Umbhobho we-API vs 3PE Umbhobho

Kwiiprojekthi zobunjineli ezinkulu ezifana neoyile, igesi yendalo, kunye nonikezelo lwamanzi lukamasipala, imibhobho isebenza njengondoqo wenkqubo yothutho, kwaye ukhetho lwabo lumisela ngokuthe ngqo ukhuseleko lweprojekthi, uqoqosho kunye nokuqina. Umbhobho we-API kunye nombhobho we-3PE, iimveliso ezimbini zepayipi ezisetyenziswa ngokubanzi, zihlala zibekwe phambili ngamaqela obunjineli. Nangona kunjalo, zahluke kakhulu kwimigangatho yoyilo, iimpawu zokusebenza, kunye neemeko ezifanelekileyo. Ukuqondwa ngokucokisekileyo kweempawu zabo kubalulekile ekuphuculeni umgangatho weprojekthi.

Inkcazo kunye neemeko zeSicelo esingundoqo

Umbhobho we-API, omfutshane othi "American Petroleum Institute Standard Steel Pipe," uveliswa ngokuhambelana nemigangatho yamazwe ngamazwe efanaAPI 5L umbhobho yentsimbi. Yakhiwe ngentsimbi ephezulu yokuqina kwaye yenziwe ngokuqengqeleka komthungo okanye iinkqubo ze-welding. Amandla ayo angundoqo alele kuxinzelelo oluphezulu kunye nokomelela kwayo, okwenza ukuba isetyenziswe ngokubanzi kwizicelo zoxinzelelo oluphezulu ezifana nemibhobho ye-oyile ekude kunye nerhasi kunye ne-shale gas wellhead manifolds. Ukuzinza kwayo kwesakhiwo kumaqondo okushisa aphezulu ukusuka kwi -40 ° C ukuya kwi-120 ° C kwenza kube yinto ephambili yokuthutha amandla.

Umbhobho we-3PE umele "umbhobho wensimbi onemigangatho emithathu ye-polyethylene yokuchasana nokubola." Isebenzisa umbhobho oqhelekileyo wentsimbi njengesiseko, uqatywe ngesakhiwo esine-anti-corrosion enemigangatho emithathu ebandakanya i-epoxy powder coating (FBE), i-adhesive, kunye ne-polyethylene. Uyilo lwalo oluphambili lujolise ekukhuselweni kwe-corrosion, ukwandisa kakhulu ubomi benkonzo yombhobho ngokuhlukanisa i-microorganisms yomhlaba kunye ne-electrolytes kwisiseko sombhobho wensimbi. Kwiimeko ezingqonge iindawo ezinokonakala ezifana nonikezelo lwamanzi lukamasipala, ukucocwa kwelindle, kunye nokuthuthwa kolwelo lwekhemikhali, umbhobho we-3PE unokufikelela kubomi benkonzo obungaphaya kweminyaka engama-50, nto leyo eyenze ukuba ibe sisisombululo esingqiniweyo sokulwa nokubola kulwakhiwo lwemibhobho engaphantsi komhlaba.

Uthelekiso loMsebenzi oPhambili

Ukususela kumbono ongundoqo wokusebenza, iipayipi ezimbini zihluke ngokucacileyo kwindawo yazo. Ngokubhekiselele kwiipropati zomatshini, umbhobho we-API ngokubanzi unamandla okuvelisa ngaphezu kwe-355 MPa, kunye namanye amabakala aphezulu (afana neAPI 5L X80) ukufikelela kwi-555 MPa, ekwaziyo ukumelana noxinzelelo lokusebenza olungaphezu kwe-10 MPa. Umbhobho we-3PE, ngakolunye uhlangothi, uthembele ngokukodwa kwisiseko sombhobho wensimbi ukuze uqine, kwaye i-anti-corrosion layer ngokwayo ayinakho ukunyanzeliswa koxinzelelo, okwenza kube yinto efanelekileyo yokuthutha i-medium and low-pressure transportation (ngokuqhelekileyo ≤4 MPa).

Imibhobho ye-3PE inenzuzo enkulu kakhulu ekuxhathiseni ukubola. Ulwakhiwo lwabo olunemigangatho emithathu lwenza umqobo ombini "wokuhlukaniswa ngokomzimba + ukukhuselwa kweekhemikhali." Uvavanyo lwesitshizi setyuwa lubonisa ukuba izinga lokudleka kwazo yi-1/50 kuphela yombhobho oqhelekileyo wentsimbi. NgelixaImibhobho ye-APIzinokukhuselwa kwi-corrosion ngokusebenzisa i-galvanizing kunye nokupeyinta, ukusebenza kwazo kwiindawo ezingcwatywe okanye ngaphantsi kwamanzi kusengaphantsi kwe-3PE imibhobho, efuna iinkqubo zokukhusela ezongezelelweyo ze-cathodic, ezinyusa iindleko zeprojekthi.

IziCwangciso zokuKhetha kunye neeNdlela zoShishino

Ukukhethwa kweprojekthi kufuneka kuhambelane nomgaqo "weemeko ezifanelekileyo": Ukuba i-medium yokuhambisa i-oyile okanye igesi ephezulu yoxinzelelo, okanye indawo yokusebenza ifumana ukuguquguquka okukhulu kweqondo lokushisa, iipayipi ze-API zikhethwayo, kunye namanqanaba ensimbi afana ne-X65 kunye ne-X80 ehambelana nomlinganiselo woxinzelelo. Kumanzi angcwatywayo okanye ukuthuthwa kwamanzi amdaka amachiza, iipayipi ze-3PE ziyindlela yoqoqosho ngakumbi, kwaye ubukhulu be-anti-corrosion layer kufuneka bulungiswe ngokwenqanaba lokubola komhlaba.

Indlela yangoku yoshishino ibhekiselele "kukudibanisa ukusebenza." Ezinye iinkampani zidibanisa izinto ezisisiseko eziphezulu zombhobho we-API kunye ne-3-layer anti-corrosion structure ye-3PE yombhobho ukuphuhlisa "umbhobho odibeneyo ochasene ne-corrosion." Le mibhobho ihlangabezana neemfuno zokusasazwa koxinzelelo oluphezulu kunye nokukhuselwa kwe-corrosion ixesha elide. Le mibhobho sele isetyenziswa ngokubanzi kwimveliso yeoli yolwandle kunye nerhasi kunye neeprojekthi zokuphambukisa amanzi kwisitya esiphakathi. Le ndlela entsha ibonelela ngesisombululo esingcono sobunjineli bemibhobho.