ASTM ta fitar da wani sabon ma'auni a cikin 2015 (bayan an fitar da 2015 ASTM Volume 01.08) wanda ke ƙarfafa ka'idojin kulle tsarin yanzu guda shida a ƙarƙashin ƙayyadaddun laima guda ɗaya. Sabuwar ma'auni, ASTM F3125, tana da taken "Bayyana don Ƙarfin Ƙarfafa Tsarin Ƙarfi, Karfe da Alloy Karfe, Heat Jiyya, 120 ksi (830 MPa) da 150 ksi (1040 MPa) Ƙarfin Ƙarfin Ƙarfin Ƙarfi, Inch da Metric Dimensions" kuma ya haɗa da bin ka'idojin da ake da su:
• ASTM A325 da ASTM A325M, ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙirar ƙirar ƙirar ƙarfe na ƙarfe;
• ASTM A490 da ASTM A490M, ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙirar ƙirar ƙarfe na gami da zafin jiki; kuma
ASTM F1852 da ASTM F2280, ƙayyadaddun ƙayyadaddun bayanai don nau'in "karkatar da kashe" nau'in gunki / goro / wanki (bayanin mu yana nufin waɗannan a matsayin "A325 Tru Tension" da "A490 Tru Tension", bi da bi)
Wannan haɓakawa ya gyara ɗimbin bambance-bambance tsakanin ma'auni shida kuma ya ba da izinin ƙarin daidaitawa. Wannan zai ba da damar yin gyare-gyare na gaba a duk matakan bolting na tsarin kuma zai samar da maƙasudi guda ɗaya don kulle tsarin.
Akwai ƴan ƴan canje-canje na gaske ga ƙullun da aka yi zuwa ko dai daidaitattun daidaikun mutane ko maki a cikin sabon ASTM F3125; duk da haka waɗannan su ne abubuwan da ka iya zama mafi ban sha'awa:
• Ƙaƙwalwar A325 mafi girma fiye da 1 "diamita ba za su sake samun ƙananan ƙarfi da ƙarfin ƙarfi ba (duk A325 bolts za su kasance 120 KSI mafi ƙarancin ƙarfin ƙarfin idan aka kwatanta da 105 KSI mafi ƙarancin> 1" diamita).
• Babu buƙatar gwajin jujjuya don bolts A325 na galvanized a cikin jikin ma'auni (akwai Annex zuwa F3125 don gwajin ƙarfin juyi irin salon FHWA).
• An ƙara izinin wuce gona da iri don goro da aka yi amfani da su tare da bolts da aka lulluɓe zuwa tsarin fenti F1136/F1136M ko F2833 (Zinc/Aluminum)
An ƙara damar yin amfani da maki masu girma dabam (kamar gyaggyara geometries na kai ko tsayin zare na musamman) ta hanyar kiran ƙarin Buƙatun S2 da ƙara "S" zuwa ƙarshen sa (kamar "A325S" ko "A490S").
Za mu canza kwatancenmu don haɗawa da batun ASTM F3125 akan sabon samarwa. Da fatan za a ji daɗin tuntuɓar mu idan kuna da wasu tambayoyi ko kuma idan kuna son ƙarin bayani. na gode
Lokacin aikawa: Mayu-23-2017