Welding connection valves

Welding connection valves are suitable for all kinds of pressure and temperature, under the condition of the load moment when using, more applicable than the flange connection.But welding connection valve disassembly and difficult to install, so its use is limited to can normally run for a long time, or use the conditions of Dutch engraved, high temperature occasion.Such as coal-fired power stations, nuclear power engineering, ethylene project on the pipeline.Under 50 mm nominal diameter welding valve usually with welding socket to carry on the charge of the pipeline on plane.Because the socket welding forming gap between the pin and pipeline, thus has the potential to crack corrosion by some media, at the same time, the vibration of the pipeline can make the connection part fatigue, so the application of the socket welding by certain restrictions.Lotus engraved in nominal diameter is bigger, use condition, higher temperature, the body is often used for welding groove, at the same time, the butt joint with the original requirements, the welders must choose very skillful to complete the job.

(source:http://www.kg-machinery.com/news/welding-connection-valves.html)