Global Vision

2007-09-08 13:28:00
Global Vision

-- Download a 1-page overview of UL's global HazLoc services!

UL's conformity assessment services for hazardous locations equipment can help you gain access to the global marketplace. Whether your product is heading for a North Atlantic oil platform, a Brazilian petrochemical facility, drilling operations on the Alaskan/Canadian oil fields or other areas, UL and its global family of companies provide in-depth knowledge and expertise to help you meet international safety requirements and obtain product export approvals.

Through key national and international governmental accreditations, along with cooperative relationships with other international organizations, UL can evaluate products to the regulations and standards of other countries, and facilitate access into markets around the globe, with one product submittal.

IECEx Scheme

-- Download a 1-page summary of the IECEx Scheme!

Through the IECEx Scheme, UL is the first HazLoc testing and certification organization in the U.S. that can provide market access into twenty-six (26) countries around the globe. These twenty-six countries include: Australia, Canada, China, Czech Republic, Denmark, Finland, France, Germany, Hungary, India, Italy, Japan, Korea, Netherlands, New Zealand, Norway, Romania, Russia, Serbia & Montenegro, Singapore, Slovenia, South Africa, Sweden, Switzerland, United Kingdom, USA.

The IECEx Scheme is an international HazLoc conformity assessment scheme. The objective of this IEC Scheme is to facilitate international trade in electrical equipment intended for use in, or relating to, explosive atmospheres (commonly referred to as "Ex equipment"). This objective includes:

  • reduced testing and certification costs to manufacturer;
  • reduced time to market;
  • international confidence in the product assessment process; and
  • one international database listing.

UL is represented on the IECEx Scheme’s Management Committee (ExMC) and Testing and Assessment Group (ExTAG) by staff from UL International Demko A/S (Denmark), and staff from UL Northbrook (USA). Further, staff from UL do Brasil (Brazil) have attended in the position of observer based on the expectation of Brazil formally joining the Scheme in the near future. Regarding UL Demko’s and UL Northbrook's involvement in the Scheme, both are recognized as Ex Certification Bodies (ExCBs) and Ex Testing Laboratories (ExTLs), based on peer-assessment. Also, UL serves as the Chairman of the IEC ExTAG and of the USNC/IECEx committee.

UL's recognition as an ExCB and ExTL addresses the following protection methods: Flameproof 'd', Pressurization 'p', Powder filling 'q', Oil-immersion 'o', Increased safety 'e', Intrinsic safety 'i' (including systems), Nonincendive 'n', and Encapsulation 'm'. UL's recognition as an ExCB and ExTL also includes Electrical apparatus for the detection and measurement of flammable gases, Fieldbus concepts of FISCO and FNICO, and Electrical resistance trace heating. This allows for the evaluation under the IECEx Scheme of equipment including: enclosures, luminaires, terminal blocks, control stations, process control equipment, programmable logic controllers, contact blocks, metering equipment, push-button stations, motors, gas detectors, and much more. Learn additional details on the IECEx Scheme.


-- See an overview of the European hazardous locations system.

UL's hazardous locations staff are here to meet the needs of manufacturers seeking certification under the European Potentially Explosive Atmospheres (ATEX) Directive (94/9/EC) -- in addition to other European Directives that may also apply, such as the Electromagnetic Compatibility (89/336/EEC) or Machinery (98/37/EC) Directives.

Regarding the ATEX Directive, UL International Demko A/S, a wholly-owned affiliate of UL, is designated in the European community as a Notified Body for all Group I (mining) and Group II (non-mining) equipment, protective systems and components. This Notified Body status allows Certificates of Conformity and Certificates of Component issued by UL Demko to be recognized by all European Community member states as a legal means of entry under the ATEX Directive.

As a means to facilitate certification under the ATEX Directive, UL Demko has accredited members of UL's HazLoc team at UL's Northbrook, IL (USA) office as Demko Qualified Engineers (DQE's) and Demko Qualified Reviewers (DQR's) with project-level and review-level status under the ATEX Directive. Also, UL HazLoc staff at UL Northbrook are accredited as Demko Qualified Auditors (DQA's) under the ATEX Directive.

North America

-- See an overview of the North American hazardous locations system.

United States of America

Within the U.S., UL has hazardous locations accreditation to perform testing and certification for all product categories and protection methods. Under either the U.S. Division or Zone area classification systems, the UL Mark is recognized and accepted throughout industry. Manufacturers, users, and the inspection and regulatory community all look to UL for certifications based on UL, IEC, IEEE, ISA, NEMA, NFPA, and USCG requirements. Also, UL can assist with testing in accordance with Mine Safety and Health Administration (MSHA) regulations as a means to facilitate obtaining MSHA certification for U.S. surface and underground mines.


The Canadian hazardous locations market can be made more accessible by obtaining UL's own C-UL Mark, or by working with UL to obtain certification through Underwriters' Laboratories of Canada (ULC)(ULC), an affiliate of UL. These Marks allow UL to directly perform all hazardous locations testing and certification for all protection methods and product categories under either the Canadian Division or Zone area classification system. Both the C-UL and ULC options meet Canadian National requirements as authorized by the Standards Council of Canada (SCC). Either mark is accepted in all provinces throughout Canada.

Note - UL International Demko A/S is able to perform testing in accordance with U.S. and Canadian standards for the purpose of achieving UL, C-UL and ULC certification.

Latin America

For hazardous locations in Latin American markets, in general, compliance with either Division or IEC-based Zone standards is required. The UL-Br Mark can be used as a means to assist in demonstrating this compliance. For further assistance with Latin American certification issues, UL has local divisions located in Argentina, Brazil and Mexico. Click here for further details on these UL locations.


As of July 24, 1996, electrical equipment intended for hazardous locations within Brazil is required to bear the INMETRO (Brazilian Institute for Metrology, Standardization and Industrial Quality) mark in accordance with the mandatory INMETRO Regulation 121. Under this regulation, the Brazilian testing requirements and certification criteria for hazardous locations equipment are detailed in INMETRO Norm NIE-DINQP-096 (Rev.1 - Feb/2000). Regarding testing requirements, this Norm basically specifies compliance with the applicable IEC or CENELEC Zone standards, with some national deviations regarding general and flameproof requirements.

As a means to simplify the certification process to obtain the INMETRO mark, UL do Brasil, an affiliate of UL located in São Paulo, maintains INMETRO accreditation, with staff very knowledgeable in both the technical and governmental aspects of this regulation. UL is also expanding existing relationships and establishing new relationships with testing and certification organizations within Brazil.


As of August 18, 1998, most electrical/electronic equipment that is intended to be marketed within Argentina needs to comply with the mandatory compliance law, Resolution 92/98. Implementation of the requirements of Resolution 92/98 is being done in three phases.

For electrical equipment intended for hazardous locations, as of July 18, 2000, certain types/applications of this equipment will need to comply with Phase III of Resolution 92/98. Under this phase, manufacturers must comply with the applicable IEC-based Zone requirements (taking into account Argentine deviations such as power ratings and the need for markings/instructions to be in Spanish) and obtain the appropriate third-party certification marks.

UL de Argentina S.R.L., an affiliate of UL located in Buenos Aires, can assist in determining the applicable effective date for your specific type and application of HazLoc equipment and simplify the certification process associated with Resolution 92/98. UL de Argentina staff maintain accreditation under this regulation, with staff very knowledgeable in both the technical and governmental aspects of this regulation ready to assist you.


For hazardous locations in Asia-Pacific markets, in general, compliance with either Division requirements or IEC-based Zone requirements is required. The UL Mark can be used as a means to assist in demonstrating this compliance. For further assistance with Asia-Pacific certification issues, UL has local divisions located in Hong Kong, India, Japan, Korea, Mainland China, Malaysia, Singapore, Tailand and Taiwan. Click here for further details on these UL locations.


For hazardous locations in Australian markets, the IECEx Scheme provides direct access. As a means to further facilitate this process, UL can work with local Australian HazLoc testing and certification agencies to obtain any further approvals that may be desired. UL's staff located in the Asia-Pacific region (see above) are also available to assist you with issues pertaining to the Australian marketplace.


In an effort to provide further HazLoc services within China, UL has established a relationship with the China National Quality Supervision and Test Center for Explosion Protected Electrical Products (CQST), located in Nanyang, Henan. CQST is the only national ministry level certification body for HazLoc equipment within China, and provides the following services:

  • Certification of explosion protected equipment, which includes examination and testing of the unit;
  • Inspection and certification of performance testing and quality assurance systems for explosion protected equipment; and
  • Research and development on the testing method and special test equipment for explosion protected equipment.

CQST is a part of the China Nanyang Explosion Protected Electrical Apparatus Research Institute (CNEx). CNEx is a professional institute in the field of explosion protection. CQST is also an affiliate of the China State Bureau of Quality and Technical Supervision (CSBQTS). In April 2000, CSBQTS and SAIQ merged, with the new name for the combined organization after this merger being the State General Administration for Quality Supervision and Inspection and Quarantine (AQSIQ). AQSIQ is the government agency in charge of the inspection and certification industry.

Regarding basic testing requirements, in general, they are in accordance with the applicable IEC Zone standards, with some national deviations. Learn additional details on the applicable Chinese national standards for explosion protected electrical apparatus.


Regarding the Japanese HazLoc market, both UL International Demko A/S and UL Northbrook (USA) maintain "Designated Foreign Testing Body" accreditation by Japan's Ministry of Health, Labour and Welfare (MHLW). This accreditation allows hazardous locations testing conducted by UL Demko and UL Northbrook to be fully accepted by the Technology Institution of Industrial Safety (TIIS) as the basis for Japanese national certification.

TIIS is the sole national authority designated by the Ministry of Health, Labour and Welfare (MHLW) for certification of electrical apparatus for use in potentially explosive atmospheres of surface industries within Japan. The Ministry of Health, Labour and Welfare (MHLW) is a combination of the Ministry of Labour (MoL) and the Ministry of Health and Welfare (MHW) that resulted from reorganization within the Japanese government at the beginning of 2001.

Regarding applicable testing and certification requirements, they are either in accordance with the JIS C 0930 series of standards (the traditional Japanese standards for explosion-protected electrical apparatus), or are in accordance with the IEC 60079 series of standards. According to either the existing JIS C0930 series, or the IEC 60079 series, the TIIS Code of certification (Ex marking requirements) can be summarized as follows:

  • Protection methods:
    d = flameproof (same concept as in IEC 60079-1, 1990)
    e = increased safety (same concept as in IEC 60079-7, 1990)
    i = intrinsic safety (same concept as in IEC 60079-11, 1991)
    o = oil immersion (same concept as in IEC 60079-6, 1968)
    p = pressurization (same concept as in IEC 60079-2, 1983)
    Note - The protection methods: 'm', 'q', and 'n', have not yet been adopted by the MHLW, and therefore are not available as a certification option through TIIS.
  • Explosion grades (Gas groups in IEC):
    1 = propane (same as IIA in IEC)
    2 = ethylene (same as IIB in IEC)
    3a = hydrogen (same as IIB + H2 in IEC)
    3b = carbon disulfide (IIB + CS2 in IEC)
    3c = acetylene (IIB + C2H2 in IEC)
    3n = all the gases in grade 3 (same as IIC in IEC)
  • Ignition categories (Temperature codes in IEC):
    G1 = 450°C (same as T1 in IEC) × 0.8 - 40°C = 320°C rise
    G2 = 300°C (same as T2 in IEC) × 0.8 - 40°C = 200°C rise
    G3 = 200°C (same as T3 in IEC) × 0.8 - 40°C = 120°C rise
    G4 = 135°C (same as T4 in IEC) × 0.8 - 40°C = 68°C rise
    G5 = 100°C (same as T5 in IEC) × 0.8 - 40°C = 40°C rise
    G6 = 85°C (same as T6 in IEC) × 0.8 - 40°C = 28°C rise

The following are two examples of Japanese Ex marking requirements, and how they relate to IEC Ex marking requirements:

Japanese Ex marking

IECEx marking


d IIB T4


e T3

Commonwealth of Independent States (CIS)

The European and Asian countries that comprise the Commonwealth of Independent States (CIS) are Azerbaijan, Armenia, Belarus, Georgia, Kazakhstan, Kyrgyzstan, Moldova, Russia, Tajikistan, Turkmenistan, Uzbekistan and Ukraine. In general, compliance with Division or Zone standards is required.

The IECEx Scheme provides an ideal venue to assist with access into this marketplace. As an additional means to facilitate this certification process, UL can work with the following local agency to obtain any necessary approvals.

Other international markets

Other international markets also require compliance with either Division or IEC-based Zone standards. The UL Mark can be used as a means to assist in demonstrating this compliance. In addition, the IECEx Scheme can help obtain the needed market access.

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