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Certified Integrity Inspections • Every 20 years for tanks/vessels in Hazardous Substance service; • Every 20 years for tanks/vessels greater than 10,000 gallons capacity and in other service; • If evidence of material stress appears; • If tank or vessel leaks occur; • Before there is a change in service to a dissimilar stored material; or • If a tank or vessel is relocated. 7.7.12 ASME B31.3 — Process Piping ASME B31.3—Process Piping167 is the generally accepted standard of minimum safety requirements for the oil, petrochemical, chemical, pharmaceutical,textile, paper, and semiconductor industries' process piping design and construction (for process piping already in service, other standards should be used, such as API 570, "Piping Inspection Code").ASME B31.3 is written to be very broad in scope to cover a range of fluids, temperatures, and pressures.This broad coverage leaves a great deal of responsibility with the owner to use good engineering practices.The safety requirements for the design, examination, and testing of process piping vary in stringency based on four different categories of fluid service. Categories include: • Category D for a low hazard of fluid service, • Category M for a high hazard of fluid service, • High Pressure for piping designated by the owner as being in high pressure fluid service 1611, and • Normal to indicate all remaining fluid services. It is the owner's responsibility to select the appropriate fluid service category,which determines the appropriate examination requirements. ASME B31.3 distinguishes between inspection and examination. Inspection "applies to functions performed for the owner by the owner's Inspector or the Inspector's delegates."The owner is responsible, through the Inspector,for verifying that the required examinations and testing have been completed.The examination of process piping is to be completed by an examiner who demonstrates sufficient qualifications to perform the specified examination and who has training and experience records kept by his/her employer that 167 ASME Code for Pressure Piping,631.3-2008,"Process Piping,"The American Society of Mechanical Engineers,revision of ASME 31.3-2006,2008. les High Pressure is considered in ASME 831.3 to be pressure in excess of that allowed by the ASME b16.5 Class 2500 rating for the specified design temperature and material group;however,there are not specified pressure limitations for ASME 631.3. SPCC GUIDANCE FOR REGIONAL INSPECTORS 7-76 December 16, 2013