CB/T 3854-2025 in English

VALID

Ship's eye ring

Issued on:2025-04-10
Implemented on:2025-11-01
File Format:PDF
Delivery:Via email within 1~3 business days

Price(USD)： $225.00
$219.00

Standard No:	CB/T 3854-2025
Document status:	VALID
Title in English:	Ship's eye ring
Title in Chinese:	船用眼环
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 1~3 business days
Issued on:	2025-04-10
Implemented on:	2025-11-01
ICS Classification:	47.020.50-Deck equipment and installations
Chinese Classification:	U24-Marine installations
Professional Classification:	CB-Watercraft
Related Keywords:	eye ring introduction background open-air areas triangular eye ring n series stainless steel eye strength verification method take a2.0g type eye ring equivalent stainless steel

Introduction

Background of Standard Revision and Technological Evolution

CB/T 3854-2025, as a mandatory standard for the shipbuilding industry, inherits the CBM 2016 standard system in 1981 and has been revised twice, namely GB 7030-1986 and CB/T 3854-1999. This revision focuses on responding to the new requirements of the International Convention for the Safety of Maritime Safety (SOLAS), and the main technological breakthroughs are reflected in:

Comparative analysis of core changes

Comparison dimensions	1999 version	2025 version	Technical significance
Material range	Carbon steel only	Added 06Cr17Ni12Mo2 stainless steel	Improved corrosion resistance in marine environment
Structural types	7 types	Optimized to 4 types (A/B/C/D)	Simplified production system
Load level	0.5-5.0tf	Expand triangle to 1.2tf	Adapt to the needs of new ships
Surface treatment	Unspecified	New hot dip galvanizing/passivation process requirements	Comply with PSPC coating standards

Interpretation of key parameter specifications

1. Material requirements

The standard strictly distinguishes the material standards of U-ring/O-ring (25# steel or 06Cr17Ni12Mo2 stainless steel) and base plate (Q235B or equivalent stainless steel), among which:

Stainless steel parts must comply with GB/T 3280-2015's pitting resistance equivalent PREN ≥ 35 requirement
carbon steel forging yield strength ≥ 235MPa (GB/T 700-2006)

2. Strength verification method

Take A2.0G type eye ring as an example, it is necessary to carry out a 39.2kN (4tf) load holding test for 5 minutes on a universal testing machine. The deformation detection requirements are:

Permanent deformation rate ≤ 0.2%
No visible cracks in the weld (detected with a 20x magnifying glass)

Implementation suggestions

Key points for design selection

Ballast tanks should preferably use N series stainless steel eye ring (such as A2.0N)
It is recommended to use hot-dip galvanizing + shop primer double protection (film thickness ≥145μm) for open-air areas
Triangular eye ring is suitable for lateral force scenarios (such as lifeboat racks)

Key to quality control

Weld inspection: X-type grooves require 100% magnetic particle inspection
Dimension tolerance: focus on controlling the flatness of the bottom plate (≤2mm/m)
Marking specification: steel stamp depth ≥0.5mm and avoid the force area

More samples: JC/T 2453-2018 JGJ 94-2008 DL/T 5154-2012

Sample only — not a preview of CB/T 3854-2025