Pipe Materials 1

[Rob100]

Does anyone know where I can locate a chart for metals to be used in wasterwater. In particular, I want a comparison of 304 versus 316 stainless. I'm look for properties such as corrosion & erosion charicteristic and alternate material. I've searched the internet and haven't found a site listing 304 SS and wastewater.

 

[RWF7437]

Try Googling the Water Pollution Control Federation (WPCF) in the U.S. Also look at any information from the US EPA and from Stainless Steel suppliers in your area. I have some info but it is quite old.

Good luck

 

[bimr]

http://www.stainlesswater.org/index.cfm/ci_id/86/la_id/1.htm

http://www.nickelinstitute.org//index.cfm/ci_id/11845.htm

http://www.nickelinstitute.org/index.cfm/ci_id/152/la_id/1.htm

http://www.nickelinstitute.org/index.cfm/ci_id/11016.htm

 

[rconner]

I suspect this may well be one of those "it depends" type questions (it depends on the specific exposure conditions) -- some sewer environments might not cause failures of stainless steel (or for that matter concrete or other steel/iron?), whereas some might be problematic to these and many other materials, if unprotected. You may be interested in the matrix on Page 2 at

http://www.hrwallingford.co.uk/projects/SEWER/sewer_home/S5D4.pdf,

and the information linked to with the "Related Articles" links at

http://www.wwdmag.com/Microbiologic...ipal-Water-Treatment-Plant-Piping-article700.

 

[BRIS]

Try posting on the "steel and Stainless Engineering" forum.

 

[ruggerjvd]

I have found that 304 will show quite abit of pitting in a humid environment, or if there are chlorides present. Much of the integrity of the system has to do with the quality of the field welds, whether or not they were pickled and passivated properly, cleaned, and the type of brush used. That may actually be more of a factor than the type of material used.