I.S. EN 12890:2000

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Order information and delivery conditions
  4.1 General
  4.2 Points to be agreed
  4.3 Mandatory information
5 Classification
6 Specifications
  6.1 General
  6.2 Designation
7 Manufacturing requirements
  7.1 Materials
  7.2 Manufacture
  7.3 Contractions
  7.4 Tapers
  7.5 Clearances
  7.6 Required machining allowances (RMA)
  7.7 Dimensional tolerances
  7.8 Surface coating
8 Quality control
9 Usage
  9.1 General
  9.2 Identification
  9.3 Modifications
  9.4 Repair and refurbishment
  9.5 Protection and packaging for transportation and storage
Table 1 Quality classes for patterns, pattern equipment and
         coreboxes
Table 2 Quality classes - patterns, pattern equipment and
         coreboxes made of wood
Table 3 Quality classes - patterns, pattern equipment and
         coreboxes made of metal
Table 4 Quality classes - patterns, pattern equipment ant
         coreboxes made of plastic
Table 5 Characteristics of patterns and pattern equipment
Table 6 Characteristics of coreboxes
Table 7 Tapers
Table 8 Surface coatings (painting and colour-coding of
         patterns, pattern equipment and coreboxes
Figure 1 Examples of clearance of core prints (vertical core)
Figure 2 Example of clearances of core prints (horizontal
         core)
Figure 3 Values of clearances of core prints (for moulding
         with horizontal joint surface)
Annex A (informative) Guidelines on the use of tables in this
         standard
Annex B (informative) Reference values for linear casting
         contractions
Bibliography

Describes the requirements for patterns, pattern equipment and coreboxes for the production of sand moulds and/or sand cores.