ASME BPVC 2025 Section III, Appendices: Division 1 Mandatory and Nonmandatory Appendices
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ASME BPVC 2025 Section III, Appendices contains both mandatory and non-mandatory appendices that supplement the main rules of Section III. These appendices include guidance, clarifications, and alternative calculation methods to support compliance with nuclear construction standards.
ASME BPVC 2025 Section III, Appendices contains both mandatory and non-mandatory appendices that supplement the main rules of Section III. These appendices include guidance, clarifications, and alternative calculation methods to support compliance with nuclear construction standards.
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2021 International Plumbing Code – IPC-2021
The 2021 International Plumbing Code® (IPC) establishes minimum standards for the design, installation, and inspection of plumbing systems in all building types—except one- and two-family dwellings and townhouses up to three stories, which are covered under the IRC. This code supports both prescriptive and performance-based approaches and promotes innovation in materials and design.
Highlights:
- Permits multiple-user all-gender toilet facilities
- Adds two approved methods for sewer relining and rehabilitation
- Allows rooftop solar panels to be installed over vent terminals
- Recognizes CSA B805/ICC 805 for rainwater harvesting system design
- Integrates accessibility provisions from ICC A117.1-2017
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- Structured into prescriptive chapters with appendices and accessibility references
- Fully aligned with the 2021 I-Codes for unified plumbing regulation and enforcement
Who It’s For:
Plumbing engineers, contractors, inspectors, and code officials working on compliant, modern plumbing systems in commercial and multifamily buildings.
IPC-2021
2021 International Plumbing Code – IPC-2021
The 2021 International Plumbing Code® (IPC) establishes minimum standards for the design, installation, and inspection of plumbing systems in all building types—except one- and two-family dwellings and townhouses up to three stories, which are covered under the IRC. This code supports both prescriptive and performance-based approaches and promotes innovation in materials and design.
Highlights:
- Permits multiple-user all-gender toilet facilities
- Adds two approved methods for sewer relining and rehabilitation
- Allows rooftop solar panels to be installed over vent terminals
- Recognizes CSA B805/ICC 805 for rainwater harvesting system design
- Integrates accessibility provisions from ICC A117.1-2017
- Covers potable and nonpotable water, sanitary and storm drainage, venting, water heaters, and graywater systems
- Structured into prescriptive chapters with appendices and accessibility references
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ASME B16.5-2020: Pipe Flanges and Flanged Fittings
Product Summary:
ASME B16.5-2020 defines the requirements for pipe flanges and flanged fittings in sizes NPS ½ through NPS 24, covering pressure–temperature ratings, dimensions, tolerances, materials, and testing. It applies to components used in bolted flange joints made from cast, forged, or plate materials in industrial piping systems.
Key Features:
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- Specifications for bolting materials, gaskets, and flange assembly practices
- Manufacturing tolerances and permanent marking requirements
- Material listings with corresponding ASTM designations for forgings, castings, and plates
- Guidance on gasket selection, bolted joint design, and system hydrotesting
- Appendices covering bolt length calculations, pressure rating derivation, and quality system standards
- Metric and U.S. Customary units presented side-by-side for reference
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Essential for piping designers, mechanical engineers, fabricators, and QA/QC personnel involved in pressure piping systems across oil, gas, chemical, and industrial sectors.
ASME B16.5-2020
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Product Summary:
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Key Features:
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- Dimensional standards for weld neck, blind, reducing, and other flange types
- Specifications for bolting materials, gaskets, and flange assembly practices
- Manufacturing tolerances and permanent marking requirements
- Material listings with corresponding ASTM designations for forgings, castings, and plates
- Guidance on gasket selection, bolted joint design, and system hydrotesting
- Appendices covering bolt length calculations, pressure rating derivation, and quality system standards
- Metric and U.S. Customary units presented side-by-side for reference
Who It’s For:
Essential for piping designers, mechanical engineers, fabricators, and QA/QC personnel involved in pressure piping systems across oil, gas, chemical, and industrial sectors.
ASME B16.5-2020
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Highlights:
- Defines procedures for assessing outdoor air quality and ventilation by occupancy type
- Revised Section 5 reorganizes systems/equipment content by airflow path
- Updates IAQ Procedure with design compound guidance and mass-balance modeling
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- Covers design, installation, commissioning, and maintenance of ventilation systems
- Includes appendices for healthcare settings, air quality evaluation, compliance paths, and simplified rate calculations
- Incorporates addenda through Appendix Q as part of its continuous maintenance model
Who It’s For:
Designed for mechanical engineers, HVAC professionals, code officials, and facility managers responsible for designing and maintaining compliant ventilation systems that promote occupant health and comfort.
ASHRAE 62.1-2022
ANSI/ASHRAE 62.1-2022: Ventilation for Acceptable Indoor Air Quality
ANSI/ASHRAE Standard 62.1-2022: Ventilation for Acceptable Indoor Air Quality defines minimum requirements for mechanical and natural ventilation systems in commercial, institutional, and industrial buildings. Widely referenced by model codes such as the International Building Code, this standard is critical for achieving acceptable indoor air quality (IAQ) in non-residential environments.
Highlights:
- Defines procedures for assessing outdoor air quality and ventilation by occupancy type
- Revised Section 5 reorganizes systems/equipment content by airflow path
- Updates IAQ Procedure with design compound guidance and mass-balance modeling
- Establishes separation distances for exhaust air and dew point limits for cooled spaces
- Classifies ventilation zones and defines airflow effectiveness and breathing zone metrics
- Covers design, installation, commissioning, and maintenance of ventilation systems
- Includes appendices for healthcare settings, air quality evaluation, compliance paths, and simplified rate calculations
- Incorporates addenda through Appendix Q as part of its continuous maintenance model
Who It’s For:
Designed for mechanical engineers, HVAC professionals, code officials, and facility managers responsible for designing and maintaining compliant ventilation systems that promote occupant health and comfort.
ASHRAE 62.1-2022
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The 2021 International Existing Building Code® (IEBC) offers a consistent, performance-based framework for repairing, altering, adding to, or changing the occupancy of existing buildings. It facilitates the reuse of older and historic structures while maintaining safety, accessibility, and code compliance without requiring full adherence to new construction standards.
Highlights:
- Limits storm shelter capacity to specific occupancies; removes travel distance requirement
- Requires IBC Chapter 14/26 compliance for major exterior wall replacements
- Mandates snow load evaluation when structural repairs involve substantial damage
- Applies enhanced classroom acoustics to educational buildings undergoing major alterations
- Permits rooftop equipment additions without full structural review under specific weight/load limits
- Requires seismic evaluation when changing occupancy from S or U to other types
- Exempts furniture like cubicles and shelving from permits and Level 2 classification
- Revises sprinkler installation thresholds for Level 2 and Level 3 alterations in high-risk areas
Who It’s For:
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The 2021 International Existing Building Code® (IEBC) offers a consistent, performance-based framework for repairing, altering, adding to, or changing the occupancy of existing buildings. It facilitates the reuse of older and historic structures while maintaining safety, accessibility, and code compliance without requiring full adherence to new construction standards.
Highlights:
- Limits storm shelter capacity to specific occupancies; removes travel distance requirement
- Requires IBC Chapter 14/26 compliance for major exterior wall replacements
- Mandates snow load evaluation when structural repairs involve substantial damage
- Applies enhanced classroom acoustics to educational buildings undergoing major alterations
- Permits rooftop equipment additions without full structural review under specific weight/load limits
- Requires seismic evaluation when changing occupancy from S or U to other types
- Exempts furniture like cubicles and shelving from permits and Level 2 classification
- Revises sprinkler installation thresholds for Level 2 and Level 3 alterations in high-risk areas
Who It’s For:
Contractors, architects, and code officials working on renovations, adaptive reuse, and code compliance for existing buildings—especially where full new-construction standards are impractical.
IEBC-2021




