The result showed that the crack of feed-water pipe saddle was a delayed crack,because welding procedure code didn\'t control well,carbon equivalent of welding components have obvious quench trend and welding didn\'t avoiding hydrogen treatment,welding structure and larger thickness of welding components occured constrain stress etc.

Based on analysis of the characteristic,shape of squeeze roller and the prevention and cure of "grain inheritance" and dehydrogenation of the heavy squeeze roller made of 42CrMo steel,the heat treatment process including one time of pretreatments,two times of preheating,two times of normalizations,three times of bainite isothermal treatment and one time of dehydrogenation,was proposed.

In the case that the dehydrogenation is not sufficient, the residual hydrogen led to the spring hydrogen-induced delayed fracture.

Risk analysis and safety measures of chlorine and hydrogen treatment;

Application of ASPEN PLUS in chlorine-alkali engineering design — Development of imitiative process of chlorine and hydrogen treatment;

Control difficulties in procedure of chlorine and hydrogen treatment and the countermeasures

The study on properties and structure changes of residue during hydrotreating;

Distribution and removal of sulfur during hydrotreating of residue;

Research on slight expanded-bed oil residue hydrotreating reactor;

Development and Commercial Application of VGO Hydroprocessing Technology for FFHT Wax;

Application of circulating hydrogen oil washing in lube oil hydroprocessing unit;

On the basis of compositional characteristic and product demand of naphthenic base crude oil, a series of lube oil hydroprocessing technologies were developed successively by RIPP, such as hydro-deacid, medium pressure hydrotreating, hydrodewaxing and high-pressure hydrotreating.