LY/T 3200-2020General technical requirements for bamboo-culm furniture (English PDF)

5.1 Main dimensions and deviations

It shall meet the requirements specified in Table 1 of GB/T 3324-2017.

5.2 Shape and position tolerance

It shall meet the requirements specified in Table 2 of GB/T 3324-2017.

5.3 Material requirements

5.3.1 Bamboo species

Bamboo species suitable for making round bamboo furniture. Moso bamboo, light bamboo, purple bamboo Red bamboo, tea stalk bamboo, Ci bamboo, white bamboo, etc.

5.3.2 Water content

The moisture content of bamboo in the product is 6.0%~15.0%.

5.3.3 Material

It is advisable to choose mature, moth-free, rot-free, mildew-free, and no shrinkage bamboo materials as round bamboo furniture materials.

5.4 Appearance requirements

Should meet the requirements of Table 1.

5.5 Surface physical and chemical properties

Should meet the requirements of Table 2.Special test conditions and requirements can be agreed between the supplier and the buyer.

5.6 Mechanical properties

Should meet the requirements of Table 3.General furniture is in accordance with the level 3 in Appendix A of GB/T 10357.1-2013 (medium load use, comparison Furniture that is frequent and prone to misuse, such as general bedroom furniture, general office furniture, hotel furniture, etc.) Tests, special test conditions and requirements can be agreed between the supplier and the buyer, and the tests are carried out at other levels in Appendix A.

5.7 Limits of hazardous substances

Should meet the requirements of GB 18584.

6.1 Determination of main dimensions and deviations

Test according to the provisions of 6.1 of GB/T 3324-2017.

6.2 Determination of shape and position tolerance

Test according to 6.2 of GB/T 3324-2017.

6.3 Material inspection

6.3.1 Inspection of insect-eaten, decayed, and mildewed bamboo or wooden materials

Using the method of naked eye observation, carefully check whether there are live insects, eggs, or insects in the bamboo or wood materials Powder, decay, mildew.

6.3.2 Determination of moisture content

According to the provisions of GB/T 17657-2013.

6.3.3 Shrinkage inspection of bamboo materials

Using the method of naked eye observation, carefully check whether there is shrinkage in the bamboo material.

6.4 Visual inspection

6.4.1 Discoloration and fading inspection

Inspect 3 locations on the exterior or interior of the product, and use moist degreased white gauze with bare hands.

Wipe 3 times on each place after coming, the reciprocating distance of the wipe is.200~300mm, observe whether there is a coating part on the gauze the color on the bit.

6.4.2 Inspection of other visual inspection items

It should be under natural light or approximate natural light (such as 40W fluorescent lamp) within the range of 300lx~600lx.

The sight distance is within 700mm~1000mm, using visual inspection or a steel ruler with an accuracy of 0.5mm for measurement. When there is a dispute, by Three people conduct joint inspection, and two or more people have the same opinion as the inspection result.

6.5 Physical and chemical performance test

6.5.1 Test of physical and chemical properties of paint film coating on bamboo parts, wooden parts and wood-based panels the resistance of the paint film to cigarette burns is tested according to the provisions of 4.45 in GB/T 17657-2013, and the remaining items are tested according to GB/T 4893.2~4893.3-2005 and 4893.7~4893.9-2013 specified tests.

6.6 Mechanical performance test

The strength, durability and stability of round bamboo furniture are measured in accordance with the provisions of GB/T 10357.1~10357.7-2013.

6.7 Determination of the limit of hazardous substances

Test according to GB 18584.

7.1 Inspection classification

Inspection is divided into factory inspection and type inspection.

7.2 Factory inspection

7.2.1 Factory inspection

The inspection performed when the product leaves the factory or when it is delivered.

7.2.2 Factory inspection

The factory inspection items include.

a) Main dimensions and their deviations (5.1);

b) Shape and position tolerance (5.2);

c) Material requirements (5.3);

d) Appearance requirements (5.4).

7.2.3 Sampling and batching rules for factory inspection

Ex-factory inspection should be fully inspected, and sampling inspection can be implemented if it is difficult to complete inspection due to large batches. Sampling inspection method basis According to the regulations in GB/T 2828.1-2012, normal inspection and one-time sampling plan are adopted, the general recommendation level is II, and the acceptance quality (AQL) is 6.5.The sample size and judgment value are in accordance with Table 5.

Note. 26 pieces or less are full inspection

7.2.4 Judgment of factory inspection results

7.2.4.1 In the single product inspection items, the basic items are all qualified, and the general items are not more than 3 items, then the product is judged to be qualified Product, otherwise it is unqualified.

7.2.4.2 When each product in the set of products is qualified, the set of products is determined to be qualified, otherwise it is unqualified.

7.2.4.3 For the evaluation of batch of products, if the number of unqualified products is less than or equal to the acceptance number (Ac) in the sample volume specified in Table 5, the batch is determined the product is a qualified batch; if the number of unqualified products is greater than or equal to the rejected number (Re), the batch of products is determined to be an unqualified batch.

7.3 Type inspection

7.3.1 Type inspection items

Type inspection shall include all items required by this standard (except items not required by contract).

7.3.2 Timing of type inspection

During normal production, inspections should be carried out regularly, and the inspection cycle is generally one year; in one of the following cases, type inspections should be carried out.

a) When the raw and auxiliary materials and production process undergo major changes;

b) When the product has been discontinued for half a year or more and production is resumed;

c) Trial type appraisal of new products or old products transferred to factories;

d) When the user puts forward the type inspection requirements and stipulates in the order contract;

e) When the quality supervision agency proposes type inspection requirements.

7.3.3 Sampling rules for type inspection

In an inspection cycle, 2 samples are randomly selected from the recently produced products, 1 is sent for inspection, and 1 is sealed.

7.3.4 Type inspection procedure

The inspection procedure shall follow the principle of not affecting the correctness of the remaining inspection items as much as possible.

7.3.5 Judgment of type inspection results

7.3.5.1 In the single product inspection items, all the basic items are qualified, and the general items are not more than 4, and the product is determined to be qualified Product, otherwise it is unqualified.

7.3.5.2 Each product in the set of products shall be evaluated in accordance with 7.3.5.1.When each product is qualified, the set of products shall be determined as Qualified products, otherwise unqualified products.

7.3.6 Type inspection reinspection rules

If the product is judged to be unqualified after the type inspection, if there is any objection to the inspection result, the sealed spare sample can be re-inspected. Right Qualified items and items not inspected due to damage to the test piece shall be inspected, and shall be evaluated in accordance with 7.3.5, and "re-inspection" shall be indicated in the inspection result.

8.1 Marking and instructions for use

Logo and instructions for use include.

a) Product name, model specification, product implementation standard number;

b) The name and grade of the main raw and auxiliary materials of the product;

c) Control indicators for the limit of harmful substances in products;

d) Inspection certificate and production date;

e) Technical requirements and precautions for product installation and adjustment;

f) Product use method and matters needing attention;

g) Product maintenance methods;

h) Manufacturer's guarantee and after-sales service requirements.

8.2 Packaging

The packaging should have sufficient firmness to ensure that the product avoids bumps, scratches and stains under normal transportation and storage conditions. The packaging should There are instructions for use, precautions for use, use environment, etc., and related safety warning signs.

8.3 Transportation and storage

During the transportation and storage of the product, the necessary protection shall be taken to prevent pollution, moth-eaten, damp, and sun exposure.

When storing, they should be stacked separately according to category, specification and grade.