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  • Users: brimmer
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  1. brimmer

    Coating temperature limits

    Can anyone give general guidance on coating temperature limits, and the operating temperature buffer limits of equipment to give? Are there any general guidelines / best practices out there that say something like select coating with at least 10% higher max temperature rating than operating...
  2. brimmer

    Effects of axial stresses on fillet welds

    Hello all, I am seeking some information regarding what efefct axial stresses/loading/tension might have on fillet welds, and if it is a poor idea to use fillet welds where axial stresses from environment exist. The scenario would involve welding a cylindrical sleeve on piping, using fillet...
  3. brimmer

    Pipeline Ovality

    There are 2 main methodologies in industry for calculating ovality, API & DNV. In API 5L out-of-roundness is defined as the difference between the maximum (orminimum diameter) and the nominal diameter, expressed as a percentage of the nominal diameter. In DNV-OS-F101 and ISO 3162...
  4. brimmer

    PG&E missing maps

    http://articles.sfgate.com/2011-12-31/news/30575652_1_leak-missing-maps-new-map I lost my map, guess I am no longer responsbile for integrity of those pipelines... Glad not to live near one of their lines.
  5. brimmer

    Senator blocks pipeline safety bill

    Senator blocks pipeline safety bill. http://news.yahoo.com/senator-blocks-pipeline-safety-bill-principle-070809432.html Who cares about protecting the public or environment? Its the principle that counts. Is he serious...
  6. brimmer

    Cadweld failures pipelines

    Has anyone had experience where a cadweld on a pipeline has caused a failure (leak or rupture)? If so what was the cause, cracking from hard spot, etc.. (Not trying to spark a debate about cadwelding to pipelines in general, but what failure mechanism were involved) Thanks
  7. brimmer

    Enbridge failure - photos

    Thought I would post these photos of the Enbridge pipeline failure in Michigan. Full rupture, not a leak. Does not look like corrosion, but possibly SCC (or something else). Time will tell...
  8. brimmer

    Downhole injection tubing material selection (inconel /super duplex)

    Hello, I have a question regarding choice of material for downhole gas production well, used for capillary or injection tubing. Normally the spec used for a scenario like this is Inconel 625 (0.5", 0.083" wall). However material is not readily available, lead time to long to wait. I was given...
  9. brimmer

    Pipeline repair - wall thickness for new weld tie-in

    Hello, can anyone tell me guidelines/codes used when making a new weld into exisitng piping, specifically if there is corrosion or some other indication in the existing pipe, what are acceptable limits of the corrosion or indications where the new weld will be? Situation involves gas...
  10. brimmer

    Remote Monitoring Units - pipeline application

    I am wondering if anyone has had any experience with remote monitoring untis used to monitor rectifiers for providing CP to pipelines. Any anecdotal information, successes or common problems in general or on specific manufacturers would be appreciated. Thanks.
  11. brimmer

    Food grade corrosion inhibitors

    Wondreing if anyone can provide some information into food grade corrosion inhibitors. In this case, a 16" hydrocarbon pipeline will be converted to transport brine, the brine will be sold on the other end to food manufacturing industry as the salt is pure. There are many inhibitors that work...
  12. brimmer

    low temperature operations - pressure vessels

    Can anyone direct me to good sources of information on temperature-transition curves of steels in general, and more specifically types of steels used for low temperature operation in pressure vessels (used in the petroleum industry). Thanks in advance for any information you can provide.
  13. brimmer

    Material resistant to HIC, wet sour service

    Dear experts, Can anyone advise of a material resistant to HIC in a wet sour service environment? We have seen hydrogen blistering in the shell of a heat exchanger made of A-285-C and want to replace it with a better material. I would prefer a carbon steel to keep costs lower/materials...
  14. brimmer

    Material for Heat Exchangers

    Dear Corrosion Experts, I am seeking advice on materials selection for heat exchangers in petroleum refining environment. Currently we have a fresh water cooling system, the pipine and exchangers are made from low carbon steel. There has been evidence of MIC and fouling is a problem. Sludge...

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