LPG survey, Hull Thickness Measuring, Moisture Measurement




Partial Survey

LPG Survey

  • Is your LPG installation new to you and you want assurance that it is correctly installed?
  • Would your Insurance company like to see a survey or give a reduction with an LPG certificate?
  • Would you like to be sure about its safety?
  • In all cases, a Hiswa LPG Survey is the answer, it includes pressure testing, survey of the outside and all of its components, and a check on whether it is still compliant with today’s standards.
    Price of a LPG Survey: € 180 

    Hull Thickness Measuring

    Measuring the hull thickness of a vessel built of metal is important. Due to corrosion a vessel can lose thickness and finally the integrity of the hull might be endangered, let alone your safety. We use a Thickness Gauge which can measure through layers of paint, so no paint removal is necessary. You receive a written report which includes the measurements taken with the gauge. These thickness measurements are part of the complete survey when conducting a pre-sale survey of a metal hull.
    Price of a Hull Thickness Measurement: € 40 /meter up to 10 meters > 10 meters € 50 / meter.

    Moisture Measurement of a GRP Hull

    Of course you have heard some stories about Osmosis.
    Whatever the consequences can or will be, there is some agreement on the commencement of Osmosis,
    the more moisture present in a GRP laminate, the higher the risk of osmosis. This doesn’t necessarily include the visible signs of osmosis being present.
    An ultrasonic moisture measurement of the laminate together with my interpretation of the data revealed thereby and other factors such as: year of build, thickness of material, kind of material etc. gives you a clear view of the moisture content of your underwater hull.
    When conducting a pre-sale survey of a GRP hull, this measurement is part of the complete survey.
    Price of a Moisture Measurement; € 30 /meter up to 10 meters > 10 meters € 40 / meter.

    DC Stray Current Survey

    Electrolysis; every vessel in the water suffers from it, but luckily most of them don’t suffer the nasty aspects that can occur. If, perhaps, your anodes are completely depleted in about 4 months of submersion or less, and, given the fact that you’ve installed the right sized and sufficient anodes, there is probably an electrolysis problem. Anodes are meant to be sacrificed, but not too fast.
    Maybe the problem started with the AC current and the pontoon, but more often than not it is a 12 volt stray current causing you sleepless nights. To detect these small current(s) Tom Dujardin has the equipment needed to reveal them. Where the problem exists, we only conduct this survey with vessels equipped with conventional rudder/propeller-shaft lay out.
    Price of a DC Stray Current Survey; starting at € 300 /part day, with a minimum of one part day.
    To be able to conduct this survey, the vessel must be in the water.



    Pre-sale Survey
    Follow-up Advise
    Damage Survey