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Congratulations cowski on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!
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Pipeline corrosion and integrity inspection without smart pigging?
Without the IP, the integrity assessment is not deemed complete. In addition to what has been give above? Have you tried the checking on the probes and coupons..and the sampling analysis? Or perhaps a quick check using modelling tools,? CH. Lee, PhD P.E Lead Materials and Corrosion Engineer...- CH. Lee
- Post #5
- Forum: Corrosion engineering
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Produced water chemical analysis evaluation
are you producing H2S also? what's the CO2 partial pressure of the preceding separation? if you have the operating parameters, pressure, CO2, H2S, temp, i will run a quick check on ECE and Hydrocorr; nevertheless, the morphology suggests it's quite unlike a CO2 corrosion, further, it broke...- CH. Lee
- Post #16
- Forum: Corrosion engineering
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What is the solution for pipeline corrosion?
best is to assess the damage, examine the fluids handled, perform a quick survey of the damaged sites and identify the possible corrosion mechanism and the cause of it. I wouldn't jump to a conclusion to select a higher grade material without know the root cause of the issue. Changing a material...- CH. Lee
- Post #14
- Forum: Material engineering general discussion
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316l stress corrosion cracking elevated temperature
Kev, i wouldn't use 316L to handle 200 'C chloride-laden fluids. ClSCC is the possible threat, alongside with other damage mechanisms, e.g. pitting, crevice. SDSS would certainly a better option, with a much higher chrome content, hence the higher PREN, CPT and CCT. The mechanical properties...- CH. Lee
- Post #8
- Forum: Corrosion engineering
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MIC Corrosion Wet Gas
thumbs up for the efforts to sample for APB and SRB in the produced water; the 3-phase separators are normally equipped with demister at the gas outlet, there are changes mists and droplets of liquid can be carried over into the gas phase, in theory, the bacteria can grow and colonise in this...- CH. Lee
- Post #7
- Forum: Corrosion engineering
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Lower limit of H2S partial pressure in NACE MR0175/ISO 15156 for CRA material
or would one specify that as NACE-complied SS316L? which means the steel to fulfill at least this - Solution annealed, no cold work to enhance properties, hardness up to 22 HRC; as long as there is present of H2S, no matter how low thx- CH. Lee
- Post #10
- Forum: Metal and Metallurgy engineering
