+3 votes
14,776 views

Difference between API 650, 620, 12D, and 12F

asked Aug 15, 2014 in Mechanical by franchaze (1,150 points) | edited Aug 15, 2014 by odadmin
What is the difference between API 650, 620, 12D, and 12F?

2 Answers

+3 votes
answered Aug 15, 2014 by Tadd Pham (5,620 points) | selected Aug 15, 2014 by Normandy
 
Best answer

All four specifications were produced to provide guidelines for design storage tanks; however, each specification was produce to give a specific area of the storage tank.

API 650:

  • API-650 is a general specification for designing welded steel storage tank for oil storage
  • Large size storage tank
  • Temperature: -40F to 500F
  • Pressure: up to 2.5 psig

API 620:

  • Design and Construction of large welded low pressure storage tank
  • Large size storage tank
  • Temperature: -325F to 250F
  • Pressure: up to 15 psig

API 12D:

  • API 12D is field fabricated tank of production liquids
  • Smaller in size compared to API 650/620
  • Temperature: Ambient

API 12F:

  • API 12F is shop fabricated tank of production liquids
  • Smaller in size compared to API 650/620
  • Temperature: Ambient
  • API 12F is intended to use for oilfield service mostly
+2 votes
answered Aug 15, 2014 by Normandy (21,040 points)

For further consideration regarding storage tanks

  • API 12B - Bolted Storage Tanks of Production Liquids
  • API 12P - Fiberglass Reinforced Plastic Tanks
  • UL-142 - aboveground steel storage tanks are designed for storing flammable and combustible liquids
  • API 653, Tank Inspection, Repair, Alteration, and Reconstruction

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