T/HQPA 6-2022 Abolished Group standards

T/HQPA 6-2022 Grade protection pipeline fusion-bonded powder outer coating technology specification

Publish Date: 2022-02-23 Implement Date: 2022-02-23 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/HQPA 6-2022

Standard Type: Group standards

Standard Status: Abolished

is_force_gb: no

CCS Name: Material protection

ICS Name: Other processing and plating

Publish Date: 2022-02-23

Implement Date: 2022-02-23

Scope

Scope: This document specifies the requirements for the external coating of steel anti-corrosion pipes with fused powder (hereinafter referred to as "coating"), the coating application process, inspection rules, product marking, packaging, transportation and storage, and the safety, hygiene and environmental protection of on-site joint repair and coating application. This document applies to the production, inspection and construction of steel anti-corrosion pipes with fused powder external coating for outdoor gas use with a nominal diameter of ≥15 mm and an operating temperature of -30℃ to 100℃. Other working conditions can be referenced for implementation. Main technical contents: 1) The "Technical Specifications for External Coating of Steel Anti-Corrosion Pipes with Fused Powder" specifies two product structures, namely single-coat and double-coat anti-corrosion, which meet the market demand to varying degrees; 2) The artificial accelerated aging test of single-coat external coating anti-corrosion can meet the outdoor use index of 800 hours in HG/T2006-2006 standard; the artificial accelerated aging test of double-coat external coating anti-corrosion can meet the three-layer fused powder anti-corrosion index of 1200 hours in GB/T37594-2019 standard; 3) The thermal characteristic test clarifies the inspection of the base layer; 4) Systematic clear requirements are made for the performance indicators of powder coatings; 5) The factory inspection items and sampling frequency of external coating anti-corrosion pipes are clearly specified.