ASTM yakaburitsa mwero mutsva muna 2015 (mushure mekuburitswa kweiyo 2015 ASTM Vhoriyamu 01.08) iyo inosanganisa matanhatu azvino zvimiro zvemabhaudhi mazinga pasi peimwe amburera yakatarwa. Iyo chiyero chitsva, ASTM F3125, yakanzi "Kutsanangurwa Kwekusimba Kwesimba Mabhaudhi, Simbi uye Alloy Simbi, Heat Yakabatwa, 120 ksi (830 MPa) uye150 ksi (1040 MPa) Minimum Tensile Simba, Inch uye Metric Dimensions" uye inosanganisira iyo tevera zviyero zviripo:
• ASTM A325 uye ASTM A325M, tsanangudzo yesimbi inopisa-yakagadziriswa mabhoti ekugadzirisa;
• ASTM A490 uye ASTM A490M, tsanangudzo yesimbi alloy inopisa-yakagadziriswa mabhoti ekugadzirisa; uye
• ASTM F1852 uye ASTM F2280, zvinotsanangurwa zve“twist off” mhando yebhaudhi/nati/washer magungano (tsananguro dzedu dzinoreva izvi se“A325 Tru Tension” uye “A490 Tru Tension”, zvichiteerana)
Kubatanidzwa uku kwakagadzirisa zvikanganiso zvishoma zvishoma pakati pezviyero zvitanhatu uye zvakabvumira kurongeka kwakazara. Izvi zvinobvumira kuti gadziridzo dzenguva yemberi dziitwe pamativi ese ezvimiro zvemabhaudhi mamakisi uye ichapa imwe chete poindi yereferensi yekuumbwa kwebhaudhi.
Kune mashoma chaiwo shanduko kumabhaudhi akaitwa kune chero mwero mwero kana mamakisi mune itsva ASTM F3125; zvisinei izvi ndizvo zvinhu zvinganyanya kufarirwa:
• Mabhaudhi eA325 makuru kupfuura 1” dhayamita haachazove nekudzika uye kuoma kwesimba (ese maA325 mabhaudhi achange ari 120 KSI mashoma esimba nhanho zvichienzaniswa ne105 KSI mashoma > 1” dhayamita).
• Hapana kutenderera kunodiwa kwekuyedza mabhaudhi eA325 akabatiswa mumuviri wechiyero (pane Annex kuF3125 yeFHWA-maitiro ekutenderera kugona kuyedzwa).
• Mvumo yekupfuura yakawedzerwa panzungu dzinoshandiswa nemabhaudhi akavharidzirwa kuF1136/F1136M kana F2833 (Zinc/Aluminium) pendi masisitimu.
Yakawedzera mukana wekushandisa mamakisi ane mativi akasiyana (akadai seakagadziridzwa musoro geometri kana yakakosha shinda kureba) nekukokera Supplemental Inodiwa S2 nekuwedzera "S" kusvika kumagumo egiredhi (senge "A325S" kana "A490S").
Isu tichagadzirisa tsananguro yedu kuti ibatanidze referensi yeASTM F3125 pane itsva kugadzirwa. Ndapota inzwa wakasununguka kutibata nesu kana uine chero mibvunzo kana kana uchida rumwe ruzivo. Ndatenda
Nguva yekutumira: May-23-2017