This product enquiry came from one of our regular customers; a UK based offshore engineering systems integrator. Generally, we supply them load pins, which are installed into shackle and link assemblies that already exist on site. On this occasion, they needed a complete solution, with full traceability throughout the manufacturing process.
The load cell was to be rated at 150te and was to be used to measure mooring tension. The design needed to withstand full submersion in seawater. Material and proofload certificates were required for the shackle. The shackle pin had to be manufactured from stainless steel. The pin required full traceability, with the final proofload, calibration and documentation to be inspected and witnessed by ABS (American Bureau of Shipping).
The main criteria we were given was as follows:-
|Rated Load (RL):||150 tonne|
|Proof Load:||225 tonne|
|Ultimate Breaking Load:||>650 tonne|
|Output:||2.2 mV/V nominally|
|Excitation Voltage:||10vdc recommended, 15vdc maximum|
|Insulation Resistance:||>500MΩ @ 500vdc|
|Operating Temperature Range:||-20 to +70°C|
|Compensated Temperature Range:||-10 to +40°C|
|Zero Temperature Coefficient:||<±0.01% of Rated Load/°C|
|Span Temperature Coefficient:||<±0.01% of Rated Load/°C|
|Environmental Protection Level:||IP68, submersible to 500psi|
|Connection Type:||Integral 6 way subsea Burton 5500 series connector, with mating hose protected cable assembly.|
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|The LCM3064 shackle load cell was designed using the vast experience that exists at LCM Systems in manufacturing custom design load cells to meet customer requirements, for use in harsh environments.
The LCM3064 also demonstrated our ability to meet the commercial requirements as well as the techncial requirements of our clients. By taking on the sourcing and supply of a shackle to fit various application constraints, it not only provided us with added value, but it also saved our client money. The savings were made in their time and also in consolidating the ABS witnessing to one overall product, rather than a seperate pin and shackle.
LCM Systems offer a wide range of standard shackle load cells and also have an extensive selection of custom design versions, which could also be used to satisfy other applications. Many of these products are supplied with our TR150 handheld battery powered indicator, with built in analogue signal conditioning,digital outputs or with wireless telemetry.
We have manufactured shackle load cells based on many different shackle manufacturers' products, including; Crosby, Van-Beest, GN Rope to name a few
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