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Thank-you for the clarification. Your knowledge of the subject matter and response is greatly appreciated.

Thank you. One other clarification please. Since I am rather new to this and may be irrelavant, but how do I know what steel is mild, med. or high strehgth? What is the cut off or difference in them?

Can someone tell me if there is a specific advantage regarding the use of E7010/E8010 versus E7018 for CS and under what conditions are they preferred over one another. Also, regarding hydrogen underbead cracking (delayed cracking), is there a tensile strength or material thickness where low...

Does anyone know what Code applies to the in-service inspection of refrigerated storage tanks. I have looked at API-653 and it's Scope does not include refrigerated tanks. The tank in question was originally fabricated in accordance with API-620 Appendix R. Does API-575 address this issue?

If the tubes will not properly cleaned after solution annealing the iron oxide scale would remain and would not allow the protective film to form leaving the tubes vulurable. As far as the deposits go they are very typical in this service yet other exchangers are not seeing this type of...

All metallurgical examinations are complete. The tubes do meet the ASTM criteria for A249. We also calculated the velocity of the Rich Feed at the exchangers and it was 2.8 ft/sec which should not be an issue. We are looking at other process variables to assure flashing is not occuring. Are...

The tube matrial is being verified at the lab to assure it meets the composition requirements for A249 TPA316L. Additonal testing is in progress, the composition was just part of the preliminary results. Full metallurgical examination/analysis results re still pending.

There are five gas treaters that have three amine shell and tube exchangers in series, associated with each train. Two of the trains have exchangers leaking (both are the first exchanger of the series). Since we could only look at a small portion of the total length of each tube with FEC(3ft. of...

Have removed tubes and should have results in 4-5 days. My concern is this grade stainless typically performs very well in this service. With the Moly content inhancing the corrosion resistance and the low carbon content,less likely to sensitize. The operating PH noted in the last solvent...

Eddy current inspection showed general wall loss in areas where the scale could be hydroblasted to 50%-60% of nominal "t". The actual thru wall ares of corrosion was isolated corrosion, possibly under deposit in nature. The sampling of the corrosion deposits was just completed on the SEM. The...

I am seeing significant corrosion rates (.020"/yr.) on A249 TP316L HT tubes (.750",.060" AW) in rich amine service (CO removal). These shell and tube heat exchangers were replaced 3 years ago(in-kind). The previous exchangers were in service a little over 10 years. I have pulled samples and in...