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Recent content by chtimi

  1. chtimi

    PARTICULAR COATING

    Hello, A customer want to do a " Saphite coating" on internal casting parts. Could you help me, I don't know this type of coating. Thank you for your help. Chtimi
  2. chtimi

    piping and tubing

    What are the differences?I'am in europe and I dont understand .Where can I find a clear definition of these words. Tahk you for your help.
  3. chtimi

    Water analysis

    I would like to know what is your suggestion for the choice of a stainless steel in this water.It is for a centrifugal pump. Na + /7580mg/l Mg++ 563mg/l Ca++ 1435mg/l Fe++ 35mg/l Cl 14911mg/l SO4 1826mg/l HCOg 184mg/l Thank you for your help.
  4. chtimi

    dissimilar metals

    We have to do a weld procedure qualification according to ASME IX: A352 LCC with A pipe 316L.For that, we think that we can find a pipe with similar grade as ASTM A333 Gr6.ASTM A 333Gr 6 is for low T°,and we have a weld with different PNbs 1 groupe 2 and 8 groupe 1, we think we can use a rod...
  5. chtimi

    CREVICE CORROSION FACTOR

    Our costumer want a pump with metallurgies which have: A PREN sup 38 and a crevice corrosion factor sup 35. I don't know what is the CF factor. Could you help me? Thank you for your answers.
  6. chtimi

    chrome coating

    We have machined impellers for a centrifugal pumps and we have a dimension not conform. To save these pieces we can do a electroplated chrome coating, but I think it's not permitted by NACE MR0175.Could you please help me about this question. Thanks.
  7. chtimi

    Chrome coating and Nace

    We have machined impellers for a centrifugal pumps and we have a dimension not conform. To save these pieces we can do a electroplated chrome coating, but I think it's not permitted by NACE MR0175.Could you please help me about this question. Thanks.
  8. chtimi

    NACE MR 0175-2003

    I need help about NACE MR0175-2003. Section 5:Fabrication § 5.3.3 Austenitic stainless steel.... Is it necessary to have welding procedures with hardness results to demonstrate that hardness in HAZ and weld are according to hardness requirements for base metal?I don't understand what i have to...
  9. chtimi

    ALUMINIUM AND LOW T¦

    I would like to find mechanical charateritics at minus 196°C for : alloy A 356 T6 BS 1400 AB2 Thanks for your help JL
  10. chtimi

    ASTM A 488

    Could somebody explain to me ASTM A 488 for welders qualification. In § 13 of ASTM A 488 , we could find conditions for requalification of welders and essential variables listed in § 13.2 and 13.3. We don’t find ( as in ASME P N°) an essential variable concerning the category N°. My question is...
  11. chtimi

    ASME IX

    I would like to understand ASME IX concerning welders qualification. QW 350 gives essential variables. For SAW, P Number is an essantial variable and we have to see QW 403.18. QW 403.18 gives “ a change from one P Number to any other P Number or……. exept as permitted in QW423, and QW 420.2.”...
  12. chtimi

    A216WCB or A352LCB

    Our customer would like to install a centrifugal pump Liquid pumped: Hydrocarbone Operating température: Mini -30°C Maxi +200°C Minus 20°C is just for external conditions when the pump is switched off and have to start again. My question is about the choice of the metallurgies to use for...
  13. chtimi

    316L with CA6NM

    thank you for your answers. In fact it's a centrifugal pump, and liquid pumped is hydrocarbon @ 57°C/85°C with H2S. Nace is applicable. JLuc
  14. chtimi

    316L with CA6NM

    I have to weld a pipe ( vent, drain, flushing ) in 316L on a pump casing in martensitic steel CA6NM. What do you suggest for filler métal. I don't want to do a postweld heat treatment, because my pump casing is machined. Thank you for your help. JL
  15. chtimi

    Technical choice

    I have the choice between grey cast iron as A48cl35 and a carbon steel as A216 WCB for a use @ 40°C max in gasoline, petrole.( casing for centrifugal pump) I would like to know what is the best choice in regard of properties of this kind of steels. Thank for your help. JLuc
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