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Re: [MW:18192] "lethal subsatance"

By Materials & Welding
Ammonia is not considered as lethal if its under pressure or in liquid state. Small leaks from the vessel will not have much effect since it is lighter that air compared to gases like H2S which is heavier than air. Ammonia will definitely cause problems to your respiratory track as it effect the lungs on prolonged presence in that leaked perimeter. If the concentration is high then it will cause eye or skin damages. To conclude this ammonia will not cause death to a person when there is a small leak from a pressurized vessel when compared to H2S. Similarly the responsibility of deciding whether the substance is lethal or not cannot be purely left on the user.

Regards,

Nitin


On Mon, Jul 15, 2013 at 6:54 PM, <Rui.Pinho@pt.linde-gas.com> wrote:
You can see en the attach the safety considerations to NH3:




Cumprimentos

Rui Fernandes Pinho
Divisão de Gases Industriais
Desenvolvimento de Aplicação de Gases

Linde Sogás, Lda.
Travessa Joaquim Dias Salgueiro, Nº 44
4470-416 Vila Nova da Telha, Portugal
Phone + 351 22 999 8380, Fax: + 351 22 996 4039
Mobile + 351 91 473 9197
rui.pinho@pt.linde-gas.com, www.linde.pt



From:        ecco spi <eccospi@gmail.com>
To:        materials-welding@googlegroups.com
Date:        15-07-2013 11:49
Subject:        Re: [MW:18183] "lethal subsatance"
Sent by:        materials-welding@googlegroups.com



Dear Sir

As in Ourcase liquid Ammonia as Anhydrous material with high concentration% is lethal. Considering Safety releif valves venting yes this is rather small amounts with great precautions.
But as for leakage or explosion THIS WHAT MEANT AS LETHAL. Where design &construction consideration.
Hope this clarify everything.
B.rgrds
C.eng.A.Aziz Gendia
ecco-spi
President & CEO

On Jul 14, 2013 11:56 AM, "Sakib" <sakib321@gmail.com> wrote:
@mohannagpal
can you please explain how ammonia can be lethal. As per my understanding, lethal is any substance whose little amount cause death. However human being can sustain in little amount of ammonia i.e 25ppm in extremist case.
 
Regards
Saqib Jalal
Inspection Engineer
On Sun, Jul 14, 2013 at 12:24 PM, mohan nagpal <mohannagpal@rediffmail.com> wrote:

Yes ammonia comes in lethal class

Mohannagpal



Sent from RediffmailNG on Android

From: "Riaan Stoltz"Riaan@ritc.co.za
Sent:Sun, 14 Jul 2013 14:49:31 +0530
To: "materials-welding@googlegroups.com" materials-welding@googlegroups.com
Subject: [MW:18169] &quot;lethal subsatance&quot;

Dear Experts

In your valued opinion, is Ammonia in liquid and gas form (under pressure) considered to be a "lethal substance" as per ASME VIII Div 1 UW 2 (a) note 1?

Please share your comments.

Best regards.

RIAAN STOLTZ

RITC INSPECTION

083 640 5909

021 556 4884 (TEL)

021 556 6941 (FAX)

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with Regards


Saqib Jalal
Inspection Engineer
API 510 Pressure Vessel Inspector
(API # 47189)

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