tag:blogger.com,1999:blog-2743933740211453331.post8624600576530623817..comments2024-03-14T05:26:47.372-07:00Comments on Expedition2010.Org Blog: International Air Pollution Prevention (IAPP) Certificate: USCG PerspectiveDouglas Pohlhttp://www.blogger.com/profile/09788593834449969596noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-2743933740211453331.post-21590634341530190282014-05-14T07:55:56.046-07:002014-05-14T07:55:56.046-07:00If a marine surveyor showed up to survey my steel ...If a marine surveyor showed up to survey my steel boat without an electronic instrument (hammer alone) I'd stop him and tell him that I require a higher quality of information than he came prepared to provide. Or in other words - you are fired!Douglas Pohlhttps://www.blogger.com/profile/09788593834449969596noreply@blogger.comtag:blogger.com,1999:blog-2743933740211453331.post-37948644579735830172014-05-14T05:02:21.176-07:002014-05-14T05:02:21.176-07:00General Principles of marine inspection companies
...General Principles of <a href="%E2%80%9D" rel="nofollow">marine inspection companies</a><br />The time-honoured way to test steel plating is by striking it with a hammer. The advantage of this test is<br />that it replicates a mild or moderate collision with flotsam, or a harbour wall, and so indicates whether<br />the stem, or plating or an A-bracket, or any vulnerable part, is strong enough to withstand this level of<br />impact. It is also an indication of how thick the steel is to an experienced <a href="%E2%80%9D" rel="nofollow">independent marine surveyor</a>. Hammer testing is<br />quick, reliable, inexpensive, repeatable, largely unaffected by survey conditions such as wet or windy<br />weather, and is good at establishing whether there is severe corrosion. Limitations include a lack of what<br />might be called “fine tuning” in that even a skilled surveyor can seldom detect such differences as 20%<br />or 40% rusting where the remaining plating still retains a good amount of sound steel. Hammer testing<br />is particularly useful down in the bilge where corrosion is common and often serious. Here it can be<br />difficult to get the steel surface clean enough to use an ultrasonic tester with confidence. Also there are<br />places so far down below the <a href="%E2%80%9D" rel="nofollow">cargo surveyor Dubai</a>that he cannot hold a sonic transducer against the steel, whereas<br />he can strike effectively with a long-handled hammer. This technique is also good in other locations such<br />as in a chain locker where access is poor but the plating or framing is within reach of a hammer with a<br />long handle. Another feature of hammer testing is its simplicity. With ultrasonics an unfailing source of<br />electricity is essential, not to mention calibrating, recording, adjusting, and so on. There is nothing so<br />“bomb-proof” as a hammer, in contrast to an electronic instrument. A limitation to hammer testing is that<br />it can seldom be used on well-painted steel without written permission from the owner or his<br />representative. Hard epoxy paint is likely to be damaged by serious hammering. Even moderately<br />unenergetic hammering will destroy the paint on steel as it chips away the covering right down to the base<br />metal and, as a result, building up a new paint coat has to start with flatting off the old paint and<br />beginning with new primer, right through coating by coating, to the final high quality continuous finish.<br />For more: http://www.marinesurveyordubai.com/marine-surveyor-dubai-why-us/<br />Anonymousnoreply@blogger.com