scope:

Rules for the Process Piping Code Section B31.3 have been developed considering piping typically found in petroleum refineries; chemical, pharmaceutical, textile, paper, semiconductor, and cryogenic plants; and related processing plants and terminals.

Content and Coverage

(a) This Code prescribes requirements for materials and components, design, fabrication, assembly, erection, examination, inspection, and testing of piping.

(b) This Code applies to piping for all fluids, including:

(I) raw, intermediate, and finished chemicals;

(2) petroleum products;

(3) gas, steam, air, and water;

(4) fluidized solids;

(5) refrigerants; and

(6) cryogenic fluids.