SPECIFICATIONS DIAMETER RANGE LENGTH RANGE GRADE ASTM A 193 / A193M 1/2" - 3 - 3/4" 3 - 1/2" - 40" GR. B7, B7M,B16,B8,B8M ASTM A 320 / A320M 1/2" - 3 - 3/4" / M12-M100 3 - 1/2" - 40" GR. L7, L7M,B8,B8M
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