GB/T 2102-2022Acceptance, packaging, marking and quality certification for steel tubular products (English PDF)

3.1 Packaging

The operational activities in which, to protect products during circulation, facilitate storage and transportation, and promote sales, strapping materials (3.3), containers and auxiliary materials are used, and certain technical methods are applied to wrap, bundle or place one or more steel tubular products in containers to form a cargo unit.

3.5 Marking

A visual image that conveys specific information of steel tubular products composed of symbols, characters, letters, numbers, colors, geometric shapes (or frames) and/or graphics, or a method of identifying its visual image.

3.6 Label

A marking (3.5) card fixed on a package, container or steel tubular product to convey specific information about the steel tubular product.

NOTE: Labels are usually made of paper, hard plastic, metal and other materials.

3.7 Tag

A movable label (3.6).

3.8 Bar code

A symbol consisting of a set of regularly arranged bars, spaces. It can be recognized by machines to represent certain information, including linear bar code (3.9) and two-dimensional bar code (3.10). [Source: GB/T 12905-2019, 2.1]

4.1 Inspection and acceptance

The quality of steel tubular products shall be inspected and accepted by the technical quality supervision department of the manufacturer. The supplier shall ensure that the delivered steel tubular products comply with the corresponding product standards or the provisions of the contract. The purchaser has the right to re-inspect according to the corresponding product standards or contracts.

4.4 Determination of impact test results

4.4.1 A group of 3 specimens shall be used for the impact test of a single sampled steel tubular product. The average value of a group of 3 specimens shall not be less than the specified value (average value). The value (single value) of one specimen is allowed to be lower than the specified value. But it shall not be lower than 70% of the specified value.

4.5 Reinspection and determination

4.5.1 For the test results representing a batch of steel tubular products, when a certain item does not meet the requirements of the product standard, the manufacturer can randomly take double the number of specimens from the same batch of remaining steel tubular products for the reinspection of the rejected item. The test requirements and determination rules for the impact test of each retested steel tubular product shall comply with the provisions of 4.4. If all the reinspection results (including any index required by the test item) meet the product standards or the provisions of the contract, except for the rejected steel tubular products in the initial inspection, this batch of steel tubular products will be determined as accepted.

4.5.2 If the initial inspection fails, the following inspection items are not allowed to be reinspected.

4.5.3 If the reinspection result is rejected or the initial metallographic inspection is rejected, the manufacturer may inspect the remaining steel tubular products of the batch one by one or conduct heat treatment again for the whole batch. The re-heat-treated steel tubular products shall be reinspected and accepted as a new batch. The number of reheat treatments for steel tubular products shall not exceed 2 times.

5.1 General requirements

5.1.1 The packaging shall be able to prevent loosening, deformation and damage of steel tubular products during normal handling, transportation and storage.

5.2 Packaging materials

5.2.1 Packaging materials shall comply with the relevant standards or the provisions of the contract. The packaging materials not included or specified in this document shall be of a quality suitable for the intended use. Packaging materials can be changed according to technological and economic developments.

5.2.2 The selection of packaging materials shall consider reuse and recycling.

5.2.6 When required by the purchaser, the surface of the steel tubular product can be coated with a protective layer. The layer shall be of corrosion resistant material. Application method, coating thickness and ease of removal shall be considered when using. Coating materials are recommended to use the materials shown in Table 1. If the purchaser does not specify in the contract, the coating material shall be selected by the supplier.

5.3 Strapping package

5.3.1 Steel tubular products with an outer diameter greater than 159mm or special-shaped steel tubular products with a cross-sectional perimeter greater than 500mm can be delivered in bulk (single package). Other steel tubular products are recommended to be bundled and packaged for delivery.

5.3.2 Bundles of steel tubular products shall be bound firmly with strapping materials.

5.3.3 Each bundle shall be steel tubular products with the same batch number (except those approved by the product standard).

5.3.6 The number of bundles for each bundle of steel tubular products shall comply with the requirements in Table 2.

5.3.7 When binding steel wires, each pass shall be twisted into at least 2 strands. Increase the number of steel wire strands per pass according to the increase in the outer diameter of the steel tubular product and the weight of each bundle of steel tubular products.

5.4 Container packaging

5.4.1 Agreed by the supplier and the purchaser and indicated in the contract, cold-drawn or cold-rolled seamless steel tubular products with a wall thickness not greater than 1.5mm, electric-welded steel tubular products with a wall thickness not greater than 1mm, surface-polished hot-rolled stainless-steel tubular products, and precision steel tubular products with a surface roughness (Ra) not greater than 3.2µm can be packaged in strong containers (such as iron boxes and wooden boxes).

6.1 General requirements

6.1.1 The marks of steel tubular products shall be eye-catching and firm. The handwriting shall be clear, standardized, and not easy to fade.

6.1.2 Steel tubular products with an outer diameter not less than 36mm shall be marked one by one. Steel tubular products with an outer diameter less than 36mm may not be marked one by one. Steel tubular products used for galvanizing and special-shaped steel tubular products with complex cross-sections do not need to be marked one by one.

6.2 Marking content

6.2.1 The content of the mark shall at least include: the name or trademark of the manufacturer, product standard number, steel designation (for the composite steel tubular product, it shall also include the designation or code of the cladding material), size specification and traceability identification number. For steel tubular products with a high degree of finishing, the main performance indicators and dimensional accuracy levels can be added.

6.3 Marking method

The mark can be printed, stamped, roll printed, printed, pasted with a mark or pasted (hanging) a label, a hang tag. The supplier can choose one or more marking methods.

6.4 Label or tag

6.4.1 Each bundle of bundled steel tubular products marked one by one shall be attached (hanged) with at least one label or tag. For other bundles of steel tubular products, at least 2 labels or tags shall be attached (hanged) to each bundle. The label or tag shall at least include:

6.4.2 or steel tubular products and tubular product joints packed in containers, a label or tag shall be attached in the container. A label or tag shall be pasted (hanged) on the outer end of the container. The content on the label or tag shall comply with the provisions of 6.4.1.