Design and strength calculation of the down-tail tube in the hydrogen manufacturing converted furnace;

Property changing,the original welding defect and local stress concentration caused by the unbalanced force on lifting shelf as well as the long period service can cause unpredicted random breaking of the primary reformer pigtail To replace part of the pigtail pipeline combined with strict welding process can control the breaking of the pigtai

In order to study the possility of life extension of pigtails in a fertilizer plant , whichhas been in service for 80,000 hours and has been operated for another 30,000 hours after regenera-tive solution heat-treatment,the microstructures and mechanical properties of the pigtail material Alloy800H are analyzed in the present work.

Objective: To illustrate the treatment of malignant pericardial effusion by subxiphoid percutaneous pericardial pigtail catheter drainage and intrapericardial chemotherapy as a safe, effective and practical method.