304 stainless steel seamless pipe due to internal thermal stress caused by a thermal embrittlement of 304 stainless steel seamless pipe at the seams due to different coefficients of expansion eye when heated produce a lot of heat stress, especially during rapid temperature changes due to thermal shock like steel quenching crack will produce the same phenomenon.
At ordinary temperature change dozens or hundreds of times repeated heating will also produce thermal fatigue cracking. But as a high temperature and fatigue, which is designed at high temperatures due to external load variations caused, while the former is as a thermal temperature changes due to internal thermal stresses caused by embrittlement.
304 stainless steel seamless pipe stress corrosion engineering accident, after macroscopic examination, summary, subject only local pipe section stress corrosion damage of equipment and components from corrosion (stress corrosion cracking and pitting, crevice corrosion), and no significant general corrosion. Even when subjected to very severe stress corrosion damage of equipment is no exception. In some media, sometimes both severe stress corrosion (or accompanied by severe pitting), there are very serious general corrosion.
Post time: Aug-23-2019