GB/T 2294-2019Determination of softening point in solid products of coal carbonization (English PDF)

Foreword

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

This standard replaces GB/T 2294-1997 "Method for determination of softening point of coking solid products", this standard is in accordance with GB/T 2294-1997 The main technical changes are as follows.

--- Modified the sample tool (see 3.3.1.4, 1997. 3.3.1.3);

--- Added the sample operation control table (see 3.3.3);

--- Increased cryostat (see 4.2.1.8);

--- Added the main technical parameters of the automatic ring and ball softening point tester (see 4.2.1.9);

--- Modified the reagents, and changed "Vaseline" and "glycerol" to "glycerol" (see 4.2.2, 5.2 of 1997 edition);

--- Increased the requirements for the preparation of copper rings for samples (see 4.3.1.4);

--- Increase the requirement for softening drooping distance measurement of the sample in the universal method (see 4.3.1.5);

--- Increase the requirements for ball weighing in the Global Method (see 4.3.1.6);

--- Change the 1 °C in the "Re-testing of the softening point of the two rings to more than 1 °C" to 0.8 °C (see 4.3.1.9, 1997 edition) 6.6);

--- Increased the calculation formula for the manual analysis of the global method (see 4.3.1.10);

--- Added the global method of automatic instrumentation (see 4.3.2);

--- Modified the test table for different softening point test (see 4.3.3, 6.7 of 1997 edition);

--- Global law reproducibility adjusted from 1.5 ° C to 1.2 ° C (see 4.4.1, 1997 version of 7.1);

--- Purity of benzoic acid changed to reference reagent (see 5.2.2.1, 9.2.1 of 1997 edition);

--- Modified the reagent, changed "xylene or washing oil" to "xylene" and modified the purity (see 5.2.2.2, 1997 version 9.2.2);

--- Modified the reagents and changed "Vaseline" to "glycerol" (see 5.2.2.3, 1997 version 9.2.3);

--- Increased the requirements for periodic calibration of the ball ball meter (see 5.4.10);

--- Revised the content of the test results (see Chapter 6, Chapter 12 of the 1997 edition).

1 Scope

This standard specifies the principle, instrument, test procedure and test for the determination of softening point of coking solid product coal tar pitch and solid coumarone resin. Test results, allowable deviations, test reports and arbitration.

This standard is applicable to the determination of the softening point of coking solid products coal pitch and solid coumarone resin.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this document. For undated references, the latest edition (including all amendments) applies to this document.

GB/T 2000 coking solid product sampling method

Method for preparing GB/T 2291 coal pitch laboratory sample

3 Sample taking and preparation