ANSI/FCI 15-1-2015 pdf free download

ANSI/FCI 15-1-2015 pdf free download.AMERICAN NATIONAL STANDARD STANDARD FOR PRODUCTION TESTING OF PRESSURE REGULATORS.
1. PURPOSE This standard establishes minimum guidelines for production testing of pressure regulators for use by manufacturers, specifiers, inspectors, and users to ensure testing of atmospheric leak tightness and seat leakage are completed at the factory before shipment. 2. SCOPE and LIMITATIONS 2.1. This standard provides guidelines for documenting minimum production tests and determining pass/fail criteria for pressure regulators undergoing production tests in a manufacturing facility. It applies to most designs including self and pilot operated pressure reducing regulators, differential pressure regulators, pressure loaded regulators, and regulators with or without internal relief valves. 2.2. Certifications documenting the testing can be requested by the manufacturer upon ordering. 2.3. This standard includes pressure regulators which may have two static pressure ratings, one for the portion of the regulator subjected to the inlet pressure and the other for the portion subjected to the outlet pressure. 2.4. This standard does not cover capacity testing of pressure regulators which is covered in ANSI/FCI 99-2 and is not normally tested during a production test.
2.5. This standard does not cover testing for leakage through pressure boundary shells that would be identified during a production hydrotest. This hydrotest procedure is covered in ANSI/FCI 4-1. 2.6. Relief valves or backpressure regulators are not included in this standard. 2.7. This standard does not cover temperature regulators. 2.8. This standard is not intended to supersede existing standards for regulators in specific applications such as those for gas appliance pressure regulators, for high pressure regulators for gas cylinders, or for fluid power regulators in machinery operations 3. DEFINITIONS 3.1. Controlled Variable. The variable which shall be monitored by the controlling process. This variable is either the outlet pressure or the differential pressure. 3.2. Diaphragm. A flexible element used to sense the outlet pressure (controlled variable.) The diaphragm also works to regulate the controlled variable in combination with the loading spring and valve plug linkage. Diaphragms are usually made from an elastomeric or metallic material. 3.3. Differential Pressure Regulator. A pressure regulator that maintains a constant differential pressure between a reference pressure and the pressure of the controlled fluid.
3.4. Internal Relief Valve. An internal mechanism that relieves excessive outlet pressure through the diaphragm and vent assembly. The internal relief set point is a function of the regulator’s set point and the maximum allowable build-up of downstream pressure allowed by the user’s application and is considered when the regulator is sized and selected. 3.5. Lockup (Dead End Shutoff). The deviation of the controlled variable from set point obtained at a no flow position. 3.6. Pilot Operated Regulator. Pilot operated regulators are a combination of a primary (pilot valve or pilot) and secondary regulator (main valve). The primary regulator senses and amplifies the pressure signal of the controlled variable. The amplified signal is sensed by the secondary regulator, which adjusts to maintain the controlled variable at the set point value. The pilot may be internal or external. 3.7. Pressure Regulator. A pressure regulator as covered by this standard is a self contained and self powered device that serves to automatically maintain a pressure at a controlled value (setpoint) over a specified flow. 3.8. Pressure Loaded Regulator. A regulator that relies on a reference pressure applied to the diaphragm in an enclosed chamber above the diaphragm by a suitable fluid from an external source. This pressure may add to the force of the spring or be the only force determining the setpoint of the regulator. 3.9. Seat Leakage. The quantity of test fluid passing through an assembled regulator in the lockup position. Seat leakage classifications are covered in ANSI/FCI 70-3. 3.10. Supply Pressure. The inlet pressure used for the pressure regulator under test. 3.11. Pulsation, hunting, or chattering. An unstable state in which there is oscillation of the regulator diaphragm, linkage and/or mechanisms that causes noise and/or the fluctuation of the controlled variable. 3.12. Rated Capacity.