Normalized materials for special services

[jtseng123]

Dear all,
Do any of the following services require normalized plates, forging and fitting ?
1. Caustic service
2. Acid service (H2SO4)
3. Lethal service
4. Hydrofluoric (HF) Acid service
5. Any other services require normalization if you know of ? (Wet sour service is yes)

I try to put all together as a general guideline

 

[r6155]

The list is infinite.
All the services you mention can be read in the respective codes and standards.

Regards

 

What material plates, forging and fittings do you want to normalize?

"Everyone is entitled to their own opinions, but they are not entitled to their own facts."

 

[GD2]

jtseng123,
The codes and standards don't select material for the service but they do provide rules for construction in terms of prohibition, quality control and tests depending on the service/fluid.

GDD
Canada

 

[jtseng123]

All, it is for carbon steels used in these special services.
Codes will not talk about whether to normalize materials for special services. It is all based on experience and testing and many engineering firms or oil companies have their own specific requirements whether normalized CS shall be used. I am looking for people who have purchased vessels for these service or have seen specifications and kindly advise if normalizations is required. Thanks.

 

[SnTMan]

Jtseng123, I'd think your best bet is to trawl as many E&C specs plus as many industry stds as you can get your hands on. I doubt this codified in any one spot.

Regards

Mike

The problem with sloppy work is that the supply FAR EXCEEDS the demand

 

[r6155]

@ GD2
You are wrong.

NACE NACE Standard MR0103
Materials Resistant to Sulfide Stress Cracking in
Corrosive Petroleum Refining Environments

NACE Publication 8X194
Materials and Fabrication Practices for New
Pressure Vessels Used in Wet H2S Refinery Service

ASME VIII Div. 1 UCS-6 STEEL PLATES
(a) Approved specifications for carbon and low alloy
steel plates are given in Table UCS-23. A tabulation of al?
lowable stress values at different temperatures are given
in Section II, Part D, Subpart 1, Table 1A (see UG-5).
(b) Steel plates conforming to SA-36, SA/
CSA‐G40.21 38W, and SA-283 Grades A, B, C, and D may
be used for pressure parts in pressure vessels provided
all of the following requirements are met:
(1) The vessels are not used to contain lethal sub?
stances, either liquid or gaseous.


Regards

 

[jtseng123]

Still, anyone has the experience to advise which services require normalized materials ?

 

[GD2]

jtseng123,

It's a tough question and there is no any cookie cut answer to your question. There are so many variables involved in this question such as the material chemical composition, physical properties, percentage concentration/strength of the fluid, temperature, pressure, location (ambient conditions) etc.
You should consult a material engineer to define the material for your service.
As a thumb rule, a heat treatment process is required where the fluid/environment will cause a stress corrosion cracking. In terms of design, a normalized steel will lower the MDMT compared to a non-normalized steel for the same wall thickness.

GDD
Canada

 

[SJones]

Still anyone has the experience to advise which services require normalised materials

Any service where the end user deems that normalised material would offer the required performance not provided by other heat treatments.

Steve Jones
Corrosion Management Consultant

http://www.linkedin.com/in/drstevejones

All answers are personal opinions only and are in no way connected with any employer.