304 Dhuumaha birta ah
201, 202, 209, 301, 304, 304L, 310, 321, 316 316L, 309S, 310S, 904L, 1Cr17, 1Cr13, 2Cr13, 3Cr13.
Alaabooyinku waxay u hoggaansamaan heerka qaranka GB/T14976-2002 (tuubo aan fiicnayn oo bir ah oo loogu talagalay gaadiidka dareeraha ah), GB/T14975-2002 (tuubyada birta aan fiicnayn ee qaab dhismeedka), GB/T13296-91 sarrifka), alaabada dhammaatay Warshada si adag ayaa loo tijaabiyay oo buuxisay shuruudaha tusaha farsamada ee heerka qaranka.Qalabka 321/ 1Cr18Ni9Ti 304/0Cr18Ni9 310S /0Cr25Ni20 316L/00Cr17Ni14Mo2 301 304L
Dhuumaha birta ah ee birta ah: Tuubooyinka birta ah ee kulul iyo qabow-duubka leh ee birta aan fiicnayn ee kala duwan ayaa si weyn loogu isticmaalaa dhuumaha qalabka batroolka iyo kiimikooyinka iyo qaybaha dhismaha ee birta ah ee ujeedooyin kala duwan.Marka lagu daro hubinta isku dhafka kiimikada iyo sifooyinka farsamada, waxaa loo isticmaalaa sida tuubooyinka birta oo u adkeysan kara cadaadiska dareeraha.Si loo hubiyo in tijaabada cadaadiska biyaha uu yahay mid u qalma.Dhammaan noocyada tubooyinka birta ee gaarka ah waa in la dammaanad qaadaa iyadoo la raacayo shuruudaha la cayimay.
Dhuumaha birta welded: sidoo kale loo yaqaan tube welded, waxa ay ka sameysan tahay saxan bir ah ama fiilada birta ka dib marka la foorarsado oo la sameeyo, ka dibna alxanka.Sida ku cad qaabka alxanka, waxa loo qaybiyaa tolmo toosan oo alxan leh iyo tuubo alxan leh.
Sida laga soo xigtay ujeedada, waxa loo qaybiyaa biibiile welded guud, galvanized tube welded, oxygen-afuufi tuubo alxanka, daah silig, biibiile welded metric, tuubada rullaluistemadka, tuubada ceelka qoto dheer, 321 tube bir ahama, tube baabuurta, Transformer tube, korontada tuubo dhuuban oo alxan leh, tuubo qaabaysan oo koronto ah oo alxan leh iyo tuubo alxan leh oo wareeg ah.
