This draft European standard specifies the essential safety requirements applicable to the design and construction of reaction moulding machines and plants. The significant and specific hazards are listed in Annex A and are dealt with in this draft European standard. This draft European standard does not cover the hazards related to the cutting unit (see EN 14886:2008). This draft European standard does not cover the requirements for the design of exhaust systems. This draft European standard does not cover the hazards arising from the assembly of separate units not supplied at the same time by the same manufacturer. This draft European standard applies to reaction moulding machines and plants manufactured after its date of publication. Reaction moulding machines usually do not produce explosive atmospheres. Where materials are processed, which may cause an explosive atmosphere, the Directive 94/9/EC on the Equipment intended for use in Potentially Explosive Atmospheres (ATEX) should be applied. Explosion hazards are not dealt with in this document.