Hana ʻo Tianjin Rainbow Steel i ka paipu huinaha he ʻano kila ʻāpana lōʻihi me ka ʻāpana hakahaka a ʻaʻohe humuhumu a puni. Hepaipu huinahāi hana ʻia e ka extrusion o ka paipu humuhumu ma o nā ʻaoʻao ʻehā o ka make. Loaʻa i ka paipu huinaha kahi ʻāpana hakahaka a hoʻohana nui ʻia e like me ka paipu no ka lawe ʻana i ka wai. Hoʻohana nui ʻia ia i ka lawe ʻana i ka wai, ke kākoʻo hydraulic, ka ʻano mechanical, ke kaomi waena a me ka haʻahaʻa, ka paipu paila kiʻekiʻe, ka paipu hoʻololi wela, ke kinoea, ka ʻaila a me nā ʻoihana ʻē aʻe. ʻOi aku ka ikaika ma mua o ka hoʻopili ʻana a ʻaʻole e haki. Hana ʻia nā paipu kila ʻōwili wela ma ka hele ʻana i ka pepa metala ma o nā wili e hoʻokō i nā ana kino kikoʻī. Loaʻa i ka huahana i hoʻopau ʻia kahi ʻili ʻino me nā kihi radius, a me kahi kūkulu welded a i ʻole seamless. ʻO ka hana ʻana i ka paipu kila huinaha i ʻōwili wela ʻia e pili ana i ka ʻōwili ʻana i ke kila ma nā mahana ma mua o 1,000 Degree.