Butt Weld Fittings
Piping comes in sizes that are designated by a nominal diameter, all piping is designed in accordance with A.S.M.E. (American Society of Mechanical Engineers) codes. Material properties, diameters and wall thicknesses must conform to code.
The two most common codes are:
B31.1 Power Piping
B31.3 Process Piping
The piping engineer in determining the size and material of the piping, uses these codes to perform the calculations, then will list all the pipe, components and valves to be used for a particular service e.g. steam, in the piping specifications which must be used by the Designer in completing the piping layout and detail drawings.
Chapter 1. Piping
3.1 Piping
3.2 Pipe Manufacture
3.3 Pipe Fabrication Practices
3.3.1 Shop Fabrication
3.3.2 Field Fabrication
3.3.3 Modular Design
3.3.4 Pressure Testing
3.4 Pipe Designation
3.5 Fittings
3.5.1 Butt Weld Fittings
3.5.2 Threaded and Socket Weld Fittings
3.5.3 Victaulic Fittings
3.5.4 Compression Fittings
3.6 Branch Connections
3.7 Flanges
3.8 Shop Inspection
3.9 Installation
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