1 / 13

Advanced Composite Repairs for Industrial Maintenance

Learn about modern non-metallic technology for plant, pipework, and vessel maintenance. Prevent corrosion and defects, restore wall strength, and ensure safety. Explore global standards and design processes to ensure reliable repairs.

emosley
Download Presentation

Advanced Composite Repairs for Industrial Maintenance

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. COMPOSITE REPAIRS • Modern, non-metallic technology to assist in operational plant, pipework, vessel and pipeline maintenance

  2. COMPOSITE REPAIRS • Corrosion Prevention • Proactive leak prevention • External & Internal Defects

  3. COMPOSITE REPAIRS • Return to original wall strength and integrity • Contain Design Pressure • Prevent through wall defects leaking • Repair non linear geometries

  4. Standardisation • Global JIW including Saudi Aramco, Shell, BP, Petrobras, Total, Statoil, Amerada Hess and British Gas • UK Document AEAT 57711 • ISO 24817 • ASME PCC2

  5. Standardisation Standards all cover: • Design • Installation

  6. Design Process Client supplies information on critical parameters: • Diameter • Pressure • Original Wall Thickness • Temperature • Life Expectancy • Defect measurements

  7. Design Process • Based on Barlow • P=2st/D Pressure is proportional to the material strength, its thickness and the pipe diameter

  8. Design Process Three basic cases considered • Remaining wall thickness carries some of the load • Composite carries all the load • Through wall defect

  9. Design Process - Factors A number of factors is applied to increase repair thickness • fc - a service factor to account for cyclic fatigue • foverlay - derates the repair in the case of insufficient space in applying the composite • fstress - derates the repair when stress is present due to components (tees, bends, reducers) • fT - temperature effect on composite allowables

  10. Design Process - Limitations • Repair scenarios are in 3 Classes depending on temperature, pressure and service • Repair must not be exposed to temperatures greater than Tg - 30 • Repair thickness greater than 25mm is unlikely to be useful because of laminate instability • Internal defects that will result in WT <1mm during repair lifetime, treated as through wall

  11. Installation • All repairs must be applied by trained and certified applicators • For each repair situation a risk assessment shall be carried out • Each repair should be covered by a method statement that addresses each of the main procedures to be carried out • Surface preparation is the single most important operation in the achievement of a successful repair

  12. Installation The key hold points to be observed during a repair are dependent on the repair class and should include: • Method Statement • Materials Preparation • Surface Preparation • Tests on Repair Laminate, to include cure, thickness and dimensions • External inspection

  13. Installation • A logbook should be opened for each repair and retained for its service life • Health and safety issues should be fully addressed in the risk assessment and repair method statements

More Related