ASTM idatulutsa mulingo watsopano mu 2015 (atatulutsidwa kwa 2015 ASTM Volume 01.08) yomwe imaphatikiza miyezo isanu ndi umodzi yaposachedwa yamaboliti pansi pa ambulera imodzi. Muyezo watsopano, ASTM F3125, umatchedwa "Specification for High Strength Structural Bolts, Steel and Alloy Steel, Heat Treated, 120 ksi (830 MPa) and150 ksi (1040 MPa) Minimum Tensile Strength, Inch and Metric Dimensions" ndipo imaphatikizapo kutsatira miyezo yomwe ilipo:
• ASTM A325 ndi ASTM A325M, zofotokozera zazitsulo zopangira kutentha kwazitsulo;
• ASTM A490 ndi ASTM A490M, ndondomeko zazitsulo zazitsulo zopangira kutentha kwazitsulo; ndi
• ASTM F1852 ndi ASTM F2280, tsatanetsatane wa magulu a "twist off" mtundu wa bawuti/nati/wacha (mafotokozedwe athu amatcha "A325 Tru Tension" ndi "A490 Tru Tension", motsatana)
Kuphatikizikaku kunakonza kusiyana pang'ono pang'ono pakati pa miyezo isanu ndi umodzi ndikulola kuwongolera kokwanira. Izi zidzalola kuti zosintha zamtsogolo zichitike pamakalasi onse a ma bolting ndipo zidzapereka mfundo imodzi yowunikira ma bolting.
Pali zosintha zenizeni zochepa pamaboliti opangidwa ku milingo yamunthu payekha kapena magiredi mu ASTM F3125 yatsopano; komabe izi ndi zinthu zomwe zingakhale zokondweretsa kwambiri:
• Maboliti a A325 akulu kuposa 1” m’mimba mwake sadzakhalanso ndi mphamvu yocheperako komanso yolimba (maboliti onse a A325 adzakhala 120 KSI osachepera mphamvu mlingo poyerekeza 105 KSI osachepera > 1” awiri).
• Palibe kuyeserera kozungulira kofunikira kwa mabawuti opaka malata a A325 m'thupi la muyezo (pali Annex ku F3125 yoyesa mphamvu yozungulira yamtundu wa FHWA).
• Malire owonjezera awonjezedwa pa mtedza wogwiritsidwa ntchito ndi mabawuti okutidwa ku makina a penti F1136/F1136M kapena F2833 (Zinc/Aluminium)
Anawonjezera mwayi wogwiritsa ntchito magiredi okhala ndi miyeso yosiyana (monga ma geometri osinthidwa kapena ulusi wapadera wa ulusi) mwa kuyitanitsa Supplemental Requirement S2 ndikuwonjezera “S” kumapeto kwa giredi (monga “A325S” kapena “A490S”).
Tisintha mafotokozedwe athu kuti aphatikizire ku ASTM F3125 pakupanga kwatsopano. Chonde khalani omasuka kutilankhula nafe ngati muli ndi mafunso kapena ngati mukufuna zina zambiri. Zikomo
Nthawi yotumiza: May-23-2017