ASTM e lokolotse tekanyetso e ncha ka 2015 (kamora ho lokolloa ha 2015 ASTM Volume 01.08) e kopanyang litekanyetso tse tšeletseng tsa hajoale tsa bolting tlasa sekhele se le seng. Tekanyetso e ncha, ASTM F3125, e bitsoa "Specification for High Strength Structural Bolts, Steel le Alloy Steel, Heat Treated, 120 ksi (830 MPa) le 150 ksi (1040 MPa) Minimum Tensile Strength, Inch le Metric Dimensions" 'me e kenyelletsa ho latela maemo a teng:
• ASTM A325 le ASTM A325M, litlhaloso bakeng sa liboutu tsa mohaho tse nang le mocheso oa tšepe;
• ASTM A490 le ASTM A490M, litlhaloso bakeng sa liboutu tsa sebopeho tsa tšepe tse nang le motsoako oa mocheso; le
• ASTM F1852 le ASTM F2280, litlhaloso bakeng sa likopano tsa mofuta oa "twist off" mofuta oa bolt/nut/washer (litlhaloso tsa rona li bua ka tsena e le "A325 Tru Tension" le "A490 Tru Tension", ka ho latellana)
Khokahano ena e ile ea lokisa liphapang tse ngatanyana tse fokolang lipakeng tsa litekanyetso tse tšeletseng 'me ea lumella ho tsamaisana ka botlalo. Sena se tla lumella hore ho etsoe liphetoho nakong e tlang ho pholletsa le limaraka tsohle tsa meralo ea bolting 'me se tla fana ka ntlha e le' ngoe ea litšupiso bakeng sa ho tiisa liboutu.
Ho na le liphetoho tse fokolang tsa 'nete ho liboutu tse entsoeng ho maemo a motho ka mong kapa limaraka ho ASTM F3125 e ncha; empa tsena ke lintho tse ka khahlang haholo:
• Liboutu tsa A325 tse kholo ho feta 1" bophara ha li sa tla hlola li e-ba le matla a tlaase le a thata (liboutu tsohle tsa A325 e tla ba 120 KSI bonyane ba matla a matla ha a bapisoa le 105 KSI bonyane> 1" bophara).
• Ha ho na tlhoko ea tlhahlobo ea potoloho bakeng sa liboutu tsa A325 tse kentsoeng ka masenke 'meleng oa maemo (ho na le Sehlomathiso ho F3125 bakeng sa tlhahlobo ea matla a potoloho ea mofuta oa FHWA).
• Ho kenyellelitsoe tumello ea ho feta bakeng sa linate tse sebelisoang ka liboutu tse tlositsoeng ho sistimi ea pente ea F1136/F1136M kapa F2833 (Zinc/Aluminium)
E kentse monyetla oa ho sebelisa limaraka ka litekanyo tse fapaneng (joalo ka lijeometri tse fetotsoeng tsa hlooho kapa bolelele bo khethehileng ba likhoele) ka ho kopa Supplemental Requirement S2 le ho eketsa “S” qetellong ea kereiti (joalo ka “A325S” kapa “A490S”).
Re tla fetola litlhaloso tsa rona ho kenyelletsa tšupiso ho ASTM F3125 mabapi le tlhahiso e ncha. Ka kopo, ikutloe u lokolohile ho ikopanya le rona haeba u na le lipotso kapa haeba u ka rata tlhahisoleseling efe kapa efe. kea leboha
Nako ea poso: May-23-2017