En 102251 Pdf «2027»

The Ultimate Guide to EN 10225 PDF: Weldable Structural Steels for Offshore Applications

Step 3: Welding Procedure Specification (WPS)

The standard limits heat input (typically ≤ 5.0 kJ/mm for S355G). Your WPS must qualify using CTOD tests per EN 10225 Annex A.

Step 4: Third-Party Verification

Offshore classification societies (DNV, ABS, Lloyd’s Register) will ask for the material certificate (EN 10204 3.2) referencing EN 10225.

2. Chemical Composition (CEV and Pcm)

Weldability is defined via:

• Carbon Equivalent (CEV) – Maximum limits to prevent cold cracking.
• Pcm – A more sensitive cracking parameter for thick plates.

Example for S355G10+N: CEV ≤ 0.42% for thickness < 50mm.

3.4 Camber

• Method: Lay strip on flat table, pull taut, measure max deviation from straight edge
• Length: Typically 2000 mm
• Limit: ≤2 mm per 2 m for most applications

7. Practical Implementation Steps

Step 1 – Preparation
  - Clean sample (no oil, dust)
  - Stabilize at 23±5°C for 2 hours
  - Mark measurement grid on sheet
Step 2 – Thickness & Width

Use calibrated micrometer (0.001 mm)
Measure at 5 points across width, 10 points along length

Step 3 – Burr & Edge Quality

Place sheet on granite plate
Run dial indicator along edge at 45° angle
Record max burr height

Step 4 – Flatness (Wave/Buckle)

Clamp sheet at one end on flat table
Insert feeler gauge under wave peak
Record height & span length

Step 5 – Documentation

Compare to specified tolerances (e.g., IEC 60404-9)
Calculate Cpk if required by customer

5. Inspection and Testing

The PDF will detail frequency of:

• Ultrasonic testing (UT) for laminations.
• Tensile and impact tests per heat treatment lot.
• Hardness tests for HAZ (Heat Affected Zone).