difference between seamless and welded pipes 2

In order to know whether seamless or welded pipe can be used in your application you should consult the governing code for the construction. The difference between welded and seamless pipe as far as performance is basically none from a practical standpoint. There are two primary means of manufacturing welded pipe there is Electric Resistance Welding (ERW)small and large diameter and Double Submerged Arc Welded(DSAW)mostly large diameter. There are some issues involved with the quality of welding that can come into play with both welding processes and should be considered when making the purchase. Theses issues can be addressed with the mill if you are purchasing a large order. (Mechanical testing and NDT, third party monitoring of manf.) There are also quality issues with seamless pipe that can be addressed the same way. The key to knowing if the pipe you are purchasing is of good quality is to test it. There are third parties that can perform testing of welded and seamless pipe that you may purchase from a supplier's "on the ground" stock. Let me know if I can give more info.

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