I have just had an Eddy Current Inspection Carried out on some structural welds in a crane pedestal. There was 10.0mm crack reported in 2002 (before my time with the company) this was never verified with MPI and the NDT tech did not mark the location. During the subsequent years no one was...
The company I work for has had a refridgeration skid designed & buit by a vendor. The condenser design seems a bit unusual to me. The tubes are designed to 15barg pressure and the shell side is designed to 30barg. The wall thickness of the tubes appears to be within the stress limits. But...
Luis
Your review is correct, the damage was not caused by CUI just atmospheric corrosion, the line is in the roof area of a process module.
in order to carry out repair welding I am just as quick to replace the spool piece as the system would still require shuting down purging building...
I have a 12" dia 10.0mm WT gas line operating at 10barg, there is a Thread-o-let branch connection to a bleed valve, the branch is 1" SCH 80 and has been found to have severe external corrosion damage, Radiography has calculated the remaining WT to be approximately 1.5 to 2.0mm from the thread...
I have a pressure vessel that has corrosion damage on the sealing face. The flange face damage is not severe enough to warrant a replavement flange, we are planning on welding ou the corrosion damage and machining the face,
The fabrication company have provided a weld procedure for V butt...
I have a pressure vessel that has corrosion damage on the sealing face. The flange face damage is not severe enough to warrant a replavement flange, we are planning on welding ou the corrosion damage and machining the face,
The fabrication company have provided a weld procedure for V butt...
The vessel contained gas condensate at the time, not normal conditions and was at 5barg and ambient temp. This vessel should not have contained the condensate, this was introduced by error!! the process system tripped and the system blew down and in a sudden depressurisation the vessel...
I have a 30 year old pressure vessel constructed from BS-150-151-28A plate. The vessel is in good condition and is still at nominal wall thickness of 19.0mm.
During an operational upset the vessel was subjected to a temperature of -14 degrees C, it was only at this temperature for 10 minutes...
I am surprised to hear that TOFD is proving very slow and you are considering a Linear accelerator to speed things up. TOFD is ususally much faster than Radiography.
The use of this type of X-Ray unit would normally require the vessel to be sited in an exposure bay designed for use with the...
JR97
The tech had reported a local area of thinning ie 3.0mm less than the rest of the vessel, that is what lead us to believe that there was either an area of disbondment or we had lost the linning in that location.
The vessel was full of water during the original inspection and also the...
Are you running a Risk Based Inspection strategy? Your frequency of inspection will be dependant more on the number and extent of any repairs, the service conditions, degradation mechanisms, liklihood and consequence of failure etc rather than just the age of the vessel.
I have been through extensive CUI campaigns on our offshore platforms over the past 10 years and the reliability of NDT techniques to detect CUI is questionable.
The radiographic techniques are very good, but time consuming, expensive and have their own inherent safety issues.
Long range...
Steve
The base metal is Superelso 500 and the CE is between 0.4 & 0.45 and the 3mm clad 904l. The cladding was subjected to the PWHT. The degradation of the cladding by the PWHT process is minor in terms of the corrosion resistance requirements.
I am the certifying authority and as such am...
The vessel is NACE MR0175 compliant, there are no other specific hardness requirements. The vessel design code is British standard BS 5500 Cat 1.
One of our Metallurgists is happy with the weld procedure described above due to the small area to affected and that the area will be filled with...
I have a carbon steel 75.0mm thick pressure vessel with a 3.0mm 904L overlay. Internal inspection has revealed a pit defect in the overlay with a diameter of 5.0mm and a maximum depth (taking account of measurement uncertainties) of 2.5mm.
The vessel was heat treated during construction.
I...
