EN 10216-5 VS EN 10204 The Difference Between EN 10216-5 and EN 10204?

In simple terms, EN 10216-5 specifies the technical standard for “what to make,” while EN 10204 specifies the inspection document standard for “how to prove it.”

The first tells you what properties the steel tube itself must have, and the second tells you what kind of certificate the manufacturer must provide to prove the product is conforming/qualified.

Below is a detailed explanation of each standard’s core positioning, specific content, and their relationship.

📜 EN 10216-5: Technical Standard for Seamless Steel Tubes for Pressure Purposes

This is a product specification standard. It is specifically for stainless steel seamless tubes used in pressure equipment (like boilers and pipelines). It details all technical requirements and details for this type of product.

• Core Content: The standard covers all technical requirements from material production to delivery, including:
  • Steel Grades and Chemical Composition: Specifies the allowed steel types (e.g., austenitic stainless steel) and their element content.
  • Manufacturing Process: Requires tubes to be made using specific processes (e.g., hot-finished, cold-drawn).
  • Mechanical Properties: Specifies mandatory mechanical indicators, such as tensile strength, yield strength, and hardness.
  • Delivery Condition and Dimensions: Defines the delivery condition (e.g., solution annealed), surface quality, and dimensional tolerances.
  • Test Methods: Details how to perform tensile tests, impact tests, non-destructive testing (e.g., ultrasonic testing), etc.
  • Inspection Categories: The standard mentions two test categories which define the scope and strictness of inspection.

In short, EN 10216-5 is like a “product datasheet.” It tells the manufacturer what mandatory indicators the “seamless stainless steel tube for pressure purposes” must meet in terms of material, properties, dimensions, etc.

📄 EN 10204: Types of Inspection Documents for Metallic Products

This is a document requirement standard. It does not concern itself with the product’s technical parameters. Instead, it specifies what type of inspection document the manufacturer of a metallic product (plate, tube, forging, etc.) must provide to the buyer to prove that the product conforms to the order requirements.

• Core Content: Based on the strictness of inspection and who signs the document, the standard defines four types of inspection documents:
  • Type 2.1: Declaration of Compliance. The manufacturer declares the product meets order requirements but provides no specific test results.
  • Type 2.2: Test Report based on non-specific inspection. The manufacturer provides test results based on sampling from their quality system; the report is not for the specific delivered product.
  • Type 3.1: Certificate based on specific inspection. The manufacturer provides a certificate declaring that the product underwent specific tests performed by an inspection department independent of the manufacturing department, along with the specific test results. Requires manufacturer certification like ISO 9001.
  • Type 3.2: Certificate inspected by a third-party witness. This is the highest level certificate. In addition to meeting 3.1 requirements, the document must be countersigned by both the manufacturer and an EU-recognized third-party body (e.g., a Notified Body).

In short, EN 10204 is like a “product qualification file.” It specifies what level of “evidence” (from a simple self-declaration to strict third-party certification) the manufacturer must provide to prove their product meets the requirements of a product standard like EN 10216-5.

🔗 What is the Relationship Between Them?

These two standards are inseparable in practice, forming a complete quality assurance system. The diagram below clearly shows their different roles:

• Complementary: When purchasing steel tubes under EN 10216-5, the purchase contract will typically also reference EN 10204 and specify the required certificate type (e.g., “EN 10204 – 3.1 certificate required”).
• Clear Relationship:
  • EN 10216-5 defines the technical entity of the product.
  • EN 10204 defines the evidentiary document for the product.
• Application Example: A factory buys EN 10216-5 stainless steel tubes to manufacture pressure vessels. For final acceptance, the tube supplier must also provide an EN 10204 Type 3.1 certificate. This certificate will state the tube’s heat number, chemical composition, and mechanical test results, proving that this batch of tubes fully meets all requirements of EN 10216-5.

💎 Summary

I hope this explanation is helpful. If convenient, could you tell me your specific current need? For example, are you sourcing stainless steel tubes for pressure equipment or preparing documents for export certification? This would allow me to provide you with more specific information.

EN 10216-5 1.4301 1.4307 1.4948 1.4401 1.4404 1.4541 1.4571 1.4438 1.4841 1.4845 1.4539 Stainless Steel Tube Tubing
ASTM A213 ASME SA213 304H 321H 347H 309S 310S 316H S31035 800HT N08811 N08825 Reheater Tubes and Superheater Tubes for Boiler
ASTM A789 ASME SA 789 S31803 S32205 S32101 S32750 S32760 S32304 S31500 S31260 Seamless Tubes
ASTM A790 ASME SA790 S31803 S32205 S32101 S32750 S32760 S32304 S31500 S31260 Seamless Pipe
EN 10216-5 1.4462 1.4362 1.4162 1.4410 1.4501 Seamless Tubes