Bututun duniyaflangemisali yafi yana da tsarin guda biyu, wato bututun Turaitsarin flangeDIN Jamus (ciki har da tsohuwar Tarayyar Soviet) da bututun Amurkatsarin flangebututun ANSI na Amurkaflange. Bugu da ƙari, akwai bututun JIS na Japanflanges, amma a cikin kayan aikin petrochemical gabaɗaya ana amfani da su don ayyukan jama'a ne kawai, kuma tasirin ƙasashen duniya kaɗan ne. An gabatar da flanges na bututu na ƙasashe daban-daban a ƙasa:

1, zuwa Jamus da tsohuwar Tarayyar Soviet a matsayin wakilin tsarin tsarin Turaiflange
2. American tsarin bututu flange misali, wakilta ANSIB16.5 da ANSIB16.47
3, Biritaniya da Faransanci ka'idodin flange, ƙasashe biyu kowanne yana da ka'idodin flange guda biyu.
A taƙaice, ana iya taƙaita ƙa'idodin ƙasashen duniya na flanges na bututun a matsayin nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan bututu guda biyu daban-daban kuma ba masu canzawa ba: tsarin flange na bututun Turai wanda Jamus ke wakilta; Wani kuma shine tsarin flange na bututun Amurka wanda Amurka ke wakilta.
Ios7005-1 misali ne wanda Ƙungiyar Ƙasa ta Duniya don daidaitawa a cikin 1992, ma'auni shine ainihin Amurka da Jamus nau'i biyu na flanges na bututu da suka haɗu a cikin ma'auni na bututu.