TDS PDF

Seat Tightness of Pressure Relief Valves. Original standard API St 527-2020 in PDF full version. Additional info + preview on request

Document status: Replaced by St API St 527-2020 (2025)

Calculation of Heater-tube Thickness in Petroleum Refineries. Original standard API St 530-2015 in PDF full version. Additional info + preview on request

Document status: Replaced by

Burners for Fired Heaters in General Refinery Services. Original standard API St 535-2024 in PDF full version. Additional info + preview on request

Document status: Replaced by

Form-Wound Squirrel-Cage Induction Motors 500 Horsepower and Larger. Original standard API St 541-2014 in PDF full version. Additional info + preview on request

Document status: Replaced by St API STD 541-2026

Form-Wound Squirrel-Cage Induction Motors 500 Horsepower and Larger. Original standard API St 541-2014 (2021) in PDF full version. Additional info + preview on request

Document status: Replaced by St API STD 541-2026

Brushless Synchronous Machines—500 kVA and Larger. Original standard API St 546-2008 in PDF full version. Additional info + preview on request

Document status: Replaced by St API St 546-2022