Piping Inspection Code: In-service Inspection, Rating, Repair, and Alteration of Piping Systems
|Publication Date:||1 February 2016|
API 570 covers inspection, rating, repair, and alteration procedures for metallic and fiberglass-reinforce
Process piping systems that have been retired from service and abandoned in place are no longer covered by this "in service inspection" Code. However abandoned in place piping may still need some amount of inspection and/or risk mitigation to assure that it does not become a process safety hazard because of continuing deterioration. Process piping systems that are temporarily out of service but have been mothballed (preserved for potential future use) are still covered by this Code.
The intent of this Code is to specify the in-service inspection and condition-monitoring
API 570 shall not be used as a substitute for the original construction requirements governing a piping system before it is placed in-service; nor shall it be used in conflict with any prevailing regulatory requirements. If the requirements of this Code are more stringent than the regulatory requirements, then the requirements of this Code shall govern.
The term non-metallics has a broad definition but in this Code refers to the fiber reinforced plastic groups encompassed by the generic acronyms FRP (fiberglass-reinforc
Included Fluid Services
Except as provided in 1.2.2, API 570 applies to piping systems for process fluids, hydrocarbons, and similar flammable or toxic fluid services, such as the following:
a) raw, intermediate, and finished petroleum and chemical products;
b) catalyst lines;
c) hydrogen, natural gas, fuel gas, and flare systems;
d) sour water and hazardous waste streams;
e) hazardous fluid services;
f) cryogenic fluids such as: liquid N2, H2, O2, and air;
g) high-pressure gases greater than 150 psig such as: gaseous He, H2, O2, and N2.
Optional Piping Systems and Fluid Services
The fluid services and classes of piping systems listed below are optional with regard to the requirements of API 570:
a) hazardous fluid services below designated threshold limits, as defined by jurisdictional regulations;
b) water (including fire protection systems), steam, steam-condensate, boiler feed water, and Category D fluid services as defined in ASME B31.3;
c) other classes of piping that are exempted from the applicable process piping code.
Fitness-For-Service (FFS) and Risk-Based Inspection (RBI)
This inspection Code recognizes Fitness-For-Service concepts for evaluating in-service damage of pressure containing piping components. API 579-1/ASME FFS-1, Fitness-For-Service provides detailed FFS assessment procedures for specific types of damage that are referenced in this Code. This inspection Code also recognizes RBI concepts for determining inspection intervals or due dates and strategies. API 580 provides the basic minimum and recommended elements for developing, implementing, and maintaining a risk-based inspection (RBI) program for fixed equipment, including piping. API 581 provides a set of methodologies for assessing risk (both POF and COF) and for developing inspection plans.