After the fire retardant coating enters the site, do I still need to take samples for inspection?

Fire retardant coatings. After entering the site, samples need to be taken and sent for inspection.

The witnessing, sampling and inspection of fireproof coatings are simply witnessed by the on-site material supervisor and supervised by the technical supervisor.

At the construction site, the fire retardant coating products are sampled, generally on the left and right, and sealed.

The witness unit (supervision company) appoints a witness to keep the materials with the construction unit (fireproof coating company or related engineering company) and send them to a testing station or scientific research institute with fireproof coating testing qualifications for testing. The test items are routine tests, mainly for bond strength and compatibility (i.e., whether there is a chemical reaction with the primer.

After the fireproof coating enters the factory, it needs to be sent for inspection, general glue sampling inspection, there is a supervisor responsible for the supervision of sampling, and then sent to the inspection center for testing, the general testing items are: adhesion strength, compressive strength, expansion multiple, water resistance, etc., different types of fireproof coating inspection items are different.

If necessary, the dosage will be sent for inspection once after a certain amount. Intumescent fire-retardant coatings are inspected once every 100 tons, and non-intumescent fire-retardant coatings are inspected once every 500 tons.

On-site material supervision and witness inspection by the technical supervisor supervision engineer at the construction site of the fire retardant coating products sampling (left and right), and sealed, by the witness unit (supervision company) appointed by the witness to keep the material with the construction unit (fire retardant coating company or related engineering company, that is, their own) sent to the testing station or scientific research institute with fire retardant coating testing qualifications for testing, The test items are routine tests, mainly for the bond strength and compatibility (that is, whether there will be a chemical reaction with the primer), such as the compatibility test, you should bring your own on-site primer or topcoat 1kg experimental sample, the test cost is less than 1000, and other costs are at your own expense.

Generally, it is needed, and in order to ensure product quality after the fire retardant coating enters the site, it will be sampled and sent for inspection.

When more than 100 tons of intumescent fire retardant coatings are used, a sampling retest is conducted. The retest of the fire retardant coating is to prove that the performance of the fire retardant coating meets the requirements of the standard. For those who have been in the venue for a long time, there is no need to submit it for inspection again.

When the qualified intumescent fireproof coating is burned by strong fire such as blowtorch, a large amount of foaming and expansion, the surface will gather and convex, and there will be no burning within a few minutes, while the fake and shoddy fireproof coating will basically not foam, and a large number of scattered slag will occur, and the wood substrate will soon be burned and damaged.

Fire protection principle of fire retardant coatings:

1. The fireproof coating itself is not combustible, so that the protected substrate is not directly in contact with the oxygen in the air.

2. The fire retardant coating has a low thermal conductivity, which delays the conduction rate of high temperature to the substrate.

3. The fireproof coating is heated to decompose non-combustible inert gas, and dilute the flammable gas decomposed by the heat of the protected object, so that it is not easy to burn or the combustion speed is slowed down.

4. The nitrogen-containing fireproof coating is heated to decompose NO, NH3 and other groups, which are combined with organic free radicals to interrupt the chain reaction and reduce the temperature.

The retest of the fire retardant coating is to prove that the performance of the fire retardant coating meets the requirements of the standard. For those who have been in the venue for a long time, there is no need to submit it for inspection again. The standard stipulates that when the intumescent fire retardant coating is used for more than 100 tons, a sampling re-inspection shall be carried out.

When the qualified intumescent fireproof coating is burned by strong fire such as blowtorch, a large amount of foaming and expansion, the surface will gather and convex, and there will be no burning within a few minutes, while the fake and shoddy fireproof coating will basically not foam, and a large number of scattered slag will occur, and the wood substrate will soon be burned and damaged.

The sampling standard for fire retardant coatings is to randomly sample from each batch of products, and the number of samples is 3% of the total number of packaging drums from the same manufacturer. When sampling, the lid of the barrel is opened, and the liquid fireproof coating product in the barrel is visually observed, and the surface state is recorded, if there are crusts, sinking bottoms, gelling, delamination and other phenomena.

The fireproof coating in the barrel is fully stirred, and the sampling of each barrel shall not be less. The sample is divided into two parts: one for sealed storage and the other (the number of which should be the number of tests that can carry out all the specified test items) for immediate inspection.

If the inspection results do not meet the requirements of the standard, the whole batch of products is considered unqualified.

For sampling the production line, the same amount of sample should be taken from the discharge port at appropriate intervals for remixing. After stirring well, take two parts of the sample and put it into the sample container, cover it tightly and mark it.

The same type and the same batch number of fireproof coatings produced by the same manufacturer are one inspection batch.

The amount of an inspection batch: the maximum quantity of thin-coated fire-retardant coating is 100t, and the maximum quantity of thick-coated fire-retardant coating is 500t.

300 tons of thin steel structure fireproof coating will be sampled once, and 500 tons of thick type will be sampled once.

Fire retardant coating entry re-inspection items:

1.Intumescent steel structure fireproof coating (original ultra-thin type, thin Qi Yu type): bond strength.

2.Non-intumescent Xiaochi steel knot Li structure fire retardant coating (thick type): adhesion strength, compressive strength.

The re-examination of fire-retardant coatings is to prove the fire-retardant coating review construction requirements under the sampling inspection certificate in terms of the owner, supervision, design, construction and other related aspects. There are clear requirements in the specification.

Summary. Hello dear, I am happy to answer for you Yes, the on-site inspection of fire retardant coatings is a mandatory inspection item. According to the fire protection code designed by the Chinese building standard, the external walls, curtain walls, pipelines and tunnels of buildings should meet certain fire resistance limits; Fire retardant coating is a fireproof material that can improve the fire resistance level of buildings and prolong the combustion time.

Therefore, the on-site inspection of fireproof coatings is one of the important measures to ensure that the fire resistance of buildings is qualified. The above is mine, I hope these contents can help you, is the on-site inspection of fire retardant coatings a mandatory item?

Hello, I'm glad to answer for you Yes, the on-site inspection of anti-Li Xinhuo coating is a mandatory inspection item. According to the fire protection code designed by the Chinese building standards, the external walls, curtain walls, pipelines and tunnels of buildings should meet certain fire resistance limits; Fire retardant coating is a fireproof material that can improve the fire resistance level of buildings and prolong the combustion time. Therefore, the on-site inspection of fire retardant coating slag is one of the important measures to ensure that the fire resistance of the building is qualified.

The above is mine, I hope these contents can help you, do you need to do fire resistance limit testing for fire retardant coatings entering the factory for re-inspection, there is a factory inspection report, and do you still need to do fire resistance testing for the re-inspection of the project.

The re-inspection of the factory needs to do the fire resistance limit test.

Both the factory test report and the re-inspection report need to be tested for the fire resistance limit. Yes.

Expansive typeFire-retardant coatings hail teasing thisA sample retest is carried out when more than 100 tons are used. The retest of the fire retardant coating is to prove that the performance of the fire retardant coating meets the requirements of the standard. For those who have been in the venue for a long time, there is no need to submit it for inspection again.

When the qualified intumescent fireproof coating is burned by strong fire such as blowtorch, a large amount of foaming and expansion, the surface will gather and bulge, and the source will not be burned within a few minutes, while the fake and shoddy fireproof coating is basically not foamed, and there will be a large number of scattered slag, and the wood substrate will also be burned and damaged soon.

Fire protection principle of fire retardant coatings:1. The fire-retardant coating means that the stool body is not combustible, so that the protected substrate is not in direct contact with the oxygen in the air.

2. Fireproof coatings have low thermal conductivity.

Retards the conduction rate of high temperatures to the substrate.

3. The fireproof coating is heated and decomposes into non-flammable inert gas.

Dilution of flammable gases decomposed by heat of the protected object.

Make it less flammable or burn slower.

4. The nitrogen-containing fireproof coating is heated to decompose NO, NH3 and other groups, and organic free radicals.

compounding, interrupting the chain reaction, lowering the temperature.

The retest of fire retardant coating is to prove part of the function of fibrile permeable fire retardant coating. According to the requirements, after the fireproof coating enters the site, it needs to be witnessed, sampled, and then sent to the testing department for testing.

After the construction of the project is completed, the fire protection acceptance needs to be dry and the vertical pin is not swollen, and the coating thickness inspection report of the fireproof coating must be provided!