Suuqa dhuumaha birta ee hadda jira, baahida macaamiisha ayaa noqonaysa mid degdeg ah, gaar ahaan dalabaadka leh tirada ugu yar ee dalabka. Sida loo daboolo baahiyaha macaamiisha ayaa noqotay mudnaantayada koowaad. Xaaladdan oo kale, waxaan si firfircoon ula xiriirnaa warshadaha waaweyn waxaanan ku dadaaleynaa in aan isku xirno ilaha booska ee agabyada kala duwan iyo qeexitaannada si loo hubiyo in macaamiishu ay heli karaan alaabta loo baahan yahay waqtiga ugu gaaban.

Marka hore, waxaan si faahfaahsan u fahmi doonaa baahiyaha gaarka ah ee macaamiisha, oo ay ku jiraan macluumaadka sida walxaha, qeexida, iyo tirada tuubada birta ee loo baahan yahay. Ka dib markaan ogaano macluumaadkan, waxaan si dhakhso ah ula xiriiri doonaa la-hawlgalayaashayada silsiladda sahayda si aan u raadsano agabka boosaska si aan u hubinno inaan bixin karno badeecooyin buuxiya shuruudaha macaamiisha. Isla mar ahaantaana, waxaanu sidoo kale si dabacsanaan ah u hagaajin doonaa istiraatijiyadayada wax iibsiga si aan u daboolno baahiyaha kala duwan ee macaamiisha, xoojinta amarrada dufcadaha yaryar, oo aan u daboolno baahiyaha wax soo iibsiga macaamiisha.

Intaa waxaa dheer, si loo hagaajiyo wax ku oolnimada gaarsiinta, waxaan sidoo kale xoojin doonaa isuduwidda gudaha si loo hubiyo in si hufan loogu shaqeeyo wax soo saarka iyo saadka. Waxaan si fiican ula soconaa in gaarsiinta waqtiga aysan ahayn kaliya ballanqaad kalsoonida macaamiisha, laakiin sidoo kale waxay aasaas muhiim ah u tahay ilaalinta xiriirka ganacsi ee wanaagsan. Sidaa darteed, waxaan sii wadi doonaa inaan ilaalino dabacsanaanta iyo firfircoonaanta, waxaana ku dadaali doonnaa inaan siino macaamiisha xalalka ugu fiican si ay u helaan taageero iyo adeegyo waqti ku habboon baahiyaha degdegga ah. Dadaalkan oo kale, waxaan aaminsanahay inaan ka dhex muuqan karno tartanka adag ee suuqa oo aan ku guuleysan karno kalsoonida macaamiisha iyo iskaashiga.

Sanonpipe tuubooyinka birta ee ugu muhiimsan waxaa ka mid ah tuubooyinka kululeeyaha, tuubooyinka bacriminta, tuubooyinka saliidda, iyo tuubooyinka qaab dhismeedka.

1.Tubooyinka kululeeyaha40%
ASTM A335/A335M-2018: P5, P9, P11, P12, P22, P91, P92;GB/T5310-2017: 20g, 20mng, 25mng, 15mog, 20mog, 12crmog, 15crmog, 12cr2mog, 12crmovg;ASME SA-106/ SA-106M-2015: GR.B, CR.C; ASTMA210(A210M)-2012: SA210GrA1, SA210 GrC; ASME SA-213/SA-213M: T11, T12, T22, T23, T91, P92, T5, T9, T21; GB/T 3087-2008: 10#, 20#;
2.Dhuumaha khadka30%
API 5L: PSL 1, PSL 2;
3.Dhuumaha batroolka10%
GB9948-2006: 15MoG, 20MoG, 12CrMoG, 15CrMoG, 12Cr2MoG, 12CrMoVG, 20G, 20MnG, 25MnG; GB6479-2013: 10, 20, 12CrMo, 15CrMo, 12Cr1MoV, 12Cr2Mo, 12Cr5Mo, 10MoWVNb, 12SiMoVN b;GB17396-2009:20, 45, 45Mn
4.tuubada kulaylka10%
ASME SA179/192/210/213 : SA179/SA192/SA210A1.
SA210C/T11 T12, T22.T23, T91. T92
5.Dhuumaha makaanikada10%
GB/T8162: 10, 20, 35, 45, Q345, 42CrMo; ASTM-A519: 1018, 1026, 8620, 4130, 4140; EN10210: S235GRHS275JOHS275J2H; ASTM-A53: GR.A GR.B