Can ERW pipe be used instead of CEW pipe?

Can ERW pipe be used instead of CEW pipe?  For general piping and structural use, yes. For applications needing tight dimensional tolerance or a precision bore finish — such as hydraulic cylinders — standard ERW pipe usually won't meet the requirement, and CEW pipe (or DOM pipe) should be specified instead.

ERW Pipe vs CEW Pipe: Quick Comparison

Why the Extra Cold Drawing Step Matters

The table above shows what differs; this is why it differs, and where each pipe actually earns its keep.

Cold drawing doesn't just shrink the diameter — it works the steel further, which is what tightens dimensional tolerances (CEW pipe typically holds tolerances several times finer than as-welded ERW pipe of the same size, per EN 10305-2), smooths the bore and OD surface, and changes the mechanical properties: depending on delivery condition, CEW pipe can be supplied as-drawn (higher yield strength, lower elongation) or annealed/normalized (lower strength, higher elongation, better suited to further forming or bending). Standard ERW pipe, by contrast, is supplied in a single as-rolled condition and doesn't offer this choice.

That extra step is also why CEW pipe costs more per meter than ERW pipe of the same size — it's paying for a manufacturing stage the ERW pipe never goes through.

Where this plays out in practice: ERW pipe covers general piping — construction, plumbing, structural, and low-pressure fluid transport — where standard commercial tolerances are enough and cost efficiency is the priority. CEW pipe earns its higher price where a surface or dimension actually does mechanical work: hydraulic cylinder barrels (especially multi-stage/telescopic cylinders), pneumatic cylinders, and precision mechanical or automotive components where a part rides or seals against the bore.

Read full guide: ERW Pipe VS. CEW Pipe: Key Differences Explained

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