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We are having to replace a section of bulb flat and I wondered if there was a specific weld bevel required. I have looked in "No.47 Shipbuilding and Repair Quality Standard" but although the order of welds and some weld bevel examples are given the weld bevels all refer to flat plates and not...

Thanks

My PU products are designed for temperatures below 40°C, however the Tg is only 50°C and I have reason to believe that they may reach temperatures of 50°C during storage prior to use if there is no intervention. Will the properties return to "normal" when they are cooled? Thanks Alison

Thanks everyone for taking the time to respond. Steve, I have the same interpretation as you for the dnv, and so my design fulfils the requirements, however, is it possible that the underside of my mudmats is shielded? (mudmats have holes for installation). ...And if it is shielded, how much...

I am designing subsea steel structures protected by an indium aluminium CP system. The structures are supported on mudmats which have their undersides and skirts buried in the soil. The area buries has not been painted but has been included in the CP calculation as defined by DNV. The...

Thank you :-)

I am assuming Duplex 2205, but this hasn't yet been finalised and can be changed. Pitting by seawater. There will be biocides and oxygen scavenger, but the flooding is carried out during installation of the flowline so the distribution is not guarenteed. Also the flowline will opened...

I have been given conflicting information on the time that Duplex may be resistant to pitting: one source says 7 days, and the other several months. My pipes may be exposed to some seawater content for 2 to 3 months (most of the content will be treated with oxygen scavengers, but the...