basic introduction

ZRLK testing integrates the resources of the whole industry, testing includes products such as refractory materials, fire retardant materials, flame retardant materials, thermal insulation materials, fire retardant paint testing, etc., focusing on items such as fire resistance, combustion performance, flame retardant rating, fire rating, smoke oxygen index, etc. , Provide authoritative third-party CMA/CNAS qualification test reports based on domestic and foreign test standards.

Testing service

Common refractory testing

Non-oxides such as graphite, silicon brick, clay brick, AZS brick, corundum brick, magnesia chrome brick, silicon carbide brick, silicon nitride bonded silicon carbide brick, nitride, silicide, sulfide, boride, carbide, etc. Refractory materials; calcium oxide, chromium oxide, aluminum oxide, magnesium oxide, beryllium oxide, diatomaceous earth products, asbestos products, insulation boards, furnace repair materials, ramming materials, casting materials, plastics, refractory mud, refractory spray repair, etc.

Flame retardant testing

Flame retardant fabric, flame retardant chemical fiber, flame retardant plastic, flame retardant rubber, fire retardant coating, flame retardant wood material and flame retardant paper, inorganic non-combustible filler material, flammability, non-combustibility, flame retardant, solid phase flame retardant, Gas phase flame retardant, physical effect flame retardant, etc.

Fireproof coating inspection

Fire-retardant coatings, fire-retardant coatings for steel structures, fire-retardant coatings for wood, fire-retardant coatings for concrete structures, fire-retardant coatings for tunnels, fire-retardant coatings for cables, fire-retardant coatings for construction, etc.

Fire detection of building materials

Inspection of various fire-resistant building components, fire resistance limit, material smoke toxicity hazard classification, non-combustibility of building materials, smoke density grade, flammability of building materials, combustion performance classification of building materials and products, fire performance, etc.

Automobile and rail transit fire resistance test

Detection of combustion characteristics of automotive interior materials, according to "GB 8410"; fire and flame retardant tests of rail transit, according to TB/T 3138 technical conditions for flame retardant materials for locomotives, TB/T 3237 technical conditions for flame retardant materials for motor vehicle interiors

Fire test for soft furniture

Burning grades (A1, A2, B1, B2), curtains/curtains, wooden floors/carpets/plastics/rubber floors/floors/artificial stone and other flooring materials, upholstered furniture and components, etc.

Test items

Structural performance: porosity, volume density, water absorption, air permeability, pore size distribution, etc.

Thermal performance: thermal conductivity, thermal expansion coefficient, specific heat, heat capacity, thermal conductivity, thermal emissivity, etc.

Mechanical properties: compressive strength, tensile strength, flexural strength, torsional strength, shear strength, impact strength, wear resistance, creep, bond strength, elastic modulus, etc.

Performance: refractoriness, softening temperature under load, change in reburning line, thermal shock resistance, slag resistance, acid resistance, alkali resistance, hydration resistance, CO corrosion resistance, electrical conductivity, oxidation resistance, etc.

Fire retardant coating test items: fire resistance limit, fire resistance time, state, fineness, drying time, adhesion, flexibility, impact resistance, water resistance, moisture and heat resistance and flame resistance time, paint adhesion, impact resistance, water resistance 、Heat and heat resistance, flame resistance, appearance and color, state in the container, drying time, initial drying crack resistance, water resistance, dry density, acid or alkali resistance (except additional fire resistance), bonding strength, resistance Compressive strength, cold and heat cycle resistance, fire resistance, heat resistance, humidity resistance, freeze-thaw cycle resistance, salt spray corrosion resistance

Flame retardant material testing: safety monitoring, environmental protection testing, energy saving testing, fire resistance, flame retardancy, ignition, non-combustibility, flammability, smoke density, smoke toxicity, flame retardant test, combustion characteristics, heat release and smoke Gas, fire resistance, combustion performance, combustion calorific value, fire resistance, high temperature resistance, fire rating test, etc.

At present, the mainstream flame retardant evaluation materials mainly pass the following points:

1. Ignitability and flammability, that is, the difficulty of being ignited; 2. Flame propagation speed, that is, the spread speed of the flame along the surface of the material; 3. Fire resistance, that is, the speed of fire penetration through the material member; 4. Release speed (HRR), that is, the heat and speed of the material when it burns; 5. The difficulty of self-extinguishment; 6. Smoke generation, including the amount of smoke, the rate of smoke release, and the composition of the smoke; 7. Combustion performance classification : Seven levels, namely: A1 level, A2 level, B level, C level, D level, E level, F level, etc.

Testing standards

GB/T 2997 Determination of bulk density, apparent porosity and true porosity of dense shaped refractory products

GB/T 7322 Refractories Test method for refractoriness

YB/T 370 Refractories Test method for softening temperature under load

GB/T 7320 Refractories Thermal expansion test method

GB/T 3001 Refractory materials Test method for bending resistance at normal temperature

Our advantage

1. With a professional qualification and experienced expert technical team, we can provide you with professional consultation and services.

2. Have advanced laboratory equipment to ensure the accuracy and reliability of test data.

3. As a third-party testing and certification organization trusted by customers worldwide, we are your certificate of quality.