![]() 11 Wall Thickness Seamless pipes have inconsistent wall thickness across the length, thicker so heavier Wall thickness for welded pipes is more consistent than seamless ones, thinner 12 Ovality Seamless pipes provide better ovality, roundness Welded pipes provide poor ovality and roundness as compared to their seamless counterpart. Readily available for various different materials shorter delivery time. 10 Availability Less availability, limited material types, longer delivery time. 9 Application Seamless pipes are widely suitable for high pressure, temperature, and corrosive environment Welded pipes are normally used for less corrosive and low-pressure environments. 8 Tests Seamless pipes do not require testing for weld integrity. ![]() 6 Economy Costlier More economic 7 Production Process The production process of seamless pipe is quite complex with a long procurement lead time The welded pipe production process is comparatively simpler with a short procurement lead time. ![]() 5 Surface Quality The surface quality of seamless pipes is rough due to the extrusion process Welded pipes have a smooth high-quality surface as compared to seamless pipes. The weld areas of the welded pipes are more prone to corrosion attacks, which means less corrosion resistance. 4 Corrosion Resistance Sealless pipes are less prone to corrosion means more corrosion-resistant. There is no such size restriction on welded pipe production. 3 Size Seamless pipes are usually manufactured for a nominal size of 24 inches or less. Welded pipes can be manufactured in long continuous lengths. 2 Length Seamless pipes are relatively shorter in length due to manufacturing difficulties. Due to welding, welded pipes are believed to withstand 20% less pressure and load as compared to seamless pipes. No Parameter Seamless Pipe Welded Pipe 1 Strength Seamless pipes are able to withstand more pressure and load as there is no weak seam. The other differences are listed in the below-attached table. 1: Welded vs Seamless Pipe manufacturing Seamless vs Welded Pipeįrom the above paragraphs, it is obvious that seamless and welded pipes differ in their manufacturing process.
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