When to use forgings for pipe fittings and when to use seamless ones?

Generally speaking, your seamless fittings are made of forgings; the two issues are related to the same concept. Forged pipe fittings are seamless pipe fittings. So, answer your question by considering whether there are seams or not: 1. Technically, when used with highly toxic, flammable, high-pressure, and high-temperature media, it is preferable to choose forged seamless versions in accordance with the relevant standards. 2. Economic considerations: Seamless pipe fittings are expensive. For ordinary projects, the design institute will, based on the client’s requirements or cost controls, determine a specific diameter or material range, and decide whether to use seamless or welded pipes. 3. Manufacturing capacity: Generally speaking, for thick-walled seamless pipes, DN600 represents the limit; for larger diameters, due to constraints in forging capabilities, few manufacturers are able to produce them. Moreover, thin-walled seamless pipes are difficult to manufacture when the wall thickness is too thin and the diameter is too large. Follow the WeChat official account of Pressure Pipeline People; it contains a lot of such knowledge.

Forged for DN50 and below, seamless for DN50 and above.