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American Society of Mechanical Engineers

About the American Society of Mechanical Engineers

Founded in 1880 as the American Institute of Mechanical Engineers, ASME is a leading non-profit organisation that promotes the art, science, and practice of mechanical and multi-discipline engineering and allied sciences. Its mission is to advance engineering for the benefit of humanity, helping the global engineering community develop solutions to real world challenges.


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ASME B30.17:2020
Cranes and Monorails (With Underhung Trolley or Bridge)
ASME B89.6.2 : 1973 : R2017
Temperature and Humidity Environment for Dimensional Measurement
ASME Y14.5:2018
Dimensioning and Tolerancing
ASME B18.6.8 : 2010 : R2017
Thumb Screws and Wing Screws (Inch Series)
ASME B40.100:2022
Pressure Gauges and Gauge Attachments
ASME B31.3:2022
Process Piping
ASME B31.1:2022
Power Piping
ASME A17.1:2022/CSA B44:2022
Safety Code for Elevators and Escalators
ASME B1.5 : 1997 : R2014
ASME PASE : 2019
Safety Standard for Portable Automotive Service Equipment
ASME B16.5:2020
Pipe Flanges and Flanged Fittings: NPS 1/2 through NPS 24, Metric/Inch Standard
Welding, Brazing, and Fusing Qualifications
ASME B16.25:2022
Buttwelding Ends
ASME PTC 25:2023
Pressure Relief Devices
ASME A90.1:2023
Safety Standard for Belt Manlifts
ASME B31.12:2023
Hydrogen Piping and Pipelines
ASME B16.20:2023
Metallic Gaskets for Pipe Flanges
ASME B16.38:2023
Large Metallic Valves for Gas Distribution x Manually Operated, NPS 21 ⁄ 2 (DN 65) to NPS 12 (DN 300), 125 psig (8.6 bar) Maximum
ASME TES-1:2023
Safety Standard for Thermal Energy Storage Systems: Molten Salt
ASME B31P:2023
Standard Heat Treatments for Piping
ASME HST-5:2020
Performance Standard for Air Chain Hoists
ASME OM:2022
Operation and Maintenance of Nuclear Power Plants
ASME PVHO-1:2023
Safety Standard for Pressure Vessels for Human Occupancy
ASME B1.1:2019
Unified Inch Screw Threads (UN, UNR, and UNJ Thread Forms)
ASME RAM-1:2020
Reliability, Availability, and Maintainability of Equipment and Systems in Power Plants
ASME B46.1 : 2019
Surface Texture (Surface Roughness, Waviness, and Lay)
ASME TDP-1:2023
Prevention of Water Damage to Steam Turbines Used for Electric Power Generation: Fossil Fueled Plants
ASME B1.20.3:1976(R2023)
Dryseal Pipe Threads, Inch
ASME B30.25:2018(R2023)
Safety Standard for Cableways, Cranes, Derricks, Hoists, Hooks, Jacks, and Slings
ASME B107.400:2018(R2023)
Striking Tools
ASME B107.410:2018(R2023)
Struck Tools
ASME B94.9:2008(R2023)
Taps: Ground Thread With Cut Thread Appendix (Inch And Metric Sizes)
ASME B16.44:2023
Manually Operated Metallic Gas Valves for Use in Aboveground Piping Systems Up to 5 psi
ASME B89.1.9:2023
Gage Blocks
ASME B29.17M:1998(R2023)
Hinge Type Flat Top Conveyor Chains and Sprocket Teeth
ASME B89.3.7:2013(R2023)
Granite Surface Plates
ASME B29.400:2001(R2023)
Combination, "H"-Type Mill Chains, and Sprockets
ASME A112.19.17:2010(R2023)
Manufactured Safety Vacuum Release Systems (SVRS) for Residential and Commercial Swimming Pool, Spa, Hot Tub, and Wading Pool Suction Systems
ASME PTC19.6:2018(R2023)
Electrical Power Measurements
Metal fittings
Gas and steam turbines. Steam engines
Lifts. Escalators
Flanges, couplings and joints
Other lifting equipment
ASME PTC 4.4:2023
Gas Turbine Heat Recovery Steam Generators
ASME A18.1:2023
Safety Standard for Platform Lifts and Stairway Chairlifts
ASME/ANS RA-S-1.1:2024
Standard for Level 1/Large Early Release Frequency Probabilistic Risk Assessment for Nuclear Power Plant Applications
ASME A112.19.1/CSA B45.2:2024
Enamelled cast iron and enamelled steel plumbing fixtures
ASME RTP-1:2023
Reinforced Thermoset Plastic Corrosion-Resistant Equipment
ASME A17.3:2023
Safety Code for Existing Elevators and Escalators
ASME B30.30:2023
ASME PTC 25:2023
Pressure Relief Devices
ASME B16.33:2024
Manually Operated Metallic Gas Valves for Use in Gas Piping Systems up to 175 psi
ASME A90.1:2023
Safety Standard for Belt Manlifts
ASME B31P:2023
Standard Heat Treatments for Piping
ASME B107.56:2018(R2023)
Body Repair Tools
ASME B107.400:2018(R2023)
Striking Tools
ASME B89.1.9:2023
Gage Blocks

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Frequently Asked Questions

A standard enhances the safety of industry operations, assures quality, and help keep costs down to reduce waste and minimise confusion.

The American Society of Mechanical Engineers has the responsibility for developing and maintaining ASME Standards, enabling collaboration, knowledge sharing, and skill development across all engineering disciplines, while promoting the vital role of the engineer in society. ASME codes and standards, publications, conferences, continuing education, and professional development programs provide a foundation for advancing technical knowledge and a safer world.

Often mistaken as a government body, The American Society of Mechanical Engineers is an independent non-governmental organisation with over 85,000 members in over 135 countries.   

Alongside its role as the leading organisation for standard development and contribution to international standards, the American Society of Mechanical Engineers is involved with various industries and has an evolving portfolio across pressure technology, power plants, elevators, construction equipment, piping, nuclear components, and more. These standards contribute to the positive impact on safety, quality, and efficiency in industries worldwide.  

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