Pipeline Installation Support

The pipeline installation support system is a comprehensive term for a set of steel structures and supporting equipment for the installation of offshore pipelines, risers, hoisting, positioning, monitoring, and protection. It includes installation fixtures, positioning supports, underwater monitoring equipment, and temporary protective structures, providing precision control, safety protection, and attitude stability guarantees for the entire process of offshore pipeline transportation, launching, laying, and connection. 

Application Scenarios

1. Underwater pipeline laying operations ranging from shallow water to ultra-deep water (up to 1500 meters), compatible with mainstream pipe-laying techniques such as S-lay and Reel-lay;

2. Installation of offshore risers, positioning, and fixation construction, including temporary supports and installation of permanent guiding structures;

3. High-precision underwater assembly of complex components such as large pipeline terminals (PLEM/PLET) and manifold assemblies;

4. Pipeline positioning, anti-sedimentation, and anti-drift protection in complex sea conditions and rugged seabed areas;

5. Intelligent operation scenarios for the entire pipeline installation process, including attitude monitoring, stress detection, and real-time monitoring of mud landing points. 

Main Structure

1. Installation of fixtures: Pipeline hoisting equipment, support brackets, underwater guiding frame, underwater对接 fixture, stabilizing winch system, disposal and recovery winch, etc., all steel structures；

2. Positioning and fixation structure: Pipeline support piers on the seabed， limit clamps， anti-sedimentation baffles， vertical pipe guiding brackets；

3. Monitoring supporting equipment： Unmanned vessels equipped with USBL positioning system， sonar， stress sensors， and underwater robots such as ROV/AUV, as well as communication relay equipment, to achieve real-time monitoring of pipeline posture and position；

4. Temporary protective structure： Pipeline transportation protective planks， temporary anti-corrosion protection covers during construction， weld seam protection fixtures. 

Corresponding Product Standards

1. Steel Structure Manufacturing Standards: NORSOK M-101 "Steel Structure Manufacturing", EN 10225 "Seawater-Suitable Structural Steels"

2. Offshore Construction Standards: DNV-RP-0317 "Recommended Specifications for Offshore Pile Foundations and Pipeline Construction", ISO 12813 "Safety Standards for Offshore Steel Structures in Construction"

3. Inspection and Positioning Standards: ISO 19901 "General Design Guidelines for Offshore Structures"

4. Welding Standards: AWS D1.1, ISO 17660 "Steel Structure Welding Specifications"