej txheem taw qhia yog nres es tsis pub khiav ntawm phab ntsa.

Cov nuj nqis kev lag luam muab cov khoom txuag ntawm mus txog 64% tsawg dua PVC compound rau cov chav kawm siab sib npaug piv nrog cov pa PVC-U, uas yog qhov twg tus nqi thiab cov lus sib cav carbon pib.

Cov khoom tseem ceeb technical ntawm ib nrais muag

Qhov feem ntau tshwm sim kab yog thawj tus. MRS yog qhov tsawg kawg nkaus uas yuav tsum tau muaj zog cov khoom pov thawj los tuav 50 xyoo, tsim los ntawm extrapolating hydrostatic siab kuaj ib ISO 9080. Vim tias PVC-O tuav 50 MPa thaum PE100 tuav 10 MPa, PVC-O xav tau ib phab ntsa nyias nyias kom ncav cuag tib qhov kev ntsuas siab - thiab tag nrho cov txiaj ntsig ntawm cov txiaj ntsig (lub cev ntaj ntsug, loj dua, tus nqi twj tso kua mis qis dua, khoom siv tsawg) ua raws li qhov tseeb ib leeg xwb.

Koj MRS 500 thiab “Chav Kawm 500” txhais tau tias hauv kev xyaum

Koj yuav pom PVC-O piav raws li Class 500, Chav kawm 450 los yog Class 400. Cov lej no yog tus nqi MRS hauv kaum ntawm MPa, yog li ntawd:

• Chav kawm 500 → MRS 50 MPa (qib siab tshaj; yuav tsum muaj kev tswj xyuas kom zoo)
• Chav kawm 450 → MRS 45 MPa
• Chav kawm 400 → MRS 40 MPa

Chav kawm yog ib nqe lus hais txog cov txheej txheem zoo, tsis yog kev lag luam xwb. Cov chaw tsim khoom uas tuaj yeem ntseeg tau tuav Class 500 yog ua kom pom kev tswj qhov kub thiab txias, stretch rate thiab phab ntsa kam rau ua. Thaum koj sib piv cov lus, nug cov chav kawm twg cov yeeb nkab tiag tiag yog - chav kawm 400 yeeb nkab tsis yog ib yam khoom raws li ib tug Class 500 yeeb nkab txawm tias ob leeg tau sau npe “PVC-O”.

Nco ntsoov tias North American cov qauv qhia tib lub tswv yim sib txawv. Raws li ASTM F1483 thiab AWWA C909, PVC-O yog tsim los ntawm nws cov Hydrostatic Design Basis, feem ntau PVCO 1135, uas sib haum mus rau lub sij hawm ntev zog ntawm yam tsawg kawg nkaus 6,810 psi (46.9 MPa).

Tsim coefficient C - yog vim li cas tib cov yeeb nkab tau txais cov kev ntsuas sib txawv hauv ntau lub teb chaws

Ib qho kev tsis sib haum xeeb ntawm cov phiaj xwm thoob ntiaj teb yog tias tib lub cev cov yeeb nkab yuav raug ntsuas PN16 hauv ib lub tebchaws thiab cov duab sib txawv ntawm lwm qhov.. Qhov sib txawv hauv qab no yog qhov zuag qhia tag nrho kev pab tsim coefficient, C, uas yog siv raws li:

design stress (σs) = MRS ÷ C

C txawv los ntawm 1.25 rau 2.0. Tus nqi qis tshaj, 1.25, tso cai rau cov khoom siv siab tshaj plaws xwb (450 thiab 500) thiab raws li Fabkis tus qauv NF T54-948; feem ntau lwm cov qauv yuav tsum muaj kev saib xyuas ntau dua C ntawm 1.4 rau 1.6. Qhov no yog vim li cas cov yeeb nkab PVC-O muab rau ISO 16422 nrog C = 1.6 nqa lub siab sib txawv los ntawm tib cov yeeb nkab ntsuas raws li lub teb chaws tus qauv tso cai C = 1.25.

Rau tus specifier, txoj cai siv tau yog: Tsis txhob hloov PN rau psi arithmetically thiab xav tias sib npaug. Paub meej tias tus qauv twg, chav kawm twg thiab qhov twg C tus nqi ntawm cov yeeb nkab tau lees paub rau, vim tias tus lej ntawm cov yeeb nkab phab ntsa tsuas yog muaj txiaj ntsig ua ke nrog peb cov ntaub ntawv.

Cov qauv twg tswj hwm PVC-O yeeb nkab?

Dab tsi yog PVC-O yeeb nkab siv rau?

Cov khoom sib xyaw ua ke ntawm kev muaj peev xwm siab thiab siab toughness haum rau cov ntawv thov uas tsis ua haujlwm kim:

• Municipal potable dej mains - lub cev thiab reticulation mains, tshwj xeeb yog qhov uas siv zog ntau xyoo dhau los yog qhov kev txhawj xeeb tsim
• Cov dej haus nyob deb nroog thiab cheeb tsam - Cov kab sib kis ntev thoob plaws thaj av uas sib koom ua ke tsis ua haujlwm lossis cov yeeb nkab tawg yuav raug nqi kho
• High-efficiency irrigation - kev sib txuas sib txuas uas muaj qhov loj dua sab hauv ntawm tib lub taub sab nraud kom txo tau lub taub hau
• Recycled dej thiab effluent pipelines - chemically inert phab ntsa xav tau tsis muaj hauv ob sab phlu lossis txheej
• Trenchless installation - lub siab cuam tshuam thiab taw tes-load kuj tolerates rub thiab jacking rog
• Kev kho dej ua haujlwm thiab cov txheej txheem dej ua haujlwm - qhov twg corrosion thiab scaling hauv cov yeeb nkab hlau tsim cov nqi tu tsis tu ncua

Feem ntau misconceptions txog PVC-O

“PVC-O yog cov yas sib txawv”

Nws tsis yog. Cov khoom siv raw yog PVC. Tsuas yog kev hloov pauv ntawm molecular. Qhov no tseem ceeb rau kev pom zoo, vim PVC-O tau txais cov khoom siv tshuaj thiab tu cev ntawm PVC - tsis muaj plasticisers tau qhia thaum kev taw qhia - uas yog vim li cas nws thiaj li tau ntawv pov thawj rau cov dej haus sib cuag raws li cov tswv yim xws li NSF / ANSI / CAN 61 thiab WRAS.

“Cov phab ntsa nyias yuav tsum txhais tau tias cov yeeb nkab tsis muaj zog”

Qhov no yog qhov kev nkag siab tsis meej tshaj plaws. Phab ntsa nyias yog muaj zog dua ib millimeter vim tias cov khoom tau raug kho dua tshiab. Cov yeeb nkab tseem ua tau raws li cov chav kawm siab tib yam; nws tsuas xav tau cov ntaub ntawv tsawg dua los ua li ntawd. Xav txog qhov sib txawv ntawm ib pob ntawm xoob fibers thiab tib lub fibers woven rau hauv ib tug taut cable.

“PVC-O tsis haum rau cov huab cua txias”

Oriented PVC khaws cov txiaj ntsig cuam tshuam txog li ntawm -20 ° C, whereas cov pa PVC-U yuav pom nkig thaum qhov kub thiab txias mus txog qhov khov. Rau cov haujlwm txias-thaj chaw no feem ntau yog qhov kev txiav txim siab ntawm ob yam khoom. Qhov ntsuas kub tsis tshaj -15 ° C, tuav thiab installation cov txheej txheem tseem yuav tsum tau kho tsis hais cov khoom.

“PVC-O tsis muaj pov thawj mus ntev”

PVC-O tau tsim ua lag luam txij li xyoo 1990s thiab tam sim no tsim nyob rau hauv ntau tshaj nees nkaum lub teb chaws, suav nrog Spain, Australia, Tebchaws Meskas, Canada, Brazil, Colombia, Is Nrias teb thiab Tuam Tshoj. 100-xyoo tsim lub neej thov tau txais kev txhawb nqa los ntawm ISO 9080 extrapolation ntawm hydrostatic test data, tsis yog los ntawm lub hnub nyoog teb ib leeg - tab sis lub cev ntawm cov yeeb nkab ntsia hauv cov kav dej hauv cov dej num tam sim no tseem ceeb heev.

Cov lus nug uas nquag nug

PVC-O sawv cev rau dab tsi?

PVC-O stands rau biaxially Oriented polyvinyl chloride. Cov “O” yog hais txog cov molecular orientation imparted thaum lub sij hawm tsim khoom, nyob rau hauv uas PVC polymer chains yog stretched thiab ua raws nyob rau hauv ob qho tib si lub circumferential thiab longitudinal cov lus qhia.

Yog PVC-O tib yam li OPVC lossis PVCO?

Yog lawm. PVC-O, PVCO, OPVC thiab “Molecularly taw qhia PVC” tag nrho hais txog tib yam khoom. PVCO yog cov ntawv sau feem ntau siv hauv North American cov qauv xws li ASTM F1483 thiab AWWA C909.

Dab tsi yog qhov txawv ntawm PVC-O Class 400, 450 thiab 500?

Tus naj npawb ntawm chav kawm qhia txog cov khoom siv qhov tsawg kawg nkaus uas yuav tsum tau muaj zog hauv feem kaum ntawm MPa nyob rau lub sijhawm 50 xyoo. Chav kawm 400 = MRS 40 MPa, Chav kawm 450 = MRS 45 MPa, thiab Class 500 = MRS 50 MPa. Cov chav kawm siab dua qhia txog cov txheej txheem tswj kev taw qhia zoo dua thiab tso cai rau kev tsim qauv siab dua, uas tso cai rau cov phab ntsa nyias nyias rau tib qhov kev ntsuas siab.

Dab tsi yog PVC-O yeeb nkab diameters thiab kev ntsuas siab?

Hauv qab ISO 16422, PVC-O feem ntau yog tsim los ntawm DN75 txog DN630, nrog cov kab loj dua mus txog DN800 thiab siab dua muaj los ntawm qee cov tuam ntxhab raws li cov qauv hauv tebchaws xws li GB / T 41422-2022. Cov chav kawm siab feem ntau yog los ntawm PN10 txog PN20, nrog PN25 muaj nyob rau hauv qee qhov ntau.

Cov yeeb nkab PVC-O tuaj yeem siv rau cov dej haus?

Yog lawm. PVC-O yog tsim los ntawm tib lub PVC-U compound siv rau cov kav dej, uas tsis muaj plasticisers lossis additives qhia thaum lub sij hawm taw qhia. Nws feem ntau tau lees paub rau kev sib cuag dej hauv qab NSF / ANSI / CAN 61 hauv North America thiab WRAS hauv tebchaws United Kingdom, thiab raws li kev pom zoo ntawm kev nyiam huv hauv tebchaws rau lwm qhov.

Cov txheej txheem dab tsi txhais PVC-O yeeb nkab thoob ntiaj teb?

Cov qauv tseem ceeb yog ISO 16422 (thoob ntiaj teb), IN 17176 (European), ASTM F1483 thiab AWWA C909 (North American), AS/NZS 4441 (Australia/New Zealand), CSA B137.3.1 (Canada) thiab GB / T 41422-2022 (Tuam Tshoj). Lawv txawv nyob rau hauv txoj kab uas hla conventions, tsim coefficients thiab siab tshaj plaws tso cai tsim kev nyuaj siab, yog li tus specification yuav tsum nco ntsoov lub npe tus qauv nws tau sau tawm tsam.

Sib piv PVC-O nrog rau lwm cov khoom siv yeeb nkab

PVC-O tsis tshua muaj nyob rau hauv kev sib cais ntawm daim ntawv qhia tshwj xeeb. Nws feem ntau yog ib qho ntawm ob lossis peb cov ntaub ntawv nyob rau hauv kev xav. Cov lus qhia no suav nrog kev sib piv thiab kev txiav txim siab xaiv uas tuaj yeem tshwm sim feem ntau:

Tus qauv rov tshwm sim: PVC-O yeej qhov chaw siab siab, txoj kab uas hla yog loj, hloov yog kim, los yog cov yeeb nkab yuav tsum kav ntau xyoo lawm. Nws poob qhov twg khiav yog luv thiab ncaj, nyiaj txiag dominates, thiab cov khoom siv tus nqi ib 'meter' yog tib lub metric uas tseem ceeb.

Kauj ruam tom ntej

Yog tias koj tab tom ntsuas PVC-O rau ib qhov project tshwj xeeb, peb cov ntsiab lus uas txiav txim siab cov yeeb nkab yog tsim cov chav kawm siab, xav tau txoj kab uas hla, thiab tus qauv qhov project yog teev tawm tsam. Nrog peb, ib lub chaw tsim khoom tuaj yeem paub meej tias muaj, phab ntsa thickness thiab kev sib koom ua ke tam sim.

Hebei Jiuhe Roj Hmab & Plastic Products Co., ltd.