This Practice provides guidelines for selecting PIP Piping Material Specifications (PMSs) for various services. This Practice lists common process industry fluid services and the corresponding PIP PMSs which are typically suitable for each service under the conditions listed, if any. The PSI lists common services and corresponding recommended PIP PMSs. The PIP PMS selection recommendations shown in the PSI are based on common fluid services. Before making a final selection of a PIP PMS, design conditions should be compared with conditions shown (if any) in the Remarks column. The effects of other associated variables should also be evaluated. Verification that “soft goods” (e.g., seals, seats, gaskets, packing, etc.) in valves specified in recommended PIP PMSs are appropriate for the actual service is recommended.