ʻO ka paipu ERW a me ka paipu LSAW he mau paipu wili pololei, kahi i hoʻohana nui ʻia no ka lawe ʻana i ke wai, ʻoiai nā paipu mamao loa no ka ʻaila a me ke kinoea. ʻO ka ʻokoʻa nui ma waena o nā mea ʻelua ke kaʻina hana wili. ʻO nā kaʻina hana like ʻole e loaʻa ai i ka paipu nā ʻano like ʻole a kūpono no nā hiʻohiʻona noi like ʻole.

Hoʻohana ka paipu ERW i ka hoʻoheheʻe kū'ē alapine kiʻekiʻe a hoʻohana i nā wili kila broadband i ʻōwili wela ʻia ma ke ʻano he mea maka. Ma ke ʻano he hoʻokahi o nā paipu i hoʻohana nui ʻia i kēia lā, ma muli o ka hoʻohana ʻana i nā ʻāpana kila/coils i ʻōwili ʻia me nā ana like a pololei a me nā ana holoʻokoʻa e like me nā mea maka, loaʻa iā ia nā pono o ka pololei kiʻekiʻe o ka dimensional, ka mānoanoa like o ka paia, a me ka maikaʻi o ka ʻili. Loaʻa i ka paipu nā pono o ka humuhumu weld pōkole a me ke kaomi kiʻekiʻe, akā hiki i kēia kaʻina hana ke hana i nā paipu liʻiliʻi a me ka waena-diameter lahilahi (e pili ana i ka nui o ke kaha kila a i ʻole ka papa kila i hoʻohana ʻia ma ke ʻano he mea maka). He maʻalahi ka humuhumu weld i nā kiko hina, nā unfused, nā grooves Corrosion defects. ʻO nā wahi i hoʻohana nui ʻia i kēia manawa ʻo ia ka halihali huahana kinoea kūlanakauhale a me ka ʻaila maka.

Hoʻohana ka paipu LSAW i ke kaʻina hana kuʻi ʻāʻī i lalo o ka wai, kahi e hoʻohana ai i hoʻokahi pā mānoanoa waena ma ke ʻano he mea maka, a hana i ka kuʻi kūloko a me waho ma kahi kuʻi a hoʻonui i ke anawaena. Ma muli o ka laulā o nā huahana i hoʻopau ʻia e hoʻohana ana i nā papa kila ma ke ʻano he mea maka, he paʻakikī maikaʻi nā kuʻi, plasticity, uniformity a me compactness, a he mau pono o ke anawaena paipu nui, ka mānoanoa o ka paia paipu, ke kū'ē ʻana i ke kaomi kiʻekiʻe, ke kū'ē ʻana i ka mahana haʻahaʻa a me ke kū'ē ʻana i ka pala. I ke kūkulu ʻana i nā paipu aila a me ke kinoea mamao loa ikaika kiʻekiʻe, paʻakikī kiʻekiʻe, kiʻekiʻe, ʻo ka hapa nui o nā paipu kila e pono ai he mau paipu kuʻi ʻāʻī i lalo o ka wai me ka paia mānoanoa nui. Wahi a ke kūlana API, ma nā paipu aila a me ke kinoea nui, i ka wā e hele ana ma nā wahi Papa 1 a me Papa 2 e like me nā wahi alpine, nā moena kai, a me nā wahi kūlanakauhale i noho nui ʻia, ʻo nā paipu kuʻi ʻāʻī i lalo o ka wai me ka laina pololei wale nō ke ʻano paipu i koho ʻia.