GB/T 2547-2026Plastics — Sampling methods (English PDF)

Foreword

This document conforms to GB/T 1.1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents".

This document replaces GB/T 2547-2008 "Sampling Methods for Plastics". Compared with GB/T 2547-2008, the only changes are structural adjustments and editing.

Aside from the gender changes, the main technical changes are as follows.

a) The scope of application has been expanded (see Chapter 1);

b) A sampling procedure has been added (see Chapter 4);

c) The sample size has been changed (see 7.1, 4.2 in the 2008 edition).

d) Added sampling by opening the bag (see 7.2);

e) A sampling report has been added (see Chapter 8).

1 Scope

This document specifies the sampling procedure for plastic sampling, the determination of sample size, sample extraction, sampling, and sampling report.

This document applies to the sampling of homogeneous solid plastics.

2 Normative references

This document has no normative references.

3 Terms and Definitions

This document does not contain any terms or definitions that need to be defined.

4 Sampling Procedure

The plastic sampling procedure is as follows.

a) Clearly define the scope of the overall product, such as a specific delivery batch agreed upon by the buyer and seller, a production batch with intermittent production, or a batch with continuous production. Production materials, etc., inside the compartment;

b) Determine the historical data for the overall product and identify the standard deviation or coefficient of variation of the product;

c) Determine the sample size and sample quantity;

e) Determine the sampling method;

f) Complete the sampling according to the determined sampling method and sampling procedure;

g) Generate a sampling report.

5 Determining the sample size