Structural Characteristics
The main characteristic of butt-welded eccentric reductor is its eccentric structure, that is, the large end and the small end of the tube are not on the same axis, but have some deviation. This design makes it possible to keep the tube at a certain angle or offset before and after the connection, so that it can meet the special installation requirements.The joint is connected by the butt weld, that is to say, the connection between the pipe and the accessories is realized by welding. The joint is of high strength and good sealing performance, and can be used in high pressure, high temperature and so on.
Technical Drawings
Standard drawing of ASME B16.9 Lap Joint Stub End.
The lap joint stub end is required when attach the lap-joint flange to the piping system. The stub end and lap-joint flange assembly are used mainly in piping systems that necessitate frequent dismantling for inspection or routine maintenance. It is also used in the erection of large diameter or hand-to-adjust piping configurations because of the assembly's quick bolt hole alignment. ASME B16.9 has classified two types of lap joint stub ends: long pattern and short patterm.
* NOTES:
(1) Gasket face finish shall be in accordance with ASME B16.5 for raised-face flanges.
(2) The lap thickness, T, shall not be less than nominal pipe wall thickness.
