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GB/T 12620-2008: Round and elongated apertures with round and square plate screens
Status: Valid GB/T 12620: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 12620-2008 | English | 299 |
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3 days [Need to translate]
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Round and elongated apertures with round and square plate screens
| Valid |
GB/T 12620-2008
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| GB/T 12620-1990 | English | 239 |
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2 days [Need to translate]
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Slots with round end and slots with square end plate screens
| Obsolete |
GB/T 12620-1990
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PDF similar to GB/T 12620-2008
Basic data | Standard ID | GB/T 12620-2008 (GB/T12620-2008) | | Description (Translated English) | Round and elongated apertures with round and square plate screens | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | A28 | | Classification of International Standard | 73.120 | | Word Count Estimation | 13,124 | | Date of Issue | 2008-04-16 | | Date of Implementation | 2008-10-01 | | Older Standard (superseded by this standard) | GB/T 12620-1990; GB/T 3943-1983 | | Quoted Standard | GB/T 708; GB/T 1804; GB/T 2828.1; GB/T 10061; GB/T 15602; GB/T 19360 | | Regulation (derived from) | Announcement of Newly Approved National Standards No. 5, 2008 (No. 118 overall) | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | | Summary | This standard specifies the long metal hole, rectangular and round hole sieve type and parameters, technical requirements, inspection rules, marking, packaging, transportation and storage. This standard applies to screening, ventilation, decoration, dressing, food, fuel, feed processing, screening and filtration purposes sieve having a pore shape for the long hole, rectangular and round hole. | GB/T 12620-2008: Round and elongated apertures with round and square plate screens---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Round and elongated apertures with round and square plate screens
ICS 73.120
A28
National Standards of People's Republic of China
Replacing GB/T 12620-1990, GB/T 3943-1983
Long hole, rectangular and round hole sieve
Posted 2008-04-16
2008-10-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This standard replaces GB/T 12620-1990 "long hole and rectangular hole sieve" and GB/T 3943-1983 "hole and long hole sieve."
This standard and GB/T 12620-1990 and GB/T 3943-1983 compared to the main modifications are as follows.
--- Increasing the scope;
--- Terminology content has been adjusted;
--- Modify the long hole and rectangular hole sieve sieve basic dimensions and parameters in Table 1, Table 2 and Table 3 mesh width limit deviation;
--- Increasing the arrangement pattern;
--- Sieve materials increased by 5.1, 5.2 specified thickness of 5.4 sieve does not allow corrosion and other requirements;
--- Modify the rules of sampling 6.5 and 6.6 inspection requirements;
--- Revised 5.5 sieve processing requirements;
--- Finished sieve to remove some specific requirements, inspection rules, in order to meet the needs of different users;
--- Deleted provisions sieve number, to avoid confusion caused by too many varieties.
Appendix A of this standard is an informative annex.
The standard method of inspection by the National Standardization Technical Committee sieved and granules points and focal points.
This standard was drafted. the machine Productivity Promotion Center, Hunan Wujiang Screen Machine Limited.
The main drafters of this standard. Yu Fang, Wan Jun, Sun An.
This standard replaces the standards previously issued as follows.
--- GB/T 12620-1990;
--- GB/T 3943-1983.
Long hole, rectangular and round hole sieve
1 Scope
This standard specifies the metal long hole, rectangular and round hole sieve types and parameters, technical requirements, inspection rules, marking, packaging, transport
Transport and storage.
This standard applies to screening, ventilation, decoration, dressing, food, fuel, feed processing, screening and filtration purposes sieve, which is a long hole shape
Hole, rectangular and round hole.
2 Normative references
The following standards contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent
Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research
Whether to use the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.
Size GB/T 708 cold rolled steel sheet and strip, shape, weight and tolerance
GB/T 1804 with tolerance and without individual tolerance size limit deviation (GB/T 1804-2000, eqv ISO 2768-1. 1989)
GB/T 2828.1 Sampling procedures for inspection - Part 1. by acceptance quality limit (AQL) retrieval batch inspection sampling plan
(GB/T 2828.1-2003, ISO 2859-1.1999, IDT)
GB/T 10061 mesh sieve marking method (GB/T 10061-1988, eqv ISO 7806. 1983)
GB/T 15602 Industrial screens and screening Terminology (GB/T 15602-1995, eqv ISO 9045.1990)
GB/T 19360 industrial metal perforated plate technical requirements and test methods (GB/T 19360-2003, ISO 10630.1994, IDT)
3 terminology, symbols
3.1 P --- Pitch basic dimensions;
The basic dimensions of the pitch P1 --- mesh width direction;
The basic dimensions of the pitch P2 --- mesh the longitudinal direction;
--- Basic mesh size;
1 --- basic mesh width dimension;
2 --- length basic mesh size.
3.2 Other terminology, symbols, according to GB/T 15602 requirements.
4 types and parameters
4.1 aperture arrangement pattern according to GB/T 10061 regulations, increase the bevel arrangement pattern shown in Figure 5, Figure 6, the oblique angle α is 19 ° ~ 45 °, bevel angle α
Also by product design may be.
a) an oblong hole. Z-shaped arrangement, as shown in Figure 1.
b) Long hole. U-shaped arrangement, as shown in Figure 2.
c) rectangular hole. Z-shaped arrangement, as shown in Figure 3.
d) rectangular hole. U-shaped arrangement, as shown in Figure 4.
e) long hole bevel Z-shaped arrangement, as shown in Figure 5.
f) rectangular hole bevel Z-shaped arrangement, as shown in Figure 6.
g) hole. Ta-type arrangement, as shown in Figure 7.
h) hole. Tb type arrangement, as shown in Figure 8.
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