1 SCOPE ……………………………………………………….
2 REFERENCES ……………………………………………………….
3 GENERAL ……………………………………………………….
3.1 General Requirements …………………………..
4
INSPECTION AND TESTING ……………………………………………………….
4.1
Inspection ……………………………………………………….
4.2 Hydrotest ……………………………………………………….
4.3 Seat Leakage Test ……………………………………………………….
4.4 Valve Travel Test ……………………………………………………….
4.5 Control Valve Dynamic Performance Test …………………………..
4.6 Fire Test ……………………………………………………….
5 REPORT ……………………………………………………….
6 REVISION HISTORY ……………………………………………………….
1 Scope
This specification establishes the minimum requirements for inspection and testing of control
and On-Off valves.
2 References
Reference is made in this standard to the following documents. The latest issues, amendments
and supplements to these documents shall apply unless otherwise indicated.
SABIC Engineering Standards (SES)
Q01-T07 Materials Identification Program
R07-E01 Selection of Control Valve
R07-E03 On-Off Valves
International Electrotechnical Commission
60534-4 Industrial – process control valves – Part 4: Inspection and routine testing
International Society for Automation and Control
75.05.01 Control Valve Terminology
75.19.01 Hydrostatic Testing of Control Valves
75.25.01 Test Procedure for Control Valve Response Measurement from Step Inputs
American National Standards Institute / American Society of Mechanical Engineers
70-2 Control valve Seat Leakages
American Petroleum Institute
STANDARD 607 Fire Test for Quarter-turn Valves and Valves Equipped with Nonmetallic Seats
Process Industry Practices (PIP)
PCECV001 Guidelines for Application of Control Valves
3 General
3.1 General Requirements
3.1.1 If specified, vendor shall notify SABIC representative at least four weeks in advance that the
control valves and on-off valves are ready for inspection.
3.1.2 Control and on-off valves shall be inspected completely assembled, including mounting of all
required accessories like positioner, booster, lock-up relay, quick exhaust, etc.
3.1.3 Valves shall be released for shipment upon completion of the inspection, witness and
clearance of all punch list items.
3.1.4 For control valve terminology and definitions, refer to ISA 75.05.01.
3.1.5 SES-R07-E01, SES-R07-E03, project specifications and data sheets shall be the basis for the
valve inspection, and compliance to these standards shall be validated during the valve
inspection.
3.1.6 Positive material identification shall be performed for all alloy steel valves. PMI test shall
comply with SES Q01-T07.
3.1.7 Vendor shall demonstrate manfacturating system complies with ISO 9001 quality system.
3.1.8 Valve body material test shall be perfomed as per PIP PCECV001.
4 Inspection and Testing
Inspection and testing included in this document are the minimum inspections and tests that
shall be performed to any control and on-off valve. Any additional requirement shall be included
in project specifications or data sheets.
4.1 Inspection
4.1.1 Visual inspection shall be performed in accordance with manufacturer procedure, and shall
include; fail position, components, conformity to specifications, and dimensional check with
approved drawings.
4.2 Hydrotest
4.2.1 The control valve assembly shall be hydrotested as per the test procedure outlined in ISA
75.19.01.
4.2.2 Test pressure gauge shall have a certified accuracy of ± 1.0 percent and a valid test
certificate. Use of redundant gauges for pressure measurement is preferred.
4.2.3 Clean potable water shall generally be used for hydrostatic testing. The temperature of the
test fluid shall be between 5 deg C to 52 deg C, and the pH shall be inbetween 6 to 8.
4.2.4 Where water cannot be used, other liquids may be used as agreed upon between SABIC and
the vendor.
4.2.5 The valve cavity shall be drained and thoroughly dried with air or nitrogen.
4.2.6 Hydrostatic testing of stainless steel valves or valves containing stainless steel internals
subject to stress by the manufacturing process or operating temperatures above 60 deg C
require special consideration. Water shall be steam condensate, de-mineralized water, or
clean, potable water with chloride content less than 10 ppm. Potable water up to a maximum
of 250 ppm chlorides may be used if the valve is drained immediately and washed out
thoroughly with de-mineralized water or steam condensate and dried thoroughly with dry air
or nitrogen.
4.3 Seat Leakage Test
4.3.1 Control and on off valve seat leakage test shall be performed as per ANSI FCI 70-2.
4.3.2 Seat leakage test at site shall be required for Class V and VI valves.
4.4 Valve Travel Test
4.4.1 Control valve shall be adjusted with the packing at normal tightness for full travel over a
change in signal pressure between 0.2 to 1 barg, for pneumatic postioners, 4 to 20 mA for
electropneumatic positioners and 0 to 100 percent for foundation fieldbus postioners.
4.4.2 Control valve allowable bench setting tolerances for pneumatic inputs are 0.2 ± 0.01 and 1.0
± 0.01 barg for full valve travel. Allowable tolerances for electronic inputs are 4 ± 0.1 mA and
20 ± 0.1 mA for full travel.
4.4.3 Valve travel test shall be performed at factory prior to shipment and at site prior to installation.
Calibration reports shall be prepared after valve travel test.
4.4.4 During valve travel tests, all tubing connections, fittings, diaphragm closures, accessories etc.
shall be checked for air leak.
4.5 Control Valve Dynamic Performance Test
4.5.1 Control valve dynamic performance test, shall be perfomed only to selected control valves, as
indicated in project specifications.
4.5.2 Dynamic performance test methods shall be as per ISA 75.25.01.
4.5.3 For this test, the valve shall be assembled with the positioner. Packing shall be tightened as
required for the intended service conditions.
4.5.4 The maximum dead band error shall be in accordance with IEC 60534-4 requirements.
4.5.5 The maximum allowable dead time Td of the control valve assembly for any step change in
the range of 2 to 5 percent of the full travel is given in Table I.
Table I Maximum Allowable Dead Time
4.5.6 The maximum allowable Step Response Time T86 of the control valve assembly for any step
change in the range of 2 to 5 percent of valve full travel should be as per Table II, unless a
faster step response time is specified in the specification sheet.
Table II Maximum Allowable Step Response Time
4.6 Fire Test
4.6.1 Certified fire test reports shall be provided for control and on-off valves specified as fire safe
valves.
4.6.2 Fire safe valves shall meet API Standard 607 for fire leak test requirement.
5 Report
Test reports shall be presented in manufacturer standard forms for SABIC approval.