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he construction of NEPSI testing laboratory, initiated in SIPAI in 1979, was completed in 1985. All the testing facilities are designed and made by SIPAI in accordance with the requirements specified in IEC 60079 family publications and Chinese GB 3836 family national standards. 

The integration of NEPSI with the Reliability and Environmental Test Laboratory (RET) of SIPAI, which was first accredited in October 1987 by Lloyd's Register of Shipping of United Kingdom, has formed a complete system for explosion protection tests. It was in January 1996 that NEPSI was officially approved and named by the Ministry of Labor as "National Supervision and Inspection Center for Explosion Protection and Safety of Instrumentation".¡¡

As an important part of SIPAI Inspection and Testing Institute of Instruments and Automatic Systems (SITIIAS for short), NEPSI was approbated by China National Accreditation Committee of Laboratories (CNACL) and China Commodity Inspection Bureau Laboratory Accreditation Committee (CCIBLAC) for its personnel qualification, management system, testing facilities and measuring instruments. Among its technical staff, most are engineers or senior engineers with more than ten years of experience. Some of them once trained, visited or did cooperative research work in famous international organizations, such as SIRA, Factory Mutual Research Cooperation (FMRC), Physikalisch-Technische Bundesanstalt (PTB), Bergbau-Versuchsstrecke of DMT Company (DMT/BVS), Technischer Uberwachungs-Verein, Hannover (TUV Hannover), Laboratoire Central des Industries Electriques (LCIE), TIIS and TESTSAFE/SIMTARS. Some of them are members of Chinese National Standardization Committee for Explosion-protected Electrical Equipment, Chinese Society of Labor Protection, Shanghai Special Committee for Fire and Explosion Protection, Explosion-protected Electrical Equipment Committee of Instrument Society of America (ISA SP12), IECEx International Certification Scheme, international assessor of IECEx Scheme.

Supported by government departments concerned, NEPSI gets progressive increase in testing competence, businesses, and international exchange and co-operation, and enjoys good reputation both at home and abroad. NEPSI has been recommended as a candidate laboratory for IECEx Scheme by China State Bureau of Quality and Technical Supervision

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NEPSI, authorized by the government, is mainly engaged in research and development of explosion protection technology, testing and verification of various explosion-protected apparatus, as well as safety supervision for users of explosion-protected instruments and safety assessment of explosion protection engineering projects in accordance with the instructions of the government departments.