grade b seamless pipe; shall be in accordance w/standard spec astm A106; schedule 80 seamless; surface treatment black carbon oxide surface treated close
grade b seamless pipe; shall be in accordance w/standard spec astm A106; schedule 80 seamless; surface treatment black carbon oxide surface treated close
grade b seamless pipe; shall be in accordance w/standard spec astm A106; schedule 80 seamless; surface treatment black carbon oxide surface treated close