For reliability and safety issues of injection wells, corrosion resistance materials used needs to be determined. Herein, representative low-cost materials, including carbon steel X70/1.8977 low alloyed 1.7225, were embedded in mortar mimic the realistic casing-mortar interface. Two types cement investigated: (1) Dyckerhoff Variodur commercial Portland cement, representing a highly acidic resis...

The hydrogen embrittlement (HE) leads to severe steel degradation of mechanical properties. atoms diffuse into the and get positioned reversible irreversible trap sites. pipe transport oil gas needs be welded construct long-distance pipeline projects; thus, friction-stir welding (FSW) has proven an excellent alternative joining these pipelines. Therefore, this work assessed analyzed influence o...

Natural gas transmission pipelines installed in seismic and permafrost regions are vulnerable to cyclic loads with a large strain amplitude. Under these conditions, the pipe may fail extremely low cycles, situation which is also known as cycle fatigue (ELCF) failure. The fracture mechanism of ELCF shows significant difference that fatigue, life usually deviates from Coffin–Manson law. Thus, it ...