Natural gas pipeline yam ntxwv

• Cov yeeb nkab qauv: Cov kav dej roj tau sib sau ua ke los ntawm kev sib txuas cov kav dej ib leeg los ntawm ib qho. Niaj hnub nimno roj sib sau cov kav dej thiab cov kav dej xa hluav taws xob yog ua los ntawm cov kav hlau txuas nrog hluav taws xob vuam. Cov kav hlau muaj xws li cov kav dej seamless, kauv seam kav, thiab cov kav dej ncaj nraim. Seamless kav yog tsim rau cov kav dej uas muaj txoj kab uas hla tsawg dua 529 hli. Kauv seam kav thiab cov kav dej ncaj seam yog tsim rau cov kav dej loj. Cov qauv ntoo khaub lig ntawm kev sib sau ua ke thiab kev thauj mus los yog txheej txheej sab hauv - steel yeeb nkab - txheej txheej rwb thaiv tsev - thermal rwb thaiv tsev (txheej rwb thaiv tsev) txheej; qhov yooj yim yog tsuas yog cov yeeb nkab steel thiab txheej txheej rwb thaiv tsev, thaum cov txheej txheej sab hauv phab ntsa thiab thermal (txheej rwb thaiv tsev) txheej yog ob qho tib si suav tias yog cov txheej txheem kev xa tawm roj tau lees paub.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

• Cov khoom siv yeeb nkab: Cov yeeb nkab steel yog cov khoom tseem ceeb ntawm cov kav dej. Natural gas tsheb thauj mus los steel kav yog tshwj xeeb metallurgical cov khoom tsim los ntawm kev sib sib zog nqus ntawm daim hlau (strips). Vim muaj qhov sib txawv ntawm cov txheej txheem thev naus laus zis, muaj qee qhov sib txawv hauv kev koom ua ke ntawm cov yeeb nkab steel ntawm cov yeeb nkab steel uas tsim los ntawm ntau lub tuam txhab. Hauv xyoo 1960, X52 steel qib feem ntau yog siv, X60 thiab X65 steel qib tau siv nyob rau xyoo 1970s, thiab X70 steel feem ntau yog siv hauv xyoo 1980 thiab 1990s. Cov kav xa hluav taws xob hauv qee lub tebchaws txawv tebchaws tau pib siv X80 steel. Nrog rau kev txhim kho txuas ntxiv ntawm kev tshawb fawb pipeline steel, Canada thiab lwm lub teb chaws tau tso cov ntawv xeem ntawm X100 thiab X120 pipeline steel. Hauv kuv lub teb chaws Ji-Ning tie-line pipeline project, X80 qib yeeb nkab steel tau siv thawj zaug hauv 7.71km xeem seem. Lub 4843km-ntev Thib Ob West-East Gas Pipeline trunk pipeline tag nrho siv X80 qib pipeline steel nrog ib txoj kab uas hla ntawm 1219mm, nce cov roj xa mus rau 12Mpa. Feem ntau hais lus, X80 steel muaj dual-theem qauv ntawm ferrite thiab bainite, X100 yeeb nkab steel muaj ib tug bainite qauv, thiab X120 yeeb nkab steel muaj ultra-low carbon bainite thiab martensite. Rau cov kav dej xa hluav taws xob, lub zog, toughness thiab weldability yog peb qhov kev tswj xyuas zoo tshaj plaws.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

• Pipeline yam ntxwv:

(i) Cov kav dej xa hluav taws xob yog qhov txuas txuas txuas txuas txuas ntxiv.
(ii) Cov pa roj ntsha yog nyob rau hauv siab los ntawm kev thauj mus los, cia rau cov neeg siv khoom.
(ii) Vim yog lub ntiajteb txawj nqus me me ntawm cov pa roj carbon monoxide thauj, qhov cuam tshuam ntawm lub taub hau zoo li qub yog me dua li cov kua. Thaum qhov kev tsim qhov siab sib txawv tsawg dua 200 meters, lub taub hau siab zoo li qub tuaj yeem tsis quav ntsej thiab cov kab yuav luag tsis txwv los ntawm qhov ntev ntev.
(iv) Tsis muaj dej rauj phom sij hauv cov kav dej ua kua.
(v) Thaum muaj xwm txheej tshwm sim, nws yuav muaj kev phom sij heev thiab cuam tshuam rau ntau yam. Thaum lub raj xa dej tawg, nws yuav tso tawm ntau lub zog thiab lub kua muag yuav ntev. Thaum cov pa roj carbon dioxide tawm mus ntsib cov nplaim taws, nws tuaj yeem ua rau hluav taws tau yooj yim.