Dear everyone,
I have a question about material selection for cooling water pump.
our cooling water (specific) condition is as follows:
- Temp.: 36 - 46 degree C
- Chloride (Cl-): 2200 ppm
- Fluoride (F-): 2000 ppm
Considering the chloride content, Duplex Stainless Steel is acceptible...
I have applied CS for dearator storage drum.
However, in ITB data sheet, SS cladding is required.
To persuade CLIENT, I try to find the reasonable reference for CS application but i have only experience.
Dear everyone,
With reference to datasheet for deaerator storage drum, SS 316L cladding is required for deaerator storage drum.
my deaerator storage drum's condition is as follows:
- Temp.: 115 degree C
- Press.: 0.7 bar
- controled pH: 8.5 ~ 9.5 @ 25 degree C
- Oxygen Control: 7 bbp
CS + 3.0...
to thomas Eun
thanks your concern.
main service is acid gas service. exactly, the amine(MDEA) regenerator OVHD gas.
therefore, i think it is not in ammonium bisulfide environment, no acid solution and no erosion.
Thanks, strider6
The application of alloy 825 could be understanded if chloride is more than 50 ppm and H2s partial pressure is more than 100 kPa as per Table A.2 on NACE Mr0175 ISo 15156.
However, there is no chloride.
therefore, I have asked if there is other reasin for alloy 825 application.
Dear all,
Licensor request to apply Alloy 825 on H2S service that H2S partial pressure is more than 900 mbar. (on equipment and piping)
service temperature is about 50 degree C, no chloride and vapor phase (compressor system).
However, I don't know the reason.
Is it caused by corrosion or...
thanks all,
we generally know that A333 gr.6 and A334 gr.6 are KCS.
However, it is difficult for verification because it is not specified in ASTM or ASME specification.
For example, A516 is specified as killed CS in ASTM or ASME specification.
therefore, i want to know the reference that A333...
All,
A333 and A334 are selected as material for LTCS item (-40 degree C).
However, CLIENT request KCS.
In accordance with ASTM specification for A333 and A334, these material is not specified as KCS.
exactly, it is not specified this is KCS or not.
Are A333 and A334 the KCS?
Please let me...
Hi, I'm Xeros.
Our client request that corrosion rate shall be estimated using Shell's Hydrocor Model.
However, I could not find the information about Hydrocor Medel.
Is it a document? or software?
Please let me know the information about Hydrocor Medel incuding purchase method. (I could not...
Dear all.
Hi, i'm Xeros.
Our Client request the Third party Expert/Agency for RBI/CRAS study. I have studied the API 581 and the related document.
However, I have no idea because of no experience. I understand somewhat, but I don't know what I do.
Could recommended the company for consulting...
Somebody said that using B7 (without protection) bolt for external SS flange (no thermal insulation) shall be inhibited because this is a dissimmilar metal contact and galvanic corrosion could occur (because rain water could be electrolyte).
Therefore isolation kit or coating shall be applied...
Hi,I'm Xeros
My Client requests to fabricate the reactor with 2.25Cr-1Mo-0.25V steels.
I heard that 2.25Cr-1Mo-0.25V steels has following advantages:
- High strength therefore thickness could be decrease
However, I think that 2.25Cr-1Mo-0.25V steels has more disadvantage as follows:
- High...
Thank you for your help.
AND MORE,
I want to know the reason CI for Fire Service and CS for Liquid Sulfur.
Is the reason that CS is more corrosion resistant than CI?
Or mechanical properties?
