TABAN FOOLAD Co. establishing an overall quality system, controls the whole process, specializes in the design and produce variety kinds of elbow 45 deg., elbow 90 deg. And 180 deg. returns. We produce according International standards such as DIN , ASTM, TS , ISIRI and special order of our customer's and guarantees the end products depending on its well equipped laboratory. Fittings Specification : ASTM – American Society for Testing and Materials. ISIRI – Institute of Standards and Industrial Research of Iran. DIN – Deutsches Institut für Normung. TS – Turkish Standard.