Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations TugboatEng on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Recent content by deco0404

  1. deco0404

    Different interpretation of points in EN standards

    Hi Guys, We have a bit of an issue regarding the interpretation of a single point in an EN standard. The detail for now in unimportant, but what I would like some clarity on, or reference to is the following. It was always my understanding that if something could be interpreted from an EN...
  2. deco0404

    Qualifying a WPS from multiple PQR's

    Thanks for the post Don, very helpful. This probably should be part of another thread, but how can this be controlled. What I mean by this is that differently qualified procedures will use different weld settings, and most importantly different heat inputs...Is there any way to tell whether by...
  3. deco0404

    Qualifying a WPS from multiple PQR's

    Hi guys, hope someone can offer some advice here. What I would like to know is if there is a limit to the amount of PQR's which can be used for a single WPS? We are doing a project for the offshore sector, and have recently had a contractor who had quite a complex weld to do. In their WPS they...
  4. deco0404

    Very Curious Weld Defect

    Hi DD I have been informed that the repair was done with GTAW. I cannot guarantee this though. The GMAW is the manufacturers standard welding mode. It is definitely not SMAW. The loss of shielding gas is a possibility, but I still perfer the idea of the draught just sucking the molten weld metal...
  5. deco0404

    Very Curious Weld Defect

    no, it was just in this location, but this is a rewelded location after a previous weld repair.....
  6. deco0404

    Very Curious Weld Defect

    Hi Andrew, There is no pressure, but there could possibly be a draught. This is a 500mm diameter pipe, approx 120M high, with the weld in the middle. Obviously at this size it is not back purged. I had not really considered this, but you could very well be right...Thanks for your input Regards...
  7. deco0404

    Very Curious Weld Defect

    Hi Ornerynorsk, The weld is horizontal, in order for the weld to lose tension like this, it must have been white-hot, and at that point I would expect to see damage to the parent material. This is not an isolated incident. There are 3-4 other locations like this! please note that the picture...
  8. deco0404

    Very Curious Weld Defect

    thanks for the opinions guys, but it cannot be arc strikes..I should have clarified a bit better. This is the root of the weld you are looking at. The welder had no internal access....
  9. deco0404

    Very Curious Weld Defect

    Hi Guys, just came across a strange looking defect in a weld which I have not seen before. I would be very interested to know if anyone has seen the likes of this before, or can shed some light on to what we are looking at here. A little background. The parent material is S355 TMCP steel...
  10. deco0404

    Use of 304ss in Marine environments

    Thanks for the comments Ed
  11. deco0404

    Use of 304ss in Marine environments

    I understand, and again I have used this argument. The walls are fabricated from mild steel, but are all corrosion protected....
  12. deco0404

    Use of 304ss in Marine environments

    Thanks Ed, that is precisely my own argument. I would go further to say that even being in a controlled environment, we do not know what has happened on the quay sides, or what happens during transportation and / or commissioning! I was hoping that someone would just say no you cant use it at...
  13. deco0404

    Use of 304ss in Marine environments

    Hi Guys, I know that there are plenty of threads about this subject, and probably all recommend that 304ss not be used at all. My question is relating to the use of this grade of stainless on doors in an environmentally controlled room within the topside. My own opinion is that this material...
  14. deco0404

    Galvanising v Micro Zinc Processing

    Thats great & very helpful Tom, thank you. Steven, do you have any examples to support your comments. I'm in a bit of a rush here and need to travel to Germany next week to view these items, but as I am unfamiliar with this type of process (microzinq), i need all the help I can get. I had a...
  15. deco0404

    Galvanising v Micro Zinc Processing

    Hi guys, thanks for the comments. Tom, we have been given salt spray test results which from the documentation supplied would suggest 2500-3000hrs until rusting, whereas hot-dip for the same material would only be 400-500hrs. TVP, I dont think its a flake deposit (might be wrong though), they...
See more

Part and Inventory Search

Back
Top