We, Commerciale Tubi Acciaio S.p.A., Mother Company of the CTA Group, official Tenaris Dalmine
Distributor for Italy, hereby declare that all indication s found by the customer on pipes covered by
above mentioned OSI&D are usual indication present on material carbon steel.
Please note that material has been provided with external dry mill warnish and internal oxidation is
caused by uncoated internal surface as common provided for pipes.
Oxidation occur typical on carbon steel, through long distance transportation and open-yard
storage (considering Thailand is a high humility country), it is quote common for the surface
condition mentioned in the photos and it will not impact the quality of the pipes.
The pipes conformity to the manufacturing standard is guaranteed by the relevant Tenaris Dalmine
mill test certificates, and the mill confirms the responsibility of the supplied products.
Thanks and best regards,
Carletto De