Large Diameter LSAW paipu pā mānoanoa me kona nui, maikaʻi mea, kaʻina paʻa, lilo i ka mua koho no ka nui hale a me ka haole aila a me ke kinoea papahana. I ka nui-pololei seam submerged arc welded paipu welded ami, weld a me ka wela i hoʻopili 'ia wahi mea loa e hana i ka likeʻole o ka imperfections ka welded undercut, porosity, slag, nele o ka fusion, nele o ke komo, weld, kuni welding māwae ka mea. ʻO ke ʻano nui o nā hemahema wili, a ʻo ia ke kumu o nā pōʻino maikaʻi o ka maikaʻi.
ʻO nā ana mana maikaʻi: 1, ma mua o ka hoʻopaʻa ʻana i ka mana maikaʻi 1) ʻO ka mua, e hana i kahi maikaʻi maikaʻi o nā mea maka, ma hope o ka hele ʻana i ka nānā ʻana ma mua o ke komo ʻana i ke kahua kūkulu, a hoʻopau i ka hoʻohana ʻana i ke kila substandard 2) ukali ʻia e ka. ka hooponopono ana i na mea wiliwili. E nānā inā e hoʻokō ʻia nā mea hoʻoheheʻe no nā huahana kūpono, mālama ʻia a me ka ʻōnaehana baking, inā e hoʻopuka ʻia kahi ʻili weld maʻemaʻe a ʻaʻohe ʻōpala, paʻa ka uhi electrode, me ka ʻole a i ʻole ka pulu. 3) Eia hou, hoʻomaʻemaʻe weld zone hoʻokele. ʻO ka hoʻomaʻemaʻe ʻana i ka QA weld zone, me ka ʻole o ka wai, ka aila, ka ʻōpala a me ka lepo lepo kiʻiʻoniʻoni, ʻo ia ka mea e pale ai i nā hemahema weld waho i hana nui. 4) E koho i ke ʻano kuʻihao kūpono e hoʻokō mua ʻia ka hoʻāʻo ʻana i ka wiliwili, ma hope o nā loina kuʻi. 2, hoʻomalu maikaʻi kuʻihao 1) e like me ke kaʻina hana kuʻi ʻana i nā kikoʻī uea a me ka loiloi flux ua pololei, e pale aku i ka hoʻohana hewa ʻana i ka uea kuʻi a me ka flux i hoʻokumu ʻia e ka maikaʻi o ka ulia. 2) e nānā i ke kaiapuni welding, e hana i nā hana kūpono ma hope o ka wili ʻana inā ʻaʻole maikaʻi ke kaiapuni welding (ka mahana ma lalo o 0 ℃, ʻoi aku ka nui o ka haʻahaʻa ma mua o 90%). 3) ma mua o ka ho'āʻo mua ʻana i nā ana o ka welding groove, me ka lewa, ka ʻaoʻao blunt, a inā paha e hoʻokō ka kihi a me ke awa hewa i nā koi ʻenehana. 4) i ke kaʻina hoʻoheheʻe arc i loko a ma waho o ka manawa wili i koho ʻia, pololei ka uila uila, ka wikiwiki wili a me nā ʻāpana ʻē aʻe. 5) ka nānā 'ana o nā limahana i loko o ka submerged arc kuʻihao i loko a me waho welded kila paipu piha pono o ka pau ana papa arc lōʻihi , hooikaika i ka pono o ka welding arc i ka wa o loko a me waho papa, e kokua i ka hoʻomaikaʻi i ka maikaʻi o ka welding ka paipu pau. . 6) ka nānā 'ana i nā limahana i ka welding slag welding ina paha ua hoʻomaʻemaʻe muaʻia lākou, inā paha ua hoʻomaʻemaʻe loaʻoe i ka awāwa hui inā he aila, ka'ōpala, ka'ōpala, ka wai, ka pena a me nā mea haumia'ē aʻe.