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Accepted Industry Practice for Industrial Duct Construction, 2nd Edition, 2008

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FOREWORD
INDUSTRIAL DUCT CONSTRUCTION STANDARDS COMMITTEE
NOTICE TO USERS OF THIS PUBLICATION
TABLE OF CONTENTS
CHAPTER 1 INTRODUCTION [Go to Page]
1.1 INTRODUCTION
1.2 MANUAL CONTENTS
CHAPTER 2 INDUSTRIAL DUCT APPLICATIONS [Go to Page]
2.1 INTRODUCTION
2.2 DEFINITION OF INDUSTRIAL DUCT
2.3 DUCT SYSTEM CLASSIFICATION
2.4 MATERIAL (PARTICULATE) CHARACTERISTICS AND CLASSES
Table 2-1 Duct Classes and Minimum Conveying Velocities
Table 2-2 Material Class Descriptions
Table 2-3 Specific Materials Classes
Table 2-3 Specific Materials Classes (continued)
Table 2-3 Specific Materials Classes (continued)
Table 2-3 Specific Materials Classes (continued)
Table 2-3 Specific Materials Classes (continued)
CHAPTER 3 DUCT MATERIALS [Go to Page]
3.1 INTRODUCTION
3.2 MATERIAL TYPES
3.3 CARBON AND COATED STEEL DATA
3.4 STAINLESS STEEL DATA
3.5 ALUMINUM DATA
3.6 MATERIAL PROPERTIES SUMMARY
3.7 CORROSION
Table 3-1 Hot"rolled Steel Gages
Table 3-2 Cold"rolled Steel Gages
Table 3-3 Galvanized and Aluminized Steel Gages
Table 3-4 Stainless Steel Gages
Table 3-5 Aluminum Sheet Gages
Table 3-6 Material Properties and Temperature Limits
Table 3-7 Corrosion Chart
Table 3-7 Corrosion Chart (continued)
CHAPTER 4 DUCT CONSTRUCTION [Go to Page]
4.1 DUCT CONSTRUCTION
4.2 ROUND DUCT COMMON SEAMS AND JOINTS
4.3 RECTANGULAR DUCT COMMON SEAMS AND JOINTS
4.4 FABRICATION TOLERANCES
4.5 WELDING
4.6 SELECTION OF REINFORCEMENTS
4.7 CONNECTING INDUSTRIAL DUCT
4.8 THERMAL EXPANSION
4.9 FLEXIBLE DUCT
Table 4-1S Recommended Sheet Steel Gages for Round Duct, Up to 650 F
Table 4-1S Recommended Sheet Steel Gages for Round Duct, Up to 650 F (continued)
Table 4-1S Recommended Sheet Steel Gages for Round Duct, Up to 650 F (continued)
Table 4-1S Recommended Sheet Steel Gages for Round Duct, Up to 650 F Table 4-1S Recommended Sheet Steel Gages for Round Duct, Up to 650 F Table 4-1S Recommended Sheet Steel Gages for Round Duct, Up to 650 F (continued)
Table 4-1A Recommended Aluminum Gages for Round Duct, Up to 120 F
Table 4-1A Recommended Aluminum Gages for Round Duct, Up to 120 F (continued)
Table 4-1Spiral Recommended Sheet Steel Gages for Round Spiral Duct, Up to 250 F
Table 4-1Spiral Recommended Sheet Steel Gages for Round Spiral Duct, Up to 250 F (continued)
Table 4-2S Recommended Sheet Steel Gages for Rectangular Duct, Up to 650 F
Table 4-2S Recommended Sheet Steel Gages for Rectangular Duct, Up to 650 F (continued)
Table 4-2S Recommended Sheet Steel Gages for Rectangular Duct, Up to 650 F (continued)
Table 4-2S Recommended Sheet Steel Gages for Rectangular Duct, Up to 650 F (continued)
Table 4-2A Recommended Aluminum Gages for Rectangular Duct, to 120 F
Table 4-2A Recommended Aluminum Gages for Rectangular Duct, Up to 120 f (continued)
Table 4-3 Thermal Expansion Chart
FIGURE 4-1 LONGITUDINAL SEAMS - ROUND
FIGURE 4-2 LONGITUDINAL SEAMS - RECTANGULAR
FIGURE 4-3 LONGITUDINAL SEAMS - RECTANGULAR (CONTINUED)
FIGURE 4-4 TRANSVERSE SEAMS OR JOINTS - ROUND
FIGURE 4-5 TRANSVERSE SEAMS OR JOINTS - ROUND (CONTINUED)
FIGURE 4-6 TYPICAL FLANGED CONNECTIONS - ROUND
FIGURE 4-7 TYPICAL DUCT CONNECTIONS - VAN STONE ROUND
FIGURE 4-8 TYPICAL APPLICATION OF ANGLE RING TO SPIRAL PIPE
FIGURE 4-9 TYPICAL JOINTS FOR SPIRAL PIPE
FIGURE 4-10 TYPICAL SPIRAL PIPE DUCT CONNECTIONS " VAN STONE
FIGURE 4-11 TRANSVERSE SEAMS OR JOINTS - RECTANGULAR
FIGURE 4-12 FABRICATION TOLERANCES
FIGURE 4-13 TYPES OF STIFFENERS - RECTANGULAR DUCT
FIGURE 4-14 TYPES OF STIFFENERS - RECTANGULAR DUCT (CONTINUED)
FIGURE 4-15 TYPICAL EXPANSION JOINTS
FIGURE 4-16 TYPICAL EXPANSION JOINTS (CONTINUED)
FIGURE 4-17 FLEXIBLE CONNECTIONS
FIGURE 4-18 FLEXIBLE DUCT
FIGURE 4-19 FLEXIBLE CONNECTION APPLICATIONS
CHAPTER 5 HANGERS AND SUPPORTS [Go to Page]
5.1 INTRODUCTION AND SCOPE
5.2 HANGERS AND SUPPORTS COMMENTARY
5.3 DUCT LOADS COMMENTARY
5.4 GENERAL GUIDELINES
5.5 METHODS FOR HANGING AND SUPPORTING DUCT
5.6 DUCT HANGERS AND SUPPORTS
5.7 GASKETS, CAULKING, AND JOINT SEALANTS
Table 5-1 Maximum Allowable Load at Points of Support - Carbon and Galvanized Steel Ducts
Table 5-2 Maximum Allowable Load at Points of Support - Aluminum Ducts
Table 5-3 Support Capacity of Horizontal Channel
Table 5-4 Support Capacity of Horizontal Angle
Table 5-5 Standard Steel Pipe Column - Load Tables
Table 5-6 Hanger Rod Capacity
Table 5-7 Hanger Bar Capacity
Table 5-8 Hanger Angle Capacity
Table 5-9 Knee Brace Hanger Capacity
Table 5-10 Knee Brace Support Capacity
Table 5-11 Bolt Stress Area
Table 5-12 Grade Markings for Steel Bolts
Table 5-13 Gaskets, Caulking, and Joint Sealants
Table 5-13 Gaskets, Caulking, and Joint Sealants (continued)
FIGURE 5-1 DEFINITION OF RISER SUPPORT LOADS
FIGURE 5-2 HANGER ATTACHMENTS TO STRUCTURES
FIGURE 5-3 UPPER ATTACHMENT DEVICES - TYPICAL
FIGURE 5-4 RECOMMENDED HANGER SPACING IN REFERENCE TO UNREINFORCED JOINT
FIGURE 5-5 METHODS FOR HANGING ROUND INDUSTRIAL DUCT
FIGURE 5-6 SUPPORT SCHEMES WITH EXTENDED RATINGS
FIGURE 5-7 DUCT SADDLES
FIGURE 5-8 EXPANSION HANGER AND SUPPORTS
FIGURE 5-9 RISER SUPPORT - FROM FLOOR/BUILDING STRUCTURE
FIGURE 5-10 ROUND INDUSTRIAL DUCT SUPPORT METHODS
FIGURE 5-11 ROUND INDUSTRIAL DUCT SUPPORT METHODS (CONTINUED)
FIGURE 5-12 RISER SUPPORTS - FROM FLOOR
FIGURE 5-13 ROUND INDUSTRIAL DUCT SUPPORT METHODS
FIGURE 5-14 HANGER FOR DUCT
FIGURE 5-15 DUCT HANGER DETAIL
FIGURE 5-16 TRAPEZE TYPE SUPPORTS
FIGURE 5-17 TRAPEZE TYPE SUPPORTS (CONTINUED)
FIGURE 5-18 SUPPORTS FROM WALL
CHAPTER 6 FITTINGS, VENTS, DOORS & OTHER APPURTENANCES [Go to Page]
6.1 DUCT AND FITTING DESIGN
6.2 RELIEF VENTS
6.3 CLEANOUTS
6.4 TEST AND SAMPLING OPENINGS
6.5 USE OF DAMPERS AND VALVES
FIGURE 6-1 DUCT BRANCH PIPE ENTRIES
FIGURE 6-2 PANT FITTINGS OR WYE BRANCH
FIGURE 6-3 REDUCERS AND SQUARE TO ROUNDS
FIGURE 6-4 VARIOUS RECTANGULAR FITTINGS
FIGURE 6-5 SEGMENTED ELBOWS
FIGURE 6-6 FLATBACK ELBOWS
FIGURE 6-7 PRESSURE RELIEF AND EXPLOSION DOORS
FIGURE 6-8 EXPLOSION DOOR
FIGURE 6-9 CLEANOUT / ACCESS DOORS
FIGURE 6-10 CLEANOUT / ACCESS DOORS
FIGURE 6-11 CLEANOUT / ACCESS DOORS
FIGURE 6-12 ACCESS DOORS
FIGURE 6-13 BLAST GATE AND CUTOFFS
FIGURE 6-14 SHOP FABRICATED GATES
FIGURE 6-15 SHOP FABRICATED BUTTERFLY DAMPERS
FIGURE 6-16 COMMERCIAL BUTTERFLY DAMPERS
CHAPTER 7 STACKS AND DISCHARGE DUCTS [Go to Page]
7.1 STACKS AND DISCHARGE DUCTS
7.2 STACK SAMPLING FACILITIES
FIGURE 7-1 VERTICAL DISCHARGE STACK
FIGURE 7-2 TYPICAL STACK THRU ROOF
FIGURE 7-3 AUTOMATIC STACK CAP
FIGURE 7-4 TYPICAL (GOOSENECK) AIR OUTLET
FIGURE 7-5 TYPICAL STACK SAMPLING FACILITIES (PLAN VIEW)
FIGURE 7-6 TYPICAL STACK SAMPLING FACILITIES (ELEVATION VIEW)
CHAPTER 8 [Go to Page]
1. Introduction
2. Contents
3. Importance of Surface Preparation
4. Surface Conditions
5. Summary of SSPC Surface Preparation Standards
6. Selection of Abrasives, Blast Cleaning Parameters, and Equipment
7. Summary of SSPC Abrasive Standards
8. Wet Abrasive Blast and Waterjetting Methods
9. Other Cleaning Methods
10. Film Thickness
11. Consensus Reference Photographs
12. Other SSPC Surface Preparation Documents in This Volume
13. Non-SSPC Cleaning Standards
14. Surface Preparation of Concrete for Coating
15. Surface Preparation of Other Metallic Surfaces
TABLE 8-1 SUMMARY OF CURRENT SSPC ABRASIVE AND SURFACE PREPARATION STANDARDS AND SPECIFICATIONS
TABLE 8-2 RELATIVE RANKING OF SSPC SURFACE PREPARATION STANDARDS FOR STEEL BASED ON THOROUGHNESS OF CLEANING
TABLE 8-3 THRESHOLD LIMIT VALUES (TLV) FOR SOLVENTS4
TABLE 8-4A COMPARISON OF SSPC AND ISO SURFACE PREPARATION STANDARDS FOR POWER-AND HAND-TOOL CLEANED STEEL
TABLE 8-4B COMPARISON OF SSPC AND ISO SURFACE PREPARATION STANDARDS FOR BLAST CLEANED STEEL
TABLE 8-5 PHYSICAL DATA ON NON-METALLIC ABRASIVES
TABLE 8-6 APPROXIMATE PROFILE HEIGHT OF BLASTED STEEL USING DIFFERENT SIZE ABRASIVES*
TABLE 8-7 SSPC DEFINITIONS OF WATER CLEANING AND WATERJETTING
APPENDIX A REFERENCED DOCUMENTS [Go to Page]
A.1 REFERENCED DOCUMENTS
APPENDIX B WELDING SYMBOLS [Go to Page]
B.1 WELDING SYMBOLS
FIGURE B-1 STANDARD LOCATION OF ELEMENTS OF A WELDING SYMBOL
FIGURE B-2 SUPPLEMENTARY SYMBOLS
FIGURE B-3 TYPICAL WELD SYMBOLS USED FOR SHEET METAL AND LIGHT PLATE [Go to Page]

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Accepted Industry Practice for Industrial Duct Construction, 2nd Edition, 2008