Stainless hlau bolts los yog siab zog alloy steel bolts rau stainless hlau flanges? Ntau cov khoom ntawm petrochemical tej yaam num nyob rau hauv kev tsim kho xaiv stainless hlau bolts thiab ceev los yog carbon los yog alloy steel bolts yog nyuaj, vim hais tias kev sib cuag ntawm cov bolts thiab stainless hlau flanges yuav ua rau tsis muaj zog corrosion thiab xeb, sab kev tsim kho muaj ntau yam tsis txaus siab. Puas yog stainless hlau flanges yuav tsum mus nrog stainless hlau bolts?
Txhawm rau txheeb xyuas stainless hlau flanges, koj puas xav tau stainless hlau bolts thiab txiv ntseej lossis carbon steel bolts thiab txiv ntoo lossis qib siab alloy steel bolts thiab txiv ntoo?
1. Raws li txoj kev xav qaug zog, vim qhov tsis muaj zog ntawm cov ntsia hlau stainless, yog li kev siv mus ntev yuav ua rau muaj kev phom sij loj heev ntawm kev qaug zog tam sim ntawd ntawm lub ntsia liaj qhov rooj. Gb50316-2000 (2008) version "industrial hlau piping design code" tsab xov xwm 5.8.7: Nyob rau hauv lub caij tsheb kauj vab hnyav, bolts los yog ob lub taub hau bolts siv nyob rau hauv flange pob qij txha yuav tsum tau ua los ntawm hlau alloy. Nyob rau hauv lub voj voog loj, yog tias tsis siv lub zog siab alloy steel bolts, ces siv lub zog qis stainless hlau bolts thiab lwm yam.
2. Cov nqe lus 4.0.1 thiab 4.0.2 ntawm HG/t20634-2009 "steel yeeb nkab flanges fasteners" qhia meej tias 304 thiab 316 stainless hlau bolts uas ua tau raws li GB / T1220 tus qauv yog cov tsis muaj zog bolts. Siv tsuas yog CL150 / CL300 flanges tau nruab nrog cov tshuab ntxhua khaub ncaws tsis yog xim hlau. Yog vim li cas yog: qhov txwv preload uas tsis tshua muaj zog bolts tuaj yeem tiv taus, cov qib siab siab dua thiab flanges nrog kev nruj dua lossis cov khoom siv hlau thiab cov hlau nplaum uas muaj zog dua tuaj yeem siv vim qhov tsis txaus. Tsis muaj sealing nyhuv. HG / t20635-2009 "cov kev cai rau kev xaiv cov yeeb nkab steel flanges, ntxhua khaub ncaws thiab fasteners" ntu 3.3.7: tsis tshua muaj zog fasteners tsuas yog siv thaum lub siab ntsuas tsawg dua los yog sib npaug rau CL300, kev siv cov hlau tsis yog hlau sib txuas flange pob qij txha yuav tsum tau siv nruj me ntsis raws li cov xwm txheej.
Cov ntsiab lus: Stainless hlau flanges yuav tsum tau txhawb kev siv stainless hlau bolts, nyob rau hauv petrochemical teb uas muaj corrosion thiab muaj zog acids thiab muaj zog alkalis yuav tsum xaiv stainless hlau bolts thiab ceev, stainless hlau muaj zoo anti-oxidation thiab anti-corrosion muaj peev xwm, tab sis stainless hlau bolts rau tsawg zog bolts yog siab zog bolts yuav tsum tau tej zaum stainless hlau bolts yuav siv tsis tau; Feem ntau cov yeeb nkab teb yog tias koj xav txuag nqi, koj tuaj yeem xaiv cov bolts ntau. Cov teb uas tsim cov kev sib txuas muaj zog yuav tsum siv qib 8.8 lossis siab dua cov bolts muaj zog. Nyob rau hauv cov nqe lus ntawm lub zog qib, lub zog siab bolts tau dhau los siv dav, thiab 10.9s ob qib siv tau siv ntau, ntawm 8.8 thiab 10.9 feem ntau. Lub zog qib ntawm cov ntsia liaj qhov rooj yog qis dua, feem ntau 4.4, 4.8, 5.6. Tsis muaj zog corrosion tshwm sim los ntawm kev sib cuag ntawm alloy steel bolts thiab stainless hlau flanges. Rau qhov teeb meem no, xws li tseem ceeb sealing, kev sib cuag ncaj qha ntawm stainless hlau thiab lwm yam steels yuav tsum nruj me ntsis zam.
