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https://www.sciencedirect.com/science/article/pii/S2666330924000177#:~:text=In%20seawater%20and%20hydrocarbon%20services,et%20al.%2C%202018). https://www.sciencedirect.com/science/article/pii/S030801612400084X?dgcid=rss_sd_all Steve Jones Corrosion Management Consultant...

IOGP S-619, Annex J, Figure J.7 Steve Jones Corrosion Management Consultant www.linkedin.com/in/drstevejones All answers are personal opinions only and are in no way connected with any employer.

Ah - you have changed the rules slightly: the OP was 150,000 ppm Cl-. Looks like erosion might be a further concern. You may need to examine the thickness of cladding required too. Steve Jones Corrosion Management Consultant www.linkedin.com/in/drstevejones All answers are personal...

The first paper is by my former colleagues, however, I organised a test programme in 2007 for a heavy sour project with 169,00 ppm chloride. Barely a blemish on numerous four point bend tests. Unfortunately, I can’t release the test reports. The facilities constructed with ‘basic’ 825 have...

You switch from carbon steel to a CRA when you deem the risk of failure with the carbon steel to be unacceptable. ISO 15156 deals only with H2S cracking, there are many other damage mechanisms that could be in play. If the hardness criterion is met without heat treatment, it is not mandatory...

Is the first layer not going to be 309, so which composition has to be undiluted? Steve Jones Corrosion Management Consultant www.linkedin.com/in/drstevejones All answers are personal opinions only and are in no way connected with any employer.

What will be the plan for the slug catcher materials? Unless there are multiple vessels to manufacture, 825 clad plate will probably not be cost effective, and it will be a case of weld overlay cladding. Some will argue that overlay with 825 is fine, and easily done; others will advise the...

@Huub - there are fabrication recommendations from the likes of IMOA that recommend heat treatment for cold forming strains of the value that you quote. I suspect that the client in the opening post is possibly a little nervous about sour service. Recommendations by the material manufacturer...

Issue a technical query to the client indicating the potential negative impact of having to perform the heat treatment, and request their reasoning as to why it is necessary. If this requirement has suddenly sprung up post contract award, you might like to cost out a claim to attach. Steve...

https://www.iogp.org/bookstore/product/s-619-pressure-vessels-unfired-fusion-welded-v2-0/ Annex D, D.1.2 Steve Jones Corrosion Management Consultant www.linkedin.com/in/drstevejones All answers are personal opinions only and are in no way connected with any employer.

Have tested 825 in far worse conditions of all corrodents. No pitting. No cracking. It’s welds that need attention. Other associated testing resulted in setting a threshold of requiring a minimum Cr content of 39 mass%. You will note from the materials datasheets in IOGP S-563 that a minimum...

New spec just published by IOGP https://www.iogp.org/bookstore/product/specification-of-hydrogen-embrittlement-resistant-api-std-6acra-grades/ Steve Jones Corrosion Management Consultant www.linkedin.com/in/drstevejones All answers are personal opinions only and are in no way connected with...

Try a Google search on the term “corrosion of pipe support trunnions” Steve Jones Corrosion Management Consultant www.linkedin.com/in/drstevejones All answers are personal opinions only and are in no way connected with any employer.

@evelynstpl - can we now get clarification as to whether insulation is stipulated for heat conservation, or personnel protection, or both? Steve Jones Corrosion Management Consultant www.linkedin.com/in/drstevejones All answers are personal opinions only and are in no way connected with any...

Polypropylene would have been a good bet for pipeline insulation Steve Jones Corrosion Management Consultant www.linkedin.com/in/drstevejones All answers are personal opinions only and are in no way connected with any employer.

PP = personnel protection. For these temperatures, it would, ideally, be mesh guard which confusingly gets called “insulation.” Steve Jones Corrosion Management Consultant www.linkedin.com/in/drstevejones All answers are personal opinions only and are in no way connected with any employer.

https://store.ampp.org/sp0487-2019-considerations-in-the-selection-and-evaluation-of-rust-preventives-and-vapor-corrosion-inhibitors-for-interim-temporary-corrosion-protection Steve Jones Corrosion Management Consultant www.linkedin.com/in/drstevejones All answers are personal opinions only...

@Ratheesh - I was referring to the quality of the engineering contractor who drafted the specification. The client then never checked the defective specification properly before issuing it for use. Steve Jones Corrosion Management Consultant www.linkedin.com/in/drstevejones All answers are...

@Ed agreed re method C, however, the difficulty comes in setting the temperature of the acceptance criterion. Method A is selected because it has a set temperature, and doesn’t require multiple tests to ramp the temperature up. It’s even found its way into accepted standards for testing 625 at...

The difference is probably down to the quality of the engineering contractor, and the quality of the checking by the client. Steve Jones Corrosion Management Consultant www.linkedin.com/in/drstevejones All answers are personal opinions only and are in no way connected with any employer.