Codes & Standards for Piping

Codes

Code is a document which is giving guidelines for Design, Construction & Installation. These guidelines are converted into law.

• The below are the codes that commonly used for Piping
• ASME B31.1 => Power Piping
• ASME B31.2 => Utility Piping
• ASME B31.3 => Process Piping
• ASME B31.4 => Liquid hydrocarbon transportation Pipeline
• ASME B31.5 => Refrigeration Piping and Heat transfer components
• ASME B31.8 => Gas transportation Pipeline
• ASME B31.8S => Managing System integrity of Gas Pipelines
• ASME B31.9 => Building services Piping 
• ASME B31.11=> Slurry transportation
• ASME B31.12=> Hydrogen Piping & Pipeline.

                    (ASME- American Society of Mechanical Engineers)

Standards

Standard is a document which is giving standard dimensions which are used for ease of interchangeability.

• Pipes (Ferritic steel) 
• CS/LTCS/LAS => ASME B36.10

• Stainless Steel (Austenitic steel) => ASME B36.19   
•  Fittings 
• Socket end fittings => ASME B16.11
• Threaded end fittings => ASME B16.11
• Buttweld end fitting => ASME B16.9
• Flanges
• Up to 24" => ASME B16.5
• Above 24" & Up to 60" => ASME B16.47 (Series A for Piping, Series B for Compact flanges mainly for rotating equipment's)
• 4" to 144" => AWWA (American Water Works Association)
• Orifice flanges => ASME B16.36  
• Gaskets
• Non Metallic => ASME B16.21
• Metallic => ASME B16.20
• Fasteners
• Stud Bolt & Machine Bolt => ASME B18.2.1
• Hex. Nut => ASME B18.2.2
• Spectacle Blind/Spacer/Blank => ASME B16.48
• Valves
• Socket welding & Threaded End => Length as per Manufacturing standard
• Buttweld, Flanged, Wafer End => Length as per ASME B16.10
• All valve design => ASME B16.34
• Standard for End preparation
• Socket Weld End preparation => ASME B16.11
• Butt Weld End preparation => ASME B16.25
• Threaded End preparation => ASME B1.20.1

Recommended Practices

            Guidelines set by the company or Group of companies, Number of such standard start with 'MSS'. Below are the few commonly used practices,

• MSS-SP-6 => Flange face finish
• MSS-SP-83 => Union
• MSS-SP-95 => Swage Nipples
• MSS-SP-97 => 'O' let fittings (Outlet fittings) 

            (MSS-SP => Manufacturing Standardization Society - Standard Practices)