GB/T 14644-2014 PDF English
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 14644-2014 | English | 85 |
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Textiles - Burning Behaviour - Test Determination of Flame Spread Rate
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| GB/T 14644-1993 | English | 279 |
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Textile fabrics. Burning behaviour. The 45 Degree test determination of flame spread rate
| Obsolete |
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GB/T 14644-2014: Textiles - Burning Behaviour - Test Determination of Flame Spread Rate---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT14644-2014
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 59.080.30
W 04
Replacing GB/T 14644-1993
Textiles – Burning Behaviour - 45° Test
Determination of Flame Spread Rate
Issued on. SEPTEMBER 30, 2014
Implemented on. APRIL 1, 2015
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of PRC.
Table of Contents
Foreword... 3
1 Scope... 5
2 Normative References... 5
3 Terms and Definitions... 5
4 Principles... 6
5 Apparatus and Materials... 6
6 Pre-Test... 9
7 Specimen Preparation... 9
8 Instrument Setting... 10
9 Test Procedures... 11
10 Classification... 11
11 Post-Washing Test... 13
12 Test Report... 13
Bibliography... 15
Foreword
This Standard was drafted as per the rules specified in GB/T 1.1-2009.
This Standard replaced GB/T 14644-1993 Fabrics - Burning Behaviour - The 45° Test
Determination of Flame Spread Rate; compared with GB/T 14644-1993, the major
changes are as follows.
--- Modified the scope of the original standard;
--- Deleted “flammability” terminology in the original standard; modified “burning rate”
into “flame spread rate”; added two terms, i.e. “burning time”, and “surface flash”;
--- Added detailed description and requirements of the combustion test chamber (see
5.1.1);
--- Modified the schematic diagram of combustion test chamber in the original standard
(see Figure 1);
---Modified the schematic diagram of specimen clamp, and added the detailed
description and requirements of the specimen clamp (see 5.1.3);
--- Modified the brushing device in the original standard, and the detailed description
of the brushing device; added the technical requirements of the template (see 5.2);
--- Added “pre-test” (see Chapter 6);
--- Modified the specimen dimension into 160mm×50mm (see 7.1);
--- Added “installation” (see 7.3);
--- Modified the Chapter 7 “Flammability Tester Adjustment” in the original standard
into Chapter 8 “Instrument Setting” in this Standard;
--- Added the technical requirements for “when igniting, the flame is vertically affected
on the specimen surface” (see 8.3);
--- Added the technical requirements for “the distance from igniting place to the
specimen bottom edge is 19mm” (see 8.4);
--- Added the requirements for “re-test when bottom-edge igniting is found” to the test
procedures (see 9.2);
--- Deleted Chapter 9 “Record, Calculation and Result Instructions” in the original
standard;
--- Re-wrote the classification of combustibility (see Chapter 10);
--- Added the combustibility requirements for the test specimen after washing (see
Chapter 11).
This Standard was proposed by China National Textile and Apparel Council.
This Standard shall be under the jurisdiction of Basic Branch of National
Technical Committee for Standardization of Textile (SAC/TC 209/SC 1).
Drafting organizations of this Standard. ZhongFang Standard Inspection Certification
Center (Beijing) Co., Ltd..
Chief drafting staffs of this Standard. Xu Lu, and Liu Feifei.
The historical edition replaced by this Standard is as follows.
--- GB/T 14644-1993.
Textiles – Burning Behaviour - 45° Test
Determination of Flame Spread Rate
1 Scope
This Standard specifies using 45° directional surface ignition to determine the test
method and rating of the fabric combustibility.
This Standard is applicable to all types of fabrics and their products.
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) are applicable to this standard.
GB/T 6836 Sewing Threads
GB/T 8629 Textiles - Domestic Washing and Drying Procedures for Textile Testing
3 Terms and Definitions
The following terms and definitions are applicable to this document.
3.1 Raised surface
The fabric surface with piles, for instance, brushed, napped, tufted, flocked, cut-pile or
the like surface.
3.4 Surface flash
In case the basic structure of the materials is not ignited, the flame spreads rapidly on
its surface.
4 Principles
Under the specified condition, the specimen surface shall be ignited at 45° angle,
assess the flame spread rate of the specimen as per the burning time.
5 Apparatus and Materials
5.1 Combustion tester
5.1.1 Combustion test chamber. it is made of heat-and-smoke-resistant materials,
the chamber internal dimension is 370mm×220mm×350mm, the allowable tolerance
is ±10mm.
5.1.2 Specimen holder. it can support and fix the specimen clamp, and tilt it to be 45°
angle; and adjust the relative position with the front of the flame according to the
different thickness of the specimen.
5.1.3 Specimen clamp. it consists of two U-shaped steel plates with thickness of
2.0mm; its inner frame dimension is 152mm×38mm; the specimen is fixed in between
two plates, clamp the two sides. See Figure 2.
5.1.4 Burner. it is made of the No. 41/2 syringe needle.
5.1.5 Gas. butane (chemically pure).
5.2 Brushing device
It is used for preparing the specimen, and consists of underplate, guide rail, sliding
frame, temperate and brush.
5.3 Oven
It shall be equipped with ventilation and temperature control functions, the temperature
inside the oven is 105°C±3°C.
5.4 Dryer.
6 Pre-Test
For the fabric with unknown combustibility shall be pre-tested; so as to determine the
direction and position with the fastest flame spread rate.
7 Specimen Preparation
7.1 Dimension and quantity
The dimension is 160mm×50mm, quantity is 5 blocks.
7.2 Sampling direction
7.3 Installation
7.3.1 Place the lower clamping plate of the specimen clamp onto the sliding frame of
the brushing device; so that the template is within the inner frame of the lower clamping
plate.
7.3.2 Place the specimen on the lower clamping plate, the to-be-burnt side shall be
upward; the direction end of the specimen with fastest flame spread rate shall be
placed on top of the specimen clamp; cover the upper clamping plate of the specimen
clamp, tighten the upper and lower clamping plates with clamp.
7.4 Brushing
Non-raised surface textile needs not to be brushed.
7.5 Drying
Place the specimen clamp equipped with specimen into 105°C±3°C oven horizontally,
take out after 30min±2min; place it into the dryer, cool off no less than 30min. During
the drying and cooling off period, pay attention not to touching the specimen surface.
8 Instrument Setting
8.1 The general room temperature condition can be adopted; however, test shall be
performed under the condition without wind.
8.2 Place the specimen clamp equipped with specimen onto the specimen holder,
adjust the latter, so that the distance from the burner top to the specimen surface is
8mm.
8.4 The distance from the specimen surface to the marker line of the ignition place is
127mm. The ignition place is 19mm away from the bottom-edge of the specimen. See
Figure 2.
9 Test Procedures
9.1 Take out a specimen clamp equipped with specimen from the dryer, place it onto
the specimen holder of the combustion test chamber; pass the marker line through the
guide wire hook on the plate of specimen holder;
9.2 Ignite the burner, so that the flame contact with specimen surface for 1s±0.05s;
meanwhile, start the timer. When the flame burns to the marker line, the heavy hammer
dropped due to the breakage of the line, the timer stops timing. Re-test if the bottom-
edge is ignited.
9.3 Observe the burning status of the specimen, record the burning time and burning
status indicated by the timer.
9.4 Each time after the completion of the test, open the fan and discharge the flue
gas generated during the test; the fan shall be closed before test the next specimen.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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