Hana ʻia nā paipu paila haʻahaʻa haʻahaʻa a me waena o nā ingots a i ʻole nā billet paʻa i hoʻoheheʻe ʻia e hana i ka pahu burr, a laila ʻōwili wela, ʻōwili anu a i ʻole ke kelepona ʻia.He kūlana koʻikoʻi ko ka paipu kila maʻemaʻe ma Kina.E like me ka pau ole 'ikepili helu, China ka mea i loaʻa seamless paipu hana 'oihana e pili ana i 240 oi ma mua o, seamless kila paipu wae e pili ana i 250 sets, ka makahiki hana mana o ma kahi o 4.5 miliona tona.Mai ka manaʻo caliber, <φ76, helu no 35%, <φ159-650, helu no 25%.Ma keʻano o nāʻanoʻano, 1.9 miliona tons o nā paipu maʻamau, helu no 54%;760,000 tona o na paipu aila, he 5.7%;150,000 tons o nā pou hydraulic, nā paipu pololei, helu no 4.3%;nā paipu kuhiliʻole, nā paipu halihali, nā paipu automotive he 50,000 tons, helu no 1.4%.
ʻO ka haʻahaʻa haʻahaʻa haʻahaʻa haʻahaʻa haʻahaʻa haʻahaʻa haʻahaʻa haʻahaʻa haʻahaʻa haʻahaʻa haʻahaʻa o ka pahu pahu pahu me nā waiwai mechanical: tensile ikaika σb (MPa): ≥ 410 (42) hua ikaika σs (MPa): ≥ 245 (25) elongation δ5 (%): ≥ 25 pauku shrinkage ψ (%): ≥ 5 , paʻakikī: ʻaʻole mālama wela, ≤ 156HB, ka nui o ka laʻana: ka nui o ka laʻana 25mm nā kikoʻī lapaʻau wela a me ka hui metallographic: nā kikoʻī lapaʻau wela: maʻamau, 910 ℃, Hoʻoluʻu ea.ʻO ka hui metallographic: ferrite + pearlite.
Medium a me ka haʻahaʻa puʻe pahu pahu hoʻokō maʻamau: GB3087-1999 seamless paipu kila no ka haʻahaʻa a me ka haʻahaʻa puʻe paila.
ʻO nā paipu paila haʻahaʻa haʻahaʻa a ʻōwili wela a huki ʻia i ke anu (rolled) ʻo nā paipu maʻemaʻe ʻole o ke kila kalapona kiʻekiʻe i hoʻohana ʻia no ka hana ʻana i nā paipu mahu superheated, nā paipu wai i ʻōwili ʻia a me nā paipu mahu wela loa no nā paila locomotive, nā paipu uahi nui, nā paipu uwahi liʻiliʻi a me ka pio. nā paipu pōhaku lepo no nā ʻano hana like ʻole o nā paila haʻahaʻa a me waena.Hoʻohana nui ʻia no nā boilers ʻoihana a me nā boilers ola e lawe i nā paipu wai wai haʻahaʻa a me waena.ʻO ka mea hōʻike he 10 a me 20 gauge kila.
