![]() 10 Availability Less available, limited material types, longer delivery time Readily available for various different materials shorter delivery time 11 Wall Thickness Inconsistent wall thickness across length, thicker so heavier Wall thickness more consistent than seamless ones, thinner 12 Ovality Better ovality, roundness Poor ovality and roundness as compared to seamless counterpart. 9 Application Suitable for high presure temperature and corrosive environment Normally used for less corrosive and low pressure environment. 8 Tests Seamless pipes does not require testing for weld integrity. 6 Economy Costlier More economic 7 Production Process Complex, long procurement lead time Simpler, short procurement lead time. 5 Surface Quality Rough due to extrusion process Smooth high quality surface as compared to seamless pipe. Weld areas are more prone to corrosion attacks, means less corrosion resistance. 4 Corrosion Resistance Less prone to corrosion, means more corrosion resistant. 3 Size Manufactured for nominal size 24 inch or less. Can be manufactured in long continuous lengths. 2 Length Relatively shorter in length due to manufacturing difficulties. ![]() Due to welding they are believed to withstand 20% less pressure and load as compared to seamless pipe. No Parameter Seamless Pipe Welded Pipe 1 Strength 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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