Nickel Alloy 825 stud bolts fastenersmuab cov kev daws teeb meem txhim khu kev qha rau cov kev xav tau no. Paub tias yog Incoloy 825 los yog UNS N08825, cov nickel no - hlau- cov khoom siv chromium yog tsim los txhim kho qhov sib txawv ntawm cov pa austenitic stainless hlau thiab siab - nqi, ultra- npib tsib xee superalloys.
HT PIPE yog ib tug thawj coj stockist thiab thoob ntiaj teb exporter nrog ntau tshaj 16 xyoo ntawm kev txawj ntse nyob rau hauv thoob ntiaj teb kev lag luam. Peb muab cov kav dej, daim hlau, cov kab tuav, thiab ntau yam ntawm cov yeeb nkab fittings, flanges, thiab li qub.Tiv tauj pebtam sim no rau cov quotes dawb thiab cov ntaub ntawv khoom ntiag tug.
Standard Stainless hlau
Alloy 825 nta ib qho ua tib zoo sib npaug tshuaj profile tsim los tiv thaiv cov neeg ua haujlwm tshuaj lom neeg ua haujlwm matrices. Tsis zoo li cov hlau yooj yim-puag alloys, nws qhov kev ua tau zoo nyob ntawm kev sib koom ua ke ntawm nws cov ntsiab lus me me alloying:
| Element | Qhov hnyav % Ntau | Cov txiaj ntsig tseem ceeb ua rau cov fasteners |
| Nickel (Ni) | 38.0 – 46.0% | Txhaj tshuaj tiv thaiv chloride-induced stress corrosion cracking (SCC); stabilizes ductile austenitic matrix. |
| Chromium (Cr) | 19.5 – 23.5% | Tsav kev tsim ntawm tus kheej - kho cov txheej txheem oxide txheej txheej, tiv thaiv lub fastener los ntawm oxidizing media xws li nitric acid. |
| Hlau (Fe) | 22.0% min | Ua haujlwm raws li cov qauv hauv qab, kom ntseeg tau tus nqi- ua haujlwm tau zoo thaum khaws cov khoom siv zog ntau heev. |
| Molybdenum (hli) | 2.5 – 3.5% | Ua tshwj xeeb hauv cheeb tsam micro-ib puag ncig los tiv thaiv pitting thiab crevice corrosion nyob rau hauv siab -chloride dej. |
| Copper (Cu) | 1.5 – 3.0% | Drastically txo tus nqi corrosion thaum raug rau boiling los yog muaj concentrated sulfuric acid daws. |
| Titanium (Ti) | 0.6 – 1.2% | khi nrog cov pa roj carbon thaum lub sij hawm ua thermal kom tshem tawm chromium carbide nag lossis daus, tiv thaiv intergranular corrosion raws cov ciam teb tom qab vuam lossis kub forging. |
Manufacturing thiab Quality Control Standards
Txhawm rau kom muaj kev nyab xeeb thiab kev ntseeg siab hauv cov ntawv thov tseem ceeb,Nickel Alloy 825 stud bolts fastenersyuav tsum ua raws li cov khoom siv thoob ntiaj teb.
Qhov tseem ceeb ASTM & ASME Specifications
ASTM B425 Cov Lus Qhia:Npog cov qauv kev cai rau npib tsib xee- hlau-chromium- molybdenum- tooj liab alloy pas nrig thiab bar Tshuag siv rau tshuab lossis forge fasteners.
ASTM B564 / ASME SB 564 Cov Lus Qhia:Txhais cov txheej txheem rau kub -forged bolts thiab tshwj xeeb net-shape fastener configurations.
ASME B18.2.1 & B18.2.2:Tswj lub qhov ntev geometric ciam teb rau hnyav hex bolts, stud bolts, thiab cov txiv ntoo sib txuam.
Xov Xwm Txheej: Txiav vs. Rolled Threads
Kev xaiv ntawm cov txheej txheem kev tsim cov xov no cuam tshuam rau lub fastener kev ua tau zoo nyob rau hauv dynamic loads:
Machined / txiav xov:Txiav threads cuam tshuam lub longitudinal grain qauv ntawm forged pas nrig, tawm hauv microscopic cuab yeej cim ntawm lub hauv paus xov uas tuaj yeem ua raws li cov ntsiab lus kev ntxhov siab.
Rolled Xov:Nyiam rau qhov chaw tseem ceeb, xov dov txias- ua cov profile siv siab - siab tuag. Cov txheej txheem no realigns cov lis dej ntws raws cov contour ntawm xov, inducing compressive residual stresses uas txhim kho qaug zog lub neej thiab tsis kam mus rau thread galling.
Ntiaj teb no Engineering Procurement
Kev yuav khoom tshwj xeeb yuav tsum tau ua haujlwm nrog cov tuam txhab tsim khoom thiab cov chaw muag khoom muag uas nkag siab txog cov txheej txheem tswj hwm hauv cheeb tsam thiab cov saw hlau logistical. Nyob ntawm koj qhov chaw ua haujlwm, qhia kom ua raws li cov lus qhia hauv cheeb tsam tsim nyog:
- North America (Houston, TX / Alberta, Canada):Xyuas kom tag nrho cov ntaub ntawv ntsuam xyuas zeb (MTRs) paub meej tias ua rawsNACE MR0175 / ISO 15156rau qaub oilfield deployments, nrog rau nruj raws li ASME Tshooj VIII siab lub nkoj tsim cov cai.
- Teb chaws Europe (North Sea Marine Hubs / Lub teb chaws Yelemees / UK):Kev yuav khoom yuav tsum thov kom muaj traceability tag nrho ntawmEN 10204 3.1 ntawv pov thawjthiab txheeb xyuas kev ua raws li Cov Lus Qhia Cov Khoom Siv Siab (PED 2014/68/EU) cov lus qhia.
- Asia-Pacific (Singapore / Western Australia / India):Tsom ntsoov rau kev txheeb xyuas cov keeb kwm ntawm cov khoom siv raw rau cov ntawv nyoos, lees paub tias cov txheej txheem melting thawj zaug ua tau raws li cov qauv kev tsim khoom raw kom tsis txhob muaj teeb meem micro- cais tawm thaum lub sij hawm forging hauv zos.
Kev txhim kho kev coj ua zoo tshaj plaws thiab kev tiv thaiv kev saib xyuas
Txawm tias siab - alloys kev ua tau zoo tuaj yeem ua tsis tiav ntxov yog tias ntsia tsis raug. Txhawm rau ua kom lub neej ua haujlwm siab tshaj plaws ntawm Alloy 825 bolting systems, ua raws li peb cov lus qhia tseem ceeb:
Tiv thaiv Galling nrog High -Nickel Anti-Seize:Nickel-cov alloys hauv paus yog qhov ua rau txias- vuam (galling) thaum siv lub zog. Ib txwm siv lub siab -purity, npib tsib xee-raws li kev tiv thaiv- txeeb cov roj nplua nyeem rau cov xov. Tsis txhob siv tooj liab- lossis graphite-raws li lubricants hauv marine lossis siab- qhov kub thiab txias los tiv thaiv kev sib cuam tshuam ntawm galvanic lossis carburization.
Siv Txoj Kev Tswj Torque:Kev cia siab rau qhov yooj yim cuam tshuam wrenches tuaj yeem ua rau qhov tsis sib xws ntawm flange loading, ua rau hauv cheeb tsam crevice corrosion los yog kua dej. Siv calibrated hydraulic torque wrenches lossis ntsia liaj qhov rooj -elongation stretch gauges los xyuas kom meej cov pa roj carbon monoxide compression.
Xyuas kom cov khoom sib raug zoo thoob plaws hauv kev sib koom ua ke:Thaum Alloy 825 stud bolts muaj kev tiv thaiv corrosion zoo heev, lawv yuav tsum ua kom zoo sib xws nrog kev sib txuamAlloy 825 hnyav hex ceevthiab washers. Kev sib xyaw ua ke nrog qis dua - qib stainless hlau lossis carbon steel Cheebtsam tuaj yeem tsim cov galvanic cell, ua kom cov hlau tsis zoo.
