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Anonymous Poster

Welded Base Plate

07/15/2010 7:34 AM

Hi,

We are in the process of fabricating saddles for LPG storage tanks. In this regards i want to ask a question regarding base plate. We want to weld two plates togeather to complete the overall length of the base plate. Weld seem will be in the middle of the base plate, lengthwise. there is also a saddle rib exactly on weld seam. This whole ( base plate welded in the middle) is not something shown on drawing, but we are just short of plate and we dont have enough time to go for new ones.

My question is, can we go with this idea? is there any design complications involved with it? Code allow this?

Infact I have never seen such base plates. and I am a little bit worried about their use and i couldnt find anything that negates this.

Please reply with some good references.

Regards

EUIPDE
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farmatt
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#1

Re: Welded Base Plate

07/15/2010 10:58 AM

pictures would help

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SRIDHAR
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#3
In reply to #1

Re: Welded Base Plate

07/17/2010 12:34 AM

Generally speaking, we can join any plates to each other by butt welding even those plates are pressure or non pressure parts like saddles / structures etc.

You have to take care of your welding with proper selection of filler metals (usually done with E 7018 electrode if the thickness is beyond 20 mm or otherwise with E 6013 type electrode) bevel design ( single or double bevel depending upon thickness) and test the welds with Ultrasonic or spot (if required only) radiography.

You can also select GMAW (MAG/CO2) process in place of SMAW since it is a non- pressure part and to make it more economical.

But, please make sure that you have a WPS for it and your welders are qualified.

Any amount of welding could be carried out as long as staggering of welds are done as per the code requirements.

Sridhar.

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Abdel Halim Galala
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#2

Re: Welded Base Plate

07/16/2010 12:59 AM

See the same CR4 Thread Welded Base Plate.

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