ʻO nā paipu HSAW (spiral submerged arc welded pipe), ʻo ia ka mabe o ke kila ʻōwili wela a me ka piko i hana ʻia e like me ka spiral, ka hoʻoheheʻe ʻia ʻana o ke arc submerged i hana ʻia i loko o ke kaʻina a me ka seam o waho welded spiral seam steel pipe (ʻike ʻia ʻo spiral welded pipe. , paipu spiral, paipu kila kila). No nā kumu aʻe, hoʻohana nui ʻia i ka hana ʻana o ka paipu kila nui:
1) hoʻololi i ke ʻano o ke ʻano, hiki iā ʻoe ke hoʻohana i ka hoʻohana ʻana i ka hoʻohua like ʻana i nā ʻano like ʻole o ka paipu kila;
2) no ka mea he kulou mau ia, ʻaʻole palena ka lōʻihi o ka lōʻihi o ka paipu kila;
3) weld hoʻohiwahiwa ʻano like ʻole ka hoʻokaʻawale ʻana ma ke anapuni o ka paipu kila holoʻokoʻa, ka nui o ka paipu kila, ka pololei kiʻekiʻe, ka ikaika kiʻekiʻe;
4) maʻalahi e hoʻololi i ka nui kūpono no nā mea liʻiliʻi o ka hana paipu kila o nā ʻano like ʻole.

ʻO ka lōʻihi o ka weld wili pololei, L ka lōʻihi o ka weld, L / cos (8). No ka manawa lōʻihi e hoʻopaʻapaʻa ana i ka paipu wili a me ka hili pololei, ʻo wai ka mea i ʻoi aku ka maikaʻi ma mua o ka paipu kila UOE. ʻO ka ʻenehana hana ʻenehana a hiki i kēia lā, pono mākou e loiloi a pololei a hoʻohālikelike, ka manaʻo o kahi weld spiral lōʻihi.

ʻO ka mea mua, ma muli o nā hemahema o ka weld parallel, no ka paipu spiral, ʻo nā defects weld he "oblique defects". I ka wā o ka hoʻohana ʻana, ʻo ke kuhikuhi koʻikoʻi nui o ka paipu kila, ʻo ka ʻaoʻao axis paipu o ka lōʻihi like ʻole he like ia ma mua o ka liʻiliʻi o ka paipu seam pololei; ʻO ka lua, ʻoiai ua ʻōwili ʻia ke kila pipeline, ʻoi aku ka ikaika o ka anisotropy nui ma ka ʻaoʻao o ka ʻōwili ʻana i ka waiwai CVN ma mua o ke kū pono ʻana i ke ala ʻōwili o ka waiwai CVN ʻekolu mau manawa kiʻekiʻe. Pololei seam paipu i loaʻa i ke koʻikoʻi nui, ua pololei pololei i ke kuhikuhi o ka haʻahaʻa paipu hopena kū'ē, oiai ka spiral mea e stagger ka haʻahaʻa i loko o ke kuhikuhi o ka paipu hopena kū'ē, no laila, i ka spiral weld disadvantages i ka pomaikai.