Structural Materials Used for Steam Pipelines in Power Industry

• Autorzy: Mężyk D.
• Języki publikacji: EN

Abstrakty

EN

The study presents some strength parameters of structural materials, including steel grades 13HMF, P91 and P92, currently used in professional power engineering to produce pipelines, boiler super-heaters, steam tanks, steam pressure tanks and pipelines designed to operate at the temperature range up to 650o C. The author presented results of material stress tests performed by him for pipelines in as-delivered state as well as after 40 000 hours of operation. The tests were made using Mathar strain gauge method. Hardness test results for areas subjected to strain gauge tests and structural changes of tested samples are also presented. Stress test results indicate stress increase for operated material as well as for grain size growth compared to as-delivered material. It is caused by operating load (both thermal and mechanical) of the pipeline material.

Słowa kluczowe

EN

degradation; microstructure; stress; pipeline

• Wydawca: Politechnika Gdańska
• Czasopismo: Advances in Materials Science
• Rocznik: 2010
• Tom: Vol. 10, nr 4(26)
• Strony: 55--62
• Opis fizyczny: Bibliogr. 6 poz., rys., tab.

Twórcy

autor

Mężyk D.

• Institute of Power Engineering, Warsaw, Poland,

Bibliografia

• 1. Mężyk D. The effect of pressure installation operation course in professional power sector on safety and reliability of their performance]. Conference Materials: Training seminar on development of material damage and laser-induced material modification, IPPT PAN Polish Academy of Sciences 2003, 193 – 204.
• 2. Hald J. Microstructure stability of steels P92 and P122, Proceedings of the 3rd Conference on Advances in Materials Technology for Fossil Power Plant, University of Wales, Swensea, 2001, 115 – 125.
• 3. Ennis P. Creep Strengthening Mechanisms in High Chromium Steels. Proceedings of the 3rd Conference on Advances in Materials Technology for Fossil Power Plant, University of Wales, Swensea, 2001, 187 – 197.
• 4. Middleton C. J., Brear J.M., Munson R., Viswanathan R. An assessment of the risk of Type IV cracking in welds to header, pipework and turbine components constructed from the advanced ferritic 9% and 12% chromium steel. Proceedings of the 3rd Conference on Advances in Materials Technology for Fossil Power Plant, University of Wales, Swensea, 2001, 69 – 79.
• 5. PN-79/M-34033 – Water and steam pipelines. Pipe wall thickness calculations.
• 6. PN-92/M-34031 – Hot water and steam pipelines. General requirements and testing procedures.