Ua kapa ʻia ʻo flange wiliwili a i ʻole flange wili ʻia. Aia kēia ʻano i kahi wili i loko o ka lua o ka flange i kūpono me ke kaula kāne pili i ka paipu a i ʻole ke kūpono.Hoʻohana ʻia kēia ʻano flange inā ʻaʻole he koho ke kuʻi ʻana.Hoʻohana maʻamau ʻia ka flange wili ma nā noi haʻahaʻa haʻahaʻa a me nā paipu liʻiliʻi (a hiki i ka 4″ nominal).