What are Engineering Standards?
Standards and Codes
Standards, codes, specifications are extremely important - often essential - technical documents in engineering and related technical fields.
Standards.. a technical standard is an established norm or requirement. It is usually a formal document that establishes uniform engineering or technical criteria, methods, processes and practices. The documents prepared by a professional group or committee which are believed to be good and proper engineering practices and which contain mandatory requirement.
Codes.. a code is a set of rules and specifications or systematic procedures for design, fabrication, installation and inspection methods prepared in such a manner that it can be adopted by legal jurisdiction. Codes can be approved by local, state or federal governments and can carry the force of law. The main purpose of codes is to protect the public by setting up the minimum acceptable level of safety for buildings, products and processes.
Pipe Fabrication Institute
The Pipe Fabrication Institute (PFI) publishes advisory Engineering Standards (ES) and Technical Bulletins (TB) intended to serve the needs of the pipe-fabricating industry at the design level and in actual shop operations.
The PFI standards contain minimum requirements; however, the designer or fabricator may consider specifying additional requirements beyond the scope of PFI publications. The use of PFI standards or bulletins is voluntary. A listing of PFI publications follows..
The primary purpose of the Pipe Fabrication Institute is to promote the highest standards of excellence in the pipe fabrication industry.
Engineering and Fabrication
Method of Dimensioning Piping Assemblies
Minimum Length and Spacing for Welded Nozzles
Access Holes, Bosses, and Plugs for Radiographic Inspection of Pipe Welds
Welded Load Bearing Attachments to Pressure Retaining Piping Materials
Branch Reinforcement Work Sheets
Method of Dimensioning Grooved Piping Assemblies
Drafting Practices Standard
Welding and Fabrication
Internal Machining and Solid Machined Backing Rings For Circumferential Butt Welds
Internal Machining and Fit-up of GTAW Root Pass Circumferential Butt Welds
Pipe Bending Methods, Tolerances, Process and Material Requirements
Nonsymmetrical Bevels and Joint Configurations for Butt Welds
Recommended Practice for Local Post-Weld Heat Treatment
Welding of Internally Clad Piping
Guidelines for Installation of Integrally Reinforced Branch Connection Outlet Fitting
Cleaning, Painting, and Shipping
Cleaning of Fabricated Piping
Internal Abrasive Blast Cleaning of Ferritic Piping Materials
Standard for Protection of Ends of Fabricated Piping Assemblies
Temporary Painting/Coating of Fabricated Piping
Standard for Loading and Shipping of Piping Assemblies
Permanent Marking on Piping Materials
Recommended Practice for Color Coding of Piping Materials
Fabricating Tolerances for Grooved Piping Systems
Standard for Material Control and Traceability of Piping Components
Standard for Protection of Austenitic Stainless Steel and Nickel Alloy Materials
Examination and Testing
Hydrostatic Testing of Fabricated Piping
Wall Thickness Measurement by Ultrasonic Examination
"Visual Examination" The Purpose, Meaning and Limitation of the Term
Standard for Positive Material Identification of Piping Components using Portable X-Ray Emission Type Equipment
Examples of Engineering Standards
Table of contents
Scope, codes, standards and references
General and specific requirements
Abbreviations for piping specifications
Valve tag numbering
Standard installation detail - Utility Station
Special fabricated larger diameter reducers
Four weld 90° LR Miter elbow
Two weld 45° LR Miter elbow
Perforated temporary conical strainers
Product sampler cooler
Tolerances for pipe fabrication
Line Blinds NPS 1/2 - NPS 60