Steve,
I read what you said about "none of their major lines has been removed". What does mean? I ask you because we have several problems with the lines that conduct the melt sulphur to the furnace. The lines are above ground. We use carbon steel ASTM A-53 Gr B for the pipes (of course jacketed pipes). Could you have an alternative material for the lines, because rigth now they last like 3 months maximun. Maybe AISI 310, SAAB 904L or something. What do you think?
Steve McKenzie <mechproj@xtra.co.nz> wrote: Just to put things into perspective, I look after 3 elemental sulphur acid plants; all about 400km apart, all about 40 years old.Because all have diesel fired startup boilers and sufficient standby generation capacity to run them, none have suffered a freeze in the sulphur lines.None of the major lines have ever been removed. The culverts provided have been a total waste of a massive amount of money. If the sulphur is a byproduct, or otherwise dirty, then some extra thought is obviously necessary. Access at bends may be all you need. Spare a thought for the owners wallet. If they let go every 10 years then you dig them up. It doesn't take long.
Cheers
Steve.
-----Original Message-----
From: G. S. N. Murthy [mailto:murthyg@petrofac.co.ae]
Sent: Friday, August 06, 2004 1:01 AM
To: PipingDesign@yahoogroups.com
Subject: RE: [PipingDesign] Buried molten sulphur pipelines
Hi Jones,
The other main consideration is at times these lines have to be removed and to be rodded or steam cleaned, if there is an accidental failure of the steam. It inviting trouble if you put them in narrow culvert. It is not advisable to bury them.
Regards,
GSN Murthy.
-----Original Message-----
From: Steve McKenzie [mailto:mechproj@xtra.co.nz]
Sent: Thursday, August 05, 2004 4:47 PM
To: PipingDesign@yahoogroups.com
Subject: RE: [PipingDesign] Buried molten sulphur pipelines
Hi JJ
because molten sulphur lines are normally steam sleeved, it is
traditionally considered asking for trouble to bury them. If you run
them in a sufficiently sized drained culvert, then no special
requirements are necessary. Condensate return is the normal design
driver. If you decide to bury them, then make sure that the steam traps
can drain and you can get at them. Given the cost of culverts, and the
reliability of sleeved pipe, I would give serious thought to burying.
That's one opinion.
Cheers
Steve
-----Original Message-----
From: JohnJones [mailto:dairyman2000qa@yahoo.com]
Sent: Thursday, August 05, 2004 6:56 PM
To: PipingDesign@yahoogroups.com
Subject: [PipingDesign] Buried molten sulphur pipelines
I'm trying to find any experience of "below ground" (buried, culverted, trenched) molten sulphur pipelines. Can any body help?
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[Non-text portions of this message have been removed] Received on Fri Aug 06 16:44:00 2004
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