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API TR 11L

Design Calculations for Sucker Rod Pumping Systems (Conventional Units), Fifth Edition
standard by American Petroleum Institute, 06/01/2008

API Spec 11E

Specifications for Pumping Units, Nineteenth Edition, Includes Errata 1 (2015) and Addendum 1 (2018)
standard by American Petroleum Institute, 11/01/2013

API Spec 6D Addendum 1

Addenda 1 to Specification for Pipeline Valves, Twenty-third Edition (Identical to ISO 14313:2007)
Amendment by American Petroleum Institute, 10/01/2009

API Std 1104

Welding of Pipelines and Related Facilities, 21st Edition, Includes Errata 1 (2013), Errata 2 (2014), Errata 3 (2014), Errata 4 (2015), Errata 5 (2018) and Addendum 1 (2014), Addendum 2 (2016)
standard by American Petroleum Institute, 09/01/2013