1. Walda mai laushi:kawai waldi na waje Layer, ba tare da waldi na ciki Layer;Gabaɗaya ana amfani da shi a cikin matsakaita da ƙananan bututun matsa lamba, matsa lamba na bututun bai wuce 0.25mpa ba.Akwai uku irin sealing surface nalebur waldi flange, waxanda suke da santsi, nau'in concave da convex da nau'in tsagi na tenon.Daga cikin su, nau'in santsi shine mafi yawan amfani da shi, kuma farashin yana da araha kuma mai tsada.
2. Waldawar gindi:duka ciki da waje yadudduka naflangeya kamata a welded, gabaɗaya ana amfani da su a matsakaici da matsakaicin bututun mai, kuma matsa lamba na bututun yana tsakanin 0.25 ~ 2.5mpa.The sealing surface nawaldi flangehaɗin haɗin yana daɗaɗɗa da haɗuwa, kuma shigarwa ya fi rikitarwa, don haka farashin aiki, hanyar shigarwa da farashin kayan taimako yana da girma.

3. Socket waldi:gabaɗaya ana amfani da shi don matsa lamba na ƙima bai kai ko daidai da 10.0MPa ba, diamita na ƙima bai kai ko daidai da 40mm a cikin bututun ba.
4. Sako da hannun riga: Kullum ana amfani dashi a cikin bututu tare da ƙananan matsa lamba amma matsakaici mai lalata, don haka irin wannan nau'in flange yana da ƙarfin juriya na lalata, kuma kayan shine yafi bakin karfe.
Irin wannan haɗin yana amfani da shi musamman don haɗa bututun ƙarfe, bushing bushing, bututun ƙarfe mara ƙarfe daflange bawul, da dai sauransu, da kuma haɗin kayan aiki na kayan aiki da flange kuma an haɗa su tare da flange.