ANSI/API Standard 661 is the national adoption of ISO 13706: 2000-Petroleum and Natural Gas Industries-Air-cooled Heat Exchangers. ANSI/API Standard 661 gives requirements and recommendations for the design, materials, fabrication, inspection, testing and preparation for shipment of air-cooled heat exchangers for use in the petroleum and natural gas industries.This International Standard is applicable to air-cooled heat exchangers with horizontal bundles, but the basic concepts may also be applied to other configurations.
API 661:2002 History
API Std 661 (R2024)
$139.00 $279.00
API Std 661:2006
$70.00 $140.00
API 661:2002
$72.00 $144.00
API 661:1997
$72.00 $144.00
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