Dangane da mafi ƙarancin yawan amfanin ƙasa, tsarin ƙarfe na tsarin farantin jirgi, wato, tsarin ƙarfe na ƙugiya, an raba shi zuwa nau'ikan ƙarfi kamar haka: ƙarfin tsarin gabaɗaya da ƙarfe mai ƙarfi mai ƙarfi.Farantin jirgin ruwa yana nufin farantin karfe mai zafi da aka samar bisa ga ka'idojin gini na al'umma na rarrabawa don kera kayan aikin jirgin ruwa.Ƙarfin tsarin ƙarfin gaba ɗaya na ma'auni na Societyungiyar Rarraba Sinawa ya kasu kashi huɗu masu inganci: A, B, D, da E (watau CCSA, CCSB, CCSD, CCSE);da high-ƙarfi tsarin karfe na kasar Sin Classification Society misali ne uku Karfi matakan, hudu ingancin matakan.

Na ɗaya: ƙayyadaddun ajin jirgi

Babban ka'idojin rarraba al'umma sune:
China CCS
Amurka ABS
Jamus GL
Faransa BV
Norway DN
Japan NK
UK LR
Koriya ta Kudu KR
Italiyanci RINA

Biyu: Bambance-bambancen Dabaru
Tsarin karfe don ƙwanƙwasa ya kasu zuwa ma'auni mai ƙarfi bisa ga mafi ƙarancin yawan amfanin ƙasa: ƙarfin tsarin gabaɗaya da ƙarfe mai ƙarfi mai ƙarfi.
Ƙarfin tsarin ƙarfi na gaba ɗaya na ma'auni na Societyungiyar Rarraba Sinawa ya kasu kashi huɗu masu inganci: A, B, D, da E;da high-ƙarfi tsarin karfe na kasar Sin Classification Society misali ne uku ƙarfi maki da hudu ingancin maki:

A32 D32 E32 F32 ≤50mm Carbon daidai Ceq,% bai wuce 0.36>50-100 Carbon daidai Ceq ba,% bai wuce 0.4A36 D36 E36 F36 ≤50mm Carbon daidai Ceq,% bai wuce 50-300 daidai ba. ,% bai wuce 0.4A40 D40 E40 F40≤50mm Carbon daidai Ceq,% bai wuce 0.4>50-100 Carbon daidai Ceq ba,% Ƙididdigar ƙididdiga mara-carbon C eq（%）=C+Mn/6 +(Cr) +Mo+V)/ 5 +(Ni+Cu)/15….. Jawabi: Carbon daidai yana nufin canza tasirin abubuwan haɗakarwa daban-daban a cikin ƙarfe akan ainihin abun cikin carbon na eutectic batu zuwa haɓaka ko raguwar carbon.

3. Gabatar da farantin jirgin The general ƙarfi karfe ga hull tsarin ya kasu kashi hudu maki: A, B, D da E. Ƙarfin yawan amfanin ƙasa (ba kasa da 235N / mm ^ 2) da kuma tensile ƙarfi (400～520N/ mm^) 2) iri ɗaya ne, amma tasirin makamashi a yanayin zafi daban-daban ya bambanta;Ƙarfe mai ƙarfi mai ƙarfi ya kasu kashi-kashi zuwa ma'auni mai ƙarfi bisa ga mafi ƙarancin ƙarfin yawan amfanin ƙasa, kuma kowane ƙarfin ƙarfin ya kasu kashi A, D, E gwargwadon ƙarfin tasirin sa.,F4.Ƙarfin da ake samu na A32, D32, E32 da F32 bai wuce 315N/mm^2 ba, kuma ƙarfin ƙarfin ƙarfi shine 440～570N/mm^2.-40 °, -60 ° tasirin tasiri;Ƙarfin yawan amfanin ƙasa na A36, D36, E36, F36 ba kasa da 355N/mm^2 ba, ƙarfin ƙarfi shine 490～620N/mm^2, A, D, E da F suna wakiltar tasirin tasirin da za'a iya samu a 0 °, -20 °, -40 °, da -60 ° bi da bi;Ƙarfin yawan amfanin ƙasa na A40, D40, E40, da F40 bai kasance ƙasa da 390N/mm^ 2. Ƙarfin ƙarfi shine 510～660N/mm^2, da A, D, E, da F suna wakiltar tasirin tasirin da zai iya zama samu a 0°, -20°, -40°, da -60° bi da bi.

Hudu: kayan aikin injiniya