RE: [MW:14348] MOC for High H2S gas under pressure

Hi Vinod,

Generally austenitic stainless steels are very popular materials in
pharmaceutical industry due to hygiene and cleanliness issues. The selection
may vary from 304L 316L/LN and to the higher ends also.

Alternative could be duplex S.S also(see as attached).

The other options could be fluoro-polymers.But this is fairly new area in
terms of MOC.(seethe DuPont article)

I would think based on the operating parameters presented below a choice
between austenitic S.S or duplex could be ideal.

Thanks.

Pradip Goswami,P.Eng.IWE
Welding & Metallurgical Specialist
Ontario, Canada.
Email-pgoswami@sympatico.ca,
pgoswami@quickclic.net

-----Original Message-----
From: materials-welding@googlegroups.com
[mailto:materials-welding@googlegroups.com] On Behalf Of Aniket Gupta
Sent: Tuesday, May 22, 2012 4:13 AM
To: materials-welding@googlegroups.com
Subject: Re: [MW:14337] MOC for High H2S gas under pressure

You can use Carbon Steels with Nace Quality ( Controlled Composition of
Alloys).
Ex SA 516 60 ( Nace for Sulphide Cracking) Some of the clients want Heat
Treatment after fabrication.

Aniket Gupta

On 5/20/12, vnbhatt@gmail.com <vnbhatt@gmail.com> wrote:
> Respected Material Experts,
>
> We have a pharmaceutical client inquiry where they have gas media with
> 60 % H2S gas in the mix with 500 PPM moisture flowing from piping,
> vessels and shell-tube exchanger under pressure of 37 bar gauge.
>
> With many experienced brain on group, I seek details as to what MOC to
> be employed, what quality checks and what corrosion allowance??
>
> Appreciate guidance.
>
> Regards,
>
> Vinod Bhatt
> Sent on my BlackBerryR from Vodafone
>
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