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The Development of Tees
Posted: 06/28/2022 10:20:38 Hits: 10A tee is an important part of the pressurization and conveying system of aircraft such as launch vehicles. It has functions of gathering and diversion of the multi pipes in the overall system. However, in the actual flight process, it is subject to certain pressure and structural stress. The quality... -
Advantages of Hydroforming Pipe Fittings
Posted: 06/15/2022 11:40:06 Hits: 11With the improvement of science, technology and productivity, the development and progress of the manufacturing industry to the intelligent manufacturing industry, various industries are undergoing rapid changes, showing the power of China to the world and making intelligent manufacturing go global,... -
The Connection between Reducers of Heat Exchangers & Dissimilar Steel Pipes
Posted: 05/23/2022 08:46:28 Hits: 3Formulating the construction plan 1. Principles of welding carbon steel 20 and stainless steel 304 dissimilar steel According to the analysis of the weldability of austenitic stainless steel 304 and ferritic carbon steel 20 dissimilar steel, hot cracks easily happen when the two are welded, and the... -
The Connection Scheme between Reducers of Heat Exchangers and Pipes
Posted: 05/09/2022 07:45:34 Hits: 16Abstract: When a chemical plant is overhauled, two sets of overlapping fixed tube sheet heat exchangers are replaced. The carbon steel flanges at the inlet and outlet of the tube box are of different materials and specifications than the external stainless steel pipelines. In order to ensure that the... -
Materials of Pipe Fittings for Resisting Hydrogen Sulfide Stress Corrosion
Posted: 04/22/2022 09:27:49 Hits: 7For the selection and evaluation of materials used in equipment designed and manufactured according to the elastic design criteria, the materials that have been evaluated in accordance with ISO 15156-2 (GB/T20972.2) and ISO15156-3 (GB/T20972.3) or NACE MR0175-2003 standards can be used. The environmental... -
Types and Failure Modes of Gaskets
Posted: 04/16/2022 10:09:48 Hits: 60Generally, there are three main leakages for fluids at the sealing port, including leakages at the interface, leakages caused by penetration, and leakages caused by a blow-out, as shown in Figure 1. The leakage at the interface is the leakage along the gap between... -
The Failure Analysis of the Stainless Steel TP304 Tee (Part Two)
Posted: 03/30/2022 02:38:49 Hits: 31.4 The microstructure analysis Take another batch of the qualified tees with the same specification to compare with the cracked tees, and the sampling positions are the positions perpendicular to the main pipe axis and close to the root of the branch pipe. Figures 4a and 4b are the metallographic... -
The Failure Analysis of the Stainless Steel TP304 Tee (Part One)
Posted: 03/08/2022 09:58:56 Hits: 4Abstract: The stainless steel TP304 tee used in the denitration facility of the power plant cracks. Through the composition analysis, the macroscopic and microscopic analysis of the fracture, the microstructure observation and the hardness test, combined with the production... -
Research on Cold & Hot Forming of S31254 180° Elbows
Posted: 02/23/2022 08:14:42 Hits: 6Abstract: The S31254 180° R=1D sharp turning elbow used in the high-temperature pyrolysis furnace of a company in the United States is currently manufactured by the casting process, and the steel pipe's manufacturing process is now used as the research object. The research... -
Leakages at the Connecting Part Between Flanges & Reducers in Quench Boilers
Posted: 01/25/2022 07:25:15 Hits: 7Abstract: Since April 2016, there have been frequent leaks and fires at the connecting part between the flange and reducer of the cracking furnace quench boiler in 220 kt/a ethylene unit of China National Petroleum Dushanzi Petrochemical. Through various inspections and analyses, it is...