We are a company that build and convert trucks for explosive atmospheres. Under our quality assessment proceedures we re-issue the CE mark and issue the EX mark. We are liable for the equipment but the customer is also liable under ATEX 137 in Europe for the working area. Rest of the world i'm not sure on. Try a certification body for an answer and read the DTI guidlines on ATEX. We use a body whoa udits us on a regular basis and has just issued us a licence number to certify equipment.
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