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ASME B31.1 (Power Piping) VS ASME B31.3 (Process Piping)

If you are searching for differences between ASME B31.1 (Power Piping) and ASME B31.3 (Process Piping), your search have been successful. As we have skilled professional piping engineers with vast experience in a variety of projects over more than 15 years, we decided to list the main differences between ASME B31.1 and ASME B31.3.

ASME B31.1

ASME B31.3

ASME B31.3, Process Piping, is an American Society of Mechanical Engineers (ASME) standard that provides requirements for piping typically found in petroleum refineries, chemical, pharmaceutical, and other process plants. The standard covers materials, design, fabrication, assembly, erection, examination, inspection, and testing of piping.

ASME B31.3 is a code that applies to the design, construction, fabrication, assembly, erection, examination, inspection, and testing of piping. It establishes requirements for materials, components, design, fabrication, assembly, erection, examination, inspection, and testing of piping that is used to transport fluids in process plants and other industrial facilities. The requirements of ASME B31.3 are organized into several sections, including:

General Requirements






Examination, Inspection, and Testing

Repairs and Alternations

Pressure Testing

Piping System Components

Nonmetallic Piping

Special Piping Components

Process Piping

Flanged Fittings

Threaded Fittings

Welded Fittings


Flexible Hose Connectors


• Supports

Special Piping Components

Nonmetallic Piping

Thermal Expansion

Expansion Joints

Identification and Marking

Quality Control

Quality Assurance

Inspection and Testing

Repairs and Alterations

ASME B31.1 is an American Society of Mechanical Engineers (ASME) standard that covers the requirements for the design, fabrication, installation, inspection, and testing of power piping systems. It is applicable to all piping systems operating at temperatures between -20 and 800°F (-29 and 427°C). The document outlines the requirements for materials, welding, and brazing, as well as requirements for pressure design and safety. It also outlines requirements for valve installation, pipe supports, and other safety-related topics. The standard also includes requirements for testing and inspection, as well as acceptance criteria for use in the field.

ASME B31.1 is a code of practice for the design, fabrication, installation, inspection, testing and maintenance of power boilers. The Code covers rules for construction of power boilers, electric boilers, miniature boilers, and high temperature water boilers. The code also outlines requirements for safety valves, pressure relief devices, and other safety related items. In addition, ASME B31.1 provides requirements for materials, welding, non-destructive testing, and erection of power boilers.

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Located in Calgary, Alberta; Vancouver, BC; Toronto, Ontario; Buena Park, California, We offer our Piping Engineering Services, Skid Design Services, Pipeline Engineering Services and Structural Engineering Services across Canada. To get our Piping Stress Analysis Services, please contact our Engineering company.

Our professional piping stress engineers have a bachelor's and Masters degree in mechanical / structural engineering and province license (P.Eng.) in Alberta, Saskatchewan, British Columbia and Ontario. We review, validate, certify and stamp piping and structural packages. Also check Industries We Serve.

We provide premium piping engineering & full-service pipe design and pipeline / pipe stress analysis services, from initial concept through final construction. We serve all types of industries across Canada & globally. Using CAESAR II and pipe stress calculations as per API, ASME B31.3, B31.1, B31.8, B31.4, B31.9, CSA Z662.

Located in Calgary, AlbertaVancouver, BCToronto, OntarioEdmonton, AlbertaHouston TexasTorrance, CaliforniaEl Segundo, CAManhattan Beach, CA; Concord, CA; We offer our engineering consultancy services across Canada and United States. Meena Rezkallah.

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