ASTM tau tshaj tawm tus qauv tshiab hauv xyoo 2015 (tom qab tso tawm 2015 ASTM Volume 01.08) uas suav nrog rau 6 tus qauv bolting tam sim no nyob rau hauv ib lub kaus specification. Tus qauv tshiab, ASTM F3125, yog hu ua "Specification for High Strength Structural Bolts, Steel thiab Alloy Steel, Thaum tshav kub kub kho, 120 ksi (830 MPa) thiab 150 ksi (1040 MPa) Yam tsawg kawg tensile zog, nti thiab Metric Dimensions" raws li cov qauv uas twb muaj lawm:
• ASTM A325 thiab ASTM A325M, specifications rau steel tshav kub-kho cov qauv bolts;
• ASTM A490 thiab ASTM A490M, specifications rau steel alloy kub-kho tus qauv bolts; thiab
• ASTM F1852 thiab ASTM F2280, specifications rau "twist off" hom bolt / txiv ntseej / ntxhua khaub ncaws (peb cov lus piav qhia txog cov no yog "A325 Tru Tension" thiab "A490 Tru Tension", feem)
Qhov kev sib sau ua ke no tau kho ntau qhov sib txawv me ntsis ntawm rau tus qauv thiab tso cai rau kev ua kom tiav ntau dua. Qhov no yuav tso cai rau kev hloov kho yav tom ntej yuav tsum ua tiav thoob plaws txhua qib kev ua haujlwm bolting thiab yuav muab rau ib qho kev siv rau cov qauv bolting.
Muaj qee qhov kev hloov pauv tiag tiag rau cov bolts ua rau tus kheej tus qauv lossis cov qib hauv ASTM F3125 tshiab; Txawm li cas los xij, cov no yog cov khoom uas yuav nyiam tshaj plaws:
• Lub A325 bolts ntau dua 1 "inch yuav tsis muaj qhov qis dua tensile thiab hardness zog (tag nrho A325 bolts yuav yog 120 KSI yam tsawg kawg nkaus lub zog piv rau 105 KSI yam tsawg kawg nkaus> 1" txoj kab uas hla).
• Tsis muaj qhov yuav tsum tau ua kev ntsuas kev sib hloov rau galvanized A325 bolts nyob rau hauv lub cev ntawm tus qauv (muaj ib qho Annex rau F3125 rau FHWA-style rotational capacity test).
• Overtapping nyiaj tau ntxiv rau cov txiv ntoo siv nrog bolts coated rau F1136 / F1136M lossis F2833 (Zinc / Aluminium) xim tshuab
Ntxiv lub sijhawm los siv cov qhab nia nrog qhov sib txawv (xws li hloov pauv lub taub hau geometries lossis cov xov tshwj xeeb ntev) los ntawm kev hu xov tooj ntxiv S2 thiab ntxiv "S" mus rau qhov kawg ntawm qib (xws li "A325S" lossis "A490S").
Peb yuav hloov kho peb cov lus piav qhia kom suav nrog kev siv rau ASTM F3125 ntawm kev tsim khoom tshiab. Thov koj xav tiv tauj peb yog tias koj muaj lus nug lossis yog tias koj xav tau cov ntaub ntawv ntxiv. Ua tsaug
Post lub sij hawm: May-23-2017