Using level 2 assessment procedures of locally metal loss in API 579,the calculation methods of remaining strength factor(RSF) are studied for cylindrical shells with ellipsoidal and spherical pits,convenient calculation formulas are established.

Using level 2 assessment procedures of locally thin area (LTA) in API 579, the calculation methods of remaining strength factor (RSF) are offered for spherical shells with outer and internal spherical pits, respectively.

Assessment method for remaining strength of corroded pipeline and its application;

Theory foundation for remaining strength assessment methodology is presented and assessing formula for relative assessment methodology is educed based on individual basic assumption.

API 579 and F101 are two kinds of common codes in computing the remaining strength of corrosion pipeline for local metal loss.

Residual Intensity Assessment of Liquid Ammonia Tanks;

Residual Intensity Evaluation after Corrosion of the Heater Tubes for Natural Gas and Life-Span Prediction

The near infrared spectra of sunlight or moonlight passing through atmosphere were measured by a CCD spectrometer in the instrument,then the central residual intensity of the water vapor absorption at 935 nm waveband was calculated and the total precipitable water in the atmosphere was derive.

Relationship between mass variation and residual strength change with temperature on 3D C/SiC composites in oxidizing atmosphere;

Analysis on wear depth and residual strength of downhole casing;

Analysis on residual strength after casing surface wear caused in casing drilling;