GB/T 40244-2021Chemicals—Liquid or solid identification—Fluidity test method (English PDF)
化学品 固液鉴别 流动性测定法
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
May 21, 2021
Implementation date
December 1, 2021
Scope
GB/T 40244-2021 is the English-translated version of 化学品 固液鉴别 流动性测定法.
GB/T 40244-2021 gives a fluidity test for deciding whether a chemical is a liquid or a solid when it is viscous or pasty and its melting point cannot be determined.
The sample is sealed in a sample cup, stood upright for more than 30 minutes and held at 35.0 °C ± 0.5 °C, then a fluidity tester measures how deep a duralumin sieve tray with tapered holes penetrates it; the form of the chemical follows from the test time and the penetration depth.
The document defines flow point and penetration depth, describes the tester and its parts, the explosion-proof oven and the scraper, and covers sample treatment, the test procedure and the judgment of results. It was issued on 21 May 2021 and has applied since 1 December 2021.
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Document preview — GB/T 40244-2021
National Standard of the People's Republic of China
- ICS
- 71.040.50
- Classification
- G 04
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Foreword3
- Introduction4
- 1 Scope5
- 2 Normative references5
- 3 Terms and definitions5
- 4 Test overview5
- 5 Test equipment6
- 6 Sample treatment7
- 7 Test procedure7
- 8 Result judgment8
- Appendix A (Informative) Schematic diagram of fluidity tester9
1 Scope
This document specifies the test overview, test equipment, sample processing, test steps, and results determination for the fluidity test method of liquid or solid identification of chemicals.
This document applies to the liquid or solid identification of viscous or pasty chemicals whose melting point cannot be determined.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
The following terms and definitions are applicable to this document.
3.1 Flow point
The minimum temperature at which a sample can flow when it is cooled under specified conditions.
3.2 Penetration depth
The depth that the duralumin sieve tray penetrates the sample vertically at the lowest point, under specified conditions,
Note: Expressed in millimeters (mm).
4 Test overview
Place the sample in the sample cup and seal it. Place it upright for more than 30 minutes; keep the constant temperature to 35.0 °C ± 0.5 °C; then, immediately put the sample cup on the fluidity tester to measure the penetration depth. Determine the chemical solid-liquid form according to the test time and penetration depth.
5 Test equipment
5.1 Liquidity tester
Main components of the liquidity tester (see Appendix A for schematic diagram) include.
a) Guide rod: A guide rod that is composed of a rigid rod, which has a "step" at the upper end and a suitable structure for connecting a duralumin sieve tray with a tapered hole at the lower end. The appearance shall be polished to be smooth. The mass is 47.50 g ± 0.05 g; the dimensions and tolerances are shown in Figure 1.
b) Duralumin sieve tray with tapered holes: the mass is 102.50 g ± 0.05 g; the dimensions and tolerances are shown in Figure 1.
c) Sample cup: the inner diameter is 72 mm ~ 80 mm.
d) Time controller: the accuracy is ±0.1 s.
e) Vernier caliper: the graduation value is ±0.1 mm.
5.2 Explosion-proof oven
The accuracy is ±0.5 °C; it can maintain a constant temperature of 35.0 °C ± 0.5 °C.
5.3 Scraper
A corrosion-resistant square-headed hard blade whose width is about 20 mm and length is not less than 150 mm. […]
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Referenced standards
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