Technical requirement of rigging application for offshore cranes
1Key Takeaways
This standard specifies the structural type, wire rope selection, rigging arrangement and rigging termination of offshore platform crane rigging. This standard is applicable to offshore platform crane rigging applications, and other offshore cranes can refer to it for implementation.
2Expert Interpretation
A detailed interpretation of the National Standard of the People's Republic of China GB/T 37444-2019, covering the structural type, wire rope selection, rigging layout and termination technical requirements of offshore platform crane rigging, with a comparison of the standard framework and implementation recommendations.
GB/T 37444—2019: Interpretation of Technical Requirements for Offshore Platform Crane Rigging
National Standard of the People's Republic of China GB/T 37444—2019 "Technical Requirements for Application of Offshore Platform Crane Rigging" is an important industry standard that aims to regulate the design, manufacture and use of offshore platform crane rigging. This article will provide an in-depth interpretation of the background, framework, technical requirements and other aspects of the standard, and provide professional advice based on actual application scenarios.
Background and Significance of Standard Formulation
With the rapid development of marine energy development, offshore platform cranes are key equipment, and their safety and reliability are directly related to operating efficiency and the safety of life and property of personnel. The introduction of GB/T 37444—2019 fills the gap in domestic technical standards for offshore platform crane rigging, and provides the industry with unified technical specifications and quality requirements.
Comparative analysis of standard frameworks
| Standard dimensions | GB/T 37444—2019 | Reference standard (API Spec 9A) | ISO 2408:2017 |
|---|---|---|---|
| Scope of application | Offshore platform crane rigging | Wire rope specifications for the petroleum and natural gas industry | General wire rope requirements |
| Technical focus | Structural type, wire rope selection, rigging layout and termination | Wire rope design and manufacturing requirements | Anti-rotation and wear resistance |
| Updated Features | Combined with the special requirements of the marine environment, new categories of dynamic and static cables are added | Focus on corrosion resistance | Strengthen safety factor requirements |
Technical Requirements Interpretation and Application Suggestions
1. Selection of rigging structure type
The structural type of rigging should be selected according to the layout of the crane's rope threading system, installation requirements and usage functions. Galvanized rigging is recommended to improve corrosion resistance. The selection of cable segments must comply with the CB/T4424-2015 standard to ensure that it matches the diameter of the wire rope.
2. Principles for wire rope selection
ISO 2408:2017 and API Spec 9A are the basic standards for wire rope selection. For the dynamic ropes of offshore platform cranes, it is preferred to use anti-rotation steel core types and avoid using fiber core wire ropes.
3. Rigging Arrangement and Safety Precautions
The maximum deflection angle of the wire rope around the pulley must comply with the requirements of Table 1, ensure that there are no less than 3 turns of wire rope on the drum, and use a reliable fixing method. The safety factor should be no less than 80% to ensure operational safety.
4. Technical Requirements for Rigging Termination
The installation of open cable sockets and wedge-shaped cable sockets must be strictly in accordance with the manufacturer's instructions to ensure that the connection efficiency is not less than 80%. The number and spacing of U-bolts and rope clamps shall comply with the provisions of Table 2 to ensure that the fixing strength is not less than 80% of the strength of the wire rope itself.