B31 Code for pressure piping, developed by American Society of Mechanical Engineers – ASME, covers Power Piping, Fuel Gas Piping, Process Piping, Pipeline Transportation Systems for Liquid Hydrocarbons and Other Liquids, Refrigeration Piping and Heat Transfer Components and Building Services Piping. ASME B31 was earlier known as ANSI B31. Here is a list of standards covered under ASME B31.
| Sr. | Number | Title |
| 1 | B31.1 | Power Piping |
| 2 | B31.2 | Fuel Gas Piping |
| 3 | B31.3 | Process Piping |
| 4 | B31.4 | Pipeline Transportation Systems for Liquid Hydrocarbons and Other Liquids. |
| 5 | B31.5 | Refrigeration Piping and Heat Transfer Components. |
| 6 | B31.8 | Gas Transmission and Distribution Piping Systems. |
| 7 | B31.8S | Managing System Integrity of Gas Pipelines. |
| 8 | B31.9 | Building Services Piping. |
| 9 | B31.11 | Slurry Transportation Piping Systems. |
| 10 | B31.12 | Hydrogen Piping and Pipelines. |
| 11 | B31G | Manual for Determining Remaining Strength of Corroded Pipelines. |