ISO 21809-1-2009 Cov yeeb nkab steel

Taw qhia: ISO 21809-1: 2009 yog dab tsi?

ISO 21809-1: 2009yog tus txheej txheem thoob ntiaj teb lub npe"Petroleum, petrochemical thiab natural gas industries - External coatings for faus los yog submerged pipelines siv nyob rau hauv pipeline tsheb thauj mus los systems - Ntu 1: Polyolefin coatings (3-txheej PE thiab 3-txheej PP).

Hauv cov ntsiab lus yooj yim, tus qauv no qhia txog qhov yuav tsum tau ua rau kev thov, kuaj, thiab ua haujlwm siab -kev ua haujlwm sab nraud ntawm cov kav hlau uas yuav muab faus rau hauv av lossis hauv dej. Nws lub hom phiaj tseem ceeb yog los tiv thaiv corrosion, uas yog ib qho kev hem thawj loj tshaj plaws rau lub sijhawm ntev - kev ncaj ncees ntawm cov kav dej.

Tus qauv tseem ceeb heev rau kev lag luam roj, roj, thiab petrochemical, ua kom muaj kev nyab xeeb, kev cia siab, thiab kev ua neej ntev ntawm kev hla -lub teb chaws thiab cov kav dej hauv qab hiav txwv.

Lub Ntsiab Tseem Ceeb: Peb - Txheej Polyolefin Txheej

ISO 21809-1 cuam tshuam tshwj xeeb nrog ob hom txheej txheem txheej txheej txheej txheem:

3-Layer Polyethylene (3LPE):Feem ntau yog siv rau ntau qhov kub thiab txias, tshwj xeeb tshaj yog nyob rau sab qaum teb thiab tsis tshua muaj kev cuam tshuam ntawm ntug dej hiav txwv.

3-Layer Polypropylene (3LPP):Siv rau siab dua -kev pabcuam kub (piv txwv li, rau cov roj kub lossis roj kab) thiab qhov chaw nruj dua, suav nrog kev siv dej tob.

Tus qauv "Peb-Layer":

Cov txheej txheem no yog cov txheej txheem sib xyaw, qhov twg txhua txheej muaj cov haujlwm tshwj xeeb:

Fusion-Bonded Epoxy (FBE) Primer Layer (Thawj Txheej):

Muaj nuj nqi:Muab zoo heevcathodic disbondment kujthiab adhesion rau cov yeeb nkab steel. Qhov no yog thawj txheej tiv thaiv corrosion.

Nws yog electrostatically sprayed mus rau rhuab, ntxuav steel yeeb nkab thiab kho kom tsim ib tug nyias, tawv zaj duab xis.

Polymer Adhesive Layer (Second Layer):

Muaj nuj nqi:Ua raws li "txhim- txheej" lossis "kua nplaum" txhawm rau khi cov txheej txheej tawv polyolefin rau FBE primer.

Nws yog extruded dua kub, freshly thov FBE.

Polyolefin Topcoat (Thib Thib Peb - PE lossis PP):

Muaj nuj nqi:Muabzoo heev mechanical tiv thaivtiv thaiv kev puas tsuaj, cuam tshuam, thiab kev ntxhov siab hauv av. Nws kuj ua raws li lub cev tiv thaiv kev ya raws thiab tshuaj lom neeg.

Nws yog extruded ncaj qha tshaj lub nplaum txheej.

Cov ntsiab lus tseem ceeb ntawm tus qauv rau cov yeeb nkab steel

Tus txheej txheem yog qhov dav thiab npog tag nrho cov txheej txheem los ntawm kev npaj cov yeeb nkab mus rau qhov kawg tshuaj ntsuam xyuas.

1. Kev npaj nto

Cov yeeb nkab steel nto yuav tsum tau muab ntxuav kom ze rau - cov hlau dawb (Sa 2 ½Raws li ISO 8501-1).

Qhov profile nto (txheej txheem thauj tog rau nkoj) yuav tsum nyob rau hauv ib qho kev qhia tshwj xeeb (piv txwv li, 50-90 µm rau 3LPE, 50-100 µm rau 3LPP) kom ntseeg tau tias qhov zoo tshaj plaws adhesion ntawm FBE.

2. Cov ntaub ntawv

Tus qauv qhia txog cov khoom thiab cov kev xeem tsim nyog rau FBE hmoov, cov nplaum, thiab cov polyolefin (PE lossis PP) granules.

Tag nrho cov ntaub ntawv yuav tsum sib haum nrog ib leeg thiab tsim nyog raws li ib tug ua tiav system.

3. Txheej txheej thov txheej txheem

Tus qauv qhia txog qhov yuav tsum tau ua ua ntej- cua sov cov yeeb nkab, kev siv qhov kub thiab txias, extrusion tsis, thiab cov txheej txheem cua txias kom ntseeg tau tias muaj kev sib raug zoo, siab - txheej zoo.

4. Kev tshuaj xyuas thiab kev sim

Qhov no yog ib feem tseem ceeb ntawm tus qauv, muab faib ua:

Tsis yog -Kev Tshawb Fawb Kev Puas Tsuaj (NDI) ntawm Txhua Cov Yeeb Nkab:

Nyiaj so koobtsheej (Fault) Detection:100% ntawm cov txheej yog kuaj xyuas cov pinholes lossis voids siv lub siab -voltage hnub so detector. Qhov voltage yog teev raws li txheej thickness.

Txheej Thickness:Ntsuas ntawm ib ntus kom ntseeg tau tias nws ua tau raws li qhov xav tau yam tsawg kawg nkaus.

Kev Ntsuam Xyuas Kev Ua Phem Rau Kev Xeem Daim Coupon:

Rau txhua qhov kev khiav haujlwm (piv txwv li, ib qho kev hloov pauv lossis ib 500 kav dej), daim ntawv pov thawj kev xeem yog coated nrog rau cov kav dej ntau lawm.

Daim coupon no yog raug rau lub roj teeb ntawm cov kev ntsuam xyuas los xyuas cov txheej txheem, suav nrog:

Cathodic Disbondment (CD):Ntsuas cov txheej tiv thaiv kev nqa thaum nyob rau hauv kev tiv thaiv cathodic.

Adhesion (Pull-Off Strength):Ntsuas lub zog ntawm kev sib txuas ntawm cov txheej thiab cov hlau.

Impact Resistance:Kuaj cov txheej txheej muaj peev xwm tiv thaiv kev puas tsuaj los ntawm pob zeb lossis tuav.

Indentation Resistance:Ntsuas cov txheej tiv thaiv rau kev nkag mus rau hauv ib qho kev thauj khoom tas li.

Flexibility (Bend Test):Xyuas kom lub txheej tsis tawg thaum lub yeeb nkab yog khoov thaum lub installation.

Vim li cas tus qauv no tseem ceeb heev?

Kev Tiv Thaiv Corrosion:Nws yog lub hauv paus tiv thaiv mechanism rau ntau -billion dollar pipeline tej yaam num.

Ntev:Cov txheej txheem siv tau zoo tuaj yeem txuas lub raj xa mus rau 50 xyoo lossis ntau dua.

Kev nyab xeeb:Tiv thaiv kev xau thiab kev puas tsuaj loj, tiv thaiv ib puag ncig thiab kev nyab xeeb rau pej xeem.

Compatibility nrog Cathodic Protection:Cov txheej txheem txheej yog tsim los ua haujlwm sib koom ua ke nrog kev tiv thaiv cathodic, tsim kom muaj kev tiv thaiv dual.

Ntiaj teb no Benchmark:Nws muab cov lus qhia zoo tshaj plaws thiab qib zoo rau cov yeeb nkab mills, cov neeg thov txheej txheej, thiab cov neeg ua haujlwm kav dej thoob ntiaj teb.

Cov ntsiab lus

ISO 21809-1: 2009yog tus txheej txheem thoob ntiaj teb kawg nkaus rau kev siv siab -kev ua tau zoo 3- txheej txheej polyolefin txheej rau cov kav hlau siv hauv faus lossis submerged kev pabcuam. Nws ua kom ntseeg tau tias cov txheej txheem muab kev tiv thaiv corrosion ntev thiab kev ua haujlwm zoo, uas yog qhov tseem ceeb rau kev nyab xeeb thiab txhim khu kev lag luam ntawm niaj hnub pipeline infrastructure rau kev lag luam roj thiab roj.

Nco tseg:Thaum ua hauj lwm nrog ib qhov project tshwj xeeb, nco ntsoov xa mus rau qhov project specifications, raws li lawv tej zaum yuav muaj xws li ntxiv los yog ntau nruj cov kev cai uas ntxiv rau lub hauv paus ISO qauv.

Specification

Epoxy Primer Coated Pipes Txheej Specification