FastenerHelpArticles

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  • FastenerHelpArticles

    Precio : Gratis

    Publicado por : CNBM64

    Publicado en : 28-10-21

    Ubicación : A Coruña

    Visitas : 22

    Sitio web : https://www.sanxinherbs.com



    FastenerHelpArticles

    FastenerHelpArticles

    Youmayhaveheardof"BlueBoltCoating",itsrealnameisWhitfordXylan?Coating...anditisn'talwaysblue.Manyofourcustomersaskforthe"BlueBoltCoating",butwhatexactlyisXylanandwhenshoulditbeused?

    Xylanisablendoffluoropolymers,engineeringplasticsandselectedcorrosioninhibitorswhich,whencombined,createthesecharacteristicsinfasteners:

    Lowfriction

    Exceptionaladhesion


    Unusualresistancetowearandabrasion


    Excellentcorrosionresistance

    Resistancetochipping


    Resistancetotheweather,sunlightandsaltwater

    Xylan'sversatilityisbestdemonstratedasacoatingforstudBoltsandnuts,whereitprovidesunparalleledperformanceineaseofinstallation,corrosionresistanceandeaseofremoval.Itcanbeusedonstandardalloysteelnutsandbolts,orcanbepairedwithstainlesssteelfastenersforevenmorebenefits.


    Xylanfastenercoatingsor"BlueBoltCoatings"aretypicallyspecifiedinoilandwaterworksapplications.


    Abolt’sfunctionessentiallyboilsdowntoapplyingahighenoughHoseClampsforcethatwhenexternalforcesareapplied,transversemovementandseparationcannotoccur.Usingcalibratedtorquetoolstotightenfastenersandapplythatclampforceisfarsuperiortogoingbytheuser’sjudgementorfeeling.Or,asoneseniortechniciancallsit“TheOneGruntorTwoGruntsMethod”.Measuringtorquealone,however,doesnotensureaproperinstallation.


    1.TorqueisanindirectindicatorofTension.


    Torqueisthemeasurementoftwistingforceneededtothreadthefastenerstogether.


    2.Tensionistheforcethatactuallyholdsanassemblytogether.Putanotherway:


    Aboltcanstretchsimilartoaspring,asitbecomestightenedonceallthepartsoftheassemblyarebroughttogether.


    Thehigherthetorqueappliedtothefastener,themoretensioniscreatedastheboltstretches.


    Ifaboltislikeaspringandmoretorqueequalsmoretension,whydoesnotacertainamountoftorquealwaysresultinthesameamountoftension?


    Thoughtherelationshipbetweentorqueandtensionislinear,manyotherfactorscanaffectthisrelationship.Someofthesefactorsincludesurfacetexture,rust,oil,debris,materialtype,lockingelementsandhumanerror.Becauseofthesevariables,tighteningtoaspecifictorquesettingcancreatevariedresultsinthefieldorontheassemblyline.


    GeneralcommoditycommercialfastenersdonotfallundertheumbrellaofproductsthatwouldrequireaULlistingorICC-ESreport.Therearethreemaingoverningbodiesthatcoverspecificationsforfasteners.ASTM(AmericanSocietyforTestingandMaterials)coversprimarilyboltsandfastenersforconstructionapplications.SAE(SocietyofAutomotiveEngineers)coversfastenersforautomotive,machinery,andOEMapplications.ASME(AmericanSocietyofMechanicalEngineers)standardsB18.2.1andB18.2.1coverdimensionaltolerancesforsquareandhexheadbolts,Screws,andNuts.MudgeFastenersprovidesfastenerstothesethreesetsofspecifications(ASTM,SAE,andASME).AfourthspecificationgroupthatisalsoapplicableisAASHTO(AmericanAssociationofStateHighway&TransportationOfficials).AASHTOspecificationsaretypicallyonlycalledoutonhighwayprojectsandmanyAASHTOdesignationscanbedirectlyconvertedtoanASTMequivalent.


    ICC(InternationalCodeCouncil)istheprimarygoverningbodyresponsibleforwritingandmaintainingbuilding,plumbing,mechanical,andfirecodesadoptedbylocalandstatemunicipalities,andthefederalgovernment.ICC-ES(InternationalCodeCouncil-EvaluationServices,Inc.)isthebranchofICCresponsibleforperformingtechnicalevaluationsofbuildingproducts,components,methods,andmaterialstoensurethattheymeettherequirementsofthecodes.ThisevaluationprocessculminatesinanICC-ESreportthatprovidesevidencethattheevaluatedproductorsystemmeetscoderequirements.However,inthecaseofmostanchorboltsandfasteners,theapplicablesectionsofthecodes(InternationalBuildingCode,InternationalResidentialCode,InternationalPropertyMaintenanceCode,Etc.)directyoutotheASTMspecificationscoveringsaidAnchorsorfasteners.AstheASTMspecificationsalreadycoveranchorboltsandfastenersindetail,thereisnoreasonforICCtowritetheirownspecificationsfortheseitems.Forthesamereason,ICC-ESdoesnotneedtoperformevaluationtestingofanchorboltsorfasteners.AslongastheboltsmeettheapplicableASTMspecification(s),theywillmeettheapplicableCodesection(s).


    WhenyouareshorteningboltorThreadedRodswithahacksaw,youalwaysmanglethethreadsatthesawnend,makingitdifficulttogetanutthreadedontoit.ReaderLarryLeMasterstipproducesamuchbetterending.Threadtwonutsontotheboltatthecutoffspot,tightenthemagainsteachother,thensawagainsttheshouldertocreateacleanright-angledcut.Next,loosenthenutsandfileaslightbevelaroundtheendtoclearburrscreatedbysawing.Thenspinoffthenutstocleanandrealignthethreads.Yourshorterboltwillworkjustlikeanewonefromthebox.


    Thereareseveraldistincttypesoffastener,whichmaybereferredtoasapin.Theseincludesmallheadlessnails,sharpenedpinsusedforholdingfabricswhilesewing,attachingpapertopinboardsandthelike,andseveraltypesofmechanicalfasteners.Pinsareanunthreadedmechanicalfasteners,whicharedesignedtobeinsertedthroughpreformedholes.


    LockWashersandvibration-resistantwashersaredesignedtopreventathreadedfastenerfromloosening.Thetermsareoftenusedinterchangeably.However,thereisadifference.


    Lockwashersresisttorqueorlooseningforagivenpreload,andvibration-resistantwashersmaintainamoreconstantpreloadwhenthere’smovementinajoint.Alockwashermayincludesometeethtoincreasefrictionortabstoprovidepositivelocking.Avibration-resistantwasher,ontheotherhand,willbesprungsothatasthejointmoves,arelativelyconsistentpreloadismaintainedonthefastener.


    Rivetsaremechanicalfastenerswithaplainunthreadedshaftthatareinsertedthroughholestojointwoormorepartstogether.Apermanentlyformedheadateachendpreventstherivetfromremovalfromthehole.Theshaftpreventsanyradialmovementsofthecomponents.Dependingonthetypeofrivet,anditsabilitytosupportshearload,itcanresistconsiderableforces.Theheadspreventaxialmovementsoftheparts,althoughlessforceissupportedinthisway.

    GreensPowder:ArethereHealthBenefits?

    HealthCareMaterialisadietarysupplementthathasbecomeapopularwaytohelppeoplereachtheirdailyrecommendedintakeofvitaminsandminerals.Thenutrientcombinationingreenspowderisformulatedtosupportyourbody’simmunesystemandenergylevelswhilemeetingthenutritionrequirementsforahealthydiet.


    Ingredientsingreenspowdersvarybybrand,butcommonlyincludenutritionfrom:


    Leafygreensandseaweed


    Grassesandothervegetables


    Antioxidant-richfruits



    Probiotics


    Nutritionalextractsandherbs


    CosmeticsMaterialismostoftenmixedintowater,smoothies,orjuices.Whilethesepowdersoftencomewithagrassytaste,naturalsugarsubstituteslikesteviaextractareaddedtoimprovetheflavor.Thesedietarypowdersarealsousuallyveganandmadefromnon-genetically-modifiedandorganicproducts.



    NutritionInformation


    Nutritioncontentinnaturalpowderswillvarybybrand.Onaverage,aone-tablespoonservingcontains:


    Calories:45


    Protein:3grams

    Carbohydrates:6grams


    Iron:18%ofyourdailyvalue


    VitaminA:60%ofyourdailyvalue


    GreenspowdersoftenincludehighlevelsofvitaminC,whichhasbeenlinkedtohealthyimmunesystemfunction,protectionagainstheartdisease,andgoodskinhealth.


    PotentialHealthBenefits


    Becausegreenspowdersaremadefromdriedfruitsandvegetables,someimportantnutritionalcontentlikefiberislostintheprocess.Greenspowdersarenotasubstituteforawell-balanceddietandcannotreplacethenutritionalbenefitsyougetfromconsumingwholefoods.


    However,doctorssaythatgreenspowdercanbeagreatwaytosupplementahealthydietwithaboostofextravitaminsandantioxidants.


    Takingsomevitaminsinexcesscanleadtohealthissuesormayinteractwithcertainmedications.It’simportanttotalktoyourdoctorbeforeaddinganynutritionalsupplementstoyourdietandchooseareputablebrandofgreenspowder.

    Thenutrientsingreenspowderscancontributetopotentialhealthbenefitsincluding:


    HealthyBloodPressure


    MineralsfoundinMedicinalMateriallikecalciumandpotassiumareassociatedwithgoodbloodpressuremanagement.Inoneclinicalstudy,peoplewhotookoneservingdailyofgreenspowderexperiencedadecreaseinboththeirsystolicanddiastolicbloodpressure.


    ImmuneSystemSupport


    Greenspowderscontainhighlevelsofvitaminsandmineralsassociatedwithmaintainingahealthyimmunesystem.VitaminAhasanti-inflammatorypropertiesthatenhanceimmunity.Forexample,Seleniumisfoundinmostgreenspowders,andisproventohelptheimmunesystemfightinfection.


    ChronicDiseasePrevention


    ThevitaminsfoundinFeedAdditivescanreduceyourriskofchronicdiseasesinthelongterm.VitaminslikeCandKarepotentantioxidantsthatfightcell-damagingfreeradicals.


    Thiscelldamageisknownasoxidationandislinkedtothedevelopmentofchronicdiseaseslikediabetesandheartdisease.Onestudyfoundthataservingofgreenspowdertakendailyreducedcelloxidationinparticipantsby30%.


    EyeandCognitiveHealth


    VitaminKfoundinleafygreensisassociatedwithnumeroushealthbenefitsincludingmaintaininghealthybloodvessels,lesseningtheriskofheartproblems,andpreventingbonelosswithaging.RecentstudieshavealsofoundvitaminKmaypromoteeyehealthandreduceincidenceofage-relateddementia.








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