GB/T 5208-2008Determination of flash point -- Rapid equilibrium closed cup method (English PDF)

Foreword

This Standard equivalently adopts ISO 3679:2004 Determination of Flash Point – Rapid

Equilibrium Closed Cup Method (English Version).

This Standard replaced GB/T 5208-1985 Coatings - Flash Point Test - Rapid Equilibrium

Method, and GB/T 7634-1987 Petroleum and Related Products - Determination of Lower

Flashpoint - Rapid Equilibrium Method.

The major technical differences between this Standard and GB/T 5208-1985 & GB/T 7634-

1987 are as follows:

---This standard combines the contents of the two standards; and its applicable products and

test flash point range are wider than the original standard;

--- The original two standards refer to ISO 1523:1983 and ISO 3679:1983;

--- Add calibration method of the instrument;

--- Add the technical requirements for the thermometer used for testing;

--- Add the method of using the embedded cup;

--- Add the relevant content of testing samples with a flash point greater than 100 °C;

--- The expression of precision is different;

--- Describe the operating procedures respectively according to the flash point no greater

than 100°C and greater than 100°C;

--- Give the requirements for flash point testing equipment in Annex A.

This Standard's Annexes A and B are normative, while Annexes C and D are informative.

This Standard was proposed by China Petroleum and Chemical Industry Association.

This Standard shall be under the jurisdiction of National Technical Committee on Paints &

Pigments of Standardization Administration of China (SAC/TC 5).

Drafting organization of this Standard: CNOOC Changzhou Paint & Coating industry Research

Institute.

Chief drafting staff of this Standard: Feng Shifang.

GB/T 5208 was first-time published in 1985; GB/T 7634 was first-time published in 1987; it is

thee first-time combined and revised hereby.

Determination of Flash Point – Rapid Equilibrium Closed

Cup Method

1 Scope

This Standard specifies a method for the determination of the closed cup flash point of paints

(including water-borne paints), varnishes, paint binders, adhesives, solvents, petroleum, and

related products having closed cup flash points within the range of -30°C ~ 300°C. When used

in conjunction with the flash detector (A.1.6), this Standard is also suitable for the

determination of the flash point of fatty acid methyl esters (FAME).

2 Normative References

The provisions in following documents become the provisions of this Standard through

reference in this Standard. For dated references, the subsequent amendments (excluding

corrigendum) or revisions do not apply to this Standard, however, parties who reach an

agreement based on this Standard are encouraged to study if the latest versions of these

documents are applicable. For undated references, the latest edition of the referenced document

applies.

GB/T 3186 Paints Varnishes and Raw Materials for Paints and Varnishes - Sampling (GB/T

3186-2006, ISO 15528:2000, IDT)

GB/T 20777 Paints and Varnishes - Examination and Preparation of Samples for Testing

(GB/T 20777-2006, ISO 1513:1992, IDT)

SY/T 5317 Petroleum Liquid - Automatic Pipeline Sampling (SY/T 5317-2006, ISO

3171:1988, IDT)

ISO 3170 Petroleum Liquids – Manual Sampling

3 Terms and Definitions

For the purposes of this Document, the following terms and definitions apply.