HG/T 21633-2024Standard for Selection of fiber glass pipe and fitting (English PDF)

HG/T 21633-2024 is the English-translated version of 玻璃钢管和管件选用规定.

HG/T 21633-2024 is the Chinese chemical industry standard for selecting glass fibre reinforced plastic (GRP, fibreglass) pipes and fittings for chemical plants.

It covers pipes and fittings from DN25 to DN4000, pressure ratings from 0.25 MPa to 4.0 MPa (CLASS 75 to 300) and design temperatures from -35 °C to 110 °C, and sets out the general principles, terms, basic requirements and selection requirements, dimensions, connection methods, inspection and testing, marking, packaging, transportation and storage.

Issued by the Ministry of Industry and Information Technology on 5 July 2024, it replaces HG/T 21633-1991 and has been in force since 1 January 2025.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — all pages — is available in the English PDF.

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