While BPVC covers vessels, B31 covers the pipes connecting them.
The history of ASME is deeply intertwined with industrial safety. In the late 19th century, the rapid rise of steam power led to over in just one decade. asme mechanical engineering
This is essential for design engineers. It defines the symbols and rules for communicating design intent on engineering drawings. If you want a part to fit perfectly with another, you need to master Y14.5. While BPVC covers vessels, B31 covers the pipes