Standard No.:	GB/T 12620-2008
English Name:	Round and elongated apertures with round and square plate screens
Chinese Name:	长圆孔、长方孔和圆孔筛板
Chinese Classification:	A28    Sieving, Sieve Plate and Sieve Screen
Professional Classification:	GB    National Standard
Source Content Issued by:	MOC; AQSIQ
Issued on:	April 16, 2008
Implemented on:	2008-10-1
Status:	valid
Superseding:	GB/T 3943-1983 Perforated plate with round and elongated apertures GB/T 12620-1990 Slots with round end and slots with square end plate screens
Target Language:	English
File Format:	PDF
Word Count:	4000 words
Translation Price(USD):	100.0
Delivery:	via email in 1 business day

1 Scope This Standard specifies the types and parameters, technical requirements, inspection rules, marking, packing, transport and storage of metal round and elongated aperture, elongated and square aperture and round aperture screen plate. This Standard is applicable to the screen plate for screening, ventilation, decoration, mineral processing, grain, oil material and feed processing, sifting and filtering, the aperture shape is round and elongated aperture, square and elongated aperture, and round aperture. 2 Normative References The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments (excluding amending errors in the text) to, or revisions of, any of these publications do not apply. However, all parties coming to an agreement according to this standard are encouraged to study whether the latest editions of these documents are applicable. For undated references, the latest edition of the normative documents referred to applies. GB/T 708 Dimension, Shape, Weight and Tolerances for Cold-rolled Steel Plates and Sheets GB/T 1804 Tolerances and Fits-Limit Deviations of Dimensions without Individual Tolerance Indications (GB/T 1804-2000, eqv ISO 2768-1: 1989) GB/T 2828.1 Sampling Procedures for Inspection by Attributes - Part1: Sampling Schemes Indexed by Acceptance Quality Limit (AQL) for Lot-by-lot Inspection (GB/T 2828.1-2003, ISO 2859-1: 1999, IDT) GB/T 10061 Screen Plates - Codification for Designating Perforations (GB/T 10061-1988, eqv ISO 7806:1983) GB/T 15602 Industrial Screens and Screening Vocabulary (GB/T 15602-1995, eqv ISO 9045:1990) GB/T 19360 Industrial Plate Screens - Specifications and Test Methods (GB/T 19360-2003, ISO 10630:1994, IDT)

Foreword I 1 Scope 2 Normative References 3 Terms and Symbols 4 Types and Parameters 5 Technical Requirements 6 Test Methods and Inspection Rules 7 Marking, Packing, Transport and Storage Appendix A (Informative) General Requirements of Heat Treatment on Screen Plate