1. Lo lus nug: Dab tsi yog qhov txheej txheem saum npoo tiav rau koj cov kav dej ERW?
Teb:Peb muab peb qhov chaw saum npoo av:
Dub Finish (Mill Finish):Raws li - dov nrog ntuj oxide nplai. Qhov no yog qhov ntau tshaj plaws thiab kev lag luam tiav rau lub hom phiaj dav dav.
Galvanized (Kub-Dipped):Coated nrog ib txheej ntawm zinc los tiv thaiv corrosion, zoo tagnrho rau kev siv sab nraum zoov xws li laj kab, tes tuav, thiab kab dej.
Bare/Oil-Dipped:Cov yeeb nkab yog pickled kom tshem tawm cov nplai thiab coated nrog lub teeb xeb- tiv thaiv roj rau luv - lub sij hawm tiv thaiv thaum lub sij hawm thauj mus los.
2. Lo lus nug: Koj puas muab cov txheej txheem sab nraud rau kev tiv thaiv corrosion, xws li FBE lossis 3LPE?
Teb:Yog lawm, peb muab cov kev pabcuam tiv thaiv- cov txheej txheem corrosion. Peb tuaj yeem thov:
Fusion Bonded Epoxy (FBE):Ib qho - txheej epoxy txheej rau siab - kev tiv thaiv corrosion, feem ntau siv rau cov kav dej faus.
Peb- Txheej Polyethylene (3LPE) / Polypropylene (3LPP):Lub cev muaj zog uas muaj FBE txheej, cov nplaum copolymer, thiab txheej txheej polyethylene. Qhov no yog tus qauv kev lag luam rau cov roj, roj, thiab cov kav dej xa hluav taws xob uas xav tau kev tiv thaiv siab tshaj plaws.
Coal Tar Enamel (CTE):Rau qhov kev xav tau ntawm qhov project.
Peb xyuas kom meej tias daim ntawv thov txheej ua tiav nyob rau hauv ib puag ncig tswj raws li cov qauv zoo li DIN 30670 lossis CSA Z245.21.
3. Lo lus nug: Koj ua li cas tiv thaiv cov yeeb nkab kawg thaum lub sij hawm thauj mus los thiab cia?
Teb:Kev tiv thaiv zoo kawg yog qhov tseem ceeb los tiv thaiv kev puas tsuaj rau lub bevel. Rau peb cov kav dej ERW, peb muaj ntau txoj kev xaiv:
Txheem:Yooj yim yas kawg kaus mom (snap-on).
Hlau End Protectors:Hnyav-cov haujlwm steel rings welded los yog crimped rau hauv cov yeeb nkab kawg rau hnyav- cov kav dej phwj los yog cov dej hiav txwv ntev.
Haus dej yuav xaus:Rau cov kav me me - txoj kab uas hla, peb tuaj yeem siv cov duab los qhia hnyav lossis hlau "haus dej" style caps.
Peb tuaj yeem hloov kho qhov no raws li koj txoj kev xa khoom (cov thawv ntim khoom sib txawv).
4. Lo lus nug: Koj tus qauv ntev npaum li cas rau cov kav dej ruaj khov - ntev yog dab tsi?
Teb:Rau kev txiav txim siab ntev -, peb ua raws li cov qauv thoob ntiaj teb. Feem ntau, peb ua haujlwm nrog lub siab ntev ntawm+10 hli / -0 mm. Qhov no txhais tau hais tias cov yeeb nkab yuav tsum tsawg kawg yog qhov ntev koj xaj, thiab tuaj yeem ntev txog 10 hli. Yog tias koj xav tau kev nruj dua (piv txwv li, +/- 2mm) rau cov phiaj xwm kev tsim kho, thov qhia rau peb paub yog li peb tuaj yeem hais peb qhov kev txiav txim siab.
5. Lo lus nug: Hom yeeb nkab kawg uas koj muab? Plain, Beveled, lossis Threaded?
Teb:Peb muab tag nrho peb qhov, nyob ntawm qhov kev npaj sib txuas:
Plain End (PE):Square txiav los yog me ntsis chamfered, tus qauv rau welding los yog siv nrog mechanical couplings.
Beveled End (BE):A 30-37.5℃bevel (feem ntau yog 30 degrees rau tus qauv pob tw-vuam) yog siv los pab txhawb kom muaj zog, tag nrho nkag mus rau qhov chaw welds. Qhov no yog qhov ntau tshaj plaws rau kab yeeb nkab.
Threaded thiab Coupled (T&C):Cov xov (feem ntau yog NPT lossis API Round Xov) raug txiav rau hauv cov yeeb nkab kawg, thiab ib qho txuas txuas nrog rau txhua lub yeeb nkab.
