{"product_id":"l52249-failure-initation-modes-of-pipe-with-high-charpy-transition-temperature-2","title":"L52249 Failure Initation Modes of Pipe with High Charpy Transition Temperature","description":"\u003cp\u003eThis report presents a methodology that determines the lowest temperature where ductile fracture would occur for either sharp cracks or blunt corrosion flaws in older low-toughness line pipe base metals. It is applicable to either axial or circumferential flaws in pipes under quasi-static loading, i.e., normal operating conditions with no sudden transient loads. The results showed that ductile initiation of a surface crack can occur at a significantly lower temperature than the Charpy transition temperature. A master curve of transition temperatures for different pipe thickness and crack geometries was developed and validated on 1927 and 1948 vintage pipes. The master-curve of transition temperatures comes from accounting for thickness effects, loading-rate effects, and constraint effects (for a surface crack) on the transition temperatures of the flawed pipe relative to the Charpy transition temperature. These transition temperature shifts were empirically determined from hundreds of past full-scale tests and literally thousands of laboratory tests, and then checked against data developed on much older vintage line pipe steels, i.e., the 1927 and 1948 pipes in this project.\u003c\/p\u003e","brand":"PRCI Store","offers":[{"title":"Default Title","offer_id":44367572140110,"sku":"208143","price":1795.0,"currency_code":"USD","in_stock":true}],"url":"https:\/\/prci-store.myshopify.com\/products\/l52249-failure-initation-modes-of-pipe-with-high-charpy-transition-temperature-2","provider":"PRCI Store","version":"1.0","type":"link"}