ESSO EXPLORATION &
PRODUCTION CHAD INC.
ECS 3-14-2
CHECK VALVES
Page 1 of 5
SPECIFICATION Rev. 3 APR 2001
Rev. Prepared By Reviewed By Approved By
Date
No. Discipline Engineering Project
Engineer Manager Engineer / Manager
1 14 NOV 95 B. BALLAY M. MENZIES A. KAHN
2 30 SEP 97 C. KABIRI P.R. SCHELTON M.A. JONES
3 11 MAY 01 G. HASNESS DB FOR MAJ
ESSO EXPLORATION &
PRODUCTION CHAD INC.
ECS 3-14-2
CHECK VALVES
Page 2 of 5
SPECIFICATION Rev. 3 APR 2001
TABLE OF CONTENTS
SCOPE ....................................................................................................................................................3
SUMMARY OF ADDITIONAL REQUIREMENTS...................................................................................3
DESIGN ...................................................................................................................................................3
MATERIALS............................................................................................................................................4
INSPECTION AND TESTING .................................................................................................................4
LIST OF TABLES
Table 1 ....................................................................................................................................................3
Revision 3 Memo
APR\2001 To update and reflect current code references and requirements.
ESSO EXPLORATION &
PRODUCTION CHAD INC.
ECS 3-14-2
CHECK VALVES
Page 3 of 5
SPECIFICATION Rev. 3 APR 2001
SCOPE
1.1 This practice covers additional requirements for the design, inspection, and testing of
steel, cast iron, or ductile iron, single and dual plate type check valves.
1.2 An asterisk (*) indicates that additional information is provided by ESSO in an
addendum to this specification.
1.3 A pound sign (#) indicates that ESSO review/approval is required before design is
finalized or equipment is purchased.
SUMMARY OF ADDITIONAL REQUIREMENTS
2.1 Table 1 lists the specification and standards which shall be used with this specification.
2.2 The equipment and materials used shall conform to the latest editions, revisions and
addenda of the codes, standards and regulations listed in Table 1.
Table 1
R3
ECS Specification
ECS 3-12-9 General Requirements for Valves
API Standards
6D Pipeline Valves (Gate, Plug Ball, and Check Valves)(1)
594 Check Valves: Wafer, Wafer-Lug and Double-Flanged Type
598 Valve Inspection and Testing
600 Steel Gate Valves, Flanged and Buttwelding Ends; Bolted
and Pressure Seal Bonnets
ASME Standards
B1.20.1 Screw Threads - Pipe Threads, General Purpose (inch)
B16.1 Cast Iron Pipe Flanges and Flanged Fittings
B16.10 Face-to-Face and End-to-End Dimensions of Valves
B16.34 Valves - Flanged, Threaded and Welding End
ASTM Standard
A488/A488M Steel Castings, Welding, Qualifications of Procedures and
Personnel
Note 1 - Use of API 6D valves is limited to ASME B31.4 and B31.8.
2.3 For flanged, threaded, welding-end check valves, only the applicable requirements of
API 594 shall be used, except as modified in this practice.
DESIGN
ESSO EXPLORATION &
PRODUCTION CHAD INC.
ECS 3-14-2
CHECK VALVES
Page 4 of 5
SPECIFICATION Rev. 3 APR 2001
3.1 Pressure-temperature ratings for cast iron valves shall be per ASME B16.1.
3.2 Valves shall be of the self-closing type (gravity or spring assisted) and shall not depend
on flow reversals to affect closure.
3.3 Flanged and welding-end check valves shall have a bolted cap.
3.4 For design temperatures >315ºC (600ºF), threaded retainer plugs for hinge pins shall be
seal welded if valves are used in flammable materials service.
3.5 Threaded valves shall have internally tapered threads.
3.6 Single layer corrugated metal gaskets are not acceptable for cap flange joints.
3.7 Vendor's drawings for counterweighted check valves shall clearly indicate whether the
counterweights are provided to assist quick closure or to provide damping. They shall
also indicate the weight and centre of gravity of all components attached to the hinge
pin, and the required counterweight location.
#3.8 Counterweight design for check valves in high temperature >315ºC (600ºF) service shall
be submitted to ESSO for approval.
MATERIALS
R3 4.1 Trim materials shall be per API 594 Par. 5.3 for the TRIM No. specified, and the
following:
a. For TRIM No. 3 (F310) and TRIM No. 8 (F6/Co Cr A)) material, the selection of
electrodes for deposited seating surfaces and the hardness values for seating
surfaces shall be per API 600 Par. 3.9.
b. Soft seal seating material will be specified.
4.2 Hinge pin retainer plugs shall not be made from cast iron or ductile iron.
INSPECTION AND TESTING
R3 5.1 Pressure tests shall be conducted per API 598. The latest API 594 so to pressure test
in accordance with API 598.
ESSO EXPLORATION &
PRODUCTION CHAD INC.
ECS 3-14-2
CHECK VALVES
Page 5 of 5
SPECIFICATION Rev. 3 APR 2001
5.2 A high pressure closure test shall be specified only for prototype valves. A valve shall
be considered as a prototype if:
a. The manufacturer has made significant changes to its standard design.
b. The manufacturing facility has no previous experience with the particular valve
model.
5.3 Repairs in the shell of a cast or forged steel valve shall comply with ASTM A488/A488M.
5.4 Defects found in cast or ductile iron castings may not be repaired, and the defective
castings shall not be used.
5.5 If tight shut-off is specified, no leakage shall be permitted in the low pressure seat test.
