API 650: Welded Tanks for Oil Storage, 13th Edition (2020)
API 650: Welded Tanks for Oil Storage, 13th Edition (2020) sets the standard for the design, construction, and inspection of vertical, cylindrical, aboveground welded storage tanks operating near atmospheric pressure. Intended for non-refrigerated service up to 93°C (200°F), this specification is essential for tanks used in the storage of petroleum, chemicals, and other liquid products.
Highlights:
- Covers open-top and closed-top tank design for a wide range of capacities
- Allows construction using carbon steel, stainless steel, and duplex steel materials
- Specifies requirements for shell, bottom, roof, nozzle components, and structural supports
- Provides detailed material selection guidance and limits for plates, flanges, and welding consumables
- Defines procedures for welding, welder qualification, and weld inspection
- Includes standards for erection, hydrostatic testing, tolerances, and repair methods
- Annexes address specialized applications:
- Seismic design (Annex E)
- Floating roofs (Annexes C and H)
- Aluminum and stainless steel tanks (Annexes AL and S)
- Elevated temperature service (Annex M)
- Leak detection, under-bottom connections (Annexes I and O)
- API Monogram licensing (Annex Y)
Who It’s For:
A critical reference for storage tank engineers, fabricators, inspectors, and facility operators involved in tank design, procurement, fabrication, and field erection in the oil, gas, chemical, and industrial sectors.
API 650-2020
API 650: Welded Tanks for Oil Storage, 13th Edition (2020)
API 650: Welded Tanks for Oil Storage, 13th Edition (2020) sets the standard for the design, construction, and inspection of vertical, cylindrical, aboveground welded storage tanks operating near atmospheric pressure. Intended for non-refrigerated service up to 93°C (200°F), this specification is essential for tanks used in the storage of petroleum, chemicals, and other liquid products.
Highlights:
- Covers open-top and closed-top tank design for a wide range of capacities
- Allows construction using carbon steel, stainless steel, and duplex steel materials
- Specifies requirements for shell, bottom, roof, nozzle components, and structural supports
- Provides detailed material selection guidance and limits for plates, flanges, and welding consumables
- Defines procedures for welding, welder qualification, and weld inspection
- Includes standards for erection, hydrostatic testing, tolerances, and repair methods
- Annexes address specialized applications:
- Seismic design (Annex E)
- Floating roofs (Annexes C and H)
- Aluminum and stainless steel tanks (Annexes AL and S)
- Elevated temperature service (Annex M)
- Leak detection, under-bottom connections (Annexes I and O)
- API Monogram licensing (Annex Y)
Who It’s For:
A critical reference for storage tank engineers, fabricators, inspectors, and facility operators involved in tank design, procurement, fabrication, and field erection in the oil, gas, chemical, and industrial sectors.
API 650-2020
ASCE 24-14: Flood Resistant Design and Construction, 2014
ASCE 24-14: Flood Resistant Design and Construction provides minimum requirements for the planning, design, and construction of buildings in flood-prone areas. Referenced by the International Building Code (IBC) and the National Flood Insurance Program (NFIP), this standard supports floodplain management regulations and promotes resilience through engineering best practices.
Highlights:
- Defines Flood Design Class (1–4) to guide risk-based design criteria
- Specifies elevation requirements based on flood hazard zones, building type, and occupancy
- Includes wet and dry floodproofing methods for commercial and residential applications
- Updates flood opening requirements including engineered vent systems and louvers
- Provides structural design standards for Coastal A Zones and coastal high hazard areas
- Identifies acceptable flood damage-resistant materials and construction techniques
- Covers tanks, utilities, egress, garages, and parking structures in flood-prone zones
- Offers guidance for substantial improvements and retrofitting of existing buildings
- Coordinates with ASCE 7 and NFIP regulations to ensure code consistency and compliance
Who It’s For:
Essential for civil engineers, architects, code officials, and builders involved in flood zone development, permitting, and compliance with FEMA, IBC, and local floodplain standards.
ASCE 24-2014
ASCE 24-14: Flood Resistant Design and Construction, 2014
ASCE 24-14: Flood Resistant Design and Construction provides minimum requirements for the planning, design, and construction of buildings in flood-prone areas. Referenced by the International Building Code (IBC) and the National Flood Insurance Program (NFIP), this standard supports floodplain management regulations and promotes resilience through engineering best practices.
Highlights:
- Defines Flood Design Class (1–4) to guide risk-based design criteria
- Specifies elevation requirements based on flood hazard zones, building type, and occupancy
- Includes wet and dry floodproofing methods for commercial and residential applications
- Updates flood opening requirements including engineered vent systems and louvers
- Provides structural design standards for Coastal A Zones and coastal high hazard areas
- Identifies acceptable flood damage-resistant materials and construction techniques
- Covers tanks, utilities, egress, garages, and parking structures in flood-prone zones
- Offers guidance for substantial improvements and retrofitting of existing buildings
- Coordinates with ASCE 7 and NFIP regulations to ensure code consistency and compliance
Who It’s For:
Essential for civil engineers, architects, code officials, and builders involved in flood zone development, permitting, and compliance with FEMA, IBC, and local floodplain standards.
ASCE 24-2014

