ʻO ke kūʻai pololei ʻana o ka hale hana i nā paipu kūhā like
He inoa no na paipu huinahalike a me na paipu huinahalike, oia hoi na paipu kila me ka like a like ole ka loa o ka aoao. Hana ʻia lākou e ka ʻōwili kila ma hope o ka hana ʻana. ʻO ka mea maʻamau, wehe ʻia ke kila kaulahao, pālahalaha ʻia, ʻōwili ʻia, a hoʻopaʻa ʻia e hana i kahi paipu poepoe, a laila ʻōwili ʻia i loko o kahi paipu huinahā a ʻoki ʻia i ka lōʻihi i makemake ʻia.

Hoʻolauna Huahana
ʻIke ʻia hoʻi ʻo ia he kila hāhā a me ka ʻāpana ʻāpana anuanu-piʻo ʻia, i kapa ʻia ʻo nā paipu huinahā a me nā paipu ʻāpana ʻāpana, me nā code F a me J.
1. ʻAʻole e ʻoi aku ka ʻae ʻia ʻana o ka mānoanoa o ka pā o ka paipu huinahalike ma mua o 10% o ka mānoanoa o ka paia nominal inā ʻaʻole i ʻoi aku ka mānoanoa o ka pā ma mua o 10mm, a hoʻohui a hōʻemi paha i ka 8% o ka mānoanoa o ka pā i ka wā o ka mānoanoa o ka pā. ʻoi aku ka nui ma mua o 10mm, me ka ʻole o ka mānoanoa pā o nā kihi a me nā wahi weld.
2. ʻO 4000mm-12000mm ka lōʻihi hāʻawi maʻamau o ka pahu square, me 6000mm a me 12000mm ka mea maʻamau. Ua ʻae ʻia nā paipu square e hāʻawi ʻia i nā lōʻihi pōkole a me nā lōʻihi paʻa ʻole o lalo o 2000mm. Hiki iā lākou ke hāʻawi ʻia ma ke ʻano o nā paipu interface, akā pono e ʻoki ʻia nā paipu interface ke hoʻohana ʻia e ka mea kūʻai. ʻAʻole ʻoi aku ke kaumaha o ka lōʻihi pōkole a me nā huahana lōʻihi ʻole ma mua o 5% o ka nui o ka lawe ʻana. No na paipu huinahalike me ka nui o ke kaumaha ma mua o 20kg/m, aole ia e oi aku i ka 10% o ka nui o ka haawi ana.
3. 'A'ole e oi aku ka curvature o ka paipu huinahalike i ka 2mm no ka mika, a aole e oi aku ka huina o ka curvature ma mua o 0.2% o ka huina o ka loa.