Integrity analysis of a vessel subject to weld repair and post-weld heat treatment: Thermal stress distribution using numerical approach

Ardiyansyah Yatim, Gatot Prayogo, Ahmad Karayan, Hendra Novi, Wildan Hamdani, Sahrudin Tambunan, Rahmat Burhanuddin

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Here, we present a numerical approach to analyze the integrity of a vessel that was subject to a weld repair. A Post-Weld Heat Treatment (PWHT) process was implemented to a vessel undergone weld repair due to leakage. Due to the thick wall of the welded bottom head, this welding process must be followed by the PWHT to relieve the residual stress, as well as to improve the material properties. PWHT process was performed by heating the welded area to reach 675 °C temperature. A numerical approach using finite element analysis (FEA) method was performed to analyze the integrity of the vessel. Based on the analysis, the structure is still stable within the applied load. PWHT process does not lead to buckling on the main structure and the load is still lower than the load required for the occurrence of buckling. A sensitivity analysis was also performed with reduced temperatures to 630 °C or reduction of PWHT area width. These changes were found to have negligible effects in reducing the stress and strains in the vessel. After PWHT is completed, the structure is still considered to be safe to be operated, as indicated by its strain that is still below the allowable strain and only relatively small deflection was occurred.

Original languageEnglish
Title of host publicationAdvanced Materials Research QiR 16
EditorsAnne Zulfia, Wahyuaji Narottama Putra
PublisherTrans Tech Publications Ltd
Pages348-355
Number of pages8
ISBN (Print)9783035715996
DOIs
Publication statusPublished - 2020
Event16th International Conference on Quality in Research, QiR 2019 - Padang, Indonesia
Duration: 22 Jul 201924 Jul 2019

Publication series

NameMaterials Science Forum
Volume1000 MSF
ISSN (Print)0255-5476
ISSN (Electronic)1662-9752

Conference

Conference16th International Conference on Quality in Research, QiR 2019
CountryIndonesia
CityPadang
Period22/07/1924/07/19

Keywords

  • FEA
  • Post-Weld Heat Treatment
  • Thermal Stress
  • Vessel

Fingerprint Dive into the research topics of 'Integrity analysis of a vessel subject to weld repair and post-weld heat treatment: Thermal stress distribution using numerical approach'. Together they form a unique fingerprint.

Cite this