GB/T 26022-2010Sampling of refined nickel (English PDF)

Foreword

This Standard was drafted in accordance with the rules provided in GB/T 1.1-2009.

This Standard modifies and adopts ISO 7156:1991 Refined Nickel - Sampling. In comparison

with the international standard, this Standard has the following main changes:

---The contents of arbitration sampling and production batch sampling are added to

"Scope";

---The expressions of terms, definitions and clauses are modified in accordance with the

habits of Chinese language, for example, using "%" instead of "g/t" to express standard

deviations;

---The product form provided, "a thickness of 6 mm ~ 12 mm" and "a weight of about 50

kg", is modified into "a thickness of 3 mm ~ 15 mm" and "a weight of about 50 kg ~

70 kg" in accordance with the current situation of domestic product production;

---For the sample selection in the units of 50 kg, 250 kg and 1,000 kg, the corresponding

batch weight, total number of units, number of initial increments, number of secondary

increments in each initial increment and total number of secondary increments are

accordingly adjusted in accordance with the same principle. See the corresponding

relations in Appendix C for details;

---For the "sampling of barrels that do not require machining", it is required to "take a

secondary increment from each barrel using a sample shovel or a suitable tube-type

sampler within the entire barrel";

---The variation range of S1 and S2 within 0.0002% is added to Appendix A "Examples of

Se Values".

This Standard shall be under the jurisdiction of National Technical Committee 243 on

Nonferrous Metals of Standardization Administration of China (SAC/TC 243).

The drafting organizations of this Standard: Jinchuan Group Co., Ltd.; China Nonferrous

Metals Industry Standards, Metrology and Quality Research Institute.

1 Scope

This Standard specifies the sampling procedures for refined nickel less than 25 t, with the same

composition, specifications and shape and manufactured under the same production conditions.

This Standard applies to arbitration sampling of refined nickel and can also be used for

production batch sampling.

2 Normative References

The contents of the following documents constitute indispensable clauses of this document

through the normative references in the text. In terms of references with a specified date, only

versions with a specified date are applicable to this document. In terms of references without a

specified date, the latest version (including all the modifications) is applicable to this document.

ISO 7156:1991 Sampling of Refined Nickel

ISO 4957 Tool Steel

3 Products Provided

Refined nickel is usually delivered in the following forms:

---Most of them are whole cathode plates with a thickness of 3 mm ~ 15 mm and a weight

of about 50 kg ~ 70 kg;

---Metal in barrels. The metal can be in the form of cathode plate slices (usually blocks

with sides of 25 mm, 50 mm and 100 mm), cakes, pellets, beads, small particles or

powder. Packaging specifications: 50 kg, 250 kg and 1,000 kg.

4 Sampling