Often the stresses in pipe are combined into a measure calledequivalent stress. This is determined using the Von Mises equivalent stress formula which is shown in Eq.(1.9): (1.9)σe=σl2+σh2−σlσh+3τc2 wher
Empty CellHoop StressLongitudinal StressEquivalent Stress Oil and gas pipelines, liquid hydrocarbon piping 0.72 0.80 0.90 Risers on nonproduction platforms 0.60 0.80 0.90 Gas piping, gas risers on production platforms 0.50 0.80 0.90 Source: Originally from ASME B31.4 and B31.8. kT = temperature der...
The distribution of hoop siress calculated and simulated by Finite Element Method and theoretical calculation in this paper, when the hydrostatic pressure was carried out on the line pipe of 桅 762mmx31.8 mm API SPEC 5L[1] X70 longitudinal seams submerged arc welding(LSAW). The results of ...
stress of the surrounding rock of geological stress field in different circumstances, programme is developed to compute the corresponding tangential stress of the surrounding rock of several underground plants, for instance, Ertan project of Sichuan according to different directions of longitudinal axle. ...