Does the security board need to be retested? And what retests do I need to do?

I just checked for you, and according to the relevant regulations, this is a necessary retest.

This should need to be retested, because now this is bringed, and everything basically needs to be retested.

This does not need to be retested, and it is generally not necessary to use it normally.

！Do I need to re-test the security handle? I think of course I need to retest, sometimes I have to retest, but sometimes I don't.

Yes, in general, this kind of retest is more secure.

No, the security board is not very famous, and it shouldn't be very strict!

If you pass it for the first time, you don't need to attach it, and if you don't have it for the first time, you will have to retest.

Do I need to re-test the plate? I think it should be needed, and if you know if you need it or not, you can ask someone else.

In the process of project construction, all materials used in the main body or materials used in decoration need to have a certificate and a retest report, otherwise it is considered to be a qualified material.

This should be a reminder, after all, this thing you made, it must need to be checked before it can continue to be used normally.

Do I need to copy the security version? This one is not very clear, you can get to or. Where is the professional place to search for specific answers.

Except for special requirements, there is generally no need to retest. The full name of polystyrene board is polystyrene foam board, also known as foam board or EPS board. It is made of expandable polystyrene beads containing a volatile liquid blowing agent, which is pre-fired in a mold after heating.

This is a must, because we know that this is still very secure, so we must take the exam.

Cement, electrical wiring, water pipes, waterproof and fireproof materials, stone, man-made panels, etc.

Whether there are hard and fast regulations for roof vents, and general practices (more detailed). Whether it is necessary to set up air outlets for extruded board insulation roofAnswer: "Technical Code for Roofing Engineering" GB 50345-2004, Chapter 9 Thermal Insulation Roof.

Section Design Essentials.

The construction of the insulation layer shall comply with the following provisions:

4. Hygroscopic insulation materials should not be used for closed insulation layers, and should comply with the provisions of Article 1 of this specification when they need to be used. When it is difficult to dry the roof insulation layer, it is advisable to use exhaust roofing, and the design of exhaust roofing should comply with the following provisions:

1. The lattice joint provided by the screed layer can double as an exhaust duct; When paving the coil, it is advisable to use the empty laying method, the point sticking method, and the strip sticking method.

2. The exhaust duct should be vertically and horizontally connected, and communicate with the exhaust pipe that communicates with the atmosphere; The exhaust pipe can be located under the cornice or at the intersection of the roof exhaust duct.

3. The exhaust duct should be set vertically and horizontally, and the spacing should be 6m. For every 36m of roof area, an exhaust hole should be set up, and the exhaust hole should be waterproofed.

4. Plastic sheets with supports can also be laid under the insulation layer to drain and exhaust through the cavity layer. (I usually say the lower row type.) ）

Whether the extruded board insulation roof must be provided with air outlets.

Answer: According to the above, it should be determined whether the extruded plastic board is a hygroscopic insulation material to determine, "whether the extruded plastic board insulation roof must be provided with air outlets". If it is a hydrophobic individual, it is not necessary, but on the contrary, it is necessary for an individual.

The combustion performance of extruded plastic board must reach Class A. Which can be very costly. The above is for reference.

In GB50404-2017, there are only technical indicators of sprayed polyurethane for roofing, and the polyurethane board used for roofing is to meet the requirements of GB50345 specifications, but there are no specific indicators in GB50345, but only test items. Whether the performance of polyurethane board for roofing can be tested with GB50404 polyurethane for external wall insulation is still a problem, because of the lack of compressive indicators.

Tianhua new materials professional answer you, I don't know what kind of fireproof board you are talking about. Now that logistics and information technology are so developed, there is no need to buy them locally. The most common fireproof board is the ordinary woodworking board pasted with fireproof skin, and the fireproof grade is B1 level, which can barely pass the fire acceptance.

Now inorganic fireproof board has been accepted by more and more people, such as glass magnesium board belongs to the inorganic new green building materials, the fire rating is A1 level, you can pay more attention to understand it!

The certificate is valid for 5 years.

The certification body shall, according to its follow-up inspection of the certified products and their manufacturers, indicate on the certification certificate the inquiry of the effective status of the annual inspection**and**.

If the validity period of the certification certificate expires and it is necessary to continue to use it, the certification client shall apply for it within 90 days before the expiration of the validity period of the certification certificate.

In any of the following circumstances, the certification client shall apply to the certification body for the change of the certification certificate, and the certification body shall make corresponding treatment according to different circumstances:

1) If the name or model of the product is changed due to the change in the naming method of the certified product, or the name and address of the producer or manufacturer of the certified product are changed, the certification certificate shall be changed after verification by the certification body;

2) The model of the certified product is changed, but it does not involve changes in safety performance and internal structure of electromagnetic compatibility; or if the certified product is reduced to the same product model, the certification certificate shall be changed after confirmation by the certification body;

3) If the key components, specifications and models of the certified products, as well as the design, structure, process and materials or raw material production enterprises involved in the safety or electromagnetic compatibility of the whole machine are changed, the certification certificate shall be changed after the certification body re-tests and qualified;

4) If there is a change in the location of the certified product manufacturer or its quality assurance system and production conditions, the certification certificate shall be changed after the certification body has passed the re-factory inspection;

5) Other circumstances that should be modified.