I-ASTM ikhuphe umgangatho omtsha kwi-2015 (emva kokukhululwa kwe-ASTM ye-2015 Volume 01.08) edibanisa imigangatho emithandathu ye-bolting yesakhiwo phantsi kwenkcazo ye-ambulera enye. Umgangatho omtsha, i-ASTM F3125, inesihloko esithi "Ukucaciswa kweeBolts zoLwakhiwo oluPhezulu, iNsimbi kunye ne-Alloy Steel, i-Heat Treated, i-120 ksi (830 MPa) kunye ne-150 ksi (1040 MPa) Ubuncinci bobuNcinci bokuqina, i-Inch kunye ne-Metric Dimensions" kwaye ibandakanya ilandelayo imigangatho ekhoyo:
• I-ASTM A325 kunye ne-ASTM A325M, iinkcukacha zeebholiti zesakhiwo ezifakwe kwintsimbi;
• I-ASTM A490 kunye ne-ASTM A490M, iinkcukacha zeebholiti zesakhiwo ezifakwe kwi-alloy yensimbi; kwaye
• I-ASTM F1852 kunye ne-ASTM F2280, iinkcukacha ze-“twist off” uhlobo lwebholiti/intongomane/iwasha iindibano (iinkcazelo zethu zibhekisa kwezi “njenge-A325 Tru Tension” kunye ne-“A490 Tru Tension”, ngokulandelelanayo)
Oku kudityaniswa kwalungisa ezininzi iiyantlukwano ezincinci phakathi kwemigangatho emithandathu kwaye kwavumela ulungelelwaniso olupheleleyo. Oku kuya kuvumela ukuba uhlengahlengiso lwexesha elizayo lwenziwe kuwo onke amabakala okwakhiwa kweebholithi kwaye kuya kubonelela ngenqaku elinye lereferensi yokubolekwa kwesakhiwo.
Kukho iinguqu ezimbalwa zokwenyani kwiibholithi ezenziweyo nokuba kumgangatho ngamnye okanye amabakala kwi-ASTM F3125 entsha; kodwa ezi zizinto ezinokuba nomdla kakhulu:
• Iibholiti ze-A325 ezinkulu kuno-1” ubukhulu azisayi kuba ne-tensile esezantsi kunye namandla okuqina (zonke iibholiti ze-A325 ziya kuba yi-120 KSI ubuncinane bomgangatho wamandla xa kuthelekiswa ne-105 KSI ubuncinane > 1" ububanzi).
• Akukho mfuneko yovavanyo olujikelezayo kwiibholithi ze-A325 ezifakwe kwi-galvanized kumzimba womgangatho (kukho iSihlomelo ku-F3125 sovavanyo lwesakhono sokujikeleza se-FHWA).
• Isibonelelo sokugqithisa songezwa kwiintongomane ezisetyenziswe ngeebholiti ezigqunywe kwiinkqubo zepeyinti zeF1136/F1136M okanye F2833 (Zinc/Aluminiyam).
Kongezwe ithuba lokusebenzisa amabanga anemilinganiselo eyahlukeneyo (efana neejometri zentloko ezilungisiweyo okanye ubude obukhethekileyo bemisonto) ngokufaka i-Supplemental Requirement S2 kunye nokongeza u-“S” ukuya ekupheleni kwebakala (elifana ne-“A325S” okanye “A490S”).
Siza kuguqula iinkcazo zethu ukuba zibandakanye ireferensi kwi-ASTM F3125 kwimveliso entsha. Nceda uzive ukhululekile ukuqhagamshelana nathi ukuba unayo nayiphi na imibuzo okanye ukuba ungathanda naluphi na ulwazi oluthe vetshe. Enkosi
Ixesha lokuposa: May-23-2017