Stacks must handle dead loads, thermal expansion stresses, and live wind or earthquake loads simultaneously. The document lists strict guidelines for computing:
Moreover, for specialized applications such as stacks containing (e.g., flare stacks), ASME STS-1-2021 explicitly states that additional design considerations are necessary. These include design for internal pressure, internal deflagration, and compatibility with other ASME codes like B31.3 (Process Piping) and Section VIII of the Boiler and Pressure Vessel Code (BPVC) . The standard clarifies that its referenced materials may not be suitable for such applications, guiding engineers to consult other industry codes.
: Heights are determined by balancing natural draft requirements against local Environmental Protection Agency (EPA) air dispersion and downwash regulations. 2. Structural Design and Load Analysis
: Formulas to calculate heat loss and temperature drop across the stack wall, which directly prevents process gas from dropping below its acid dew point. 2. Materials, Linings, and Coatings Asme Sts-1 2021 Pdf
Single/multi-walled, lined/unlined, guyed, and tower-supported steel stacks
: Covers refractory brick, gunite, and organic coatings designed to isolate the raw steel shell from acidic flue gas condensates. 4. Safety, Access, and Electrical
The standard is the definitive and most current guideline for the safe, reliable, and code-compliant design of steel stacks. With its updated wind load provisions aligned with modern ASCE 7 standards and its comprehensive coverage from material selection to in-service maintenance, it is an essential document for any engineer or firm involved in industrial stack projects. Stacks must handle dead loads, thermal expansion stresses,
The Steel Stacks Standard , first published by ASME in 2006 and revised in 2015 and 2021, is the bible for designing, fabricating, erecting, and maintaining industrial steel chimneys. The ‘21 update had tightened fatigue-life calculations, added new vortex-shedding damping requirements, and—most critically—mandated ultrasonic thickness testing for any stack older than 15 years that had seen flue gas temperatures above 800°F.
: Includes single-walled and multiple-walled stacks, which can be either lined or unlined. Support Structures
Covers self-supporting steel stacks and provides guidelines for guyed towers. The standard clarifies that its referenced materials may
ASME STS-1-2021 is an essential reference for structural engineers designing industrial exhaust systems. The 2021 update ensures that designs are compatible with the latest wind and seismic risk models, improving the safety and reliability of these tall, slender structures against environmental hazards. Organizations utilizing the 2011 edition should transition to the 2021 edition to ensure compliance with current building code references.
: Intended primarily for nonflammable gases at low internal pressure, such as combustion exhaust.