{"product_id":"ng-18-185-r01-stress-corrosion-crack-growth-model-development-1","title":"NG-18-185-R01 Stress Corrosion Crack Growth Model Development","description":"\u003cp\u003eHydrostatic retesting is a practical technique for remov1ng colonies of stress-corrosion cracks from gas lines before service failures occur. However, at present operators have no sound basis for choosing a retest interval. Rather, they use arbitrary schedules that have little grounding in the actual processes of crack growth. Thus, the current practice may for some lines be overly conservative while being totally inadequate for others.\u003c\/p\u003e\n\n\u003cp\u003eSince some cracking may survive a hydrostatic test, the ideal retest interval should be just shorter than the time needed for those remaining cracks to reach a critical size for failure at the service pressure. Thus, a long interval heightens the risk of service failure while a short interval may be considerably less than the time needed to develop critically sized flaws.\u003c\/p\u003e\n\n\u003cp\u003eThis report describes the progress toward the development of a predictive model for calculating crack growth and estimating retest intervals. The development of a model is continuing, so this represents a progress report.\u003c\/p\u003e","brand":"PRCI Store","offers":[{"title":"Default Title","offer_id":44361846816846,"sku":"219570","price":2875.0,"currency_code":"USD","in_stock":true}],"url":"https:\/\/prci-store.myshopify.com\/products\/ng-18-185-r01-stress-corrosion-crack-growth-model-development-1","provider":"PRCI Store","version":"1.0","type":"link"}