In according with the property of T91 and to satisfy manufacture of super\|critical boiler, tests have be carried out for welding procedure and operating technical of batch small caliber tubes using T91.

The paper briefly described the design,construction technology and application effect of combined application of small diameter steel tube pile and consolidation grouting with field cases.

A Calculation of the Deformation Energy of the Electrosparking Expansion Joint of the Heat Exchange Equipment With Small-Caliber Tubes;

4 Dongguang Waterworks, an introduction was given to the selection of pipe jacking system, measures for resistance alleviation, application of intermediate jacking room, and control of axes in jacking construction of long distance steel pipe with large caliber, these may provide the reference for the construction of resembling project.