Inspectioneering

Integripedia Topic
Creep and Stress Rupture

Explore this topic

Creep is the time-dependent deformation of a material under load. It is a generally slow developing form of degradation occurring in metals under stress and higher pressures. The amount of creep deformation that will be experienced is highly dependent upon the level of stress, level of temperature, and material properties of the metal. Deformations caused by creep eventually cause damage that may result in a rupture of the affected equipment components. Commonly susceptible equipment includes nozzles and other components with high tri-axial loading on some catalytic reformers, furnace components, and dissimilar metal welds.

Inspection for creep damage is not straight-forward and may require several techniques to be used in combination. While the use of ring gauges for bulges in furnace tubes is fairly widespread, in other cases, a combination of surface and volumetric NDE may be required, along with metallographic samples (destructive & non-destructive) to verify the presence of creep damage.

Topic Tools

Share this Topic

Contribute to Definition

We welcome updates to this Integripedia definition from the Inspectioneering community. Click the link below to submit any recommended changes for Inspectioneering's team of editors to review.

Contribute to Definition
Articles about Creep and Stress Rupture
July/August 2019 Inspectioneering Journal

Gasification technology has emerged in oil and gas due to the high combustion energy of Syngas and less environmental concerns than flue gas. This article discusses proper inspection and corrosion monitoring techniques for gasification units.

July/August 2019 Inspectioneering Journal

This is the second of a two-part column on “Creep.” This second part discusses the approach to creep assessment in plant equipment.

Authors: Greg Garic
May/June 2019 Inspectioneering Journal

This is the first of a two-part column on “Creep”. It presents an engineering overview of the phenomena, answers the question: “What is Creep?”, and provides readers with foundational knowledge for evaluating and managing remaining...

Authors: Greg Garic
July/August 2018 Inspectioneering Journal

API 579-1 is a complex document covering several different types of equipment that may contain flaws or damage. Due to its complexity, this article condenses it into six things you need to know.

Authors: Greg Garic
September/October 2017 Inspectioneering Journal

Fired heaters are among the most critical equipment in refineries and chemical plants. This article provides an overview of what a fired heater tube mechanical integrity program should include.

Partner Content

Traditional, paper-based inspection processes can prevent plants from being as effective as they can be. By digitalizing your mechanical integrity process and data with MISTRAS Digital®, plants have realized up to 75% gains in IDMS data entry and...

July/August 2016 Inspectioneering Journal

This article summarizes a recent finite element analysis (FEA)-based study that employs creep simulation techniques to investigate the elevated temperature response of piping with peaked longitudinal weld seams.

January/February 2015 Inspectioneering Journal

Avoiding cracking under pressure when managing high-energy piping systems is common subject matter in the power industry. Just as high-energy piping can give way to pressure, stress and fatigue, so can the people in charge of operating them when...

Authors: Pamela Hamblin
January/February 2014 Inspectioneering Journal

Fired furnaces in the petrochemical and refining industry are critical pieces of equipment that can have a major impact on process unit safety, reliability, and economics. They are complex pieces of equipment, where tubes and other pressure boundary...

Authors: Antonio Seijas
September/October 2005 Inspectioneering Journal

Metals will slowly deform under stress and higher temperatures by the mechanism known as creep. The amount of creep deformation that will be experienced is highly dependent upon the level of stress, level of temperature and material properties....

Authors: John Reynolds
November/December 1999 Inspectioneering Journal

Steam reformers are an integral part of ammonia, methanol, hydrogen, and gas process plants around the world. THey are one of the highest cost, both in capital and maintenance, pieces of equipment in the plant. Typically, reformers contain several...

May/June 1997 Inspectioneering Journal

Reformer catalyst tubes are commonly manufactured from high strength, creep and corrosion resistant alloys. They are relatively thick walled and are usually produced by centrifugal casting. Their lives are limited by creep, driven by a combination...

    Downloads & Resources related to Creep and Stress Rupture
      News related to Creep and Stress Rupture

        Inspectioneering Journal

        Explore over 20 years of articles written by our team of subject matter experts.

        Company Directory

        Find relevant products, services, and technologies.

        Talent Solutions

        Discover job opportunities that match your skillset.

        Case Studies

        Learn from the experience of others in the industry.

        Integripedia

        Inspectioneering's index of mechanical integrity topics – built by you.

        Industry News

        Stay up-to-date with the latest inspection and asset integrity management news.

        Blog

        Read short articles and insights authored by industry experts.

        Expert Interviews

        Inspectioneering's archive of interviews with industry subject matter experts.

        Event Calendar

        Find upcoming conferences, training sessions, online events, and more.

        Downloads

        Downloadable eBooks, Asset Intelligence Reports, checklists, white papers, and more.

        Videos

        Watch educational and informative videos directly related to your profession.

        Acronyms

        Commonly used asset integrity management and inspection acronyms.