Standard Guide for Obtaining a Representative Sample of Copper and Copper Alloy in Particulate Form for Analysis

Importancia y uso:

4.1 This guide is intended primarily for the sampling of particulated copper and copper alloy material for compliance with compositional specification requirements. “Granulated chops” commonly refers to wire and cable, but it may also include other forms and applications of copper such as, but not limited to, transformer windings, plumbing tube, radiators, and sheet. This guide also applies to lots of material that are already particulated in the as-received condition, that is, not subjected to mechanical processing such as turnings, shavings, dust, and fines.

4.2 Particles ³/₄ in. and down in their largest dimension are recommended for sampling as “chops” or “particulates” in accordance with this guide. Larger particles may lend themselves to other methods of inspection, including visual, at the discretion of the user.

4.3 As-received particulated material packaging may vary as a function of the shippers’ and receivers’ capabilities. In areas of confinement, gaylord or container boxes are commonly used, but some shipments can be loose and unpackaged that can be dumped onto the floor for inspection.

4.4 Various physical sampling techniques are applicable: for example, shoveling to fill a bucket, or use of a pipe sampler or auger to obtain a core sample, representative of a full height sample of the cross-section of scrap in accordance with Practices B215. Tools described and depicted in Practices B215, and applicable here (but not limited to), include:

4.4.1 Sample or chute splitters;

4.4.2 Slot or tube samplers;

4.4.3 Scoops;

4.4.4 Spinning rifflers.

4.5 Users are encouraged to read Practices B215 Section 5 “Apparatus” for descriptions of equipment that may be applicable to sampling particulated copper material.

4.6 Pneumatic aspirators may also be employed to gather samples, as shown in Fig. 2 below.

4.11 Also as a guide, users should consider sampling no less than once per 5000 lb.

4.12 Users may choose to adapt their container sampling regime up or down depending on the perceived risk of the supply. For example, users may adopt a standard operating procedure that permits a reduced sampling rate or a waiver of testing altogether where the source of material or the process generating the material is known to be dedicated from a sole supplier, material and processing unit. On the other hand, users may choose to increase their sampling regime for any reason, such as when the containers in a load are visibly inconsistent, when the quality assurance practices for a given load cannot be verified (as with brokered loads), or when indicated by the conformance history of a given source.

4.13 The above suggested rate of sampling does not apply to re-testing.

Subcomité:

B05.08

Volúmen:

02.01

Palabras clave:

aspirator; augur; chute splitter; composite sample; cone and quarter; copper; copper alloys; granulated copper chops; granules; gross sample; recycled scrap; sample splitter; spinning riffler; test lot; test sample; tube splitter;