T/TISA 004-2024 Active Group standards

T/TISA 004-2024 Purifying colored coated steel belt

Publish Date: 2024-12-30 Implement Date: 2025-04-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: T/TISA 004-2024

Standard Type: Group standards

Standard Status: Active

is_force_gb: no

CCS Name: -

ICS Name: Flat steel and semi-finished products

Publish Date: 2024-12-30

Implement Date: 2025-04-01

Scope

Main technical contents: 1. Coating color difference: This section stipulates that the E-value of the coating's color difference from the standard color plate should not exceed 0.5. The standard color plate shall be confirmed by both the supplier and the buyer at the time of ordering. The national standard GB/T12754 requires that the E-value of the coating's color difference from the standard color plate should not exceed 1.5. By comparison, this standard sets stricter requirements for color difference control than the national standard GB/T12754. This is to further control the color difference range to meet the production and processing requirements of color-coated steel strips for purification applications. 2. Surface quality: This section stipulates that for steel coils, since it is not possible to remove defective parts, the steel coils can be delivered with defects, but the defective parts should not exceed 1% of the total length of each coil. The national standard GB/T12754 requires that the defective parts should not exceed 5% of the total length of each coil. By comparison, this standard sets stricter requirements for surface quality control than the national standard GB/T12754, further limiting the proportion of total defective length to better meet the high-quality requirements of users of color-coated steel strips for purification applications. 3. Requirements for color-coated steel substrates: This section stipulates that according to customer and market needs, the coating weight can be agreed as follows: for hot-dip galvanized substrates, it should not be less than 50 g/m2; for hot-dip aluminum-magnesium alloy substrates, it should not be less than 20 g/m2. It can also be agreed in accordance with the national standard. This is to meet the widespread market requirements. Since color-coated panels are used indoors, considering customer needs and cost considerations, it is more practical to agree on a coating weight requirement lower than the nation