ERW trubkasi texnik talablari Texnik talablar Neft va gazni tashish uchun Past bosimli suyuqlikni tashish uchun Material Gr.b Gr.b Quvur korpusining diametri D<508mm, ±0,75%;D≥508mm, ±0,75% D≤168,3, ±1,0%;168,3<D≤508,±0,75%;Devor qalinligi D<508mm,+15,0%-12,5%;D≥508mm, +17,5%-10% ...
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