Try to find the representative for Restek Performance Coating in your country. Restek has the patent for the Sulfinert(R) process. The layer is used for analyzing equipment for parts-per-billion levels of organo-sulfur compounds. (information from the Norwegian representative for Restek)
We have had sucess with Inconel 625 that had a minimum specified yield strength of 80ksi. Hardness was still below the max specified in ISO15156. The well was approx 10.000psi, 18% H2S, 150deg C. Do not know the amount of chlorides and CO2, but I know these elements were present.
The "C" alloys...
For equipment that is used to analyse ppm of sulfur-components we use Sulfinert(R)-layer of stainless steel. Now I got a question if we can use a Nickel alloy 625 (UNS N06625) that is not Sulfinert(R) instead. Alloy625 is very good in H2S environment, but applying Sulfinert(R) coating is...
SJones,
Thank you for directing me to this paper. The figures is informative and gives me the answers I am looking for.
The diagram in the paper gives information about combination of CO2 (partial pressure) and NaCl (g/l).
As the document states: The alloy must be used with care as oxygen...
I want to use a test flow loop of Aisi316 stainless steel, to performe fluid test of a hydrocarbon gas with high CO2 content. The H2S content is very low and there is no water in fluid and no chlorides (the customer hope there is no chlorides present). The customer now tell us that they have...
EdStainless, you are correct about someone saying "no chlorides". I have seen pipes of AISI316 that is trasporting CO2 at temperatures above 100deg F, and it is failing because there is actually moist of water and chlorides present in the pipe.
Xda
At a seminar a couple of years ago, CLI-FAFER...
If you find the data for strength at 1000C, you can use the formula in ASME Sect II, Part D, Table 2-100(a) to determine design stress.
But read the rules carefully, to see if you can use this formula at tempreatures above 650C. The reason is that the material shifts form, and becomes very...
You need to specify if if you are planning to use stainless or carbon steel. The approx amount of sweet gas and temperature is also usefull to pick the correct alloy.
In the North Sea Norwegian sector, the oil companies use pipes with more 13% chromium if the CO2 level is high and the H2S level...
In a paper made by SINTEF in Norway in the 1990's about corrosion resistance for stainless steels, this is mentioned about molybdenium:
"Increasing amount of molybdenium will increase the corrosion resistance of corrosion forms like pitting and crevice. The element also increases the strength...
Unclesyd and EdStainless,
The unit I am to calculate is not designed by me. The material certificate for the AISI4130 alloy just list 5 hours as soaking time. If I had designed the unit, I would have selected 17-4PH Stainless Steel, to have some corrosion resistance and be able to follow the...
I forgot to specify the heat treatment for the alloys we use:
Material certificates for AISI4130 show hardening at 860deg C for 5 hours then water quench, + tempering at 670deg C for 6 hours. Yield strength 570MPa and tensile strength 735MPa
Normal ?:
AISI4130 (DIN 1.7218) annealed @ 865deg C...
I am looking for strength at temperature for the Chromium-Molybdenium steels AISI4130 & AISI4140.
I can find alot of info about strength for stainless steels at temperature, but when I am going to verify the strength of equipment at temperatures up to 150deg C for carbon steel alloys it is not...
