O paipa fa'avela maualalo ma feololo e fai mai i ingots po'o pa'u malo e fa'a'a'a'a e fai ai se fa'apa'u, ona ta'avale vevela, ta'ai malulu po'o vili malulu.O paipa u'amea seamless o lo'o i ai se tulaga taua i le pisinisi paipa u'amea a Saina.E tusa ai ma fuainumera le atoatoa, o loʻo i ai nei a Saina seamless paipa gaosiga pisinisi e uiga i 240 sili atu nai lo, seamless iunite paipa uʻamea e uiga i 250 seti, le gafatia gaosiga faaletausaga o le sili atu i le 4.5 miliona tone.Mai le manatu fa'aiva, <φ76, fa'amauina mo le 35%, <φ159-650, fa'amauina mo le 25%.I le tulaga o ituaiga, 1.9 miliona tone o faʻamoemoega lautele, faʻamauina mo le 54%;760,000 tone o paipa suauu, e tusa ma le 5.7%;150,000 tone o pou hydraulic, saʻo paipa, faʻamaumauga mo le 4.3%;paipa u'amea, tu'u fa'amomoli, ta'avale ta'avale e 50,000 tone, fa'amauina mo le 1.4%.
Maualalo ma feololo mamafa faagaau faumea meatotino masini: tensile malosi σb (MPa): ≥ 410 (42) maua malosi σs (MPa): ≥ 245 (25) elongation δ5 (%): ≥ 25 vaega fa'aitiitia ψ (%): ≥ 5 , maaa: e le o le vevela togafitiga, ≤ 156HB, lapo'a fa'ata'ita'iga: lapo'a fa'ata'ita'iga 25mm fa'ama'i fa'amasani ma fa'alapotopotoga metallographic: fa'amatalaga fa'afefete: masani, 910 ℃, Ea malulu.Fa'alapotopotoga metallographic: ferrite + pearlite.
Medium ma maualalo omiga faagaau faagaau tulaga faatinoga: GB3087-1999 seamless paipa uʻamea mo le maualalo ma feololo faumea.
O paipa fa'alava e feololo ma maualalo o fa'aulu vevela ma fa'aa'ai mālūlū (ta'avale) fa'alava e leai ni fa'auiga o le uamea fa'apipi'i sili ona lelei e fa'aaogaina mo le fa'afuina o fa'aau ausa, fa'avai vai ta'avale ma fa'aau asu fa'aaasa tele mo fa'afu locomotive, fa'aasu lapopo'a, fa'aumu asu laiti ma le fao. paipa piliki mo fausaga eseese o pusa faufale maualalo ma feololo.E masani ona faʻaaogaina mo faufale faufale ma pusa ola e felauaiga paipa vai maualalo ma feololo.O mea fa'atusa o le 10 ma le 20 gauge sila.
