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Specification : ASTM A231, A249, A269, A270, A312, A358. Dimension : ANSI B 36.10 Grade : TP 304, 304L, 304H, 316, 316L, 316H, 317, 317L, 321, 347. Type : Seamless, ERW, EFW. Size : ΒΌ" to 36"