RE: Dimensioned Isometrics

From: <B.Sivasubramanian>
Date: Fri Apr 15 2005 - 00:01:00 EDT

Dear Paul,

The productivity of the Welds in Piping Works is a subject it self. The production rate depends on the following factors

1. Whether the Weld is done in Fab Shop or Field
2. If in field whether it is Unit Piping or on Racks or on Pipes
3. MOC
4. Thickness of the Pipes (Schedule)
5. Pre weld / Post Weld heat treatment requirements
6. Welder's skill
7. Electrode Diameter used
8. Current used for Welding
9. Type of Welding Process (Manual / Semi Automatic / Orbittal etc)
10. Climatic Conditions

etc.

Just to give a guideline, if the work is in a typical hydrocarbon facility on an average (say in a plant where the total quantum of works is 400,000 ID) you may consider 20Inch Dia per Welder Day ( 1 Welder Day = 8 hours of Work)

Cheers

Siva
-----Original Message-----
From: Paul Bowers [mailto:pbowers@pipingdesign.com] Sent: Friday, April 15, 2005 3:52 AM
To: <a href="/group/PipingDesign/post?postID=x3qbqPg6ULD2_nLJjsgvePhXjD1qvl0SY9AGxEvzdMs7qBKVqy78_TFo7WCnxP3kp6bKUUb6K1M1BOKirtH8F2B2npA">PipingDesign@yahoogroups.com</a> Subject: Re: [PipingDesign] Dimensioned Isometrics

ed engalan wrote:

> c) The welder/fitter will make all welds and assemble piping

I asked this before but didn't get a response.

How long does it take to make various size butt welds? Obviously this must depend partially on wire diameter and number of passes but I haven't been able to find anything informative on the web.

Paul

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Yahoo! Groups Links Received on Fri Apr 15 00:01:00 2005