ʻO ka paipu kila welo e pili ana i kahi paipu kila me nā humuhumu ma luna o ka ʻili i hana ʻia ma ke kuʻo ʻana i nā ʻāpana kila a i ʻole nā ​​papa kila i loko o nā ʻano poepoe, huinaha, a me nā ʻano ʻē aʻe a laila wili iā lākou. ʻO ka billet i hoʻohana ʻia no nā paipu kila welded ʻo ia ka pā kila a i ʻole ke kila kila. Mai ka makahiki 1930, me ka hoʻomohala wikiwiki ʻana o ke kila kiʻekiʻe kiʻekiʻe e hoʻomau mau ana i ka hana ʻana a me ka holomua o ka welding a me ka ʻenehana nānā ʻana, ua hoʻomaikaʻi mau ʻia ka maikaʻi o nā welds, ua hoʻonui ʻia nā ʻano a me nā kikoʻī o nā paipu kila welded, a ua pani lākou. nā paipu kila maʻemaʻe ma nā kula nui aʻe. ʻO nā paipu kila welded he haʻahaʻa koina a ʻoi aku ka maikaʻi o ka hana ʻana ma mua o nā paipu kila ʻole.

Hoʻokaʻawale ʻia nā paipu kila i nā paipu seamless a welded. Hoʻokaʻawale ʻia nā paipu welded i nā paipu kila humuhumu pololei a me nā paipu kila spiral. Hoʻokaʻawale ʻia nā paipu wili wili pololei i ka paipu kila ERW (kiekie-frequency resistance welding) a me LSAW steel pipe (straight seam submerged arc welding). ʻO ke kaʻina hana hoʻoheheʻe o nā paipu spiral ʻo ia hoʻi ka ʻokoʻa ma waena o ka hoʻoheheʻe ʻana i ke arc submerged (SSAW steel pipe no ka pōkole) a me LSAW steel pipe ma ke ʻano o nā welds, a ʻo ka ʻokoʻa me ERW ka ʻokoʻa i ke kaʻina hana kuʻi. ʻO ka hoʻoheheʻe ʻana o ke arc submerged (SAW steel pipe) pono e hoʻohui i ka waena (welding wire, flux), akā ʻaʻole pono ʻo ERW. Hoʻoheheʻe ʻia ʻo ERW e ka hoʻomehana waena-frequency. Hiki ke hoʻokaʻawale ʻia nā paipu kila i ʻelua mau ʻāpana e like me ke ʻano hana: nā paipu kila ʻole a me nā paipu kila welded. Hiki ke hoʻokaʻawale ʻia nā paipu kila maʻemaʻe i loko o nā paipu hoʻoheheʻe wela, nā paipu huki anu, nā paipu kila pololei, nā paipu hoʻonui wela, nā paipu anu, a me nā paipu extruded e like me ke ʻano hana. Hana ʻia nā paipu kila maʻemaʻe me ke kila kalapona kiʻekiʻe a i ʻole ke kila kila a hoʻokaʻawale ʻia i loko o ka ʻōwili wela a me ka ʻōwili anu (huki).

He maʻalahi ke kaʻina hana o nā paipu wili wili pololei, me ka hana kiʻekiʻe o ka hana, haʻahaʻa kumu kūʻai, a me ka hoʻomohala wikiwiki. ʻOi aku ka ʻoi aku o ka ikaika o nā paipu wiliwili spiral ma mua o nā paipu wili wili pololei. Hiki ke hoʻohana ʻia nā billet ʻoi aku ka liʻiliʻi no ka hana ʻana i nā paipu welded me nā anawaena nui aʻe, a hiki ke hoʻohana ʻia nā bila o ka laulā like e hana i nā paipu welded me nā anawaena like ʻole. Eia nō naʻe, ke hoʻohālikelike ʻia me nā paipu seam pololei o ka lōʻihi like, piʻi ka lōʻihi weld e 30 ~ 100%, a ʻoi aku ka wikiwiki o ka hana. No laila, wili pinepine ʻia nā paipu wiliwili liʻiliʻi e ka wili wili pololei, ʻoiai ʻo nā paipu wiliwili anawaena nui e wili pinepine ʻia e ka wiliwili spiral.