MZ/T 109-2018Supportforsignsofgeographicalname (English PDF)

4.1 Settings

4.1.1 The support for place name signs is generally set up in a column or cantilever manner.

4.1.2 Select the pre-buried or direct-buried method according to the setting needs.

MZ/T 109-2018

4.2 Structure

4.2.1 The support members should generally be made of metal steel members, and aluminum alloy profiles, reinforced concrete columns, or wooden columns can also be used as required. Metal when steel members are made of non-corrosive materials, anti-corrosion treatment such as galvanizing or plastic coating should be performed.

4.2.2 The shape and size of metal steel components shall meet the design requirements, and the outer diameter, thickness and bending of seamless steel tubes for structures shall meet According to the requirements of GB/T 8162, the outer diameter, thickness and bending of straight seam welded steel pipes shall meet the requirements of GB/T 13973.

4.2.3 Cover the column cap with anticorrosive coating as required. The structure size of the column cap shall meet the design requirements.

4.3 Appearance

4.3.1 The surface of the support should be smooth and free from dirt, and there should be no obvious defects such as rust, cracks, damage, scratches, deformation, delamination, and scarring.

4.3.2 The appearance color of the support should be coordinated with the sign board.

4.3.3 The galvanized layer shall be uniform and complete, consistent in color and smooth, and shall be free from defects such as sagging, dripping or excessive agglomeration, missing plating and welds.

4.3.4 The plastic coating shall be uniform, smooth, continuous, and free from defects such as small holes, space, pores, cracks, peeling and other skin distinguishable by naked eyes.

4.4 Coating properties

4.4.1 Galvanization

The use of metal steel components as support members, the coating quality should meet the requirements of GB/T 18226, tested in accordance with the method specified in 5.3.1, the amount of galvanization should meet the following requirements.

a) For large components such as columns, cantilevers, flanges, the amount of galvanization should not be less than 600g/m2;

b) For small components such as fasteners, the amount of zinc plating should not be less than 350g/m2.

4.4.2 Galvanized coating uniformity

After testing according to the method specified in 5.3.2, the surface of the galvanized layer shall be uniform and free of metallic copper deposits.

4.4.3 Adhesive properties of galvanized layer

The galvanized layer of the galvanized component and the base metal should be tightly connected. After testing according to the method specified in 5.3.3, the galvanized layer should not peel.

Such as peeling, bulging, cracking or delamination to the extent that it can be wiped off with bare fingers.

4.4.4 Impact resistance of plastic coating

After the test according to the method specified in 5.3.4, there were no obvious cracks, wrinkles, and peeling of the plastic coating except the impacted part.

4.4.5 Bending resistance of plastic coating

After testing in accordance with the method specified in 5.3.5, the plastic coating shall be free from visible cracks or peeling.

4.4.6 Adhesive properties of plastic coating

After testing according to the method specified in 5.3.6, the thermoplastic powder coating is not lower than level 2 and the thermosetting powder coating is not lower than level 0.

4.4.7 Chemical resistance of plastic coating

After testing according to 5.3.7, the plastic coating should be free of bubbles, softening, and loss of adhesion.

4.4.8 Flame retardancy of plastic coating

The plastic coating and polymer plastic components shall be flame-resistant materials. After testing according to the method specified in 5.3.8, their oxygen index shall be greater than 27.

MZ/T 109-2018

4.5 Mechanical properties of materials

The mechanical properties of supporting members such as columns, cantilevers and fasteners shall comply with GB/T 8162, GB/T 13793, GB/T 228.1 GB/T 16938 and related requirements.

4.6 Environmental performance

4.6.1 Weatherability

After the artificial accelerated aging test in accordance with the method specified in 5.5.1 for 120 hours.

a) The support should be free of cracks, nicks, rust, corrosion, dents, bubbles, peeling, chalking, etc .;

b) The performance of the coating shall meet the relevant requirements in GB/T 18226.

4.6.2 Salt spray corrosion resistance

After testing according to the method of 5.5.2, the surface coating of the support should not be discolored or blistering, and the metal and steel components should not have corrosion.

4.6.3 High temperature resistance

After testing according to the method of 5.5.3, the surface coating of the support should not show cracks, softening, peeling, wrinkles, blistering, warping, etc.

4.6.4 Low temperature embrittlement resistance

After testing according to the method specified in 5.5.4.

a) The surface coating of the support should not be discolored or cracked;

b) After impacting the support according to the method specified in 5.3.4, its performance shall meet the requirements of 4.4.4.

4.6.5 Humidity and heat resistance

After testing in accordance with the method specified in 5.5.5, the surface coating of the support shall not exhibit softening, peeling, wrinkling, blistering, warping, etc.

4.6.6 Wind resistance

In the following cases, the support for place name signs should not crack, deform, and separate from the place name sign board.

a) When used in ordinary cities, it can withstand a wind of 8 or more in the Pufu wind level for 1h;

b) When used in strong wind cities, coastal cities and non-urban areas, they can withstand a wind of magnitude 12 or more in the Pufu wind meter for 1 hour.

5.1 Preparation of sample

Prepare the specimen as required in one of the following methods.

a) Take the complete support product as a sample;

b) take the required size of the test from the support product as a sample;

c) Using the raw materials of the support, make samples according to the requirements of the test.

Before the test, the sample should be placed in a standard test environment (temperature 23 ° C ± 2 ° C, relative humidity 50% ± 10%) for 24 hours.

5.2 Visual inspection test method

Visual inspection in a bright environment (illumination is not less than 150lx), the appearance is not defective.

MZ/T 109-2018

5.3 Test methods for coating properties

5.3.1 Test method for galvanizing amount

The amount of galvanized layer attached is determined by weight method, and tested according to the method of Appendix C in GB/T 26941.1-2011.

5.3.2 Test method for zinc coating uniformity

A 300 mm column sample was taken and tested by the copper sulfate impregnation method in accordance with the method in Appendix A of GB/T 26941.1-2011.

5.3.3 Test method for adhesion of galvanized layer

It is determined by hammer test, and tested according to the method of Appendix B in GB/T 26941.1-2011.

5.3.4 Test method for impact resistance of plastic coating

Take a 300mm column sample and test it according to the method specified in GB/T 1732.

5.3.5 Test method for bending resistance of plastic coating

A 300 mm long specimen was prepared, and the core rod diameter was 180 ° around the core rod at a uniform speed within 15 s.

5.3.6 Test method for adhesion of plastic coating

Test in accordance with the method specified in GB/T 26941.1.

5.3.7 Test method for chemical resistance of plastic coating

Tested according to the method specified in GB/T 1147, the test solution concentration and immersion time are shown in Table 1.

Table 1 Chemical resistance test requirements of plastic coating

Solution type Solution concentration /% Soak time/h H2SO4 30 720 NaOH 1 240 NaCl 10 720 Note. H2SO4, NaOH and NaCl solutions are all mass percentage concentrations.

5.3.8 Test method for flame retardancy of plastic coating

The flame retardancy of the plastic coating is tested in accordance with the regulations in GB/T 2406.1.

5.4 Test methods for mechanical properties of materials

The tests are performed in accordance with the requirements of GB/T 8162, GB/T 13793, GB/T 228.1 and GB/T 16938.

5.5 Environmental performance test method

5.5.1 Test method for weather resistance

A 150 mm × 90 mm sample was prepared and tested in accordance with the weather resistance test method of GB 1733.

MZ/T 109-2018

5.5.2 Test method for salt spray corrosion resistance

A 150 mm × 90 mm sample is prepared and tested in accordance with the test method for salt spray corrosion resistance of GB 1733.

5.5.3 Test method for high temperature resistance

A 150 mm × 90 mm sample was prepared and tested in accordance with the high temperature resistance test method of GB 1733.

5.5.4 Test method for resistance to low temperature embrittlement

Prepare a 150mm × 90mm sample without blocking and put it in a temperature and humidity control box, control the temperature at -60 °C ± 5 °C, and perform a test for 168h After the test, it is left for 2 hours under the normal temperature environment, and the impact resistance test is performed according to the provisions of 5.3.4, and the results are compared with the results before the test.

5.5.5 Test method for humidity and heat resistance

A 150 mm × 90 mm sample was prepared and tested in accordance with the test method for moisture and heat resistance of GB 1733.

5.5.6 Test method for wind resistance

Use the same wind force that conforms to the Pufu wind meter, and continue to act on the support with the place name sign for 1h.

6.1 Type inspection

6.1.1 Type inspection conditions

Type inspection should be carried out in one of the following situations.

a) When the new product is trial-typed or the old product is transferred to the factory for production;

b) After the formal production, if there are major changes in structure, materials and processes, which may affect product performance;

c) when the product is discontinued for one year or more, when production resumes

d) in normal batch production, once every two years;

e) When the factory inspection results are significantly different from the last type inspection;

f) when requested by the national quality supervision agency.

6.1.2 Type inspection items

The items for type inspection include all the requirements of Chapter 5.

6.1.3 Sampling for type inspection

A sample of the type inspection shall be taken at random.

6.2 Factory inspection

6.2.1 Factory inspection conditions

Before delivery to the user, the factory's quality inspection department should perform factory inspection.

6.2.2 Factory inspection items

The factory inspection items should include the following.

a) size specifications;

MZ/T 109-2018

b) appearance;

c) other properties.

6.3 Decision rules

In accordance with the requirements of 7.2.3 in GB 1733-2008.