From 1994 until now, TPCO has been granted a number of acceptance certificates by several international and domestic institutions, such as Certificate of Authority to use the Official API Monogram; Quality Management System Certificate for ISO 9001 by SGS United Kingdom Ltd; Yarsley International Certification Services; Det Norske Veritas (DNV); Lloyd’s Register of shipbuilding; ABS Certificate of Design and manufacturing Assessment; Product attestations by European Directive PED 97/23/EC and German Regulation(AD-W0/TRD100), and others. TPCO’s products are also well accepted by major international oil companies such as Shell, Chevron, Saudi ARAMCO, Total,Exxon Mobil, Conoco-Philips, Apache, etc.