Cov khoom
Anticorrosion rau Petroleum Pipeline
Specification
DN50-DN1420 hli
3LPE: peb txheej polyethylene
2LPE: ob txheej polyethylene
FBE: ib txheej epoxy hmoov
2FBE: ob txheej epoxy hmoov
Anticorrosive Txheej Thickness ntawm 3LPE
| DNNominal Dia | Epoxy txheej(μm) | Adhesive Txheej(μm) | Tag nrho cov txheej thickness (mm) | |
| (mm) | Normal(n) | Kev txhawb zog (v) | ||
| DN≤100 | ≥120 | ≥170 | 1.8 | 2.5 |
| 100 | 2.0 | 2.7 | ||
| 250 | 2.2 | 2.9 | ||
| 500≤DN <800 | 2.5 | 3.2 | ||
| DN≥800 | 3.0 | 3.7 | ||
Cov kav dej ntawm cov kav dej roj feem ntau yog cov kav hlau, uas txuas nrog vuam thiab flanges thiab lwm yam khoom siv txuas nrog cov kav dej ntev, thiab cov li qub yog siv rau kev qhib thiab kaw kev tswj thiab kev khiav dej num.Roj pipeline feem ntau muaj isothermal kev thauj mus los, kev thauj mus los ntawm cua sov thiab kev thauj mus los thiab lwm yam thev naus laus zis.Corrosion ntawm cov raj xa dej thiab yuav ua li cas tiv thaiv corrosion yog ib qho tseem ceeb ntawm kev kho cov kav dej.Vim tias cov roj muaj leej faj thiab cov kua qaub, thiab cov kav dej tau nthuav tawm hauv qhov chaw qhib los ntawm cua thiab los nag, cov kav dej yuav yooj yim rau corroded.Pipeline corrosion feem ntau muaj cov hauv qab no: steel oxygen corrosion los ntawm lub hauv paus ntsiab lus ntawm galvanic cell;Hydrogen evolution corrosion vim acid nag los ntawm acidic sulfides (sulfur dioxide thiab hydrogen sulfide) ntawm cov kav dej;Carbon dioxide acid corrosion tshwm sim los ntawm atmospheric nag lossis daus;Cov kab mob corrosion tshwm sim los ntawm cov kab mob uas tuaj yeem metabolize sulfate ntawm cov kav dej thiab corrosion los ntawm cov dej hauv cov kav dej.
Cov yeeb nkab siv rau cov roj kav dej yog cov yeeb nkab carbon steel, uas tuaj yeem muab faib ua seamless steel yeeb nkab thiab welded steel yeeb nkab raws li nws cov txheej txheem tsim khoom.Seamless steel yeeb nkab muaj cov yam ntxwv ntawm lub zog siab, ntau yam tshwj xeeb, yog li nws tsim nyog rau cov khoom siv roj corrosive lossis kub kub.Seamless steel yeeb nkab yog muab faib ua kub dov thiab txias kos ob yam.Vim tias cov txheej txheem kev kos duab txias yuav ua rau cov khoom tawv tawv, nws tseem yuav tsum tau ua cov kev kho cua sov sib xws raws li kev siv cov yeeb nkab tshwj xeeb.Welded steel yeeb nkab tuaj yeem muab faib ua ob hom: seam steel yeeb nkab thiab poob welded yeeb nkab.Vim cov txheej txheem cov yam ntxwv ntawm cov yeeb nkab steel, hom yeeb nkab steel no yooj yim los ua nkig ntawm qhov kub thiab txias, yog li nws yog qhov tsim nyog rau cov kav dej kub ib txwm siv, qhov kub ntawm cov yeeb nkab yuav tsum tsis pub tshaj 300 degrees Celsius, feem ntau hais lus, Kev siv kub ntawm cov pa roj carbon zoo tib yam yog nruab nrab ntawm 0 txog 300 degrees Celsius.Yog tias siv cov yeeb nkab zoo carbon steel, qhov kub thiab txias ntawm - 40 txog 450 degrees Celsius.
