Skip to product information
1 of 10

PayPal, credit cards. Download editable-PDF and invoice in 1 second!

GB/T 38470-2019 English PDF (GBT38470-2019)

GB/T 38470-2019 English PDF (GBT38470-2019)

Regular price $325.00 USD
Regular price Sale price $325.00 USD
Sale Sold out
Shipping calculated at checkout.
Quotation: In 1-minute, 24-hr self-service. Click here GB/T 38470-2019 to get it for Purchase Approval, Bank TT...

GB/T 38470-2019: Recycling materials for brass

This Standard specifies the classification, technical requirements, test methods, inspection rules, marking, packaging, transportation, storage, quality certificate and order form (or contract) content of recycling materials for brass. This Standard applies to brass materials and their recycling and domestic and foreign trade in the field of circulation.
GB/T 38470-2019
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 77.150.30
H 62
Recycling materials for brass
ISSUED ON: DECEMBER 31, 2019
IMPLEMENTED ON: JULY 01, 2020
Issued by: State Administration for Market Regulation;
Standardization Administration of the PRC.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Terms and definitions ... 4
4 Classification ... 7
5 Technical requirements ... 7
6 Test methods ... 11
7 Inspection rules ... 14
8 Marking, packaging, transportation, storage and quality certificate ... 16 9 Order form (or contract) content ... 17
Appendix A (Informative) Typical photos of recycling materials for brass ... 18 Appendix B (Informative) Inspection methods of radioactive contaminants ... 22 Appendix C (Normative) Testing method of moisture content ... 28
Appendix D (Normative) Preparation of chemical composition sample and
testing method of metal recycling rate ... 30
Appendix E (Informative) Inspection process of recycling materials for brass 32 Bibliography ... 33
Recycling materials for brass
1 Scope
This Standard specifies the classification, technical requirements, test methods, inspection rules, marking, packaging, transportation, storage, quality certificate and order form (or contract) content of recycling materials for brass (hereinafter referred to as materials).
This Standard applies to brass materials and their recycling and domestic and foreign trade in the field of circulation.
2 Normative references
The following documents are indispensable for the application of this document. For the dated references, only the editions with the dates indicated are applicable to this document. For the undated references, the latest edition (including all the amendments) are applicable to this document.
GB/T 5121 (all parts) Methods for chemical analysis of copper and copper alloys
GB/T 6682 Water for analytical laboratory use - Specification and test
methods
GB/T 8170 Rules of rounding off for numerical values and expression and
judgement of limiting values
YS/T 482 Methods for analysis of copper and copper alloys - The atomic
emission spectrometry
YS/T 483 Methods for analysis of copper and copper alloys - X-Ray
fluorescence spectrometric (wavelength dispersive)
3 Terms and definitions
The following terms and definitions apply to this document.
3.1
Recycling materials for brass
material is 0.5 kg; the mass of moisture is 0.2 kg; the mass of non-copper metals such as aluminum and iron is 2 kg; the mass of copper and copper alloy is 97.3 kg; then the metal brass content is 97.3%.
3.7
Total metal content
The amount of metal (including metal brass and non-copper metal) per unit mass of representative sample after removal of foreign material and moisture, expressed as a percentage.
Note: For example, extract 100 kg of representative sample; of which, the mass of foreign material is 0.5 kg; the mass of moisture is 0.2 kg; the mass of non-copper metals such as aluminum and iron is 2 kg; the mass of copper and copper alloy is 97.3 kg; then the total metal content is 99.3%.
3.8
Coating material
The material coated on the surface of the materials.
Note: Coating material generally includes identification paint, anti-rust paint, insulating layer, etc.
3.9
Plating material
The material plated on the surface of the materials.
Note: Plating material generally includes nickel, tin, zinc, aluminum, chromium, etc. 3.10
Chemical composition sample
The sample which is directly extracted from the materials or prepared after melting for detecting the content of copper and other elements.
3.11
Metal recycling rate
The ratio OF the mass of the ingot, obtained after pretreatment, melting and solidification of a unit mass of representative sample, TO the mass of the original representative sample, expressed as a percentage.
The inspection of metal recycling rate of the materials shall be carried out in accordance with Appendix D.
6.8 Other requirements
Other requirements of the materials are inspected by sensory organs.
7 Inspection rules
7.1 Inspection process
Refer to Appendix E for the inspection process of the materials.
7.2 Inspection and acceptance
The purchaser shall inspect the received materials in accordance with the provisions of this Standard. If the inspection result is not in conformity with the provisions of this Standard and the order form (or contract), it shall be submitted to the supplier in written form; the supplier and the purchaser shall negotiate and resolve. If arbitration is required, it shall be negotiated between the supplier and the purchaser.
7.3 Lot grouping
The materials shall, in lots, be submitted for acceptance. Each lot shall be composed of the materials with the same name or code. The lot weight shall not exceed 50 t.
7.4 Inspection items
The apparent characteristics, radioactive contaminants, foreign material content, moisture content, total metal content, and metal brass content of each lot of the materials shall be inspected. When necessary, the chemical
composition and metal recycling rate shall also be inspected.
7.5 Sampling
The sampling of the materials shall meet the requirements of Table 5.
materials does not meet the requirements of this Standard.
8 Marking, packaging, transportation, storage and
quality certificate
8.1 Marking
Each lot of the materials shall be accompanied by a label indicating:
a) Supplier name;
b) Material name;
c) Material code;
d) Lot number;
e) Total weight;
f) Net weight;
g) Number of this Standard;
h) Others.
8.2 Packaging
The materials can be packaged in bulk, packaged, or pressed, etc. The
packaging method, size and mass shall be negotiated and determined by both the supplier and the purchaser.
8.3 Transportation and storage
8.3.1 During transportation, different categories of bulk materials shall not be mixed.
8.3.2 The transportation and storage of the materials shall be protected from rain and snow.
8.4 Quality certificate
Each lot of the materials shall be accompanied by a quality certificate, which indicates:
a) Supplier name;
Appendix B
(Informative)
Inspection methods of radioactive contaminants
B.1 Inspection instrument
The inspection instrument shall meet the requirements of GB 18871, GB/T 12162.3 and GB/T 5202.
B.2 Measurement of external irradiation penetrating radiation dose rate B.2.1 Measurement of natural environmental radiation background value
B.2.1.1 Before the measurement of external irradiation penetrating radiation dose rate, the local natural environmental radiation background value shall be measured and determined first.
B.2.1.2 Choose 3~5 points (which can be used as fixed survey points) on the flat open ground, which can represent the local normal natural radiation background state and have no radioactive contamination, as the measuring points.
B.2.1.3 PLACE the measuring probe of the measuring instrument at a height of 1 m from the ground above the measuring point; determine its external
irradiation penetrating radiation dose rate. The measured value is read once every 10 s. The average of the 10 readings is taken as the measured value at this point. USE the arithmetic mean of the measured values of each measuring point as the average of normal natural radiation.
B.2.2 Tour testing
B.2.2.1 Before the materials pass through the port channel, they shall be subjected to the tour testing of radioactive contamination. During the tour testing, the measuring instrument shall be as close as possible to the surface of the measured object or the surface of the container, car body, warehouse body, etc. loaded with the materials. The peripheral surface of the measured object shall be tour-tested.
B.2.2.2 During the tour testing, when it is found that the radioactivity has obviously exceeded the management limits of three detection indicators, it is judged as nonconformity. When the radioactive contamination has been found to exceed the management limits of three detection indicators, no sub-
D??? - The corrected measured value of the measuring instrument, in microGy per hour (??Gy/h);
K1 - The scale factor of measuring instrument (given by the instrument's verification certificate);
K?? - The efficiency factor of measuring instrument; D??? c - The measured value reading of measuring instrument, in microGy per hour (??Gy/h).
B.3 Inspection of ??, ?? surface contamination
B.3.1 Testing requirements
In general, the tour testing and point measurement of ?? and ?? surface
contamination level shall be carried out at the same time as the measurement of external irradiation penetrating radiation dose rate. If necessary, the tour testing and point measurement of this item can also be carried out separately. B.3.2 Arrangement of test points
For the detection of ?? and ?? surface contamination levels, the test points shall be arranged in accordance with B.2.3. The measurement area shall be greater than 300 cm2.
B.3.3 Efficiency determination of ?? surface contamination meter
B.3.3.1 USE ?? surface contamination meter to measure the count N0,?? of the natural environmental radiation background 10 min.
B.3.3.2 Measure the check source of the instrument for 5 min and obtain the count N1,??.
B.3.3.3 Reverse the instrument probe by 180?? and measure it for 5 min, to obtain the count N2,?? of the check source (considering the unevenness of the plane source).
B.3.3.4 According to formula (B.3), calculate the efficiency factor ??4?€(??) of the instrument.
Where:
??4?€(??) - The efficiency factor of ?? surface radiation contamination meter; Appendix C
(Normative)
Testing method of moisture content
C.1 Scope
This appendix specifies the testing method for the moisture content of the materials.
This appendix applies to the testing of the moisture content of the materials. C.2 Method summary
USE alcohol and clear water to clean the sample; HEAT to a fixed temperature and keep to a constant weight. The mass loss is measured, to calculate the moisture content.
C.3 Reagents or materials
C.3.1 Industrial alcohol; the mass fraction of ethanol is not less than 95%. C.3.2 Water: Grade 2 water specified in GB/T 6682.
C.4 Apparatus
C.4.1 Drying oven: The temperature control range is 105 ??C??5 ??C.
C.4.2 Drying disc.
C.4.3 Electronic scale: The accuracy is 0.01 g.
C.5 Sampling
In each inspection lot, take 2 representative samples of the materials. The mass of each representative sample is not less than 1.0 kg.
C.6 Test procedure
C.6.1 After the drying disc has a constant weight at 105 ??C, it is placed in a drying oven and cooled to room temperature. The mass is weighed and
recorded as m6.
C.6.2 PUT the representative sample into the drying disc and spread it flat; WEIGH the mass of the drying disc with the sample and record it as m7.
Appendix D
(Normative)
Preparation of chemical composition sample and testing method of
metal recycling rate
D.1 Scope
This appendix specifies the preparation method of chemical composition
sample and the testing method of material metal recycling rate.
This appendix applies to the preparation of chemical composition sample and testing of metal recycling rate.
D.2 Method summary
TAKE representative samples of the materials; after pretreatment, put them into the melting furnace; fully melt and clear the slag; prepare chemical composition samples. After the melt is solidified, the ratio of the mass of the obtained ingot to the mass of the sample is the metal recycling rate.
D.3 Reagents or materials
Melting covering agents and slag cleaning agents (such as charcoal, salt, borax, etc.).
D.4 Apparatus
D.4.1 Melting electric furnace.
D.4.2 Crucible; preferably a graphite crucible.
D.4.3 Mold.
D.4.4 Electronic scale: Accuracy is 0.01 kg.
D.5 Test procedure
D.5.1 Sampling
In each inspection lot, take representative samples. The mass is not less than 10 kg.
D.5.2 Weighing

View full details