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GB/T 36884-2026Ships and marine technology - Ship��s mooring and towing fittings - Recessed bitts (casting type) (English PDF)

船舶与海洋技术船舶系泊和拖带设备舷内带缆桩（铸造型）

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Issued by

State Administration for Market Regulation

Level / Type

National · Recommended

Issue date

July 30, 2026

Implementation date

November 1, 2026

Scope

GB/T 36884-2026 is the English-translated version of 船舶与海洋技术船舶系泊和拖带设备舷内带缆桩（铸造型）.

GB/T 36884-2026 is a Chinese national standard in the series on ships and marine technology, covering mooring and towing fittings, here recessed bitts of the casting type.

It specifies the type, nominal dimensions, sizes and materials of recessed bitts that meet normal towing requirements, along with their structure, manufacture and marking requirements.

Its contents include the safe working load, which is the maximum permissible load for mooring and towing equipment, classification by type and nominal dimensions, and sizes.

Compared with the 2018 edition, the scope and the safe working load definition were changed, and Appendix A is now normative. Issued on 30 July 2026 and applicable from 1 November 2026, it replaces GB/T 36884-2018.

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Document preview — GB/T 36884-2026

National Standard of the People's Republic of China

ICS: 47.020.50
Classification: U 21
Replacing: GB/T 36884-2018

Issued by: State Administration for Market Regulation

Foreword
1 Scope
2 Normative references
4 Classification
5 Size

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents".

This document replaces GB/T 36884-2018 "Ships and Marine Technology - Mooring and Towing Equipment for Ships - Inboard Bollards (Cast)".

Compared with GB/T 36884-2018, the main technical changes in the revised standard (type) are as follows, except for structural adjustments and editorial modifications.

a) The scope has been changed (see Chapter 1, Chapter 1 of the 2018 edition);

b) The definition of the term "safe workload" has been changed (see 3.1, 2018 version 3.1);

c) Appendix A has been amended to be normative (see Appendix A, Appendix A of the 2018 edition);

This document is equivalent to ISO 13799:2020 "Ships and Marine Technology - Mooring and towing equipment for ships - Inboard bollards (cast)" type)".

1 Scope

This document specifies the type, nominal dimensions, dimensions, and materials of inboard bollards (cast type) that meet normal towing requirements, as well as their structure. Manufacturing and marking requirements.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included.

For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies. This document. and mooring equipment) The following terms and definitions apply to this document.

3.1 Safe working load

The safe load limit (maximum permissible load) for mooring and towing equipment

4 Classification

4.1 Type

Based on the size and strength of the material, inboard bollards (cast type) should be classified into the following 6 types.

a) Type 75.Nominal size 850, casting material yield strength not less than 235 N/mm²;

b) Type 110.Nominal size 850, casting material yield strength not less than 350 N/mm²;

c) Type 135.Nominal size 850, yield strength of casting material not less than 430 N/mm²;

d) Type 100.Nominal size 920, casting material yield strength not less than 235 N/mm²;

e) Type 150.Nominal size 920, casting material yield strength not less than 350 N/mm²;

f) Type 180.Nominal size 920, yield strength of casting material not less than 430 N/mm².

4.2 Nominal Dimensions

The nominal dimensions of the inboard bollard (cast type) are determined with reference to the outer diameter of the bollard, in millimeters (mm).

The nominal dimensions of the inboard bollards (cast type) are 850 and 920.

The specifications and parameters of the inboard bollards (cast type) shall conform to the provisions of Table 1, Table 2 and Figure 1.

5 Size

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 7 pages — is available in the English PDF.

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