Lub ceg ntev ntawm cov yeeb nkab tiv thaiv sab nraud ntawm lub rwb thaiv tsev yeeb nkab thaj yog tsis kho; tus qauv qhia meej meej nws. Qhov ntev no ncaj qha txiav txim siab cov nyhuv sealing ntawm thaj.
Raws li GB/T 50538-2020 "Technical Standard for Anti-corrosion and Insulation Layers of Buried Steel Pipelines," thaum kho cov txheej txheem tiv thaiv, yog tias qhov kawg tsis muaj cov qauv tsis muaj dej tsis zoo, qhov sib tshooj ntawm cov cua sov shrink daim kab xev thiab rwb thaiv tsev yeeb nkab tiv thaiv txheej yuav tsum tsis pub tsawg tshaj 100mm; Thaum kawg muaj cov qauv tsis muaj dej tsis zoo, cov kab xev hluav taws xob yuav tsum npog lub hau, thiab qhov sib tshooj nrog cov rwb thaiv tsev thaiv txheej yuav tsum tsis pub tsawg dua 80 hli. Lub voj voog sib tshooj yuav tsum nyob rau ntawm thaj chaw saum toj kawg nkaus ntawm cov kav dej, nrog qhov sib tshooj dav tsis pub tsawg dua 80mm.
Qhov sib tshooj ntawm cov pwm pwm thiab cov txheej txheem tiv thaiv kuj muaj cov cai, uas yuav tsum tsis pub tsawg tshaj 100 hli. Yog tias siv hluav taws xob kub-tev lub tes tsho yog siv, qhov sib tshooj dav nrog lub rwb thaiv tsev yeeb nkab tiv thaiv txheej yuav tsum tsis pub tsawg dua 100 hli. Cov kev cai no tsis yog kev txiav txim siab - yog tias qhov sib tshooj luv dhau, qhov chaw sib khi tsis txaus, ua rau tawg thiab dej nkag ntau dua; Yog tias qhov sib tshooj ntev dhau lawm, nws ua rau cov nqi khoom thiab kev tsim kho nyuaj. Qhov tseem ceeb ntawm 100mm thiab 80mm yog qhov tsim nyog muaj txiaj ntsig los ntawm kev ua haujlwm engineering.
Qhov tseem ceeb ntawm lub puab tsaig ntev yog los xyuas kom meej sealing kev ntseeg tau. Lub puab tsaig sib koom ua ke ntawm cov cua sov-shrink daim kab xev los yog hluav taws xob yaj lub tes tsho thiab cov yeeb nkab tiv thaiv sab nrauv yog qhov tseem ceeb ntawm lub foob foob. Yog tias qhov ntev ntawm lub puab tsaig tsis txaus, lub tshav kub - daim kab xev shrink yog yooj yim rau detachment vim thermal expansion thiab contraction thaum lub sij hawm cov yeeb nkab ua hauj lwm, tso cai rau cov dej hauv av nkag mus rau hauv lub overlap seam. Qhov ntev ntawm qhov sib tshooj ntawm qhov sib tshooj, qhov kev ntseeg tau ntau dua lub foob thiab qhov muaj zog tiv thaiv thermal hloov pauv.
Kev tswj ntawm txoj hlua ntev thaum lub sij hawm tsim kho feem ntau yog nyob ntawm ob yam: ua ntej, xaiv cov cua sov shrink daim kab xev los yog hluav taws xob tshav kub yaj lub tes tsho specifications uas phim cov kab uas hla ntawm lub txheej tiv thaiv raj; Thib ob, kom ntseeg tau tias tsis sib xws ntawm lub tshav kub shrink daim kab xev thiab niaj hnub yaj dhau ntawm cov npoo thaum tsim kho. Tus qauv suav nrog qhov ntev ntawm lub puab tsaig hauv kab lus los muab lub hauv paus rau qhov tseem ceeb no.