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Applications Mooring Tension Measurement
Mooring Tension Measurement
Ports and terminals worldwide face the challenge of dealing with ever larger vessels and cruise ships. Also, due to climate change, more extreme weather conditions are having an impact on the levels of strain the mooring lines are subjected to. Strong wind, waves and currents mean that even when docked, ships are constantly in motion. This means the tension placed through mooring lines is changing all the time, contributing to material fatigue and reducing service life. Additionally, if one or several mooring lines experience higher tension levels than others, there is a real risk of the mooring line breaking, resulting in potential damage to the jetty and to personnel.
To ensure a vessel stays securely docked, the tension in each mooring rope must be subject to the same loading or tension, or as close to as possible. This can be achieved through the installation of a mooring tension measurement system, which continually monitors the loads on each mooring line, so that any instances of overload or underload can be identified immediately. Port operators can then alert vessel masters so that they can take prompt corrective action to evenly redistribute mooring line loads.
The mooring measurement systems that LCM Systems supply use either load measuring pins installed into quick release mooring hooks, or load shackles/load links that are installed into the mooring line structure and secured to existing port mooring facilities. The load measurement data provided is then usually fed into a PLC system, but a separate read out can be provided where appropriate (usually in smaller ports and harbours). This can also include alarms that are triggered in the event of overload situations.
Below is a selection of some of our most popular standard load cell and sensor based products used for Mooring Tension Measurement applications
LPB
- Custom design load pin
- Dimensions to suit application
- From 100 kgs to 1500+ tonnes
LPC
- Shackle/clevis load pin
- Ranges from 1te to 1500te
- Stainless steel construction
SHK-B
- Cabled bow type load shackle
- From 1 tonne to 1000 tonnes
- Environmentally sealed to IP67
TELSHACK-B-HL
- Wireless heavy lift shackle
- From 120 tonnes to 1000 tonnes
- GN Rope shackles
TLL
- 5te to 100te
- Stainless steel construction
- Environmentally sealed to IP67
WLL
- Wireless load link
- Stainless steel (17-4PH H900)
- Ratings from 5 to 100te
Below is a selection of our most popular standard instrumentation products used for Mooring Tension Measurement applications
DIS-323AL/SS ATEX
- Display for use in hazardous areas
- Loop powered
- +/-99999 display, 10cm high
LCA20
- Intelligent load cell amplifier
- 4-20mA/0-10V/RS232/RS485 outputs
- Autotare, peakhold and reset
LD-STRAIN
- Load cell input
- Digit height up to 16" (40.5cm)
- AC or DC powered
PMD-STRAIN
- Load cell input
- Wide selection of outputs
- 14.2mm high red LED display
SGA
- Strain gauge amplifier
- Load cell input
- Selectable voltage & current outputs
T24-ACM
- Wireless sensor transmitter
- Regulated external supply
- Powered by batteries for up to 5 years
T24-HS-LS
- Simple wireless handheld indicator
- Connects to a single acquisition unit
- Gross/Net weight facility
TR150
- Battery powered
- Handheld and portable
- Load cell input
X24-ACMi-SA
- Compact wireless sensor transmitter
- ATEX/IECEx Zone 1 & 2
- IP67 sealed enclosure
Below is a selection of some of our custom design product solutions used for Mooring Tension Measurement applications
LCM1410
- 55te Subsea Load Cell
- Installed in chain stopper
- Low Height (only 117mm high)
LCM1791
- SMP Mooring Line Monitoring
- For use with a 250te load shackle
- Suitable for use subsea to 200m
LCM3064
- 150te Subsea Load Shackle
- GN Rope H11 shackle
- Special anti-rotation bracket
LCM3511
- 85te Subsea Load Shackle
- Permanently submersible to 45 metres
- Greenpin G4153 Bow Shackle
LCM3782
- 85te Tonsberg Mooring Link
- Stainless steel load pin
- Mooring tension measurement
LCM4487
- Diving Bell Weight Verification
- 1000kN load pins
- Integral amplifier for 4-20mA output
LCM4550
- Pipe Laying Vessel Load Cell
- All load pins dual bridge
- Serial output direct to PC
LCM4570
- 12te Shackle and Data Logger
- Submersible to 4.5m
- 6 weeks unattended operation
LCM4823
- Telescope Tension Monitoring
- 100kN wireless load pin
- 600m transmission distance
What Mooring Tension Measurement Applications have LCM Systems already satisfied?
Please review some of the recent news items relating to Mooring Tension Measurement load cells, load pins and associated instrumentation that we have supplied to our customer base. These will help demonstrate the experience we have in finding solutions for our customers, in a addition to the standard product offering available for this application.
2nd Jun 2023
200te Load Pin for CALM Buoy Mooring Line Monitoring
This 200 tonne load pin, manufactured for a leading UK supplier of CALM buoy remote monitoring and control equipment, will be fitted into a load shackle and used for mooring line load monitoring on a single point mooring buoy.
20th Jan 2023
85te ATEX/IECEx Load Shackles for Mooring Application
Packed and ready for despatch are these 85te ATEX/IECEx certified load shackles, which will be used to monitor the loads in the mooring lines of an FSRU (Floating Storage and Regasification Unit).
29th Jul 2022
This 25te subsea load shackle has been despatched to a UK tidal turbine company. At their request it was designed to have no stainless steel components in order to minimise corrosion.
7th Jul 2022
These 285te load pins will be fitted into load shackles and used for mooring line load monitoring on a single point mooring buoy.
21st Apr 2022
Submersible Load Link With Data Logging
This stainless steel 8 tonne load link has been manufactured for a fish farm company in New Zealand, and will be used to monitor the tension in the mooring lines of large offshore floating fish tanks.
14th Apr 2022
Despatched this week and on their way to the USA are these two 1000 tonne rated load shackle pins.
2nd Nov 2021
8000N Annular Submersible Load Cell
We have recently supplied this 8000N load cell for deployment 80 metres subsea to measure the tension in the mooring line of an offshore wave power generation system.
14th May 2021
750 Tonne Load Pins for Anchor Load Monitoring
We have recently despatched an order for 40 ATEX/IECEx load pins, each rated to 750 tonnes with a diameter of 320mm and are 910mm long.
3rd Jul 2020
55 Tonne Wireless Load Shackles
On Thursday last week we received an order for five of our wireless 55 tonne TELSHACK-B load shackles, which were required urgently for a project in the Gulf of Mexico.
5th Jun 2020
ATEX/IECEx Load Pins for FLNG Production Vessel
Ready for despatch are these ATEX/IECEx certified load pins.
22nd May 2020
Despatched this week to a customer in Canada were these two X/Y 50kN stainless steel load pins.
21st Feb 2020
120te Load Pin for Mooring Bollard Load Monitoring
We are often asked to supply load pins to suit customer supplied load shackles from various manufacturers.
13th Dec 2019
Manufactured for a US customer and despatched this week were two of our 400 tonne telemetry load shackles.