EN 10296 vs EN 10297
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The welded-versus-seamless EN families for circular steel tubes used in mechanical and general engineering, and how they differ from pressure and structural tube standards.
EN 10296 and EN 10297 are for circular steel tubes used in mechanical and general engineering purposes. Their top-level manufacturing-route distinction is straightforward:
- EN 10296 — welded circular steel tubes;
- EN 10297 — seamless circular steel tubes.
This makes them easy to confuse with the EN 10216/10217 pressure-tube families. The key difference is application scope.
Practical comparison
| Topic | EN 10296 | EN 10297 |
|---|---|---|
| Application family | Mechanical and general engineering | Mechanical and general engineering |
| Manufacturing route | Welded | Seamless |
| Part 1 | Non-alloy and alloy steel | Non-alloy and alloy steel |
| Part 2 | Stainless steel | Stainless steel |
| Pressure-purpose family? | No — not the EN 10217 pressure-tube family | No — not the EN 10216 pressure-tube family |
| Structural hollow-section family? | No | No |
EN 10296
EN 10296-1 covers welded circular non-alloy and alloy steel tubes for mechanical/general engineering. Its scope includes electric-welded, laser-beam-welded and submerged-arc-welded routes.
EN 10296-2 covers the corresponding welded stainless mechanical/general-engineering tubes.
So “EN 10296” should not be interpreted merely as ERW; the permitted process depends on the applicable part and product.
EN 10297
EN 10297-1 covers seamless circular non-alloy and alloy steel tubes for mechanical and general engineering purposes.
EN 10297-2 covers seamless stainless tubes for the same broad application family.
A seamless tube does not automatically belong to EN 10216. If it is intended for machining, mechanical components or general engineering rather than pressure service, EN 10297 may be the relevant product family.
Why application comes before welded/seamless
Consider two tubes with the same OD and wall thickness:
- a seamless pressure tube;
- a seamless tube for a mechanical component.
Both are seamless, but the first may belong to EN 10216, while the second may belong to EN 10297. Manufacturing route alone cannot select the standard.
The same is true for welded tubes: EN 10217 and EN 10296 are both welded families but serve different purposes.
See EN 10216 vs EN 10217 for the pressure-tube families.
EN 10296/10297 vs EN 10210/10219
Mechanical/general-engineering tube is also different from structural hollow section.
- EN 10210 / EN 10219 are structural hollow-section standards.
- EN 10296 / EN 10297 are circular tube standards for mechanical/general engineering.
The same nominal steel family or dimension does not make the products interchangeable because mechanical properties, tolerances, testing, delivery conditions and conformity requirements can differ.
See EN 10210 vs EN 10219.
Procurement questions to ask
If an MTO merely says “steel tube,” identify:
- What is the tube doing — pressure containment, structural load, mechanical component, conveyance, heat exchanger, etc.?
- Is seamless or welded required?
- Carbon/non-alloy, alloy or stainless?
- Which mechanical properties are needed?
- What dimensional tolerance/finish is required for subsequent machining?
- Is any pressure-design code applicable?
- What inspection document and NDT are required?
Only then should the product standard be chosen.
Current-standard note
NEN lists EN 10296-2:2005, EN 10297-1:2003 and EN 10297-2:2005 as current. Standards catalogue records also list EN 10296-1:2003 as current. Because these are relatively old publication years, do not assume “old date = obsolete”; check status with the applicable national standards body.
MetalMate takeaway
EN 10296 is welded mechanical/general-engineering tube; EN 10297 is seamless mechanical/general-engineering tube. They should not be confused with EN 10217/10216 pressure tubes or EN 10219/10210 structural hollow sections.
Related Knowledge
- EN 10216 vs EN 10217
- EN 10216 series explained
- EN 10217 series explained
- Which EN tube standard applies?
References
- CEN catalogue record, EN 10296-1:2003: https://shop.standards.ie/en-ie/standards/en-10296-1-2003-329642_saig_cen_cen_758596/
- NEN, EN 10296-2:2005: https://www.nen.nl/en/nen-en-10296-2-2005-en-99815
- NEN, EN 10297-1:2003: https://www.nen.nl/en/nen-en-10297-1-2003-en-83443
- NEN, EN 10297-2:2005: https://www.nen.nl/en/nen-en-10297-2-2005-en-99816
Standards referenced
- EN 10296-1:2003
- EN 10296-2:2005
- EN 10297-1:2003
- EN 10297-2:2005