ANSI/ASME STS-1-2006

ASME STS-1-2006 - Steel Stacks
ISBN: 0791830055

October, 2006

American Society of Mechanical Engineers

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The following Standard applies to steel stacks; that is, those stacks where the primary supporting shell is made of steel. It applies to both single- and multiple-walled steel stacks, either of which can be lined or unlined. It also applies to steel stacks that are guyed, or to certain aspects of tower stacks. The stack may be supported on a foundation or from another structure. This Standard covers many facets of the design of steel stacks. It outlines the consideration which must be made for both the mechanical and structural design. It emphasizes what consideration must be taken for wind- and seismic-induced vibrations. It gives guidelines for the selection of material, linings, and coatings. It gives the requirements for lighting and lightning protection based upon existing building and federal codes. It gives the requirements for climbing and access based upon current Occupational Safety and Health Administration (OSHA) standards. It emphasizes the important areas regarding fabrication and construction. It outlines areas requiring maintenance and inspection following initial operation. Although many of the topics within these guidelines may be used for all stacks, this Standard is intended to provide design guidelines for stacks containing non flammable gases such as combustion exhaust gases at low internal pressures. For stacks containing combustible gases under pressure such as flare stacks and flammable vents, additional design considerations must be addressed, including design for internal pressure, design for internal deflagration pressure, and compatibility with adjoining piping design that is in accordance with piping and/or vessel design codes such as ASME B31.3 and Section VIII of the ASME Boiler and Pressure Vessel Code. In addition, the materials of construction referenced in this Standard may not be allowed for use with flammable gases under pressure per ASME B31.3 and Section VIII of the ASME BPVC; materials suitable for pressure containment of flammable gases are listed in these codes. No attempt is made within this Standard to define the need or the methods to be used to consider these additional design considerations.

Keywords :L06906


iii
CONTENTS
Foreword .............................................................................. iv
Committee Roster ..................................................................... v
Correspondence with the Steel Stacks Committee ....................................... vi
Introduction ........................................................................... vii
1 Mechanical Design ........................................................... 1
2 Materials .................................................................... 4
3 Linings and Coatings ........................................................ 7
4 Structural Design ............................................................ 13
5 Dynamic Wind Loads ......................................................... 20
6 Access and Safety ........................................................... 23
7 Electrical .................................................................... 28
8 Fabrication and Erection ...................................................... 29
9 Inspection and Maintenance .................................................. 31
10 References .................................................................. 33
Figures
6.2.6-1 Example of the General Construction of Cages ............................... 24
6.2.6-2 Minimum Ladder Clearances ................................................ 25
6.3.6 Ladder Dimensions, Support Spacing, and Side Clearances ................... 26
6.3.8 Landing Platform Dimensions ............................................... 27
Tables
4.4.6 Factors of Safety ............................................................ 16
4.4.7 Minimum Structural Plate Thickness and Maximum Stiffener Spacing ........ 16
4.10.1.3 Cable Selection Criteria ..................................................... 18
5.2.1 Representative Structural Damping Values (H9252
s
)............................... 21
Mandatory Appendix
I Structural Design ........................................................... 35
Nonmandatory Appendices
A Mechanical Design .......................................................... 46
B Materials for Ambient and Elevated Temperature Service ..................... 59
C Linings and Coatings ....................................................... 75
D Structural Design ........................................................... 79
E Example Calculations ....................................................... 86
F Conversion Factors: U.S. Customary to SI (Metric) ........................... 97

Product Replaces

ASME STS-1-2000 - Steel Stacks
ASME STS-1a-2003 - Addenda to ASME STS-1-2000 Edition, Steel Stacks
ASME STS-1-2000A - Steel Stacks with Addenda 1