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Shenzhen Northtest Testing Technology Co., Ltd. Northtest group Third party certification body

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Hot Line 400-800-6106
Northtest group · headquarters
Tel:0755-36995505 Q Q: Email:ntek@ntek.org.cn Blocks B, C and E of Fenda Science and Technology Creative Park, Xixiang, Baoan District, Shenzhen

Testing of refractory materials

Basic introduction

Beitest Testing integrates the resources of the entire industry, testing products including refractory materials, fireproof materials, flame retardant materials, heat insulation materials, and fireproof coating testing. The focus is on fire resistance, combustion performance, flame retardant rating, fire rating, smoke oxygen index, etc. The project provides authoritative third-party CMA / CNAS qualification test reports in accordance with domestic and foreign testing standards.

Testing services

Common refractory testing
Graphite, silicon brick, clay brick, AZS brick, corundum brick, direct bonded magnesia-chrome brick, silicon carbide brick, silicon nitride bonded silicon carbide brick, nitride, silicide, sulfide, boride, carbide and other non-oxides Refractory materials; calcium oxide, chromium oxide, aluminum oxide, magnesium oxide, beryllium oxide, diatomite products, asbestos products, insulation boards, filling materials, ramming materials, castables, plastics, refractory mud, refractory spray repair and so on.
Flame retardant material testing
Flame retardant fabric, flame retardant chemical fiber, flame retardant plastic, flame retardant rubber, fire retardant coating, flame retardant wood material and paper, inorganic non-combustible filling material, flammability, non-combustibility, flame retardant, solid phase flame retardant Gas phase flame retardant, physical effect flame retardant, etc.
Fire coating testing
Fireproof coatings for facing, fireproof coatings for steel structures, fireproof coatings for wood, fireproof coatings for concrete structures, fireproof coatings for tunnels, fireproof coatings for cables, fireproof coatings for buildings, etc.
Fire testing of building materials
Testing of various types of fire-resistant building components, fire resistance limit, material toxicity toxicity classification of building materials, non-combustibility of building materials, smoke density grade, flammability of building materials, classification of burning performance of building materials and products, fire performance, etc.
Automotive and rail fire resistance test
The combustion characteristics of automotive interior materials are tested in accordance with "GB 8410"; the fire retardancy test of rail transit is based on TB / T 3138 technical requirements for locomotive and vehicle flame retardant materials, and TB / T 3237 technical requirements for flame retardant materials for automotive interior materials.
Fire testing of furniture upholstery
Burning grade (A1, A2, B1, B2), curtains / curtains, wood flooring / carpets / plastic / rubber flooring / floor / artificial stone, flooring materials, upholstered furniture and components, etc.

Test items

Structural performance: porosity, bulk density, water absorption, air permeability, pore size distribution, etc.
Thermal performance: thermal conductivity, coefficient of thermal expansion, specific heat, heat capacity, thermal conductivity, thermal emissivity, etc.
Mechanical properties: compressive strength, tensile strength, flexural strength, torsional strength, shear strength, impact strength, abrasion resistance, creep, bond strength, elastic modulus, etc.
Performance: fire resistance, load softening temperature, reburning line change, thermal shock resistance, slag resistance, acid resistance, alkali resistance, hydration resistance, CO corrosion resistance, electrical conductivity, oxidation resistance, etc.
Fireproof coating testing items: fire resistance limit, fire resistance time, condition, fineness, drying time, adhesion, flexibility, impact resistance, water resistance, damp heat resistance and flame resistance time, coating adhesion, impact resistance, water resistance , Moisture and heat resistance, flame resistance, appearance and color, state in the container, drying time, initial dry crack resistance, water resistance, dry density, acid or alkali resistance (except additional fire resistance), bond strength, resistance Compressive strength, cold and hot cycle resistance, fire resistance, heat resistance, humidity and heat resistance, freeze-thaw cycle resistance, salt spray corrosion resistance
Testing of flame retardant materials: safety monitoring, environmental protection testing, energy saving testing, fire resistance limit, flame resistance, ignition, nonflammability, flammability, smoke production density, smoke production toxicity, flame resistance test, combustion characteristics, heat release and smoke Gas, fire resistance, burning performance, burning heat value, fire resistance, high temperature resistance, fire rating test, etc.
At present, the mainstream flame retardant materials mainly pass the following points:
1. Ignition and flammability, that is, how easy it is to be ignited; 2. Flame propagation speed, that is, the speed of flame propagation along the material surface; 3. Fire resistance, that is, the speed at which fire penetrates material components; 4. Release speed (HRR), that is, the amount of heat and speed emitted when the material burns; 5. The ease of self-extinguishing; 6. Smoke generation, including the amount of smoke, the rate of smoke release, and the composition of the smoke; 7. Classification of combustion performance : Seven levels: A1, A2, B, C, D, E, F, etc.

Testing standards

GB / T 2997 Dense shaped refractory products-Determination of bulk density, apparent porosity and true porosity
GB / T 7322 refractory test method
YB / T 370 refractory test method for softening temperature under load
GB / T 7320 refractory thermal expansion test method
GB / T 3001 Refractory test method at room temperature

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