1. wiliwili palahalaha:wili wale i ka papa o waho, me ka ʻole o ka wili ʻana i ka papa o loko; Hoʻohana maʻamau i nā pipelines haʻahaʻa a me ka haʻahaʻa, ʻoi aku ka liʻiliʻi o ke kaomi nominal o ka pipeline ma mua o 0.25mpa. He ekolu ano o ka sila ili owiliwili palahalaha, He ʻano laumania, ʻano concave a me convex a me ke ʻano o ka tenon groove. I waena o lākou, ʻo ke ʻano maʻalahi ka mea i hoʻohana nui ʻia, a ʻo ke kumukūʻai ke kumukūʻai a me ke kumu kūʻai.
2. Kuʻi kuʻihao:ʻo nā papa o loko a me waho o kaflangepono e welded, maʻamau hoʻohana ʻia i nā pipelines medium a me ke kiʻekiʻe, a ʻo ke kaomi nominal o ka pipeline ma waena o 0.25 ~ 2.5mpa. Ka ili hoailona o kawelding flangeconcave a convex ka pilina, a ʻoi aku ka paʻakikī o ka hoʻonohonoho ʻana, no laila ke kiʻekiʻe ke kumu kūʻai o ka hana, ke ʻano hoʻonohonoho a me ke kumu kūʻai mea kōkua.

3. Socket welding:hoʻohana maʻamau no ke kaomi nominal ʻoi aku ka liʻiliʻi a i ʻole like me 10.0MPa, ʻoi aku ka liʻiliʻi o ke anawaena nominal ma mua o 40mm i ka pipeline.
4. ʻO ka lima ʻūlū: Hoʻohana maʻamau i loko o ka pipeline me ka haʻahaʻa haʻahaʻa akā corrosive medium, no laila, ʻo kēia ʻano flange he kūpaʻa kūpaʻa ikaika, a ʻo ka mea nui ka mea kila kila.
Hoʻohana nui ʻia kēia ʻano pili no ka hoʻopili ʻana i ka paipu hao hao, hose bushing, paipu metala hao ʻole aflange valve, etc., a me ka pili ana o na lako hana a me ka flange ua pili pu me ka flange.