Ma ke kahua o ka ʻenehana pipeline, nā flanges, ma ke ʻano he mea nui no ka hoʻopili ʻana i nā pipelines, loaʻa nā ʻano like ʻole a me nā hana. Ma waena o lākou, ua lilo nā flanges welded i nā "huahana hōkū" i nā ʻōnaehana pipeline ʻoihana ma muli o kā lākou hana maikaʻi loa a me nā hiʻohiʻona noi ākea.

He ʻokoʻa ka ʻāʻī welding, ʻike ʻia hoʻi ʻo ka ʻāʻī kiʻekiʻe, no ka mea, ʻo ka ʻāʻī kiʻekiʻe ka lōʻihi a me ke kuʻekuʻe ʻana mai ka lae kuʻi ma waena o ka flange a me ka paipu (e like me ka hōʻike ʻana ma ke kiʻikuhi schematic). ʻO ka hoʻolālā akamai o kēia'ā'ī kiʻekiʻeʻaʻole e hoʻonui wale i ka paʻakikī a me ka ikaika o ka flange, akā e hoʻopau maikaʻi i ka hoʻopauʻana i ke kaumaha, e hōʻoia ana i ka paʻa a me ka silaʻana o ka'ā'ī i nā'ōpuni kiʻekiʻe, kiʻekiʻe-mehana, a me nā haʻahaʻa haʻahaʻa. ʻOi aku ka nui o ka hoʻolālā o loko ma mua o ke anawaena o waho o ka pipeline, e maʻalahi ai ka hoʻopili ʻana i ka butt, ʻoiai ka wili weld circumferential i loko a me waho o ka flange, e hoʻonui hou i ka hana sila.

Ma muli o kēia mau mea hoʻolālā maikaʻi, kūpono loa nā flanges butt welded no nā ʻōnaehana pipeline kiʻekiʻe, kiʻekiʻe-mehana, a i ʻole haʻahaʻa haʻahaʻa i nā ʻoihana ʻoihana e like me ka petroleum, kemika, a me ka hana moku. Hiki iā ia ke pale i nā loli koʻikoʻi i ke kaomi a me ka mahana, e hōʻoia i ka hana paʻa o ka pipeline. I kēia manawa, hoʻohana pinepine ʻia nā flanges welded butt i nā pipeline no ka lawe ʻana i nā mea pahū, pahū, a ʻona paha, a ʻo kā lākou hana hoʻopaʻa hilinaʻi e hāʻawi i nā hōʻoia ikaika no ka halihali palekana o ka media.

I nā ʻōlelo o ka hana ʻana, pono e hoʻokō nā flanges butt welded me nā koi koʻikoʻi e like me JB4726-4728. Wahi a nā ʻano paʻi a me nā mea waiwai, ʻo nā māka forging mai ka Papa I a i ka Papa III e hōʻoia i ka hana o ka flange ma nā wahi hana like ʻole. Eia kekahi, ʻaʻole pono ke kiʻekiʻe o waho o ka ʻāʻī o ka flange welded ma mua o 70 °. Kōkua kēia kikoʻī hoʻolālā i ka hoʻomalu pono ʻana i nā ʻāpana ʻenehana i ka wā o ka hana ʻana a me nā kaʻina hana welding, me ka hoʻohana piha ʻana i ke kuleana a me ka waiwai o ka flange.