I kēia manawa China ka nui anawaena seamless kila paipu, ka hana nui kaʻina hana ua wela-owili a me ka wela hoʻonui o ka nui-anawaena seamless kila paipu, wela hoʻonui seamless kila paipu kiko'ī no 325mm-1220mm loa mānoanoa o 120mm, hiki ke hana seamless kila paipu thermal hoʻonui. ʻO nā ana maʻamau ʻole o ka ʻāina, ʻo ka hoʻonui ʻana i ka wela ka mea a mākou e ʻōlelo pinepine ai ʻo ka hoʻonui ʻana i ka wela, ʻoi aku ka haʻahaʻa akā ʻoi aku ka ikaika contraction i ʻōwili ʻia ke kila me ke ʻano oblique a i ʻole ke kiʻi kiʻi e hoʻonui i ka hemahema o nā kaʻina hana hoʻopau.I loko o kahi manawa pōkole no ka mānoanoa kila e hana i nā ʻano maʻamau a me nā ʻano kūikawā o ka paipu liʻiliʻi, a me ke kumu kūʻai haʻahaʻa, kiʻekiʻe o ka hana ʻana, ke ʻano hoʻomohala o nā kahua ʻōwili honua i kēia lā.
ʻO ke anawaena nui o ka paipu kila maʻemaʻe ʻole ma ke kaha kiʻi anu, nā huahana kila i ʻōwili ʻia, e like me ka hoʻokumu ʻana i ke anu, ka mālama ʻana i ka wela a me ka hāʻawi ʻole ʻia o ka mokuʻāina i kapa ʻia ke kūlana anu a i ʻole ka ʻōwili anu.Ke hoʻohālikelike ʻia me ka mokuʻāina wela (forging), kiʻekiʻe ka kikoʻī kikoʻī kiʻekiʻe o ke kila huki anuanu (rolled) mokuʻāina, maikaʻi ʻili maikaʻi, haʻahaʻa roughness ili, a me kahi kiʻekiʻe mechanical waiwai, ma muli o ke anu (rolled) kila hāʻawi kūlana oxide ili. ʻaʻole i uhi ʻia, a he nui ke koʻikoʻi, palupalu i ka corrosion a i ʻole ka ʻōpala, a no laila ke kila anu i huki ʻia (rolled) mokuʻāina, ʻoi aku ka paʻakikī o kāna ʻeke, ʻoi aku ka ikaika o ka mālama ʻana, pono e mālama ʻia i loko o ka hale kūʻai, a pono e hoʻolohe. ka pahu hoʻomalu mahana a me ka haʻahaʻa.