Gb T 2007 2 1987 Translated English Of Chinese Standard Gbt 2007 2 1987 Gb T2007 2 1987 Gbt2007 2 1987

This General Rules applies to the preparation of samples taken according to the method specified in GB 2007.1. The prepared sample shall be representative of the quality characteristics of the original sample and suitable for analysis or test requirements.

This Standard is applicable to the determination of the grain-sizes of various minerals specified in GB 2007.1.

This General Rule is applicable to the selection of samples for the inspection the chemical composition, water content, particle size and other physical items of batches of fluorspar (i.e., fluorite), alumina, talc, manganese ore, iron ore, chromium ore in bulk. Other bulk mineral products such as: barite, magnesia, feldspar, clay, plaster, limestone, dolomite, magnesite, etc. can also be implemented by reference. When formulating a manual sampling method standard for a particular bulk mineral product, this general rule should be used as a guiding document.

This standard applies to the determination of moisture content of ore described in GB 2007.1. However, it does not apply to some easily oxidized sulfide ore.

This standard applies to the determination of the amount of nickel in cast iron, carbon steel, and low alloy steel. Measuring range is 0. 005% ~ 0. 50%. This standard follows the requirements GB 1467-78 Method for chemical analysis of metallurgy product - General rules and regulations.

This standard applies to the determination of the amount of manganese in pig iron, carbon steel, alloy steel, and iron powder. Measuring range is 0. 10% ~ 2. 50%. This standard follows the requirements GB 1467-78 Method for chemical analysis of metallurgy product - General rules and regulations.

This Standard specifies normal type single coil spring lock washers with a specification of 2~48mm.

This part specifies the terms and test methods for bias and precision checking. This part is applicable to the checking of the precision of the sampling and sample preparation methods listed in GB/T 2007.1 and GB/T 2007.2, as well as the bias checking test of sampling methods and sampling devices that need to be checked. It can also be used for checking the bias of the sample preparation method and reduction device.