RE: Steam Tracing and Drip leg provisions

From: <Nirmal-Murarka@enc.ltindia.com>
Date: Fri Nov 23 2001 - 01:29:00 EST

Hi Ralph,
You referred about Heat Transfer Cement on the tracers!!!

I am looking for more details on the Heat Transfer Cements. Can you throw some light on following:

1. Can this cement be applied on the regular 1/2" or 3/4" A106 pipe tracers or it requires special tubing for steam supply?
2. What is the method of applying this cement. I mean is it a paste which is to be applied using a brush or something like that.
3. How costly it is as compared to the cost of the steam tracing itself.

At last, nothing like it, if you can suggest some vendors.

                     "SARE,  RALPH
                     H."                    To:    
"'PipingDesign@yahoogroups.com'"
                     <SARERH@YANPET.        <PipingDesign@yahoogroups.com>
                     SABIC.com>             cc:
                                            Subject:     RE: [PipingDesign] Steam
Tracing and
                     10/11/2001             Drip leg provisions
                     01:57 PM
                     Please respond
                     to PipingDesign

lines requiring two parallel tracers may have one steam source divided into 2 tracers terminating in 1 trap for each tracer. just need to make sure that
you have sufficient heat to maintain the req'd temp . Most of the tracers uses a low temp saturated steam say at 50 psig. Min. size of steam lead is 3/4 NPS which is good only for a single tracers (at 50 psig the sat. temp is
about 150). Utilizing a 1 inch dia subheader (takeoff diract from top of steam main), a 2 to 3 tracers will work out just fine (using tee as u have described).

your 2nd question is not clear. if its lineup with the pump piping then its what u describe it is (ensure that pipe load damaging to the pump nozzle is not trasferred) . normally they're not adjustable (bellows) since the axial displacement has been work out in details by the mfr (based on the input provided by the end user).

back to the tracers. watch out for the pockets or low points - have an impact on tracer performance. consider also the use of compression fitting (swagelok) at areas where maintenance is needed to facilitate its easy removal.

anybody inetrested about sizing of the steam tracer - single or multiple? with or without the heat trasnsfer cement. industry standard installation practice of tracers is most welcome to rakesh posting.

> ----------
> From: RAKESH PATIL[SMTP:rpa@epc.ltindia.com]
> Reply To: <a href="/group/PipingDesign/post?postID=a0QnxO1XDxq9IIKDtfNPHlDm7Ta181gav4VAQT7Qwv4A3o6Zq6h569VCjUY4906AURkINgQoerBbePq9jG15Y08h">PipingDesign@yahoogroups.com</a>
> Sent: 09 November, 2001 8:59 PM
> To: <a href="/group/PipingDesign/post?postID=a0QnxO1XDxq9IIKDtfNPHlDm7Ta181gav4VAQT7Qwv4A3o6Zq6h569VCjUY4906AURkINgQoerBbePq9jG15Y08h">PipingDesign@yahoogroups.com</a>
> Subject: RE: [PipingDesign] Steam Tracing and Drip leg
provisions
>
> ** High Priority **
>
> Dear Sir,
>
> I am very much thankful for your prompt reply. I am working in OGSP
> (Execution). Presently I am working on IOCL Baruni - Expansion Project.
>
> Generally while tracing Process line, where only single Tracer required ,
> we prefer to go for ½" SSL which either connects to CRM or kept as CRL.
To
> avoid access of material, 3/4" sub header of steam is used which is
> further divided into two different tracers of ½" which traces the line
in
> opposite directions. Is it possible if one use to take ½" subheader
> (instead of 3/4") and provides an equal tee at the point where it starts
> tracing, and from that tee, we take out ½" tracer which will trace the
> line in opposite direction?
>
> 2. While sight seeing, I observed that in most of the cases at Pump,
> adjustable type support is provided or an Expansion bellows are suggested
> to use. What's the reason behind this?
>
>
> Waiting for reply,
>
> regards,
> rakesh
>
>
>

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Your use of Yahoo! Groups is subject to <a href="http://docs.yahoo.com/info/terms/">http://docs.yahoo.com/info/terms/</a> Received on Fri Nov 23 01:29:00 2001