Certified of system SC ZIMTUB SA Zimnicea has implemented a Quality Management System certified by two bodies: - according to ISO 9001 :2000 certified by TUV Suddeutschland Munchen and API Washington; - according to API Spec. Q1, ed. 7-a 2003, certified by API Washington. Certified of Product As a proof of our permanent concern with improving the quality of the products and services is the large number of quality attestation and certificates issued by prestigious quality certification bodies like TUV, ISCIR, IIW for our products, manufacturing and testing procedures, execution and co-ordination staff. ZIMTUB is API certified for spirally welded pipes according to API specification 5L, 43rd ed./2004, quality level PSL 1, including the right to use API monogram.