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RE: [MW:5321] Peaking & Bending Measurement of Welded Joints in Cylindrical Storage Tanks....

By Materials & Welding
You can make a template from a steel sheet / scrap plate with radius of template equal to your tank radious with an arc length of aprx 1 mtr. place this on your tank and if you are getting greater than 12mm gap, needs rectification. Similar way use 1 mtr steel rule as straight edge to check verticality.

Your 4th point itself is an answer to your query. How do you intended to check verticality and circularity?


Sent from my Nokia phone
-----Original Message-----
From: jose seban
Sent: 31/05/2010 6:40:27 pm
Subject: [MW:5320] Peaking & Bending Measurement of Welded Joints in Cylindrical Storage Tanks....

Dear Friends,

I am making fixed roof cylindrical oil storage tanks as per Indian
Standards IS-803.In section 9.3.5 it is mentioned about circularity
and shape.There it is mentioned about verticality & circularity
tolerences.Also it is mentioned about peaking and bending of welds
there..

1.Peaking of vertical weld joints measured over an arc length of 1 m
shall not exceed 12 mmm.

2.Bending of horizontal weld joints measured by a straightedge of 1 m
length shall not exceed 12 mm.

My questions are..

1.What is meant by this peaking and bending there?
2.How we will measure these factors?
3.How would the unit "millimetre" will come for these factors
measurement?
4.Is these 2 measurements are important in tank fabrication,if I am
checking vericality & circularity properly?


Regards,

Jose Sebastian,
Quality Manager,
Adani Power Limited,
Gujrat,India.
Mob:+919687660525

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