{"id":31757,"date":"2026-07-03T14:19:05","date_gmt":"2026-07-03T06:19:05","guid":{"rendered":"https:\/\/alllandpipes.com\/?p=31757"},"modified":"2026-07-03T14:21:34","modified_gmt":"2026-07-03T06:21:34","slug":"difference-between-erw-efw-pipe","status":"publish","type":"post","link":"https:\/\/alllandpipes.com\/ru\/blogs\/difference-between-erw-efw-pipe.html","title":{"rendered":"Difference Between ERW and EFW Pipe | Complete Welding Pipe Comparison Guide"},"content":{"rendered":"
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In steel pipe manufacturing, Electric Resistance Welding (ERW) and Electric Fusion Welding (EFW) are two widely used techniques for producing welded steel pipes. Although both fall under the category of welded steel pipes, they differ significantly in terms of welding principles, mechanical properties, diameter ranges, and industrial applications.<\/p>\n\n

For EPC contractors, oil and gas engineers, and steel procurement teams, understanding the differences between ERW and EFW pipes is crucial for selecting the appropriate piping for structural or pressure pipeline projects.<\/p>\n\n

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1<\/span>What is ERW Pipe? (Electric Resistance Welded Pipe)<\/a><\/span><\/div>\n
2<\/span>What is EFW Pipe? (Electric Fusion Welded Pipe)<\/a><\/span><\/div>\n
3<\/span>Size Range (OD & Wall Thickness) for ERW and EFW Pipes<\/a><\/span><\/div>\n
4<\/span>ERW vs EFW Pipe \u2013 Key Differences<\/a><\/span><\/div>\n
5<\/span>ERW vs EFW Pipe \u2013 Which One Should You Choose?<\/a><\/span><\/div>\n
6<\/span>Industry Standards for ERW and EFW Pipes<\/a><\/span><\/div>\n
7<\/span>Contact ALLLAND<\/a><\/span><\/div>\n<\/div>\n<\/div>\n\n

What is ERW Pipe? (Electric Resistance Welded Pipe)<\/strong><\/h2>\n\n

ERW (Electric Resistance Welded) pipe is produced by forming a steel coil into a cylindrical shape and welding the seam using high-frequency resistance heating and pressure forging, without the addition of filler metal.<\/p>\n\n

\"difference<\/div>\n\n

ERW Pipe Manufacturing Process<\/strong><\/h3>\n\n

\u0421\u0430\u0439\u0442 \u0422\u0440\u0443\u0431\u0430 ERW<\/a>\u00a0production process includes:<\/p>\n\n

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  1. Steel coil selection (API 5L<\/a> \/ ASTM \/ EN grades)<\/li>\n\n
  2. Slitting into strip<\/li>\n\n
  3. Cold forming into round pipe<\/li>\n\n
  4. High-frequency current heating at seam edges<\/li>\n\n
  5. Pressure roll welding (solid-state forging)<\/li>\n\n
  6. Cooling and sizing<\/li>\n\n
  7. Hydrostatic and NDT testing<\/li>\n<\/ol>\n\n

    Key feature: No melting of base metal \u2014 solid-state welding<\/strong><\/p>\n\n

    What is EFW Pipe? (Electric Fusion Welded Pipe)<\/strong><\/h2>\n\n

    EFW pipe (Electric Fusion Welded pipe) is manufactured by melting the base metal\u2014typically using filler metal\u2014via electric arc welding or submerged arc welding (SAW) to form a fully fused weld seam.<\/p>\n\n

    Types of EFW Pipe<\/strong><\/h3>\n\n

    \u00b7LSAW\u00a0Steel Pipe\u00a0(Longitudinal Submerged Arc)<\/p>\n\n

    \u00b7SSAW\u00a0Steel Pipe\u00a0(Spiral Submerged Arc)<\/p>\n\n

    EFW Pipe Manufacturing Process<\/strong><\/h3>\n\n

    Typical steps include:<\/p>\n\n

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    1. Steel plate selection<\/li>\n\n
    2. Plate forming into pipe shape (JCOE or spiral forming)<\/li>\n\n
    3. Edge alignment<\/li>\n\n
    4. Submerged arc welding (internal + external weld)<\/li>\n\n
    5. Full fusion of weld seam<\/li>\n\n
    6. Heat treatment (if required)<\/li>\n\n
    7. Hydrostatic testing and NDT inspection<\/li>\n<\/ol>\n\n

      Key feature: Full melting + fusion welding with deeper weld penetration<\/strong><\/p>\n\n

      Size Range (OD & Wall Thickness) for ERW and EFW Pipes<\/strong><\/h2>\n\n

      When selecting steel pipes for a project, one of the most significant differences between ERW and EFW (LSAW\/SSAW) pipes lies in their size range\u2014specifically, their outside diameter (OD) and wall thickness (WT).<\/p>\n\n

      ERW Pipe Size Range<\/strong><\/h3>\n\n

      ERW steel pipes are typically used for **small- to medium-diameter** piping systems.<\/p>\n\n

      \u2714 Outer Diameter (OD) Range<\/p>\n\n