CEN/TC 145/WG 9 - Reaction injection moulding machines - Safety

This document specifies the essential safety requirements applicable to the design and construction of reaction moulding machines and plants as defined in 3.1 and 3.2.
This document deals with all significant hazards, hazardous situations or hazardous events during all phases of the machine life cycle (see EN ISO 12100:2010, 5.4), when reaction moulding machines and plants are used as intended and under conditions of misuse that are reasonably foreseeable by the manufacturer (see Annex A).
A reaction moulding machine begins at the working tank(s) and ends at the mixing head(s).
A reaction moulding plant begins at the working tank(s) and ends at the product shaping and transport equipment or at the moulding equipment (see 3.6 and 3.7).
This document is not applicable to reaction moulding machines and plants manufactured before the date of its publication.
NOTE   Reaction moulding machines and plants usually do not produce explosive atmospheres. Where materials are processed, which may cause an explosive atmosphere, the Directive 2014/34/EU on the Equipment intended for use in Potentially Explosive Atmospheres (ATEX) can be applied.
Explosion hazards are not dealt with in this document.
Fire hazards are not dealt with in this document.
This document does not cover the requirements for the design of the exhaust systems.

This standard specifies the health and safety requirements for the design of metering and mixing units for reaction moulding machines. The significant and specific hazards are listed in clause 4 and are dealt with in this standard.
This standard does not cover completely the hazards arising from the use of highly flammable additives, for example, pentane used as a blowing agent (see 4.7), because these hazards depend to a large extent on the additives and processes used.
This standard does not cover the hazards arising from the assembly of separate units not supplied at the same time by the same manufacturer.
This standard does not cover the hazards arising from the movement of powered mixing heads; for these, see "EN 1612-2".
This standard applies to metering and mixing units manufactured after the date of publication of this standard.

This standard covers the essential health and safety requirements for the design of reaction moulding plant with the exception of metering and mixing units (for these see part 1).
The significant and specific hazards are listed in clause 4 and are dealt with in this standard.
This standard does not cover completely the hazards arising from the use of highly flammable additives, for example pentane used as a blowing agent (see 4.3), because these hazards depend to a large extent on the additives and process used.
This standard does not cover the hazards due to noise generated by the cutting unit, which is the only significant source of noise at such plant.
This standard does not cover the requirements for the design of exhaust systems.
This standard does not cover the hazards arising from the assembly of separate units not supplied at the same time by the same manufacturer.
This standard applies to reaction moulding plant manufactured after the date of publication of this standard.
NOTE   Directive 94/9/EC concerning equipment and protective systems intended for use in potentially explosive atmospheres can be applicable to the type of machine or equipment covered by this European Standard. The present standard is not intended to provide means of complying with the essential health and safety requirements of Directive 94/9/EC.

This standard specifies the health and safety requirements for the design of metering and mixing units for reaction moulding machines.  The significant and specific hazards are listed in clause 4 and are dealt with in this standard.   This standard does not cover completely the hazards arising from the use of highly flammable additives, for example pentane used as a blowing agent (see 4.7), because these hazards depend to a large extent on the additives and processes used.  This standard does not cover the hazards arising from the assembly of separate units not supplied at the same time by the same manufacturer.  This standard does not cover the hazards arising from the movement of powered mixing heads; for these, see prEN 1612-2.    This standard applies to metering and mixing units manufactured after the date of publication of this standard.