METALLURGICAL AND LIFE-TIME ASSESSMENT OF HIGH-PRESSURE (HP) STEAM PIPES OF A PALM OIL PROCESSING PLANT

D.N. Adnyana

Abstract

This paper presents a metallurgical assessment performed on HP steam pipes of a newly constructed plant for transporting high pressure steam from a boiler to a palm oil processing plant. The aim was to assure that the material integrity of the steam pipes meet the intended specification and reliability. In addition, the aim was also to determine the estimated service life of the steam pipes. The metallurgical assessment was conducted by preparing a number of specimens from the as-received three pieces of HP steam pipes. Various laboratory examinations were performed including chemical analysis, metallographic examination, hardness testing and tensile testing at 3000C. In addition, a life-time calculation and analysis was also made using an equation based on the ASME Boiler and Pressure Vessel Code (BPVC) and data obtained from the API Standard 530. Results of the metallurgical assessment obtained showed that the HP steam pipes which were made of ASTM A-106 Gr. B were all in good condition, either in microstructure or mechanical property. There were no any significant defect observed, and all the three HP steam pipes were assumed being ready to place in service. Under the intended operating pressure and temperature of 70 bar(g) and 3000C (max), respectively it can be estimated that the HP steam pipes may likely reach some design life up to 25 years or more with the corrosion rate approximately 0.2 - 0.3 mm/year.  

Keywords

High-pressure (HP) steam pipe , boiler , palm oil processing plant , metallurgical and life-time assessment , corrosion rate

Full Text:

PDF

References

REFERENCES

[ 1 ] R. Viswanathan, “Damage Mechanisms and Life Assessment of High Temperature Components”, ASM International, Metals Park, Ohio, pp. 201-205, 394-399, 1989

[ 2 ] Technical Report, “Boiler Condition Assessment Guideline”, 4th edn, Electric Power Research Institute, Palo Alto, CA, pp. 6-1 to 6-9, June 2006

[ 3 ] API RP 571, “Damage Mechanisms Affecting Fixed Equipment in the Refinery Industry”, 1st edn, American Petroleum Institute, Washington DC, pp. 23-31, 2003

[ 4 ] ASM Handbook, “Failure Analysis and Prevention”, vol. 11, 6th edn, ASM International, Materials Park, Ohio, pp. 646-651, 1998

[ 5 ] Y. Zhang and Z. Jiang, “Reliability Analysis of Main Steam Pipe Containing De-fects”, Procedia Engineering, vol. 43, Elsevier, pp.150-155, 2012

[ 6 ] M.A. Bergant, A.A. Yawny and J.E.P. Ipina, “Failure Assessment Diagram in Structural Integrity Analysis of Steam Generator Tubes”, Procedia Materials Science, vol. 8, Elsevier, pp. 128-138, 2015

[ 7 ] Metals Handbook, “Properties and Selection: Irons, Steels, and High-Performance Alloys”, vol.1, 1st print, ASM International, Material Park, Ohio, pp. 140-148, 327-333, 1990

[ 8 ] Advanced Materials and Processes, “Guide To Engineered Materials”, ASM International, Materials Park, pp. 51-60, 2002

[ 9 ] ASM Handbook, “Metallography and Microstructures”, vol. 9, 6th print, ASM International, Materials Park, pp. 165-196, 210-216, 1995

[ 10 ] E8/E8M ASTM A-370, “Standard Test Methods for Tension Testing of Metallic Materials”, vol. 14. 02, Annual Book of ASTM Standards, New York, pp. 3-10, 2009

[ 11 ] ASME BPVC Section I, “Rules for Construction of Power Boilers”, The American Society of Mechanical Engineers, New York, NY, pp. 13-14, 2007

[ 12 ] API Standard 530, “Calculation of Heater-Tube Thickness in Petroleum Refineries”, 5th edn, American Petroleum Institute, Washington DC, pp. 48-49, 2004

[ 13 ] ASME BPVC Section II Part A, “Ferrous Materials Specification”, The American Society of Mechanical Engineers, New York, NY, pp. 205-220, 2007

[ 14 ] ASME BPVC Section II Part D, “Materials Properties”, The American Society of Mechanical Engineers, New York, NY, pp. 10-13, 2000

Copyright (c) 2019 Metalurgi
Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

Refbacks

  • There are currently no refbacks.