Oxygen Index Test Apparatus

What is the oxygen index equipment?

Oxygen Index Test Apparatus is an experimental device used to evaluate the combustion performance of materials under controlled conditions.

Purpose:

The primary function of an oxygen index tester is to identify the combustion properties of materials under specific concentrations of oxygen, with a particular focus on the self-ignition features of those materials. This test helps in assessing the fire risk of materials and provides guidance for material selection and design in the construction and engineering sectors.

structure:

Oxygen index tester usually consists of the following parts:

1.Test Chamber:A closed testing space used to place the materials to be tested and control the gas composition.

2.Oxygen Control System:used to adjust the oxygen concentration in the test chamber to simulate different combustion conditions.

3.Ignition System:used to ignite the material to be tested and start the combustion process.

4.Gas Analysis System:Gas composition during combustion is monitored for carbon dioxide, carbon monoxide and other products.

Testing process:

1.Preparation: Place the material to be tested in the test chamber and ensure that the oxygen concentration in the test chamber is controllable.

2.Ignition: Start the ignition system, ignite the material to be tested, and observe and record its combustion characteristics.

3.Oxygen index measurement: During the test, by adjusting the oxygen control system, the minimum oxygen concentration required for material combustion is determined, that is, the oxygen index.

Test parameters:

The main parameters considered by the oxygen index tester include:

Oxygen Index (OI):The minimum oxygen concentration required for material combustion, usually expressed as a percentage.

Combustion characteristics: including ignition time, burning rate, heat release rate, etc., used to evaluate the combustion performance of materials.

application:

Oxygen index testers are widely used in construction, aerospace, electronics, chemical industry and other fields to evaluate the flame retardant performance and fire safety of materials.

Standards and Specifications:

Oxygen index testing methods are often included in various international and industry standards, such as ASTM D2863, ISO 4589, etc. These standards specify requirements for testing procedures, oxygen concentration, sample size, etc.

Advantage:

Oxygen index tester has the following advantages:

Intuitive evaluation index: The oxygen index directly reflects the self-ignition property of the material and is an important parameter for evaluating the fire hazard of the material.

Highly controllable test conditions: The oxygen concentration in the test chamber is adjustable, which can simulate different combustion environments and provide accurate test data.

Please find below the detailed testing method for Oxygen Index Tester

1.Compliant standards:

1.1 Comply with GB/T2406.2-2009 "Plastics—Determination of flammability by oxygen index" and JIS7201, BS2782, ANSI/ASTM, D2863, ISO4589-2:1996 test standards.

2. Scope of application:

2.1 It's applicable to strip or sheet materials with sample thickness less than 10.5mm that can self-supporting upright, and also suitable for homogeneous solid materials, laminates, foam materials, soft sheets and film materials with apparent density greater than 100kg/m³ and some foam materials with an apparent density of less than 100 kg/m³, and a test method for sheet-like materials or films that can be self-supporting upright is provided for judging the ease of combustion of materials in contact with flame in air.

3. Main parameters:

3.1 Oxygen concentration (oxygen index): direct reading by digital display. Resolution: 0.1%.

3.2 Air supply pipeline: flow meter, pressure gauge and needle valve.

3.3 Combustion cylinder: Quartz glass cylinder, inner diameter: 75mm, height: 450mm

3.4 Ignition: dedicated propane hand-held electronic electric firearm. Using a copper tube with a diameter of 2.0mm, the flame can be adjusted to spray 16mm±4mm vertically downward from the outlet.

3.5 Glass beads: φ4.5mm, filling height 95mm

3.6 Specimen clamps: one set of hard self-supporting material and one set of soft material clamp

3.7 Gas source: Oxygen and nitrogen with a purity of more than 98% (provided by the buyer)

3.8 Power requirements: AC220 (±10%) V/50HZ.

3.9 Dimensions: L630*W350*H655 (unit: mm)

4. Box structure

4.1 The design of the instrument is reasonable and the operation is convenient. The test system uses imported oxygen sensors and uses numbers to display results. It has the advantages of accurate judgment and good reproducibility. It is an ideal testing equipment for scientific research and production quality control.

4.2 Control box: Machining with CNC machine tools, beautiful and elegant arc shapes. High-quality paint materials, beautiful, rust-proof and anti-corrosion.

4.3 Burning Tube: It consists of a high-temperature and high-quality glass tube fixed on the base and imported a hybrid gase of oxygen-containing gas. Its size is inner diameter φ75mm, 450mm long, and exit inner diameter is φ40mm.

4.4 Mixer: It is installed on the base of the burning tube to make the entering mixed gas distributed evenly. It uses high -temperature and high -quality glass beads to fill in the form of oxygen and nitrogen evenly. (Glass bead φ4.5mm, filling height of 95mm)

4.5 Sample clamping: It is used to support the sample vertically in the center of the burning tube. It can be used for soft and hard plastic. Self -supporting fixture can clamp the sample vertically. The fixture and supporting borders are smooth, making the ascending air flow suffered from the minimum interference. Inner frame size: 140mm × 38mm.

5. Electric control system:

5.1 The relay control system is adopted, and all electronics use the leading brand at home and abroad, which can better ensure the performance and detection accuracy of the machine.

5.2 Equipment has the following safety protection devices: power overload, short-circuit protection, and control circuit overload protection.

FAQ：

Q: What's the material of machine?

A: Cast iron, stainless steel

Q: Do you accept customization service?

A: Yes, we accept non-standard customized testing apparatus.

Q: What's the production time?

A: In general, the delivery time will be about 45-55 working days after deposit receipt. If you're in urgent need, we could try to produce your order in advance.

Q: What's the warranty and after sales service?

A: Our warranty is one year. Within warranty, after sales service is for free. For after sales service, we will dispatch our engineer for commissioning at customer's place. The air tickets and accommodations are covered by our customer. Besides, we

offer commissioning by video guidance.

Q: What's the Packaging?

A: Usually, all the machines are packed by wooden case. For small machines and components, it is packed by carton.

Q: What's the payment term?

A: T/T, L/C and other payment terms could be negotiated.