ASSESSMENT OF CORROSION RESISTANT ALLOY (CRA) CLAD MATERIAL FOR GEOTHERMAL WELLHEAD PIPING SYSTEM

Authors

  • Reylina Garcia Tayactac School of Mechanical and Manufacturing Engineering, Mapua University, Intramuros Manila, Philippines
  • Edward B.O Ang School of Mechanical and Manufacturing Engineering, Mapua University, Intramuros Manila, Philippines

DOI:

https://doi.org/10.11113/aej.v12.16773

Keywords:

Corrosion Problems, Corrosion Resistance, Corrosion Testing, CRA Weld Overlay Cladding, Geothermal

Abstract

The geothermal power industry has reported a wide range of corrosion problems. Given the extremely corrosive conditions to be treated in the geothermal sector and the benefits of reduced unplanned downtime when used, operating cost savings would be expected if more CRAs clad products were used. The selection of suitable Corrosion Resistant Alloy (CRA) material is vital for plant operability, especially in challenging well conditions with low pH value and carbon dioxide, hydrogen sulphide, and hydrogen chloride content. The primary examined material alloy 625 given its exceptional erosion and corrosion resistance. Alloy 625 was selected based on a preliminary material selection review of its mechanical and chemical properties to withstand a corrosive environment. The study method emphasizes selected material from dissimilar alloying steel grades (e.g. Backing Steel + CRA material) based on its mechanical properties, chemical composition, macro and micro examination, and corrosion resistance using the common industrial standards. The study focuses on using Alloy 625 cladding using the overlay method to determine the weld overlay's suitability for the geothermal production system. The weld overlay cladding is performed to increase the components' life and as a replacement using an expensive corrosion resistant solid material. In many cases, only the surface of the material requires corrosion resistance and carbon or alloy steel can be clad with a more corrosion-resistant alloy. Up to 50% of the cost of using the solid alloy can be saved by cladding. This study also describes the technical and economic advantages of using Alloy 625 clad material in the present condition

References

K. A. Litchi, S.P. White, M. Kho, R.R. Villa Jr, F.L. Siega, M.M. Olivar, and N.Sanada, 2010e. “Acid Well Utilisation Study: Well MG-9D, Philippines”, World Geothermal Congress, Bali Indoesia. 1-11,

R. Datuin and F.M. Gazo, 1989. “Material Problems of Geothermal Power Plants: A Philippine Experience”, 11th New Zealand Geothermal Workshop, New Zealand, 275-281,

Norsok Standard 2004., Materials Selection (M-001 Rev.4), Norway,

A. Keserovic and R. Bäßler, 2013. “Material Evaluation for Application in Geothermal Systems in Indonesia”, Corrosion 2013 NACE International

M.J. Cieslak 1991, The Welding and Solidification Metallurgy of Alloy 625,

Inconel Alloy 625, 2013. Retrieved from https://www.specialmetals.com/documents/ technical bulletins/inconel/inconel-alloy-625.pdf Access date: 02 February, 2021

American Society of Mechanical Engineers 2014, ASME Code for Pressure Piping (ASME B31), USA

American Petroleum Institute 2009. Specification for CRA Clad or Lined Steel Pipe (API 5LD), USA

American Petroleum Institute 2004. Specification for Lined Pipe (API 5L), USA

American Petroleum Institute 2006., Specification for CRA Line Pipe (API 5LC), USA,

American Society of Mechanical Engineers 2019, ASME Boiler & Pressure Vessel Code. II Materials Part C Part C Specifications for Welding Rods, Electrodes, and Filler Metals, USA,

ASTM International 2015., Standard Test Methods for Detecting Susceptibility to Intergranular Corrosion in Wrought, Nickel-Rich, Chromium-Bearing Alloys (ASTM G28-02), West Conshohocken, PA,

ASTM International 2020., Standard Test Methods for Pitting and Crevice Corrosion Resistance of Stainless Steels and Related Alloys by Use of Ferric Chloride Solution (ASTM G48-11 e1), West Conshohocken, PA,

Det Norske Veritas 2012. Submarine Pipeline Systems, Offshore Standard (DNV-OS-F101), Hovik, Norway,

Downloads

Published

2022-02-28

Issue

Section

Articles

How to Cite

ASSESSMENT OF CORROSION RESISTANT ALLOY (CRA) CLAD MATERIAL FOR GEOTHERMAL WELLHEAD PIPING SYSTEM . (2022). ASEAN Engineering Journal, 12(1), 207-219. https://doi.org/10.11113/aej.v12.16773