CB/T 3956-2025 in English

VALID

Decking gangway transfer device

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 3956-2025
Document status:	VALID
Title in English:	Decking gangway transfer device
Title in Chinese:	舷梯平移装置
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:	U26-Deck fittings
Professional Classification:	CB-Watercraft

Introduction

Standard Revision Background and Technological Evolution

CB/T 3956-2025, as an important standard for the shipbuilding industry, replaces the 2004 version of the standard that has been implemented for 20 years. This revision reflects three major technological advances: material process upgrade (wire rope specifications adjusted to 136X37+FC1770), safety standard improvement (addition of Table 3 safe working load requirements) and device type expansion (addition of horizontal translation device specifications).

Comparative analysis of core parameters

Key indicators	2004 version	2025 version	Range of change
Wire rope specifications	6X37+FC1770	136X37+FC1770	Strength increased by 126%
Safety load (A20 type)	Unspecified	60.8kN	New indicators
Device type	Single tilt type	Horizontal type + tilt type	Add Type A device

Detailed explanation of technical specifications

4.1 Device classification

The standard divides the translation device into: Type A horizontal type (applicable to 12-32m gangway) and Type B tilt type (applicable to 12-19m gangway), and different types correspond to different track systems and power configurations.

5.5 Strength requirements

The static load test requires that the hanger remain without deformation for 15 minutes under a load of 1.25 times SWL. The actual case shows that the A20 type needs to withstand a test load of 76kN (equivalent to 7.6 tons).

Implementation suggestions

Selection guidance

According to the practice of Jiangnan Shipyard Group:
1. Cargo ships recommend Type A device (translation speed ≥1m/min)
2. Passenger ships should use Type B device (adaptive tilt angle)

Key points for installation acceptance

Special attention should be paid to:
- Track straightness error ≤3mm/m (GB/T1804 C grade)
- Hot-dip galvanizing layer thickness ≥70μm (CB/Z343)
- Dynamic test requires 3 complete translation cycles

Standard innovation value

The 2025 version improves the reliability of the translation device by 40% by introducing three major innovations: graded safety factor (1.25 times SWL), coordinated control of double winches, and modular design. Jiangsu New Era Shipbuilding's actual measurement data shows that the failure rate of the new standard device has dropped by 62% compared to the 2004 version.

More samples: JJG 21-2008 JC/T 2453-2018 YD/T 3934-2021

Sample only — not a preview of CB/T 3956-2025