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Is the electric heater an internal component of the pressure vessel? The code boundary of your pressure would end at the face of the flange the heater is bolting too. In question no. 2 did you intend to say sec. VIII? At my facility we have flanged tubular heaters that bolt up to various sec...

The manufactures data repot for the steam drum should tell you the code of construction. If you do not have one on file and the drum has an original manufacturers data plate you could get a report from the National Board.

Is this tower in a sulfur recovery unit in an oil refinery? This is a first for me, but I have not been around long. I am assuming the liner starts above your feed tray. If it is in good condition I would leave it as is. I would recommend a good inspection of the liner consisting of visual and...

What is the wall loss mechanism? If it is erosion you have a few other sacrificial steps to consider. Weld an impingement plate to the shell after restoration. This sacrificial element is seen often on heat exchanger bundles. If it is a dry particulate you could weld hex anchors to the shell and...

Can anyone point me in the direction of some information of welding electrode storage requirements? I am currently looking over a proposed procedure for filler metal identification, storage, and handling and need something to verify the data against. An example of the data being verified is the...

I’m not sure what the accessibility is to the component in question, or what the process media is but here are a few things that come to mind. If your thinking of using a smart pig then I assume putting water in this tube is ok. This may sound odd, but I just thought of it. If you have access to...

I have tried the ES plugs. If you are going to use them you want to assure your tube is clean. They use small wire brushes that fit inside the tube to clean the floating end side of the tube, but they do not work to well. Depending on the success of you cooling water treatment program this...

Also to add to metengr's reply if you are working to ASME 8 your joint efficiencies will be less if you remove the backing strip and do not grind / gouge to sound metal and weld out. You would also want to perform a dye penetrant, or mag particle inspection after grinding / gouging to inspect...

Thanks for all the help I will look into these courses.

Does anyone now of some good metallurgy training courses? I am a young API inspector wanting to educate myself in metallurgy and corrosion issues associated with the oil refining industry. I have 10 years refinery experience and am quite versed with API 571. I am also interested in refractory...

If it not too late you may think about removing the 410 sleeve and doughnut ring and go with an Inco A, or 182 overlay. I believe there are automatic welders that can handle 4” nozzles. Try GE welding. Another option is to remove the c/s nozzle and replace it with a 410 nozzle the overlay the...

Let’s assume we are talking about a specified flanged connection. If the dimensions of piping assemblies are not correct (say one of the straight runs of pipe was cut a little too short) there could be an excessive gap between the faces of the two flanges. My question is what would be the...

Thanks for the reply. I have seen that section in B31.1 it is pertaining to alignment of flanges and alignment of bolt holes. The measurement I am looking for is the allowable distance between the flange faces. At a minimum you would have to allow for the thickness of the gasket, and be assured...

Where would I find the maximum allowable distance between piping flanges prior to bolt up? This is assuming no spacer will be installed between the flanges. I know this is a matter of piping fit-up, but I need to know in what code and where I can find the maximum allowable distance. I first...

I have a FCCU Flue gas furnace that posses a superheater with SA-335 Gr P22 tubes. The tubes are 2.875” O.D. with a .218” thickness. This superheater had a tube failure during operation. The decision was made to by-pass the superheater rather than performing an entry to asses the damage. These...

Thanks metengr! When discussing this with the metallurgist I made sure he was implying that the stress relief has already occurred naturally over 4 years under ambient conditions. I have heard of certain situations were stress relief has been obtained during operation below the critical...

I have a piping system constructed of A106 carbon steel pipe. This piping is too constructed per ASME B31.1 piping code. The nominal thickness is greater than .750” thus requiring heat treatment per the code. This piping was constructed in the year 2000 and has not seen service. We have no...