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CB/T 4561-2025J type marine cylindrical observer (English PDF)

J类船用筒形观察器

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Issued by

Ministry of Industry and Information Technology of the People's Republic of China

Level / Type

National · Recommended

Issue date

April 10, 2025

Implementation date

November 1, 2025

Scope

CB/T 4561-2025 is the English-translated version of J类船用筒形观察器.

CB/T 4561-2025 — This standard specifies the classification and marking, requirements, test methods, inspection rules, marking, packaging and storage of J-type marine cylindrical sight glasses.

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Document preview — CB/T 4561-2025

National Standard of the People's Republic of China

ICS: 47.020.30
Classification: U 55
Replacing: CBM 1105-1982

Issued by: Ministry of Industry and Information Technology of the People's Republic of China

What this standard covers1
Document data2

What this standard covers

This standard specifies the classification and marking, requirements, test methods, inspection rules, marking, packaging and storage of J-type marine cylindrical sight glasses. This standard is applicable to overflow Design, manufacture and acceptance of cylindrical viewer for pipeline water and oil medium

Document data

International classification (ICS): 47.020.30.

Chinese classification (CCS): U55.

Estimated length of the Chinese original: 8,829 words.

Supersedes the earlier edition CBM 1105-1982.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 6 pages — is available in the English PDF.

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