*note: this is the sample document for the related job only
*author: theprocedure@engineer.com
TABLE OF CONTENTS
1. SCOPE
2. REFERENCES
3. GENERAL REQUIREMENTS
4. PNEUMATIC TEST
5. EQUIPMENT FOR HYDROSTATIC TEST
6. PREPARATION OF THE TEST PACKAGE
7. LIMITATION, EXCEPTIONS AND EXCLUSIONS
8. FIELD PREPARATION
9. PERFORMANCE OF PRESSURE TEST
10. EVALUATION OF TEST RESULTS
11. REPORT / DOCUMENTATION
12. REINSTATEMENT
13. ATTACHMENT 1 (TEST MANIFOLD)
1.0 SCOPE
1.1 This procedure covers the minimum requirements and plans for field pressure test of piping system for
1.1 This procedure covers the minimum requirements and plans for field pressure test of piping system for
The EPCC of Two (2) nos additional crude Storage Tanks.
2.0 REFERENCE
2.1 ANSI / ASME B31.3 - Chemical Plant and Petroleum Refinery Piping
3.0 GENERAL REQUIREMENT
3.1 All piping lines shall be hydrostatic tested, but however, lines which where indicated in the line list may
2.0 REFERENCE
2.1 ANSI / ASME B31.3 - Chemical Plant and Petroleum Refinery Piping
3.0 GENERAL REQUIREMENT
3.1 All piping lines shall be hydrostatic tested, but however, lines which where indicated in the line list may
be service test.
3.2 All lines which were indicated as a tie-in joint need to do 100% NDT such as RT, MPI or DPT and
3.2 All lines which were indicated as a tie-in joint need to do 100% NDT such as RT, MPI or DPT and
carry out the service test.
3.3 The minimum test pressure shall be as specified in each piping Iso drawing or pressure test flow
3.3 The minimum test pressure shall be as specified in each piping Iso drawing or pressure test flow
diagram based on ANSI / ASME B31-3 requirement.
3.4 Test medium shall be fresh water, which clean and free from silt or un dissolved solids of any
3.4 Test medium shall be fresh water, which clean and free from silt or un dissolved solids of any
description.
3.5 Test medium for austenitic stainless steel piping the water shall not contain more than 30 ppm chloride
3.5 Test medium for austenitic stainless steel piping the water shall not contain more than 30 ppm chloride
10N.
3.6 All the equipment and lines, which are to be tested along with the piping, shall be blanked off or
3.6 All the equipment and lines, which are to be tested along with the piping, shall be blanked off or
replaced with temporary spool pieces. Any test along the said item shall be approved by Contractor.
3.7 All pressure gauge and pressure recorder used for the test shall be calibrated and registered in
3.7 All pressure gauge and pressure recorder used for the test shall be calibrated and registered in
accordance with Calibration of Test/ Inspection Tools Control Procedure. Each certificate shall be
valid for a period of three (3) months. Pressure gauge shall be selected so that the test pressure of the
system falls between 30% and 75% of the gauge scale range. The following in line items will not be
subjected to Field Pressure Testing:-
1) Elements of strainers and filters
2) Pressure relieving devices such as rupture disc, pressure valves etc.
3) Locally mounted pressure gauge.
4) Pressure measuring and regulating items such as flow control valves, turbine meters etc.
5) Equipment like pumps, hose reels etc.
6) Lines directly open to the atmosphere such as vents drains, safety valves, discharge etc. (conformation
1) Elements of strainers and filters
2) Pressure relieving devices such as rupture disc, pressure valves etc.
3) Locally mounted pressure gauge.
4) Pressure measuring and regulating items such as flow control valves, turbine meters etc.
5) Equipment like pumps, hose reels etc.
6) Lines directly open to the atmosphere such as vents drains, safety valves, discharge etc. (conformation
is required from Contractor)
4.0 PNEUMATIC TESTS
4.1 Pneumatic test may be applied for certain lines and test pressure shall be 110% of design pressure as
4.0 PNEUMATIC TESTS
4.1 Pneumatic test may be applied for certain lines and test pressure shall be 110% of design pressure as
specified in each piping Iso drawing and / or pressure test flow diagram as per ANSI / ASME B.31-3
requirement 345.5.4.
4.2 The pressure shall be increased gradually until a gauge pressure which is the lesser of ½ the test
4.2 The pressure shall be increased gradually until a gauge pressure which is the lesser of ½ the test
pressure or 25 psi (170kpa) is attained and held for 10 minutes, at which time a preliminary leak check
shall be made with soap solution on all joint. The pressure shall be increased in steps of 25%, 50%
and 75% of the test pressure. At each step the pressure shall be held for sufficient time to allow the
piping to equalize strains. After holding at test pressure for 10 minutes, the pressure shall be reduced
to the design pressure for leakage examination. Leak testing of joints shall be done with soapy water.
Safety precautions shall be taken by placing a safety relief valve on the system under test.
4.3 The set pressure of the relief valve shall be set at a pressure not higher than the test pressure plus the
4.3 The set pressure of the relief valve shall be set at a pressure not higher than the test pressure plus the
lesser of 50 psi (340kpa) or 10% of the test pressure
5.0 EQUIPMENT FOR HYDROSTATIC TEST
5.1 Equipment for hydrostatic test shall be properly designed and in good working order and shall be
5.0 EQUIPMENT FOR HYDROSTATIC TEST
5.1 Equipment for hydrostatic test shall be properly designed and in good working order and shall be
compatible with the pressure and capacity required during the test.
5.2 The following equipment will be provided in order to conduct the hydrostatic test but not necessarily be
5.2 The following equipment will be provided in order to conduct the hydrostatic test but not necessarily be
limited to the following:-
1) One high volume pump
2) One portable tank to provide a source of pressurizing water
3) One hand pump for pressurizing
4) Pressure gauges and temperature gauges
5) Pressure recorder
6) Safety relief valve (only for pneumatic test)
7) Test manifolds (if required)
6.0 PREPARATION OF TEST PACKAGE
6.1 Prior to commencement the Field Hydrostatic Test the piping test package shall be prepared and
1) One high volume pump
2) One portable tank to provide a source of pressurizing water
3) One hand pump for pressurizing
4) Pressure gauges and temperature gauges
5) Pressure recorder
6) Safety relief valve (only for pneumatic test)
7) Test manifolds (if required)
6.0 PREPARATION OF TEST PACKAGE
6.1 Prior to commencement the Field Hydrostatic Test the piping test package shall be prepared and
submitted to the Client Inspector for review / approval.
6.2 The following documents will be included in the test package:-
1) Piping test package certificate
2) Test block diagrams
3) Signed off punch list
4) Signed off Q.C check sheet
5) Q.C Iso drawing
6) Pressure Gauge calibration Records (calibration certificates)
6.3 When the documents in test package are proper and approved by the Contractor. Line check shall be
6.2 The following documents will be included in the test package:-
1) Piping test package certificate
2) Test block diagrams
3) Signed off punch list
4) Signed off Q.C check sheet
5) Q.C Iso drawing
6) Pressure Gauge calibration Records (calibration certificates)
6.3 When the documents in test package are proper and approved by the Contractor. Line check shall be
made in accordance with approved procedure prior to the test.
6.4 All welds to be pressure tested shall be free of paint, thermal insulation coating and wrapping.
7.0 LIMITATION, EXCEPTIONS AND EXCLUSIONS
7.1 Where the test pressure of piping attached to a vessel is the same as or less then the test pressure for the vessel, the piping may be tested with the vessel at the test pressure of the piping.
7.2 Where the test pressure at the piping exceeds the vessel test pressure and it is not considered
6.4 All welds to be pressure tested shall be free of paint, thermal insulation coating and wrapping.
7.0 LIMITATION, EXCEPTIONS AND EXCLUSIONS
7.1 Where the test pressure of piping attached to a vessel is the same as or less then the test pressure for the vessel, the piping may be tested with the vessel at the test pressure of the piping.
7.2 Where the test pressure at the piping exceeds the vessel test pressure and it is not considered
practicable to isolate the piping from vessels, the piping and the vessels may be tested together at the
test pressure of the vessels, when approved by the owner, and provided the test pressure is not less
77% of the piping test pressure. (ASME B 31.3)(337.4.2)
7.3 The equipment or piping which is not subjected to the test shall be blinded off from the piping to be
7.3 The equipment or piping which is not subjected to the test shall be blinded off from the piping to be
tested.
8.0 FIELD PREPARATION
8.1 When the whole length of system to be tested is completely installed and boundaries are checked by
8.0 FIELD PREPARATION
8.1 When the whole length of system to be tested is completely installed and boundaries are checked by
Subcontractor Q.C
8.2 Test manifold shall be provided in order to supply water to the system, install pressure gauge,
8.2 Test manifold shall be provided in order to supply water to the system, install pressure gauge,
temperature gauge and safety relief valve.
8.3 Pressure gauge shall be provided at two points where one is to be located at highest location in the
8.3 Pressure gauge shall be provided at two points where one is to be located at highest location in the
system and the other at the manifold.
8.4 All test blanks required for pressure test shall have sufficient thickness to ensure safety during test or
8.4 All test blanks required for pressure test shall have sufficient thickness to ensure safety during test or
permanent blinds may be used for the field pressure testing.
8.5 Prior to commencement of the hydrotest, all hot works shall be completed.
9.0 PERFORMANCE OF HYDROSTATIC
9.1 All vents and other connections which can serve as pressure test vents, shall be open during filling so
8.5 Prior to commencement of the hydrotest, all hot works shall be completed.
9.0 PERFORMANCE OF HYDROSTATIC
9.1 All vents and other connections which can serve as pressure test vents, shall be open during filling so
that air can be vented prior to applying test pressure to the system.
9.2 The system shall be filled with fresh water by use of electrical or hand pressurizing pump until the
9.2 The system shall be filled with fresh water by use of electrical or hand pressurizing pump until the
intended pressure, slowly and gradually.
9.3 While the system is being pressured all weld joints will be visually inspected for any leakage.
9.4 Once attained, the intended test pressure shall be held for a period of 30 minutes minimum or such
9.3 While the system is being pressured all weld joints will be visually inspected for any leakage.
9.4 Once attained, the intended test pressure shall be held for a period of 30 minutes minimum or such
time as required for full visual inspection of the system.
9.5 Any joints found leaking during the pressure test shall be retested to the specified test pressure after
9.5 Any joints found leaking during the pressure test shall be retested to the specified test pressure after
repair have been made.
9.6 After hydrostatic testing of the system is completed, all lines and equipment shall be drained
9.6 After hydrostatic testing of the system is completed, all lines and equipment shall be drained
completely. The system shall be vented while draining to avoid vacuum.
9.7 All pressure test must be witness and report to be endorsed by Client rep.
9.7 All pressure test must be witness and report to be endorsed by Client rep.
10 EVALUATION OF TEST RESULTS
10.1 If there is no leakage during the test it will be considered as accepted and test report to be
endorsed by Client.
11 REPORT / DOCUMENTATION
11.1 After pressure test, the pressure test records and the post-test punch items shall be signed off by
11 REPORT / DOCUMENTATION
11.1 After pressure test, the pressure test records and the post-test punch items shall be signed off by
Subcontractor approved by Contractor and endorsed by PPM’s rep. All this documents shall be
compiled into the Test package.
12 REINSTATEMENT
12.1 After completion of hydrostatic test, all the system shall be reinstated as per the approved drawings.
12 REINSTATEMENT
12.1 After completion of hydrostatic test, all the system shall be reinstated as per the approved drawings.
No comments:
ReplyDeleteIs Flushing / cleaning or pipe blowing part of the Test Package? In your procedure, after Hydro test is the REINSTATEMENT, then how can we do Flushing or cleaning of the pipeline system? Shall we again remove the other instrument valves? Please give me advice.
ReplyDeleteWhat if client asks to hydrotest including instrument tubing which is connected through a needle valve 1/2". can we test by only making the valve open or it must be removed from test? thanks
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