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| International Certification | |
| 1991 | Passing the UL united states safety foundation laboratory certification. |
| 1997 | Passing the ISO 9002¡G1994 quality managing system DNV certification. |
| 1999 | Passing ISO 14001¡G 1996 environment managing system DNV certification. |
| 2000 | Passing QS 9000¡G 1998 quality managing system DNV certification. |
| 2003 | Passing the ISO 9001¡G2000 quality managing system new version DNV certification. |
| 2004 | Passing OHSAS 18001¡G1999 occupational safety sanitation managing system DNV certification. |
| 2005 | Passing ISO 14001¡G 2004 environment managing system new version DNV certification. |
| 2010 | Passing OHSAS 18001¡G2007 occupational safety sanitation managing system DNV certification. |
| 2010 | Passing the ISO 9001¡G2008 quality managing system new version BV certification. |
| 2010 | Passing ISO/TS 16949¡G 2009 environment managing system new version BV certification. |
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