Integrity Evaluation of Steel Flanges Joined with Metallic Gaskets

Abstract:

System integrity of a flanged connection requires that no leakages occur. Metallic flanges and their joining is of great importance when it comes to avoiding leakages from hydrocarbon lines. The American standard ASTM A182 demands that flanges must be forged to shape, thereby excluding other manufacturing methods. Mechanical properties of duplex stainless steel bars have been examined by doing tensile and charpy tests. A finite element model of a typical ASME-flange assembly was made and was used to calculate stress levels in the flange. The measured mechanical properties of the bar, showed that it is suitable for flange use.

• Periodical: Key Engineering Materials (Volumes 554-557)
• Pages: 2187-2199
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.554-557.2187
• Online since: June 2013
• Authors: Ragnar Gjengedal, Ørjan Fyllingen, Henrik Sture
• Keywords: ASME Ring Joint Flange, Bar Material, Duplex Stainless Steel, Forged to Shape, Subsea

References

[1] Bai and Bai, Subsea engineering handbook, Gulf professional publishing, 2012, section 21.3.

[2] Guo, Song, Chacjo and Ghalambor, Offshore pipelines, Gulf professional publishing, 2005, p.121

[3] ASTM SA-182/SA182M Specification for forged or rolled alloy and stainless steel pipe flanges, forged fittings, and valves and parts for high –temperature service, 2008A, section 5.4.

DOI: 10.1520/a0182_a0182m-01

[4] Dieter, Mechanical Metallurgy, Mc.Graw Hill, 1988, p.189.

[5] Gunn R., Duplex stainless steels, Abington publishing, 1997, section 5.2 p.24.

[6] Smallman and Ngan, Physical metallurgy and advanced materials, 7td ed., Butterworth-Heinemann, 2007, p.323.

[7] Hwang D.Y. and Stallings J.M., Finite element analysis of bolted flange connections, Computer and structures, vol 51, (1994), 521-533.

DOI: 10.1016/0045-7949(94)90059-0

[8] Fukuoka, Nomura and Nishikawa, Journal of pressure Technology, 2012, vol 134, pp.021202-1 to 021202-6.

[9] http://tr2000.statoil.com/TR2000/index.jsp, December 12, 2012, access limited page.

[10] Gunn R., Duplex stainless steels, Abington publishing, 1997, section 5.2 pp.57-63.

[11] Mateo A., llanes L., Akdut N, Stolarsz J. and Abgkada M, 2003, Anipostropy effects on the fatigue behavoiour of rolled duplex stainless steel, International journal of fatigue 25, (2003), 6, 481-488.

DOI: 10.1016/s0142-1123(02)00173-1

[12] Moverare J., Oden M, Deformation behaviour of a prestained duplex stainless steel, Material science and engineering: A, 337,( 2002),1-2, 25-38.

[13] ASTM A370, 2002, 7-10.

[14] NORSOK M630, Material data sheet for piping, januar 2004, MDS D45.

[15] Sato and Kado, proceedings of PVP2005, ASME, july 2005 Colorado, pp.1-8

[16] ASME, Boiler and pressure vessel code, 2010.

[17] ASME, Pipe Flanges and Flanged Fittings, B16.5, (2009)

[18] ASME, Metallic gaskets for pipe flanges, B16.20, 2007.

[19] Dassault systems, Abaqus Analysis User's manual, Abaqus theory manual, Abaqus CAE user's manual 2010, 6.10

[20] ASTM A479/A479M, Standard specification for stainless steel bars and shapes for use in boilers and other pressure vessels, 2011.

DOI: 10.1520/a0479_a0479m-21

[21] Sedricks j., Corrosion of stainless steels 2.ed., Wiley & Sons, 1996, p.15.

[22] Ingolf fra Holmslet, private comunications, Dec 12, 2012, [e-mail]

[23] NS-EN 12266-1:(2012)

[24] Bai and Bai, Subseqa engineering handbook, Gulf professional publishing, 2012, p.392.