EN 1248:2001

SLOVENSKI STANDARD
01-januar-2002
Foundry machinery - Safety requirements for abrasive blasting equipment
Foundry Machinery - Safety requirements for abrasive blasting equipment
Gießereimaschinen - Sicherheitsanforderungen für

Strahlanlagen
Machines de fonderie - Prescriptions de sécurité pour équipements de grenaillage
Ta slovenski standard je istoveten z: EN 1248:2001
ICS:
25.120.30 Livarska oprema Moulding equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 1248
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2001
ICS 25.120.30
English version
Foundry Machinery - Safety requirements for abrasive blasting
equipment
Machines de fonderie - Prescriptions de sécurité pour Gießereimaschinen - Sicherheitsanforderungen für
équipements de grenaillage Strahlanlagen
This European Standard was approved by CEN on 8 March 2001.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2001 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 1248:2001 E
worldwide for CEN national Members.

Page 2
Contents
Page
INTRODUCTION 3
1SCOPE 4
2 NORMATIVE REFERENCES 5
3 TERMS AND DEFINITIONS 7
4 HAZARDS 8
5 SAFETY REQUIREMENTS AND/OR MEASURES 9
5.1 General 9
5.2 Centrifugal wheel assembly (see Annex B, figures B.2 and B.3) 10
5.3 Blasting chamber 10
5.4 Abrasive media and contaminants conveying system 16
5.5 Abrasive media and contaminants cleaning, separation and storage device 17
5.6 Power and driving devices 18
5.7 Loading and unloading systems for workpieces 18
5.8 Requirements for control systems 24
5.9 Electrical hazards 24
5.10 Electrostatic phenomena 26
5.11 Noise 26
5.12 Substances 27
5.13 Operator environment - walk in air blast rooms 29
5.14 Operator environment - outside manual operated blasting chamber and hand
blasting chamber 32
6 VERIFICATION OF THE SAFETY REQUIREMENTS AND/OR
MEASURES 34
7 INFORMATION FOR USE 34
7.1 Marking 34
7.2 Technical data and description for safety 34
7.3 Instruction handbook 35
7.4 Maintenance manual 35
8 MAXIMUM CONCENTRATION OF HAZARDOUS SUBSTANCES
IN SHOT BLASTING ABRASIVES 36
ANNEX A (NORMATIVE) Description of equipment covered by this standard 37
ANNEX B (INFORMATIVE) Illustrative solutions for safety measures of
blasting equipment 38
ANNEX ZA (INFORMATIVE) Relationship of this document with EC
Directives 45
BIBLIOGRAPHY 47
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FOREWORD
This European Standard has been prepared by Technical Committee CEN/TC 202 "Foundry
machinery", the secretariat of which is held by DIN.
This European Standard shall be given the status of a national standard, either by publication
of an identical text or by endorsement, at the latest by October 2001, and conflicting national
standards shall be withdrawn at the latest by October 2001.
This European Standard has been prepared under a mandate given to CEN by the European
Commission and the European Free Trade Association, and supports essential requirements of
EC Directive(s).
For relationship with EC Directive(s), see informative Annex ZA, which is an integral part of
this standard.
An assessment of the foreseeable risks arising from the use of the equipment was carried out
when this standard was drafted by CEN/TC 202/WG 4, comprising experts from the following
countries: France, Germany, Italy, Sweden and United Kingdom.
Annex A is normative, and Annex B is informative.
According to the CEN/CENELEC Internal Regulations, the national standards organizations
of the following countries are bound to implement this European Standard: Austria, Belgium,
Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy,
Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United
Kingdom.
INTRODUCTION
This European standard is a type C standard as defined in EN 292.
The equipment and hazards covered by this standard are shown in the scope. In addition,
abrasive blasting machinery shall comply, as appropriate with EN 292-1 and EN 292-2 for
hazards which are not covered by this standard.

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1SCOPE
This standard specifies requirements to be met by the manufacturer of abrasive blasting
equipment for the foreseeable significant hazards due to design, construction and installation,
during commissioning, operation, maintenance and decommissioning of the equipment which
employ either centrifugal force or compressed air as a means of accelerating abrasive to
achieve the desired result.
Abrasive blasting equipment covers:

centrifugal blasting machines;

air blasting machines;

loading, conveying and unloading systems for the workpieces.
See Annex A for more details.
This standard covers all foreseeable significant hazards which could be encountered during
the lifetime of the machine as listed in clause 5.
This standard does not apply to:

mobile centrifugal blasting equipment;

mobile air blasting equipment;

wet blasting equipment;

the general works compressed air supply system.

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2 NORMATIVE REFERENCES
This Standard incorporates by dated or undated references provisions from other publications.
These normative references are cited at the appropriate places in the text and the publications
are listed hereafter. For dated references, subsequent amendments to or revisions of any of
these publications apply to this European Standard only when incorporated in it by
amendment or revision. For undated references the latest edition of the publication referred to
applies (including amendments).
EN 271 Respiratory protective devices - Compressed air line or powered fresh
air hose breathing apparatus incorporating a hood for use in abrasive
blasting operations
EN 286-1 Simple unfired pressure vessels designed to contain air or nitrogen
Part 1: Design manufacture and testing
EN 292-1:1991 Safety of machinery - Basic concepts, general principles for design
Part 1: Basic terminology, methodology
EN 292-2:1991+ Safety of machinery - Basic concepts, general principles for design -
A1:1995 Part 2: Technical principles and specifications
EN 294 Safety of machinery - Safety distances to prevent danger zones being
reached by the upper limbs
EN 349 Safety of machinery - Minimum distances to avoid crushing of parts
of the human body
EN 418:1992 Safety of machinery - Emergency stop equipment, functional aspects;
Principles for design
EN 626-1 Safety of machinery – Reduction of risks to health from hazardous
substances emitted by machinery
Part 1: Principles and specifications for machinery manufacturers
EN 775+AC:1993 Manipulating Industrial robots – safety (ISO 10218:1992, modified)
EN 953 Safety of machinery – General requirements for the design and
construction of guards (fixed, moveable)
EN 954-1:1996 Safety of machinery - Safety related parts of control systems
Part 1: General principles for design
EN 982 Safety of machinery - Safety requirements for fluid power systems and
their components - hydraulics
EN 999 Safety of machinery – The positioning of protective equipment in
respect of approach speeds of parts of the human body

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EN 1037 Safety of machinery - Prevention of unexpected start-up
EN 1070 Safety of machinery - Terminology
EN 1088:1995 Safety of machinery - Interlocking devices associated with guards –
Principles for design and selection
EN 1265 Noise test code for foundry machines and equipment
EN 60204-1:1997 Safety of machinery - Electrical equipment of machines -
Part 1: General requirements.
(IEC 60204-1:1997)
EN 60529 Degrees of protection provided by enclosures (IP-Code);
(IEC 60529:1989)
prEN 620:1992 Continuous handling equipment and systems – Fixed belt conveyors
for bulk material – Special safety requirements for design,
manufacturing, erection and commissioning stages
prEN 1005-3:1993 Safety of machinery - Human physical performance
Part 3: Recommended force limits for machinery operation
EN ISO 11124-1 Preparation of steel substrates before application of paints and related
products - Specifications for metallic blast-cleaning abrasives - Part 1:
General introduction and classification
(ISO 11124-1:1993)
EN ISO 11126-1 Preparation of steel substrates before application of paints and related
products - Specifications for non-metallic blast-cleaning abrasives -
Part 1: General introduction and classification
(ISO 11126-1:1993, including Technical Corrigenda 1:1997 and
2:1997)
EN ISO 11688-1 Acoustics - Recommended practice for the design of low-noise
machinery and equipment
Part 1: Planning
(ISO/TR 11688-1:1995)
CENELEC R044-001, Safety of machinery – Guidance and recommendations for the
February 1999 avoidance of hazards due to static electricity

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3 TERMS AND DEFINITIONS
For the purposes of this standard, the terms and definitions given in EN 1070 apply.
Other terms and definitions are as follows:
3.1
blasting
process where workpiece to be cleaned or surface to be treated is subjected to continuous
attack by abrasive blasting media to achieve the desired result
3.2
blasting equipment
machines employing either centrifugal force or compressed air as a means of accelerating
abrasive.
The equipment comprises a chamber which contains the workpiece and also prevents the
abrasive media from escaping to the environment after impacting on the workpiece.
It also incorporates: a system for collecting, recycling, cleaning by air or magnetic separation
or a combination of both and storage for the abrasive media ready to feed back to the dosing
device for abrasive media (for examples of blasting equipment types see Annex A, for an
example of a processing scheme see Annex B, Figure B.1) and a conveying system for
workpieces.
3.3
abrasive media
granular metallic or non-metallic material to be forcibly applied to a surface to achieve the
desired result
Classification of metallic abrasives see EN ISO 11124-1, of non-metallic abrasives see
EN ISO 11126-1.
3.4
free-jet work
a manual blasting process carried out with hand held nozzles where protective separation
between the operator and the rebounding abrasive media and generated dust. The operator
shall wear an abrasive blasting helmet and other protective clothing.
3.5
exhaust system
extraction device which collects contaminated air under a slight negative pressure and
transports it via appropriate ducting to a dust collector
3.6
dust separator
air cleaning device to remove contaminated particulates prior to discharge to the atmosphere
3.7
explosion relief panel
device to release pressure safely and rapidly

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3.8
transfer car
vehicle used for transporting the workpieces into and out of the blasting chamber
NOTE The vehicle is often on rails.
3.9
machine setting
control of the actuation of a mechanism during setting phases when the machine is manually
controlled; guards having been by-passed
3.10
manual operation
any sequence or event which is manually controlled by the operator
3.11
automatic operation
every cycle initiates the next cycle automatically whereby all supplementary steps are carried
out by a predetermined program
4 HAZARDS
Abrasive blasting equipment shall be designed to take into consideration the hazards, the
safety requirements and the preventative measures referred to in clause 5.
A parameter for the level of safety measures to be applied is the risk of accident to be
expected, the extent of which depends upon the highest foreseeable degree of severity and
effect as well as the probability of an injury e.g. exposure to risk (frequency of intervention or
access or duration of stay in a danger zone). Movable safeguards or facilities with guarding
functions in danger zones with fixed cycle intervention or access (e.g. during filling with
molten metal, periodical manual cleaning, or trouble shooting) require a special degree of
safety against unexpected start up or dangerous movements, as well as against hazardous
sources and failure of relevant safeguards and control systems.
An assessment of the foreseeable risks arising from the intended use of the equipment was
carried out when this standard was prepared. When additional risks are present it is
recommended that EN 292-1 and EN 292-2 together with the relevant A and B standards are
used as a basis for dealing with these additional risks.
This assessment formed the basis for determining
a) The safety features which shall be incorporated into the equipment;
b) Any special instructions which shall be communicated to the user.
The hazards and hazardous situations are tabulated in clause 5 (table 1) together with the
appropriate safety measures.
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5 SAFETY REQUIREMENTS AND/OR MEASURES
5.1 General
The preventative measures assigned in table 1 to the identified hazardous situations shall be
provided by the manufacturer.
In addition, equipment shall comply, as appropriate, with the standards given in clause 2.
Where access is gained through guards/doors into a working area the safety related parts of the
electro-mechanical/electronic control system shall be in accordance with category 3 of
EN 954-1:1996. The hydraulic and pneumatic systems shall be in accordance with category 1
of EN 954-1:1996.
Emergency stop equipment shall be in accordance with EN 418 (where applicable, for
determination of categories see table 1).
Where it is possible to gain access to a hazardous area which is not protected by a movable
guard or door, access shall be preven
...