The Paton Welding Journal, 2007, №03

2007 №03 (08)

2007 №03 (10)

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The Paton Welding Journal, 2007, #3, 34-36 pages

Flaw detection in welded joints of a tank for liquid ammonia storage

V.A. Troitsky¹, Yu.N. Posypajko¹, I.Ya. Shevchenko¹, V.I. Karmazin², G.E. Kostenko²

¹E.O. Paton Electric Welding Institute of the NASU. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine.
²CJSC «Severodonetsk Obiedinenie «Azot», Severodonetsk, Ukraine

Abstract
The paper presents the main kinds of diagnostics of welded joints at comprehensive technical examination of large-volume tanks for liquid ammonia storage with the purpose of extension of their service life, namely visual-optical inspection, including detection and evaluation of unevenness on the wall and bottom, more precise determination of the scope of application of other control techniques; NDT of welded joints and metal of the tank wall and bottom by ultrasonic, magnetic particle and liquid penetrant testing; determination of mechanical characteristics of the metal; metallographic examination and chemical analysis of the welded joint and base metal.
Keywords: nondestructive testing methods, flaw detection in welded joints, visual-optical, ultrasonic, magnetic-particle inspection, liquid penetrant testing, mechanical characteristics, metallographic examination, chemical analysis, welded tank

References

1. DSTU 4046–2001: Technological petroleum refining, petrochemical and chemical plant equipment. Technical diagnostics. General technical requirements. Introd. 01.01.2002.
2. RD 03-410–2001: Instructions on carrying out complex technical examination of isothermal liquefied gas tanks. Introd. 01.01.2002.
3. DSTU ISO 17637–2003: Nondestructive testing of welds. Visual examination of joints made by fusion welding. Introd. 01.01.2004.
4. GOST 5264–80: Manual arc welding. Weldedioints. Main types, structural elements and sizes. Introd. 01.01.81.
5. GOST 21105–87: Nondestructive testing. Magnetic-particle method. Introd. 01.01.88.
6. DSTU 2954–94: Steel. Methods of magnetic inspection. Introd. 01.01.96.
7. OST 26-01–84: Welds of steel pressure vessels and apparatuses. Procedure of magnetic-particle inspection method. Introd. 01.07.85.
8. (2003) Technological instruction on magnetic-particle inspection of welded joints of isothermal tank bottoms. Kiev: PWI.
9. Troitsky, V.A. (2002) Magnetic-particle inspection of welded joints and machine parts. Kiev: Feniks.
10. GOST 14782–86: Nondestructive testing. Welds. Ultrasonic methods. Introd. 01.01.88.
11. GSTU 3-057–2003: Pressure vessels and apparatuses. Procedure of ultrasonic testing of welded joints. Introd. 01.01.2004.
12. (2003) Technological instruction on ultrasonic testing of overlap and fillet welded joints of isothermal tank bottoms. Kiev: PWI.
13. Troitsky, V.A. (1997) Concise manual on quality control of welded joints. Kiev: PWI.
14. SNiP 3.03.01–87: Load-carrying structures and enclosures. Introd. 01.07.88.
15. GOST 18442–80: Nondestructive testing. Liquid penetrant methods. General requirements. Introd. 01.07.81.
16. OST 26-5–88: Nondestructive testing. Color method of testing of welded joints, deposited and parent metal. Introd. 01.07.89.
17. GOST 23349–78: Nondestructive testing. Capillary detectors. General technical requirements and testing methods. Introd. 01.01.81.
18. GOST 6996–66: Welded joints. Methods of determination of mechanical properties. Introd. 01.01.67.

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Suggested Citation

V.A. Troitsky, Yu.N. Posypajko, I.Ya. Shevchenko, V.I. Karmazin, G.E. Kostenko (2007) Flaw detection in welded joints of a tank for liquid ammonia storage. The Paton Welding J., 03, 34-36.

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