GB/T 17617-2018Rule of sampling and inspection for refractory raw materials (English PDF)

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009.

This standard replaces GB/T 17617-1998 "Rule of sampling and inspection for

refractory raw materials".

Compared with GB/T 17617-1998, the main technical changes of this standard are as

follows.

- In the scope of the standard, CANCEL the content related to the sampling of

"amorphous refractory materials"; EXPAND the original single "sampling" to

"sampling inspection" (see Chapter 1);

- REVISE the original terms and definitions; ADD some necessary terms and

definitions (see Chapter 3);

- RETAIN the sampling scheme based on the coefficient of variation as the basis for

sampling, as the sampling method for "bulk refractory raw materials"; MAKE

supplementing and revision of them (see 5.4);

- ADD the relevant provisions for the laboratory to separate the samples for quality

characteristics testing from the original laboratory samples (see 5.7.2);

- ADD the relevant content of product quality assessment based on sample test

results (see 5.9);

- ADD the sampling inspection scheme for packaged particle size graded materials

(see Chapter 6);

- SUPPLEMENT and MODIFY the content of sampling inspection precision

analysis in the original standard text, as a normative appendix of this standard (see

Appendix C);

- DELETE the Appendix "Empirical categories of coefficient of variation of testing

performance of monolithic refractory materials" of the 1998 edition;

- ADD the normative Appendix on empirical estimation of coefficient of variation

of sample quality characteristics of refractory raw materials (see Appendix D);

- RETAIN the Appendix on the method of sample reduction of refractory raw

materials; MAKE necessary revisions (see Appendix E).

This standard modifies and adopts ISO 8656-1.1988 "Refractory products - Sampling

of raw materials and unshaped products - Part 1.Sampling scheme" by redrafting

method. Compared with ISO 8656-1.1988, this standard has more structural

adjustments. Appendix A lists the comparison of chapter and article numbers between

this standard and ISO 8656-1.1988; Appendix B lists the main technical differences

between this standard and ISO 8656-1.1988.

The following editorial modifications have been made for ease of use.

- MODIFY the name of standard.

This standard was proposed by AND shall be under the jurisdiction of the National

Technical Committee for Standardization of Refractory Materials (SAC/TC 193).

The drafting organizations of this standard. Metallurgical Industry Information

Standards Research Institute, Sinosteel Luoyang Refractory Research Institute Co., Ltd.,

MCC Jiao Nai Engineering Technology Co., Ltd., Zhejiang Zili New Materials Co.,

Ltd., Zhengzhou Ruitai Refractory Technology Co., Ltd., Jiangsu Jingxin New

Materials Co., Ltd., MCC Group Building Research Institute Co., Ltd., Wuhan Weilin

Technology Co., Ltd.

1 Scope

This standard specifies the terms and definitions, general principles, sampling

inspection of bulk refractory raw materials, sampling inspection of packaged particle

size graded materials, sampling inspection reports, etc. for sampling inspection of

refractory raw materials.

2 Normative references

The following documents are essential to the application of this document. For the dated

documents, only the versions with the dates indicated are applicable to this document;

for the undated documents, only the latest version (including all the amendments) is

applicable to this standard.

GB/T 6005 Test sieves - Metal wire cloth, perforated metal plate and electroformed

sheet - Nominal sizes of openings

3 Terms and definitions

The terms and definitions, as defined in GB/T 18930, as well as the following terms

and definitions, apply to this document.

When sampling and testing bulk refractory raw materials, all the increments taken

from a part of the inspection batch of products and mixed together, to obtain a

sample to represent the part of the products.

4 General

During sampling, sample preparation, sample transfer and storage, care shall be

taken not to change the test performance of the original state of the material, and to

prevent any change in the properties to be tested. For example, when collecting samples

for moisture detection, the sampler shall be made of non-hygroscopic materials,

meanwhile the sample shall be sealed immediately after collection.

5 Sampling inspection of bulk refractory raw materials

For bulk refractory raw materials that have not been graded, the products of a delivery

batch shall be inspected in batches according to the following conditions.

6 Sampling inspection of packaged particle size graded materials

Packaged refractory raw materials shall be inspected in batches according to the

following requirements.

7 Sampling inspection report

The report shall include the following contents.

Appendix A

(Informative)

Correspondence of chapter and clause numbers between this standard and ISO

8656-1.1988

Appendix B

(Informative)

Technical differences between this standard and ISO 8656-1.1988

Appendix C

Supplement and modify the contents of sampling

inspection precision analysis in the original standard

text, as a normative appendix of this standard

Convenient to use

Appendix D

Add a normative appendix specifically for the empirical

estimation of the coefficient of variation of the quality

characteristics of refractory raw materials

Convenient to use

Appendix E

Delete the original Appendix "Method of taking

increments"; ADD the appendix of the method of

reducing the sample of refractory raw materials

Meet the needs of sampling inspection

of refractory raw materials

Appendix C

(Normative)

Calculation of standard deviation and precision of sampling inspection

When the standard deviation of each process of sampling inspection of a certain quality

characteristic of refractory raw materials is unknown, several batches of the same

products can be sampled and inspected according to the procedures and requirements

set below, to calculate the standard deviation of each process of product sampling

inspection.

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