Ọkụ mba ụwaflangeọkọlọtọ tumadi nwere abụọ usoro, ya bụ European ọkpọkọusoro flangeGerman DIN (gụnyere ndị bụbu Soviet Union) na ọkpọkọ America nọchiri anya yausoro flangenke American ANSI pipe nọchitere anya yaflange. Na mgbakwunye, enwere ọkpọkọ JIS Japaneseflanges, mana na nrụnye petrochemical na-ejikarị naanị maka ọrụ ọha, na mmetụta mba ụwa dị ntakịrị. A na-ewebata flanges ọkpọkọ nke mba dị iche iche n'okpuru:

1, na Germany na Soviet Union mbụ dị ka onye nnọchiteanya nke ọkpọkọ usoro Europeflange
2. American system pipe flange ọkọlọtọ, nke ANSIB16.5 na ANSIB16.47 nọchiri anya ya.
3, British na French pipe flange ọkọlọtọ, mba abụọ nke ọ bụla nwere abụọ ọkọlọtọ flange ọkọlọtọ.
N'ịchịkọta, a pụrụ ichikota ụkpụrụ mba ofesi pipe flanges dị ka abụọ dị iche iche na-adịghị agbanwe agbanwe pipe flange usoro: a European pipe flange usoro nke Germany nọchitere anya ya; Ọzọ bụ usoro flange ọkpọkọ America nke United States nọchiri anya ya.
Ios7005-1 bụ ọkọlọtọ kpọsara site na International Organisation for Standardization na 1992, ọkọlọtọ bụ n'ezie United States na Germany abụọ usoro flanges ọkpọkọ merged n'ime ọkpọkọ flange ọkọlọtọ.