GB/T 6891-2018Aluminium and aluminium alloy profiled sheet (English PDF)

3.2 Quality assurance

3.2.1 Base material

The quality of base material shall conform to the provisions of GB/T 3880.1.

3.2.2 Fluorocarbon paint coating

The quality of fluorocarbon paint coating can refer to A.2.3 of GB/T 5237.5-2017.

3.3 Chemical composition

The chemical composition of the profiled sheet shall conform to the provisions of GB/T 3190.

3.4 Size deviation

3.4.1 The cross-sectional dimension of the profiled sheet shall conform to the provisions of the drawings specified by both the supplier and the purchaser. The marking of the cross-sectional dimension can refer to Figure 1.

4.4.2 Flexibility

It shall be carried out as per the T-bending method specified in GB/T 8013.3.

4.4.3 Hydrochloric acid resistance

4.4.3.1 The hydrochloric acid resistance of the spray coated profiled sheet shall be carried out as per the dripping method specified in GB/T 8013.3.

4.4.3.2 The hydrochloric acid resistance of the roller coated profiled sheet shall be carried out as per the standing method specified in GB/T 8013.3.

4.4.4 Nitric acid resistance

It shall be carried out as per the gas phase method specified in GB/T 8013.3.

4.4.5 Solvent resistance

It shall be carried out as per the Wiping Method II specified in GB/T 8013.3.

4.4.6 Heat and humidity resistance

It shall be carried out as per the constant heat and humidity test method specified in GB/T 8013.3.

4.4.7 Other film layer performances

Other film layer performances shall be carried out as per the provisions of GB/T 8013.3.

4.5 Appearance quality

The appearance quality shall be tested as per the visual examination or method agreed by the supplier and the purchaser.

5.1 Inspection and acceptance

5.1.1 The product shall be inspected by the supplier to ensure that the product quality conforms to the provisions of this Standard and ordering form (or contract); and fill in the quality certificate.

5.1.2 The purchaser shall inspect the received products as per the provisions of this Standard. If the inspection results are inconsistent with the provisions of this Standard and the ordering form (or contract), it shall be proposed to the supplier in written form; […]

6.1 Marking

6.1.1 Product marking

On the products that pass the inspection, there shall be the following contents (or labels with the following contents):

a) Supplier's name and address;

b) Product name;

c) Seal of the supplier's quality inspection department (or signature or stamp of the quality inspection personnel);

d) Designation, state and size specification (or model);

e) Film layer code and color (or color number);

f) Product batch number or date of production;

g) This Standard number.

6.1.2 Marking on package box

The marking on package box of the product shall conform to the provisions of GB/T 3199.

6.2 Package, transportation and storage

6.2.1 When profiled sheets are packaged, it shall be folded in a simple package. The sheet stack shall be covered with Kraft paper; cover a thin layer of plastic film on top of the sheet stack; then bundle with strapping band or steel strip. The height of each profiled sheet stack shall not exceed 500mm; the gross weight per stack is no more than 2t. Wooden boards or foam boards are needed to separate the profiled sheets during bundling period; never damage the profiled sheet; the package shall be rain proof.

6.2.2 During the transportation period, there shall be reliable support or fixing measures; avoid non-uniform extrusion, mechanical damage, rain and damp. Others shall conform to the provisions of GB/T 3199.

6.2.3 The profiled sheet shall be stored in a dry and ventilated indoor environment. When stored in the open air, it shall be covered by rainproof cover; and there shall be a slop of no less than 3% in the direction of drainage to prevent the water accumulation.

6.3 Quality certificate

Each batch of profiled sheets shall be attached with quality certificate indicating:

a) Supplier's name;

b) Product name;

c) Designation, state and size specification (or model);

d) Film layer code and color (or color number);

e) Batch number or date of production;

f) Weight or number of pieces;

g) Results of each analysis and inspection; and seal for the supplier's quality inspection department;

h) This Standard number.