The Paton Welding Journal, 2011, №03



2011 №03 (09)

2011 №03 (11)

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The Paton Welding Journal, 2011, #3, 36-37 pages  

IMPROVEMENT OF THE QUALITY OF WELDED ASSEMBLY FOR BRANCHPIPE CUTTING INTO THE WALL OF OIL STORAGE TANK

A.Yu. BARVINKO and Yu.P. BARVINKO

E.O. Paton Electric Welding Institute, NASU, Kiev, Ukraine
 
 
Abstract
Performance of the assembly for cutting branchpipes for process pipelines and hatches in lower rings of the wall of high-capacity oil storage tanks is considered. It is shown that one-sided grooving of holes for the branchpipes followed by circumferential welding on the inside of tank wall, specified by industry standards, cannot guarantee the required complete penetration. It is suggested that the two-sided non-symmetrical edge preparation should be made, providing substantial improvement of welding conditions and quality of the circumferential welds.
 
 
Keywords: arc welding, oil storage tanks, wall, branchpipe cutting-in assembly, one-sided welding, complete penetration
 
 
Received:                ??.??.??
Published:               28.03.11
 
 
References
1. PB 03-605-03: Rules of construction of vertical cylindrical steel tanks for storage of oil and oil products. Moscow.
2. API 650: Welded steel tanks for storage of oil products. American National Standards Institute FNSI/STD 650. Introd. May 1993.
3. GOST 28870-90: Steel. Methods of tensile tests of plate iron in thickness direction. Introd. 01.01.92.

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