ʻOi aku ka nui o ke anawaena o waho o ka paipu seamless wela ma mua o 32mm, a ʻo ka mānoanoa o ka pā he 2.5-200mm. ʻO ke anawaena o waho o ka paipu kila liʻiliʻi i ʻōwili ʻia e hiki ke hiki i 6mm, a hiki i ka mānoanoa o ka paia ke hiki i 0.25mm. Hiki ke hiki i ka 5mm ke anawaena o waho o ka paipu paia lahilahi a emi iho ka manoanoa o ka paia ma mua o 0.25mm.

Hoʻohana ʻia ka paipu kila maʻamau i hana ʻia me 10, 20, 30, 35, 45 a me nā mea kila kiʻekiʻe kiʻekiʻe ʻē aʻe 16Mn, 5MnV a me nā mea hao haʻahaʻa haʻahaʻa haʻahaʻa a i ʻole 40Cr, 30CrMnSi, 45Mn2, 40MnB a me nā kila i hoʻopaʻa ʻia ʻē aʻe. rolled.10, 20 a me kekahi haʻahaʻa kalapona kila manufacturing seamless paipu hoʻohana nui ʻia no ka pipeline wai.45, 40Cr a me nā mea hao kalapona ʻē aʻe i hana ʻia i ka paipu maʻemaʻe e hana i nā ʻāpana mechanical, e like me nā kaʻa, nā tractors stressed parts.The general use of seamless steel pipe to ensure the strength and flattening test.Hot rolled steel pipes Hāʻawi ʻia i loko o ka ʻōwili wela a i ʻole ka wela wela.