Lightning Protection of Aboveground Storage Tanks for Flammable or Combustible Liquids (API RP 545) and Verification of Lightning Protection Requirements for Aboveground Hydrocarbon Storage Tanks (API/EI 545-A), First Edition
standard by American Petroleum Institute, 10/01/2009

Investigation and Prediction of Cooling Rates During Pipeline Maintenance Welding.
standard by American Petroleum Institute, 12/01/1991

Specification for Line Pipe, Fifteenth Edition
standard by American Petroleum Institute, 03/01/1956

Guidelines for Voyage Analysis and Reconciliation of Cargo Quantities, Fourth Edition, Includes Datasheets
Handbook / Manual / Guide by American Petroleum Institute, 07/01/2019

Machinery Protection Systems, Fifth Edition
standard by American Petroleum Institute, 11/01/2014

Side-pocket mandrels, First Edition, Includes Errata (2014)
standard by American Petroleum Institute, 05/01/2010

API Manual of Petroleum Measurement Standards, Chapter 5 , Metering -Section 7, Testing Protocol for Differential Pressure Flow Measurement Devices, First Edition
Handbook / Manual / Guide by American Petroleum Institute, 02/01/2003

Volume Correction Factors – Volume II – Table 5B: Generalized Products, Correction of Observed API Gravity to API Gravity at 60 degF. Table 6B: Generalized Products, Correction of Volume to 60 degF Against API Gravity at 60 deg F
Handbook / Manual / Guide by American Petroleum Institute, 08/01/1980

Evaluation of Ammonia "Fixation" Components in Actual Refinery Sour Waters
standard by American Petroleum Institute, 01/01/1978

Specification for Line Pipe, Eighteenth Edition
standard by American Petroleum Institute, 02/01/1960