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  1. jangolobow

    Water marks remowal on SS

    Hallo! How shuold I remowe water marks from stainless steel on metalsurface? I tried alchohols, and different solvents but without success. I cannot use oii or some similar fluids. thanx
  2. jangolobow

    Painting system high temperatres

    Hay all1 i am searching a reliable high Temperature off shore (up to 600 ° C) painting system for cast steel and stainless steel, aluminum. Do you have some suggestions? How shoudl I prepare surface? How many layers their thickness etc. Any input is welcom.
  3. jangolobow

    Corrosion on cast steel

    We are having a larger stock of valve bodies made of cast steel CF3M and corrosion appears due to humidity in our warehouse which can not be decreased. What are you proposed to protect the corrosion? medium should be effective nit exensive and easy to use? Any sugegstions? How do you remove...
  4. jangolobow

    Valve cleaning question

    Hay to all! Do you have some experiences by applying a clean laser system for cast valve cleaning (inside)? Are there some suggestions? How good can you clean the cast? Do you remove all dirtiness? Any input is welcome! Thx
  5. jangolobow

    pore measuring device

    Hay which measuring device do you suggest for detection of pores in cast steels? It should be easy to use one for manufacturing application. Thank you G
  6. jangolobow

    Spots on cast iron

    Hay thanks for answer! I marked spots with marker. But spots which were marked remain on the cast. They can only be removed from cast by grinding. I tried all possible solvents without success. Spots size is up to 5 mm. What is suppriesingly if we put the cast ins heat own fpr 1 hour to approx...
  7. jangolobow

    Spots on cast iron

    Hay We are using CAST steel A351 CF8. After cleaning of this cast steel with acid spots like oil spots remain. I am attaching the photo. Does somebody have an idea what those spots are? We can not remove them by cleaning agent, acid, base only mechanically by grinding. Thx JG...
  8. jangolobow

    Cast steel porosity

    Photo normal lighthttps://files.engineering.com/getfile.aspx?folder=d07b8a5a-9869-4577-98f7-0055ed7b023e&file=IMG_0770[1].JPG
  9. jangolobow

    Cast steel porosity

    And photo under UV lighthttps://files.engineering.com/getfile.aspx?folder=ab429a31-6ba3-4ba4-91cc-61d02f6cbbc0&file=IMG_0782[1].JPG
  10. jangolobow

    Cast steel porosity

    Hay! I am attachning the picture. Is difficult to take a photo on relative small pores. First photo is under normal white light and the same area under UV light. Pores are randomljy distrubuted all over the casting part. For me it looks like some dirt however it is empty - hole. I do not...
  11. jangolobow

    Cast steel porosity

    Hay! i would like to improve porosity at Cast steel CF3M. We obserev that cast steel is porouse. We would like to improve cast surface woith postprocessing. Currently we are grinding and welding the surface. Do you have some other suggestions? We are in contact with cast steel supplier but...
  12. jangolobow

    standard of a351 cf8m material

    Hay there! does there exist some stanfdard a351 cf8mmaterial which could be bought for some analytical porpouse? if yes where we can buy a351 cf8m let say some small quantity a plate or chip? thanks for answer
  13. jangolobow

    spots on metal surface after applying pressure

    Hallo I have question. From raw material supplier we obtain material in desired form (cast). We assemble this part and clean it (with first hot water and after with dry ice and again in hot water). Material surface is completely clean. After applying pressure on this part some spots appear on...
  14. jangolobow

    1.4122 pressure temperature rating

    Let say that flange or a pipe is done of 1.4122 material. I am searching pressure temperature rates for this material. There is a lot of data available for ASME steels but for 1.4122 is not possible to find the data. does somebody has something?thx jg see example in tables on next...
  15. jangolobow

    1.4122 pressure temperature rating

    Thank you for the answer. i wuld need additionally effect of pressure on material properties similar like for material used for pressure vessels, valves etc,...do you have this data also? thx JG
  16. jangolobow

    1.4122 pressure temperature rating

    Hay! i am serching pressure temperature rating for material 1.4122. There is no asme equivalent. Does somebody has such table diagramm? Any input is welcom! thx jg
  17. jangolobow

    example of process instructions for production of goods used in ATEX environment (valves)

    Hallo! We want to export in different countries. Does there exist a simple example for valves assembling with undergo ATEX? Are there some examples? In wikipedia is not much written about QA.
  18. jangolobow

    example of process instructions for production of goods used in ATEX environment (valves)

    Hay there! Does sbd. has an example of how does process instructions for production assembling of goods (valves) which undergo under ATEX directive looks like (a simple flow chart). What and where the ATEX must be applied? Which proofs do the assembling workers have to have (certificates...
  19. jangolobow

    measureing tool for measureing oil and fat remains on steel surface

    Hay I am searching a measuremnt tool for measuremnt of oil and fat remains on steelsurface (all type cast forged, stainless steel etc) prior painting it. i would need a small sensor portable) if exist. some ideeas? thanks
  20. jangolobow

    G93

    Hay! can you give me names of testing method (tools) company which you are using for oil, grease and fat measurements on the stainlesssteel surface acc to ASTM G93. i am searching a good roboust and reliable tool which meeasures remains of oil fat and grease after cleaning application. Any...

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