Strainstall - Stress Analysis and Load Monitoring

For over 25 years, major offshore installations have depended on Strainstall on-site services for load, stress and strain monitoring and data analysis. From basic stand-alone mooring load monitoring to comprehensive fully integrated systems which monitor vessel draft and ballast, metocean conditions, vessel loading and structural dynamics, Strainstall offers turnkey capabilities. Experienced in ABS, DNV and Lloyds certification requirements, we have the knowledge required to offer our customers the highest quality and the most dependable systems available.

STRUCTURAL MONITORING

We supply and install sensors to monitor stress and strain in offshore structures, flare stacks, risers, pipelines, adapters, fixed and floating units. With real-time displays and off-line data analysis from strain gauges, accelerometers, thermocouples, oceanographic and meteorological instruments.

CUMULATIVE FATIGUE DAMAGE MONITORING

Strainstall design, manufacture and install monitoring systems that provide advance warning of impending failure due to fatigue. They can be designed for unattended operation, and remote data access - ideal for installations where access is limited or expensive. Systems are suitable for both safe or hazardous area use, due to the in-built intrinsically safe characteristics.

HAZARDOUS AREA INSTRUMENTATION

Products include intrinsically safe Ex i(a), explosion proof (Ex d) technologies and encapsulated (Ex m) products, all of which are supplied with the appropriate certification. Intrinsically safe sensors include:

• Accelerometers
• Strain gauges
• Anemometer
• Amplifier (Zone 1)

CRANE INSTRUMENTATION

Strainstall manufactures a comprehensive range of crane weighing and overload protection systems to suit different requirements. From simple displays to PC-based systems with dynamic sea state load charts, equipment may be fitted either to new cranes or retrofitted to existing cranes. Each system comprises a load cell to sense the load monitoring cell and an indicator to display the load and any control outputs that may be required.

MOORING WINCHES

Strainstall offer a range of systems for winch load monitoring that measure line tension, speed and line out, mode of operation, control parameters and facilitate emergency release. Real-time winch and anchor line data is provided during ring positioning and mooring, utilising strain gauged load cells to supply accurate measurement. Configurations range from basic stand-alone local winch monitoring packages to comprehensive mooring load monitoring and control systems.

TENDON AND RISER LOAD MONITORING

Submersible load monitoring of tendons and risers of TLPs. Monitors jackets, cranes, flare stacks, risers, pipelines and adapters, ship hulls, decks and other related structures. Strainstall provide on-site structural monitoring and analysis, offering a complete service from design, through to installation. Applications from a few strain gauges to multi-channel dynamic data acquisition turnkey systems are available.

STRESSES IN RISER SYSTEMS

Strainstall design, manufacture and install riser stress-monitoring systems to provide an indication of riser tension, including warnings of riser disconnection from the fixed seabed equipment. All monitored data is channelled topside via umbilical or fibre-optic cables. The systems are suitable for use in deep-sea environments, measuring the stresses present at the specified strain gauge positions, during operations at water depths of up to 3,000m.

ANCHOR LEG LOAD MONITORING

Provides real-time data on mooring tensions for all types of production vessels, including turret and conventional spread mooring installations. Load measurement in achieved by using instrumented load pins, which are installed in the anchor legs using custom connection hardware. The system is capable of monitoring multiple channels simultaneously and provides a broad selection of archiving and analytical capabilities.

LOAD CELLS

Provides the basis of all our load measurement systems. Our speciality lies in our ability to customise load cells to any application and to measure any load imposed in tensile, compression, sheer or torque.