Qhov 1: Cov ntawv thov ntawm cov yeeb nkab HDPE hauv Dredging
I. Cov ntsiab lus zoo ntawm cov yeeb nkab HDPE (vim li cas xaiv nws?)
Piv rau cov yeeb nkab steel, cov yeeb nkab HDPE muaj cov txiaj ntsig irreplacisable hauv qab no hauv kev siv cov ntawv thov kev poob:
Ua zoo heev tsis kam: cov ntaub ntawv dredged (xws li xuab zeb, gravel, thiab slag) feem ntau yog cov abrasive heev. HDPE cov yeeb nkab tsis kam yog 4-8 zaug ntawm cov yeeb nkab steel, txuas ntxiv hloov cov yeeb nkab lub neej thiab cov nqi txo qis.
Zoo heev corrosion: HDPE muaj cov dej hiav txwv, ua rau nws zoo tagnrho rau kev ua haujlwm hauv marine thiab cov kev mob geological.
Lub teeb yuag thiab hloov tau qhov ceev: nrog qhov ceev tsuas yog 1/8 ntawm cov yeeb nkab steel, HDPE yog qhov yooj yim rau thauj thiab nruab. Nws yooj yim tso cai rau nws hloov mus rau sewbed sepography thiab dej nto nto sib hloov, ua rau nws yooj yim rau kev siv rau kev siv ua cov raj raj nplaim ntab.
Tus sab hauv phab ntsa, muaj kev kub siab ntxiv: Sab hauv phab ntsa ntawm HDPE cov yeeb nkab muaj qhov sib txhuam qis heev, nrog cov yeeb nkab tshiab. Qhov no cuam tshuam rau kev xa khoom tawm tsam, txo kev noj hluav taws xob, thiab txhim kho kev siv nyiaj txuas ntxiv.
Cov kev cuam tshuam zoo heev: txawm nyob hauv qis - pa dej ib puag ncig, HDPE yeeb nkab tswj tau zoo heev cuam tshuam.
Kev sib txuas tau zoo tshaj plaws: siv pob tw fusion lossis eliminating lub zog sib txuas, ua tiav cov dej xau thiab cov yeeb yaj kiab cov teeb meem cuam tshuam nrog cov kev sib txuas hauv Flange.
Cov nqi qis npaum li cas: thaum tus nqi yuav nqi ib lub ntsuas hluav taws xob, nws cov nqi qis dua, nws cov nqi qis dua, thiab cov nqi them qis rau cov neeg siv hluav taws xob tsawg dua (LCC) deb dua rau cov yeeb nkab steel.
Ii. Cov ntawv thov MAIN
Hauv cov phiaj xwm dredging, HDPE cov yeeb nkab yog cov categorized rau hauv peb hom raws nws qhov chaw teeb tsa thiab ua haujlwm:
Floating Pipeline (Region Pipeline)
Lub Hom Phiaj: Txuas cov dredger rau ntug dej hiav txwv, ntab saum nplaim dej.
Tus qauv: muaj ib lub kav dej HDPE koom ua ke los ntawm kub {} yaj hauv cov yeeb nkab buoyt (}}
Cov txiaj ntsig zoo: lub teeb yuag thiab qhov hnyav ntawm cov yeeb nkab HDPE ua rau nws zoo rau cov kav dej ntab, cia nws nce nrog vuag thiab tau yooj yim cab thiab xa tawm.
Submerged pipeline
Lub Hom Phiaj: Tso rau ntawm tus dej ntws lossis dej hiav txwv, siv rau kev hla dej lossis hauv thaj chaw tsis tsim nyog rau cov yeeb nkab ntab.
Daim Ntawv Thov: kav yuav tsum muaj kev ruaj ntseg mus rau hauv qab vim lawv tus kheej tsis zoo buoyancy lossis nyab xeeb nrog briquettes. Qhov yooj thiab corrosion tsis kam ntawm HDPE cov yeeb nkab ua kom nws zoo-}}} haum rau cov chaw tso dej sub submarine.
Ntug dej hiav txwv (onshore pipeline)
Lub Hom Phiaj: Qhov txuas ntxiv ntawm dej mus rau thaj av, thauj slurry rau ib qho chaw khaws khoom lossis pov tseg.
Daim ntawv thov: Feem ntau nteg ncaj qha rau saum npoo lossis ntiav poob qis hauv av. Hnav Kuj Tshwj Xeeb yog qhov tshwj xeeb tshaj yog nyob ntawm no, raws li kev txij nkawm thiab hloov yog yooj yim dua onshore tshaj ntawm cov dej.
III. Txoj kev txuas
Taub qab Fusion: Thawj hom kev sib txuas tau zoo thiab tshaj plaws. Cov phaj tshwj xeeb melts cov yeeb nkab xaus, tom qab ntawd sai sai rau lawv ua ke thaum lub siab. Tom qab txias, ib qho {- daim txuas yog tsim, nrog lub zog sib piv rau ntawm cov kav dej lawv tus kheej. Haum rau loj- txoj hauj lwm uas hla.
Kev siv hluav taws xob: Siv los kho lossis txuas cov kav dej ntawm cov kev sib txawv. Cov kav dej muaj cov hlau sab hauv, uas ua kom cov kav dej ntws thiab cov fittings nrog hluav taws xob, fusing lawv ua ke.
Flange: Siv tsuas yog thaum cuam tshuam nrog cov khoom siv hlau xws li cov khoom siv nkoj, twj, thiab qub. Tshwj xeeb HDPE flance sib txuas txuas yog siv.
Ntu II: Hdpe Dredging Yeeb Nkab Tu
Txawm hais tias cov yeeb nkab HDPE tsis muaj zog heev, kev txij nkawm tsim nyog yog qhov tseem ceeb los ua kom nws muaj kev nyab xeeb ntev thiab ua haujlwm tau zoo.
I. Ua haujlwm txhua hnub thiab txij nkawm
Kev tshuaj xyuas:
Floating kav dej: Txhua hnub tshuaj xyuas cov ntab rau kev puas tsuaj, xau, lossis ploj, thiab tshawb xyuas cov yeeb nkab deformation, khawb, lossis hnav. Soj ntsuam pob qij txha rau looseness lossis txeej.
Ntug dej / submersible kav: nquag tshuaj xyuas cov kev txhawb nqa thiab kev txhim kho rau kev ua kom ruaj, thiab tshawb xyuas cov yeeb nkab, tshwj xeeb yog cov pob qij txha, rau hnav.
Kev tu (pigging):
Tom qab so los yog ua tiav kev ua haujlwm, yaug cov yeeb nkab nrog cov dej huv thiab ua rau muaj teeb meem kom tiv thaiv kom tsis txhob muaj kev cuam tshuam los ntawm kev sib tw tom ntej no- Up.
Kev tu ib txwm nrog npua tshem tawm cov silt thiab sediment adhering rau yeeb nkab sab hauv, tswj cov khoom xa tuaj zoo.
Cov ntaub ntawv: Muaj cov ncauj lus qhia ntxaws ntxaws ntxiv, sau cov ntaub ntawv ntawm txhua seem ntawm cov yeeb nkab, thiab cov hnav thiab kua muag, los pab txhawb txoj kev tswj txoj kev tswj hwm lub neej thiab kev sib hloov.
Ii. Kev kuaj xyuas tsis tu ncua thiab kev tshuaj xyuas
Phab ntsa tuab ntsuas kev ntsuas: Siv cov txheej txheem ultrasonic tuab siv tas li ntsuas cov phab ntsa tuab ntawm cov chaw tseem ceeb (xws li pob tw tseem ceeb) los saib xyuas hnav. Tsim ib daim duab trend kom twv xyuas lub neej pabcuam uas tseem tshuav.
Kev Ntsuam Xyuas Kev Pom: Ua tib zoo soj ntsuam sab hauv thiab sab nraud ntawm cov yeeb nkab rau kev sib sib zog nqus khawb, txiav, lossis hauv zos ntau dhau los. HDPE muaj qhov zoo khawb tiv taus, tab sis kev sib sib zog nqus tsis tshua muaj peev xwm ua tau qhov kev ntxhov siab tawg.
Kev Kuaj Siab: Yog hais tias cov raj ntsuas kev ncaj ncees tsis muaj kev tsis ntseeg, kev ntsuas siab tuaj yeem ua los tshawb xyuas cov kab lossis cov ntsiab lus tsis muaj zog.
III. Kev puas tsuaj thiab kho
Hnav:
Kev Tiv Thaiv: Nquag hloov cov yeeb nkab (tshwj xeeb yog cov yeeb nkab nplawm) rau tusyees tawm tsam hnav.
Kho: Rau qhov chaw nyob loj hauv zos, txiav tawm cov ntu uas tsis zoo thiab hloov nws nrog cov ntu tshiab uas siv cov cua sov {{fusion taub qab vuam vuam. Rau qhov loj - cov yeeb nkab uas hla, HDPE thaj panels kuj tseem siv tau rau kev kho vaj tsev sab nraud.
Punctures lossis tawg:
Kho: Cov qhov me me tuaj yeem kho tau siv hluav taws xob fusion lub tes tsho. Cov kab nrib pleb feem ntau yuav tsum txiav tawm cov ntu uas puas thiab hloov nws nrog ntu tshiab.
Dauv Float:
Kho lossis hloov cov khoom tawg kom sai kom ntseeg tau cov yeeb nkab ntab tau muaj cov yeeb nkab txaus thiab tiv thaiv cov yeeb nkab los ntawm kev ntxhov siab los ntawm kev ntxhov siab ntau dhau.
Txi ntawm pob qij txha:
Yog tias kev xau tau pom, lub twj tso kua mis yuav tsum nres tam sim ntawd kho nws. Qhov no feem ntau yuav tsum txiav tawm cov sib koom ua ke uas twb muaj lawm thiab rov ua- yaj.
IV. Cia thiab Txij Nkawm
Kev ntxuav tu: kom huv huv cov phab ntsa sab hauv thiab sab nrauv ua ntej cia.
Ib puag ncig: Khaws rau ntawm ib qho chaw tiaj tiaj dawb dawb ntawm cov khoom ntse, UV ray dedging HDPE pipes muaj UV inhibitors, npog tau pom zoo). Cia kom deb ntawm cov khoom cua sov.
Txoj kev: cov kav dej ncaj yuav tsum khaws cia kab rov tav thiab kev txhawb nqa, thiab pawg hauv cov khaubncaws sab nraud povtseg. Lub coiled yeeb nkab hluav taws xob yuav tsis muaj tsawg tshaj li qhov uas tau tso cai uas tau muab tso ua ke tsawg kawg nkaus.
Lub ntsiab
HDPE cov yeeb nkab, nrog nws cov txiaj ntsig sib xyaw ua ke ntawm kev coj tawm, teeb tsa lub zog loj, tau dhau los ua cov ncej ntawm cov khoom lag luam niaj hnub ua rau kev lag luam niaj hnub. Nws cov ntawv thov tau zoo tsis tsuas txhim kho kev ua haujlwm tau tab sis kuj tseem txo qhov project operating thiab tu cov nqi.
Txhawm rau ua kom ntau tshaj tus nqi ntawm cov yeeb nkab HDPE, cov ntsiab cai ntawm "kev xaiv kho, thiab kev saib xyuas kev tsim kho" yuav tsum yog adhered rau. Tsim cov txheej txheem tshuaj xyuas txhua hnub, kev soj ntsuam txhua hnub, thiab kev tiv thaiv kev ua haujlwm yog qhov tseem ceeb los ua haujlwm nyob ntev thiab ruaj khov ntawm Dredging Pipelines. Nrog kev nce qib tas mus li hauv cov khoom siv thev naus laus zis thiab cov kev sib txuas ntawm cov khoom siv HDPE hauv kev lag luam Dredging yuav txuas ntxiv mus ntxiv.