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Inspection and Test Requirement of Control Valves

Inspection and Test Requirement of Control Valves

  • Visual Test as per MSS SP-55
  • Dimensional Test:
    • Face-to-face dimensions as per ANSI/ISA-75.08.01, ANSI/ISA-75.08.06, and ASME B16.10.
    • Flange facings and dimensions as per ASME B 16.5
  • Check of Body Marking as per ASME B 16.5, ASME B 16.34, and MSS-SP 25.
  • Chemical analysis and mechanical properties as per the applicable ASTM material code
  • Nondestructive test as per ASME B 16.34
  • Hydrostatic test as per ASME B 16.34 or MSS-SP61
  • Seat leakage test as per ANSI/FCI 70-2.
  • Actuator Leakage Test at 1.5 times maximum design pressure.
  • Functional and Performance test (i.e. hysteresis plus deadband, linearity, repeatability, etc) as per IEC 60534-4 and ISA 75.13.01
  • For electrical accessories (such as solenoid valve, I/P positioner, position transmitter etc):
    • Functional Test
    • Electrical type and routine test as per IEC 61010-1

Inspection of Control Valves

Applicable Standards and Codes of Control Valves :

MSS SP-55

Quality Standards for Steel Castings for Valves, Flanges, Fittings and Other Piping Components – Visual Method for Evaluation of Surface Irregularities.

IEC 60534-3-1

Industrial-Process Control Valves – Part 3-1: Dimensions – Face-to-Face Dimensions for Flanged, Two-Way, Globe-Type, Straight Pattern and Centre-to-Face Dimensions for Flanged, Two-Way, Globe-Type, Angle Pattern Control Valves

ASME B 16.10

Face-to-Face and End-to-End Dimensions of Valves

ASME B 16.5

Pipe flanges and flanged fittings NPS 1/2 through NPS 24 metric/inch standard

ASME B 16.34

Valves – Flanged, threaded and welding ends

MSS-SP61

Pressure Testing of Valves

ANSI/FCI 70-2

Control Valve Seat Leakage

MSS-SP 25

Standard Marking System for Valves, Fittings, Flanges, and Unions

IEC 60534-4

Industrial-Process Control Valves – Part 4: Inspection and Routine Testing

ISA 75.13.01

Method of Evaluating the Performance of Positioners With Analog Input Signals and Pneumatic Output

IEC 61010-1

Safety requirements for electrical equipment for measurement, control, and laboratory use – Part 1: General requirements.

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