Dhuumaha birta alxanka leh, oo sidoo kale loo yaqaano tuubada alxanka, tuubada birta alxanka leh waa tuubbo bir ah oo tolmo leh oo laalaabsan oo qaabaysan qaab wareegsan, labajibbaaran iyo qaabab kale iyada oo loo marayo fiilada birta ama saxan bir ah ka dibna qaabaysan. Cabirka guud ee go'an waa 6 mitir.
ERW WELDED PIPE grade: Q235A, Q235C, Q235B, 16Mn, 20#, Q345.
Qalabka caadiga ah: Q195-215; Q215-235
Heerarka fulinta: GB/T3091-2015,GB/T14291-2016 ,GB/T12770-2012 ,GB/T12771-2019 , GB-T21835-2008
Baaxadda codsiga: Biyaha, warshadaha batroolka, warshadaha kiimikada, warshadaha tamarta korontada, waraabka beeraha, dhismaha magaalooyinka. Waxaa loo qaybiyaa shaqada: gaadiidka dareeraha ah (biyaha, dheecaanka), gaadiidka gaaska (gaaska, uumiga, gaaska dareeraha ah), isticmaalka qaab dhismeedka (tuubabka tuulan, buundooyinka; qulqulka, wadada, tuubada qaab dhismeedka).
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