hydrogen permeation monitoring in hydrogen processing(cracking) unit
hydrogen permeation monitoring in hydrogen processing(cracking) unit
(OP)
In hydrogen processing(cracking) unit,hydrogen permeation is not avoidable,how can I evaluate the risk of faliure on equipments or pipelines?
Is there an online-monitoring method now?Any clues will be appreciated.Thanks in advance.
Is there an online-monitoring method now?Any clues will be appreciated.Thanks in advance.





RE: hydrogen permeation monitoring in hydrogen processing(cracking) unit
In the Cd or Cr electroplating practice of steels there is an empirical hardness limit (about 40HRC) over which plating is strongly discouraged because of the danger of hydrogen embrittlement of the base metal.
Regards,
http://www.welding-advisers.com/
RE: hydrogen permeation monitoring in hydrogen processing(cracking) unit
Might be worth a look as a addition to other inspection methods.
http://www.ionscience.com/Pages/Hydrosteel6000.htm
RE: hydrogen permeation monitoring in hydrogen processing(cracking) unit
Hope this would help
RE: hydrogen permeation monitoring in hydrogen processing(cracking) unit
the materials mainly are Cr-Mo steels such as 2.25Cr1Mo,3Cr1Mo in lower temperature sites and austenitic steels such as 321,347 in higher temperatures sites.Sometimes the based metal are Cr-Mo steels with austenitic overwelds.Temperature is about 350-450? in reactors and lower temperatures in other sites.
Hardness depends on specific materials.
Appreciate unclesyd and liberoSimulation's help again.Is there anyone else who knows something about field monitoring with an instrument?Any information will be great.
RE: hydrogen permeation monitoring in hydrogen processing(cracking) unit
Steve Jones
Materials & Corrosion Engineer
http://www.pdo.co.om/pdo/
RE: hydrogen permeation monitoring in hydrogen processing(cracking) unit
I mean if hydrogen concentration in materials exceed some value,it will probably cause failure.Doesn't this method work?
At present,are there any methods to monitor materials hydrogen damage in high temperature hydrogen service?
I'm a junior corrosion engineer.Thanks in advance.
RE: hydrogen permeation monitoring in hydrogen processing(cracking) unit
Steve Jones
Materials & Corrosion Engineer
http://www.pdo.co.om/pdo/
RE: hydrogen permeation monitoring in hydrogen processing(cracking) unit
Once the max metal temperature (Below Design Metal Temperature with some margin) is reached after sometime, you stop H2 feed.
I have seen fire-heaters with such monitoring tool that indicates the performance of the heater with respect to coils skin temperatures.
Cheers