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Statistical data

4 replies [Last post]
Fri, 2009-01-30 11:37
Luca Masina
User offline. Last seen 15 years 24 weeks ago. Offline
Joined: 30 Jan 2009
Posts: 4
Groups: Petro-Chem / Oil & Gas
Hi everybody, I would like to have some information regarding petrochemical plant:
Have someone got statistical data concerning timetable for welding of piping and fittings, detailed for material, size, rating and type of welding?

Thank in advance.

Regards
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Replies

Sat, 2009-01-31 10:40
#1
Samer Zawaydeh
User offline. Last seen 5 years 25 weeks ago. Offline
Joined: 3 Aug 2008
Posts: 1664
Groups: Civil Engineering, Regional Representatives
Dear Friends,

The Fabrication process time depends on the item being fabricated.

Structural Steel is usually divided into four sections;
Light steel
Medium steel
Heavy steel
Extra Heavy steel

The manhours spent in production (complete item) usually depends on the weight of the item in case it is just structural steel.

The range can be from 9hours/MT - 100+hours/MT depending on the type of structure and the availability of required equipment.

Best Regards,

SAmer
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Sat, 2009-01-31 06:42
#2
Hady Mohamed
User offline. Last seen 10 years 48 weeks ago. Offline
Joined: 3 Feb 2006
Posts: 12
Groups: None
Luca,

Whilst allocating the durations for the welding activities, do not forget to allocate enough time for the "Fit-Up" phase the precedes the actual welding. That is, the edge preparation of both sides of the butt-weld, a tack weld in place, and an inspection by the QC Inspector of the quality of the Fit-Up process.

From my (limited) experience, the duration of the Fit-Up process can be overlooked and this may lead to inaccurate schedules.
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Sat, 2009-01-31 03:29
#3
Luca Masina
User offline. Last seen 15 years 24 weeks ago. Offline
Joined: 30 Jan 2009
Posts: 4
Groups: Petro-Chem / Oil & Gas
Samer, thanks so much for your suggestion.

best regards
Luca
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Fri, 2009-01-30 13:38
#4
Samer Zawaydeh
User offline. Last seen 5 years 25 weeks ago. Offline
Joined: 3 Aug 2008
Posts: 1664
Groups: Civil Engineering, Regional Representatives
Dear Luca,

Did you check the American Welding Society?

Or you can check the major welding companies like Lincoln and Esab. I am sure that they will have everything you want. It is a small call to your local supplier of welding materials. Definitely the manuals exist for a long time.

Best Regards,

Samer
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