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  1. adilmn

    Corrosion on Hot fuel gas

    I am not looking for a Failure analysis from the lab. My concern to know more about the chance of hot gas condensation at low point sections. What are the reason may behind the hot gas condensation. As i mentioned, line is on service from last 10 year and low point section experienced with...
  2. adilmn

    Corrosion on Hot fuel gas

    Thank you Mr.Dhurjati Sen for your reply. 1. How old is this corrosion issue? Is it a recent phenomenon or did it start right from commissioning, etc.? One year before i have experienced same corrosion and leak which was replaced with new pipe spool. Now again the same location affected with...
  3. adilmn

    Corrosion on Hot fuel gas

    Good Day Gents, One of the Hot gas line(2" Fuel gas) in my plant getting corrosion and leak continuously where there are low points. Externally pipe surface is in good condition and no thickness reduction. But it experienced localized corrosion on some location where there is low points. Even...
  4. adilmn

    support welding directly to the pipe surface

  5. adilmn

    support welding directly to the pipe surface

    As racookpe1978 says, movement restriction is not affecting with the installed support since the clamp base plate is freely resting on the I beam and just locked with stopper to avoid the axial movement. If there will be any expansion or contraction ,it can move longitudinally. If we make an...
  6. adilmn

    support welding directly to the pipe surface

    Hi, I think as per the standards/practice, It was not allowed to directly weld any structural part to the pipe surface. but there was some U clamp found with the tack weld to pipe surface against the design document. Can any one help me to identify the impact of such welding with the pipe grain...
  7. adilmn

    Hydrojetting pressure calculation for Exchanger

    Yes regarding the cleaning process only. We had an exchanger with Crude service need to be cleaned by hydro jetting.Tube thickness is 1.6MM only and I have to calculate the suitable pressure for the same. how can I proceed the cleaning with hydo jetting.
  8. adilmn

    Hydrojetting pressure calculation for Exchanger

    Dear Friends, Could you please help me to get the reference for calculating the hydro jetting pressure in heat exchanger. What are all the factors which we have to consider and on which code it is clearly specifying. I had gone through API 660 and I couldn't find any relevant data. Please help...
  9. adilmn

    R stamp requirement for Exchanger

    Thanks for your valuable information. Even though still I had some doubt.As I understood, repair carrying out on the pressure part only we required R stamp, So how we can correctly define the pressure boundary. What about Tube plugging or re tubing which will comes under the R stamp requirement...
  10. adilmn

    R stamp requirement for Exchanger

    Dear friends... we Had one tubular heat exchanger with the partition plate passing and the procees is directly passing from inlet to out let(First pass- Fourth pass.It was identified as the partition plate on the head is not having enough length to hold the gasket and there is gap observed with...
  11. adilmn

    WPS for Pipe to Forged valve

    Ya Thanks for the reply.. Is there any particular concern on the pre heat of the duplex steel.The current WPS is having thickness 5.54 mm(2") and pre heat is mentioned as 20degree c. while considering the joint with forging, any changes on the pre heat will consider?
  12. adilmn

    WPS for Pipe to Forged valve

    Hi Guys, There is one new concern arised that I have to submit separate WPS for the welding of pipe with the valve ie.Butt weld joint connection of pipe and fitting. Welding have to done with A-790-s32750(DUPLEX STAINLESS STEEL PIPE)and A182F55 (forged valve).I have submitted the WPS with P no...
  13. adilmn

    Hardness For SS-304

    Thank you all for your valuable information. Visual inspection and surface NDT was already done and found accepted.From the above conversation,I am understanding that there wont be any additional testing required..
  14. adilmn

    Hardness For SS-304

    Good morning, There is one incident happened in our site that 2" fuel gas line (ss304) get fired due to excess temperature than allowed and need to check the integrity/micro structure change of the material through hardness. From where can i get the brinel hardness reading for SS304? What is...

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