This article provides you the definition and boundaries of pressure vessel as per ASME Code Section VIII and API Standard 510. Defin...
This article provides you the definition and boundaries of pressure vessel as per ASME Code Section VIII and API Standard 510.
Definition of Pressure Vessel
As per ASME Code Section VIII, pressure vessels are containers for the containment of pressure, either internal or external. This pressure may be obtained from an external source or by the application of heat from a direct or indirect source, or any combination thereof.
The ASME Code Section VIII is a construction code for pressure vessels and contains mandatory requirements, specific prohibitions and non-mandatory guidance for pressure vessel materials, design, fabrication, examination, inspection, testing, and certification.
Scope
These scopes are based ASME Code Sec VIII Div. 1
The vessel with maximum allowable working pressure (MAWP) higher than 15 psi
Inside diameter to be higher than 152 mm
No piping or piping component
No rotating or reciprocating Equipment
Not Water Vessel up to 300psi or 210°F
Not within the scope of other Sections
Also Gas fired jacketed steam kettles with jacket operating pressures not exceeding 50 psi (345 kPa)
Not Steam Boilers with direct firing
Not for Human Occupancy (PVHO)
Boundaries
The welding end of the first circumferential joint for welded connections
The first threaded joint for screwed connections
The face of the first flange for bolted, flanged connections
The first sealing surface for proprietary connections or fittings
Nonpressure parts welded directly to a pressure-retaining surface
Pressure retaining covers
Pressure relief devices
What is API Code Definition from Pressure Vessel?
Contrary to ASME Code Sec VIII, which was developed for construction, the API STD 510 covers the in-service inspection, repair, alteration, and rerating activities for pressure vessels.
This inspection code applies to all refining and chemical process vessels that have been placed in service.
What is the API STD 510 coverage?
Vessels constructed in accordance with an applicable construction code
Vessels constructed without a construction code (non-code) - A vessel not fabricated to a recognized construction code and meeting no known recognized standard
Vessels constructed and approved as jurisdictionally special based upon jurisdiction acceptance of particular design, fabrication, inspection, testing, and installation
Non-standard vessels - A vessel fabricated to a recognized construction code but has lost its nameplate or stamping.
Great detail information regarding the Pressure Vessel easy to understand for the readers. Dhaval Engineers is a leading Pressure Vessel Manufacturer. located in Ahmedabad, Gujarat, India.
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