1 / 7

Advanced Design Methodologies for High Strength Steel in Pressure Equipment Manufacturing

This report outlines the objectives and methodologies utilized to adapt current design codes for high strength steels (HSS) in pressure vessel (PV) manufacturing. It highlights the challenges faced by manufacturers, such as post-weld heat treatment (PWHT) and weld cracking issues. The work program includes a literature survey, prototype design for experimental validation, and detailed testing protocols. Results from a broad industry inquiry are discussed, alongside recommendations for future work and standardization efforts. The final report will aid regulatory bodies in improving design practices.

aelwen
Download Presentation

Advanced Design Methodologies for High Strength Steel in Pressure Equipment Manufacturing

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. Appendix 4 (p. 1/7) HSD« ADVANCED DESIGN METHODOLOGIES TO EXPLOIT HIGH STRENGTH STEELS FOR PRESSURE EQUIPMENT MANUFACTURE »DGIII Contract Nr. 501983following an EPERC TTF2 EOI (January 1999 – February 2001)co-ordinators: C. Boucher, A. Michel (IS)partners:IS, G.Baylac, EMD (ARMINES), A&AB(TUW) EPERC TTF2 annual meeting – Milano November 2000

  2. Appendix 4 (p. 2/7) Objectives • To demonstrate the present design codes may be adapted to allow for benefitting of the improved properties of fine grained TMCP and QT steels • To provide informations to DGIIIaiming at preparing recommendations for further work in support of standardisation EPERC TTF2 annual meeting – Milano November 2000

  3. Appendix 4 (p. 3/7) Work programme • Enquiry on the use of HSS for PV manufacturing - literature survey and dissemination of a questionnaire to help to identify the needs • Design of prototypes (welded and non-welded PV) for the experimental validation of the design code deviation • DBA and DBF, fitness for purpose assessment • Experimental validation (fatigue tests and burst tests) • Reporting and Recommendations EPERC TTF2 annual meeting – Milano November 2000

  4. Appendix 4 (p. 4/7) Enquiry results • 46 answers over 90 (60 companies) • Main difficulties faced by the manufacturerswere identified: • PWHT (new fabrication and repair) • HSS weld cracking • procurement (flanges and fitting) • etc. EPERC TTF2 annual meeting – Milano November 2000

  5. Appendix 4 (p. 5/7) • Most relevant problems addressed: • PWHT: no PWHT after cold forming or for tempering and stress-relieving purpose • Procurement: use of standard normalised currently available flange and fitting • Prototypes for testing: • Sphere in TMCP steel – 460 MPa YS - 35 mm thick (as cold worked, no stress relieving) • Cylindrical shell in QT steel – 500 MPa YS - 25 mm thick (as cold worked, no temper) • Un-welded forged buffer vessel and screwed -in flat ends hydraulic accumulator in 34CrMo4 QT steel EPERC TTF2 annual meeting – Milano November 2000

  6. Appendix 4 (p. 6/7) Welded PV testing A detailed testing protocol has been defined (the ECOPRESS project co-ordinator participated to the protocol definition) : • NDT • quasi-burst test • NDT • put artificial defects (spark-machining) in the most critical areas according to DBA • fatigue testing (Ds= 0 – Pd), 500 cycles minimum life • NDT EPERC TTF2 annual meeting – Milano November 2000

  7. Appendix 4 (p. 7/7) Future work • Pressure test completion • Final report – recommendations to DGIII (by February 2001) • Co-ordination vs. ECOPRESS • Dissemination (EPERC, CEN, AFIAP conf. 2001…) EPERC TTF2 annual meeting – Milano November 2000

More Related