304 or 316SS for chemical injection skid
304 or 316SS for chemical injection skid
(OP)
Hi
We're checking the material requirement for one skid to feed bactericide into some process lines ( 45°C/113°F; 218psi), around 10l/h of Glutaraldehyde, Quaternary amine and THPS, each one for 6 days.
Currently, our standard is to use 304SS, but due to a fail in one weld we started to think a little more.
The Quaternary amine is pH 4-5 using ASTM E70, and the IATA is Class 8 packing group III
The THPS is pH 4 using ASTM E70, and the IATA is Class 8 packing group III
The Glutaraldehyde is pH 7 using ASTM E70, and the IATA is Class 8 packing group III
I supouse that we need is a material selection index, so if anyone known a good one it will be very helpfull.
Regards
AVC
We're checking the material requirement for one skid to feed bactericide into some process lines ( 45°C/113°F; 218psi), around 10l/h of Glutaraldehyde, Quaternary amine and THPS, each one for 6 days.
Currently, our standard is to use 304SS, but due to a fail in one weld we started to think a little more.
The Quaternary amine is pH 4-5 using ASTM E70, and the IATA is Class 8 packing group III
The THPS is pH 4 using ASTM E70, and the IATA is Class 8 packing group III
The Glutaraldehyde is pH 7 using ASTM E70, and the IATA is Class 8 packing group III
I supouse that we need is a material selection index, so if anyone known a good one it will be very helpfull.
Regards
AVC





RE: 304 or 316SS for chemical injection skid
Try www.corrosionist.com/
Resitance tables are good.
Good luck
RE: 304 or 316SS for chemical injection skid
Some of my coleagues said it's no reason to change it, because the fail might be in the weld and not due the material.
The material is 304, not L.
RE: 304 or 316SS for chemical injection skid
Sounds like you use biocides continuously. Not sure how that will factor in on a recommended material change, but I'd guess it makes your application tougher than mine.
Good luck,
Latexman
RE: 304 or 316SS for chemical injection skid
In the petroleum industry each weld has a history such as RT/UT inspection and testing and weld method. The mechanical company usually has copies of this information (which is usually not given to the client). So, you would be able to find information on this particular failure.
Why revisit and change your company standards for one weld failure that may have not been up to the standards in the first place.
-MF
RE: 304 or 316SS for chemical injection skid
Sometimes nothing to do about it, even thoroughly pickling and passivating.
You can use pvdf or ptfe lined pipe.
Check chemical resistance.
RE: 304 or 316SS for chemical injection skid
Steve Jones
Materials & Corrosion Engineer
http://www.linkedin.com/pub/8/83b/b04