Gulf Interstate Engineering Co. is providing engineering and design services on Marathon Petroleum Company, L.P.’s Utica Condensate Gathering Pipeline project. Gulf is developing the conceptual engineering design for the 40-45 mile condensate trunkline system and the associated meter stations and pump stations in Ohio.
Part 2: Low Temperature Ductility And Ductile Crack Arrest Properties Of High Strength Low Alloy Steel
We stated in Part 1 of this two-part series that one of the most critical decisions in pipeline design is the quality of steel. We also discussed the importance of steel quality in terms of the quality of pipe. Pipe, after all, is a dimensional aspect of material and, for this discussion, the material is steel. The discussion on steel making especially focused on low-temperature ductility and steel’s ability to resist initiation and arrest of ductile cracks.
The emergence of micro-alloyed, high strength steel in pipeline applications has opened opportunities for more specialized studies of low-temperature ductility loss and the possibility of crack development. We will discuss the subject further in still more stringent design conditions that challenge engineers and operators.
Hydrogen sulfide (H2S) gas, also known as sour gas or sulfuretted hydrogen, is possibly the second-most deadly gas after carbon monoxide that man can encounter in the industrial environment. Common in all sectors of the petroleum industry, this gas can be found in any location where decaying matter is present.
The selection of material for any specific environment is directly dependent on the material’s properties, especially those properties that are affected by that special environment.
Considering negative reports on the nation’s economic status, pipeline construction in the U.S. is experiencing a healthy market as operators and producers continue stepped-up activity supported by projects to move natural gas to the Midwest and the East Coast from Mid-Continent shale plays and the Rocky Mountains.