LY/T 3204-2020Flattened bamboo sheet (English PDF)

4.1 Appearance quality

Should meet the requirements of Table 1.

4.2 Specifications and deviations

4.2.1 Commonly used specifications.

--Length. 400mm, 450mm, 500mm, 800mm, 1250mm, 2050mm;

--Width. 135mm, 190mm, 260mm, 280mm, 300mm, 320mm, 350 mm;

--Thickness. 6 mm ~12 mm.

Specifications and dimensions can also be agreed upon by both parties.

4.2.2 Dimensional deviation

4.3 Physical and chemical performance indicators

Should meet the requirements of Table 3.

5.1 Appearance quality

5.1.1 Measuring tools

5.1.1.1 Steel tape, length 3 m, graduation value 1.0 mm.

5.1.1.2 Steel ruler, the graduation value is 0.5 mm.

5.1.1.3 Feeler gauge, graduation value 0.02 mm.

5.1.1.4 Six times reading magnifying glass.

5.1.2 Detection method

According to the appearance quality requirements of Table 1, the sampled samples shall be inspected by visual inspection or a six-fold reading magnifying glass to determine their grade.

5.2 Specifications and dimensions

5.2.1 Measuring tools

5.2.1.1 Steel tape, length 3 m, graduation value 1.0 mm.

5.2.1.2 Steel ruler with a graduation of 0.5 mm.

5.2.1.3 Micrometer, the graduation value is 0.01 mm.

5.2.1.4 Vernier caliper, graduation value 0.02 mm.

5.2.1.5 Feeler gauge, graduation value 0.02 mm.

5.2.1.6 Straight angle ruler, accuracy level 2.

5.2.2 Detection method

5.2.2.1 Length, width

According to the provisions of GB/T 19367-2009 in 8.2.

5.2.2.2 Thickness

According to the provisions of GB/T 19367-2009 in 8.1.

5.2.2.3 Right angle

According to the provisions of GB/T 19367-2009 in 8.3.

5.3 Water content

Carry out according to the method specified in 4.3 of GB/T 17657-2013.

5.4 Static bending strength

Carry out according to the method specified in 4.7 of GB/T 17657-2013.

6.1 Batching rules and sampling plan

6.1.1 Batch rules

The raw materials and production conditions are basically the same, and the products produced on the same day or in the same group shall be sampled according to the batch number.

6.1.2 Sampling plan for size inspection

Adopt the normal inspection secondary sampling plan in GB/T 2828.1-2012, the inspection level is I, and the acceptance quality limit (AQL) is 6.5, see Table 4.

6.1.3 Sampling plan for appearance quality inspection

Adopt the normal inspection secondary sampling plan in GB/T 2828.1-2012, the inspection level is II, and the acceptance quality limit (AQL) is 4.0, see Table 5.

6.1.4 Sampling plan for physical and chemical performance inspection

The physical and chemical performance inspection adopts the re-inspection sampling plan, see Table 6.If the sample inspection result of the first sampling is unqualified, the re-inspection Check the sample size to take samples and re-check the unqualified items. The sampling shall be randomly selected from the inspection lot.

6.2 Judgment rules

6.2.1 Judgment rules for appearance quality and specification dimensions and their deviation inspection results the number of samples inspected for the first time should be equal to the number of first samples of the plan. If the number of nonconforming products found in the first sample is less than or equal to the first acceptance number, the batch of products should be considered acceptable; if the number of unqualified products found in the first sample is between the first Between the number of acceptances and the number of first rejections, a second sample shall be taken.

If the cumulative number of nonconforming products found in the first and second samples is less than or equal to the second acceptance number, the batch of products is determined to be acceptable Accepted; if the number of unqualified products found in the cumulative first and second samples is greater than or equal to the second rejected number, then the batch is judged Products are not acceptable.

6.2.2 Judgment rules of physical and chemical performance test results

When the moisture content of the samples all meet the index value, the moisture content of the batch of products is judged to be qualified; otherwise, a re-inspection should be carried out. Of retested samples when the moisture content meets the index value, it is judged as qualified.

6.3 Type of inspection

It is divided into factory inspection and type inspection.

6.3.1 Factory inspection

Each batch of products should undergo factory inspection. The factory inspection is carried out by the quality inspection department of the production unit, or a third-party inspection agency can be entrusted.

The inspection items are appearance quality, specifications and dimensions, and moisture content.

6.3.2 Type inspection

During normal production, periodic inspection once a year. The inspection items are all items specified in this standard. One of the following situations Type inspection should be carried out when.

a) When production is suspended for a long time and production is resumed;

b) Changes in raw materials or changes in the main production process may affect product quality;

c) When the national market supervision and administration department proposes a type inspection request;

d) When there is a big difference between the factory inspection and the last type inspection.

6.4 Comprehensive judgment

When the product appearance quality, specification size and physical and chemical performance test results meet the corresponding technical requirements, the product is judged to be qualified.

Otherwise, it is judged as unqualified.

7.1 Logo

The product mark should include the following. product name, specification, quantity, grade, standard number, production date, name of the manufacturer According to the supply, the label must be clear.

7.2 Packaging

Products should be packaged separately according to product category, specification and grade when leaving the factory. The packaging should be firm, tidy, and moisture-proof.

The columns are neatly arranged, the packaging materials, specifications and models of the same batch of products should be consistent, and detailed product instructions should be provided. If the contract provides otherwise, According to the contract.

7.3 Transportation and storage

The products should be stacked flat during transportation to prevent damage. They should not be exposed to damp, rain or exposure to the sun, and are not allowed to be chemically or corrosive.

Mixed goods. Products should be stored in a dry, clean, ventilated warehouse or rain-proof shelter, and away from fire sources; storage should be classified according to category, the specifications and grades are stacked separately, and each stack should be marked accordingly.