ASME Section VIII, ASME SA516 GR.70 Pressure Vessel for Power Plant Application

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Key Pressure Vessels in Power Plants

1. ASME (American Society of Mechanical Engineers) Boiler and Pressure Vessel Code (BPVC)

• ASME Section VIII (Most widely used for pressure vessels):

  • Div. 1 – Standard design rules for common applications (lower pressure, less stringent analysis).

  • Div. 2 – Alternative rules for higher pressures, requiring detailed stress analysis.

  • Div. 3 – For ultra-high-pressure vessels (above 10,000 psi).

• ASME Section I – Power boilers.

• ASME Section II – Material specifications.

• ASME Section V – Nondestructive testing (NDT).

• ASME B31.3 – Process piping (often used alongside Section VIII).

2. European Pressure Equipment Directive (PED) – EN 13445

• EN 13445 – European standard for unfired pressure vessels.

• PED 2014/68/EU – Legal framework for pressure equipment in the EU.

• Other related EN standards:

  • EN 286 – Simple pressure vessels (air tanks).

  • EN 12952/EN 12953 – Water-tube and shell boilers.

3. API (American Petroleum Institute) Standards

• API 510 – Pressure vessel inspection code.

• API 620 – Large, low-pressure storage tanks.

• API 650 – Welded steel tanks for oil storage.

• API 653 – Tank inspection, repair, and alteration.

4. ISO Standards

• ISO 16528 – Global standardization for boilers and pressure vessels.

• ISO 9001 – Quality management for manufacturing.

• ISO 3834 – Quality requirements for welding.

5. Other Regional Standards

• PD 5500 (UK) – Former BS 5500, now replaced by EN 13445 but still used.

• AD 2000 (Germany) – Pressure vessel design rules.

• CODAP (France) – Design and construction of pressure vessels.

• JIS B 8265 (Japan) – Pressure vessel construction standard.

• GB 150 (China) – Chinese pressure vessel standard.

6. Key Design Considerations & Specifications

• Design Pressure & Temperature – Must account for maximum operating conditions.

• Material Selection – Must comply with ASME Section II or equivalent.

• Welding Standards – ASME Section IX, ISO 9606, or EN 1090.

• NDT Requirements – RT (Radiography), UT (Ultrasonic Testing), PT (Dye Penetrant), MT (Magnetic Particle).

• Safety Factors – ASME Div. 1 typically uses 3.5:1, while Div. 2 uses 2.4:1.

• Corrosion Allowance – Extra thickness added based on service life and environment.

7. Certification & Marking

• ASME U Stamp – Certification for pressure vessels (Div. 1 & 2).

• ASME S Stamp – For power boilers.

• CE Marking (PED Compliance) – Required for EU market.

• NBIC (National Board Inspection Code) – For repairs and alterations.