API SPEC 12K : 2008

1 Scope
2 References
3 Definitions
4 Materials
  4.1 General
  4.2 Coils
  4.3 Flanges
  4.4 Fittings
  4.5 Proprietary Fittings
  4.6 Bolting
  4.7 Shells, Firetubes and Stacks
5 Design
  5.1 Coil Design
  5.2 Shell Design
  5.3 Standard Firebox Rating
  5.4 Firetube Heat Flux
  5.5 Firetube Heat Density
  5.6 Stack Height
6 Fabrication, Testing and Painting
  6.1 General
  6.2 Coil Fabrication
  6.3 Shell, Firetube, Stack and Accessories
  6.4 Painting
7 Marking
  7.1 Nameplate
  7.2 Shell Nameplate
  7.3 Coil Nameplate
  7.4 Coil Connection
8 Inspection and Rejection
  8.1 Inspection Notice
  8.2 Inspection by Purchaser
  8.3 Rejection
  8.4 Compliance
Annex A (informative) - Indirect Heater Design Information
Annex B (informative) - Gas Flow Rate
Annex C (informative) - Combustion Efficiency
Annex D (informative) - Heat Transfer
Annex E (informative) - Structural Design Guidelines
Annex F (informative) - Corrosion Guidelines
Annex G (informative) - Use of the API Monogram by Licensees

Describes minimum requirements for the design, fabrication, and shop testing of oilfield indirect type fired heaters used in the production of oil, gas, and their associated fluids. They are usually located at some point on the producing flow-line between the wellhead and pipeline.