Exhibit_E3 Hydrostatic Testing

Wintershall Aktiengesellschaft

Nakhla Phase II - Pipeline Nakhla Jakhira Invitation to Tender Exhibit E3Project Number: L30601 Hydrostatic Testing

Exhibit E3

HYDROSTATIC TESTING

Division E&P / Engineering Department page 11 of 1414

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CONTENTS

SECTION PAGE

1.0 SCOPE 3

2.0 PREPARATION FOR TESTING 3

3.0 MATERIALS AND EQUIPMENT 5

4.0 FLUSHING 5

5.0 PIPING AND EQUIPMENT EXCLUDED FROM TESTING 6

6.0 TEST FLUID 7

7.0 HYDROSTATIC PRESSURE TEST 9

8.0 PNEUMATIC PRESSURE TEST 10

9.0 SYSTEM SERVICE TEST 11

10.0 TEST RECORDS 12

11.0 RETESTING 13

12.0 COMPLETION OF PRESSURE TEST 14





It shall clearly be emphasized, that in case of any deviations or conflicts between the requirements stated in the Technical Specification including appertaining Appendices and this Exhibit E3 the requirements of the Technical Specification (including Appendices) have higher priority and have to be fulfilled by Contractor.

1.0 SCOPE

This specification defines the requirements for flushing, hydrostatic testing, and service

testing of plant piping including equipment skid piping.

As used in this specification, the following definitions shall apply:

Contractor Party responsible for testing pipeline and plant piping systems

Vendor Party responsible for testing skid mounted piping and equipment ; in this

case Contractor and Vendor are the same (identical)

The Contractor or Vendor shall furnish all supervision, labour, equipment, and materials

necessary for the performance of the hydrotesting. The Contractor or Vendor shall obtain

the Company's prior written approval of any deviations from the requirements of this

specification or related contract documents.

The use of this specification does not relieve the Contractor or Vendor of his responsibility

to properly pressure test the plant piping.

2.0 PREPARATION FOR TESTING

2.1 Contractor or Vendor shall be responsible for properly preparing facilities forpressure testing.

Contractor or Vendor shall review all relevant drawings and piping to ensure that adequate

temporary supports, vents, drains, and spades (as necessary to allow testing) are provided

to test the facility in accordance with this specification. Contractor or Vendor shall report to

the Company the findings from this review. Contractor or Vendor shall provide all high

points in the piping with a vent and all low points with a drain, regardless of whether or not

they are specifically shown on the drawings.





Contractor or Vendor shall prepare, for the purpose of the pressure tests, a procedure and

schedule for testing all process and utility piping and pipelines within the limits of his

responsibilities. The procedure and schedule shall be presented to the Company at least

twenty (20) days prior to the scheduled start of pressure tests.

Such procedures should include, but are not limited to, details of the following:

a. Mark-ups of piping and instrument diagrams (P&ID's) showing the

limits of piping and equipment to be included in each test.

b. Test medium to be used.

c. Location of all isolation blinds, high-point verts, low-point drains, and

temporary piping supports.

d. Procedures for flushing lines including fill points and equipment to

be removed for flushing.

e. Procedures for filling lines including addition of oxygen scavenger

and bactericide in proper quantities.

f. Procedures for pressurisation of the system, including the location of the injection

points and specified test pressures.

g. The form which shall be used to record hydrostatic test data.

h. Summary/list of test instruments to be applied

2.2 The testing operations shall be conducted diligently, thoroughly, and in a safe, workmanlike manner in accordance with accepted piping testing practices. Any work by Contractor or Vendor, or existing conditions which in the opinion of Company are deemed to be unacceptable shall be corrected by Contractor or Vendor. The testing operations may not continue until the unsafe conditions have been corrected to the satisfaction of Company. Contractor or Vendor shall not receive additional compensation for time lost due to unacceptable conditions.





If testing is subcontracted, Contractor or Vendor shall furnish an individual who will be

responsible for supervising testing operations. Company will witness and approve all tests

unless waived by the Company in writing.

3.0 MATERIALS AND EQUIPMENT

Contractor or Vendor shall furnish all materials and equipment necessary to pressure test

all piping. This includes, but is not limited to pumps, compressors, valves, filters, plugs,

blinds, caps, strainers, flanges, bolts, gaskets, all piping incidental to the filling, flushing,

transferring, and disposing of the test medium, bactericides, oxygen scavengers, dyes (if

required), and the test medium. Contractor or Vendor shall provide a suitable pressure

relieving device between the pressurising pump discharge nozzle and the fill point,

calibrated to prevent excess pressure in any of the piping and equipment being tested.

4.0 FLUSHING

Prior to commencing any flushing, Contractor or Vendor shall verify with Company that all

required non-destructive testing (NDT) such as radiography, ultra-sonic, etc., has been

completed. Contractor or Vendor shall also verify that all required post-weld heat-treating

has been completed. Furthermore, prior to flushing the insulating couplings shall be

replaced by spool pieces (see Technical Specification, chapter 4.3.4.7) with subsequent

reinstallation of the insulating couplings prior to hydrotesting/water filling. Upon verification

of the above requirements, the Company shall authorise in writing the Contractor or Vendor

to proceed with flushing.

All completed piping systems shall be flushed prior to testing. All lines two (2) inches and

larger, other than instrument and utility air shall be flushed with water so as to completely

clear them of any loose mill scale, rust, or various extraneous material. Suitable pipeline

scrapers shall be applied and have to be procured by Contractor. All lines smaller than two

(2) inches, and air lines of any size, shall be cleaned out in like manner using compressed

air. The flushing medium shall be at as high a velocity as practical (minimum of 5 ft/sec) in

order to flush out any loose material in the line. Flow shall be from high to low points.

Flanges shall be opened and spool pieces shall be removed as necessary to flush the

piping thoroughly.





Flushing shall be performed until a clear stream of flushing medium exits the piping, with a

minimum flush volume being equal to five times the volume of the piping being flushed. All

flushing shall be done in the presence of the Company.

Orifice plates, thermowells, flow straightening vanes, positive displacement (PD) and

turbine meters, corrosion probes, displacement type level instruments, and other

vulnerable equipment, if already installed, shall be removed prior to flushing.

All instrument leads shall be disconnected prior to flushing and shall remain disconnected

during pressure tests. All control valves shall be removed. Spring type supports shall have

stops installed to prevent overloading of the support.

5.0 PIPING AND EQUIPMENT EXCLUDED FROM TESTING

The following piping and equipment shall be excluded or isolated from hydrostatic testing:

a. Rotating machinery, pumps, compressors, etc.

b. Strainers and filters.

c. Pressure-relieving devices such as pressure relief valves and rupture discs.

d. All vessels.

e. All valves, etc. as part of carbon steel piping that are fabricated from duplex.

f. All instruments.

g. Pressure gauges.

h. Expansion joints.

i. Orifice plates.

j. Flow nozzles.

k. Control valves.

l. Corrosion probes/coupons

m. Any other piping or equipment designated by Company.





6.0 TEST FLUID

6.1 Except as otherwise specified, all piping shall be tested with water. The test water shall be clean and free from suspended matter. The test water may be analysed by the Company to determine its suitability for use in the testing operations. Suspended matter in the fill water shall be removed before injection into the piping by a filter, capable of removing 99 percent of all particles 92 microns in diameter and larger, or equivalent to using a 100 x 100 wire-mesh screen. If foreign material is pumped into the piping because of faulty equipment or careless workmanship, Contractor shall again flush the line with clean water. For austenitic steels only water with a chloride content of max. 30 ppm shall be used for hydrostatic testing.

When air is specified as the testing medium, the air shall have a dew point of at least -

20°F.

6.2 Conditions requiring the use of oxygen scavenger, bacteria control and corrosion inhibitor depend on how long the test media will remain in the system . If dosing is demanded by

Company, Contractor has to purchase all inhibitors including the dosing equipment

(pumps, storage tank, connecting piping,…)

Oxygen removal and bacteria control shall be performed at the following treatment rates:

Oxygen Scavenger - 100 ppm

Tretolite Kontol K-490, Visco 3656 or equal

6.3 Water used to test piping or vessels fabricated from or containing parts of austenitic stainless steel, ferritic stainless or high nickel alloy shall be free from undissolved

solids and have a max. chloride content of 30 ppm.

6.4 Instrument air lines and utility air lines shall be tested with compressed air.





7.0 HYDROSTATIC PRESSURE TEST

7.1 Hydrostatic pressure testing on the total piping system shall be in accordance with

ANSI/ASME B31.3, (latest edition) as a higher demand than ANSI B31.8. Piping test

pressures are a minimum of 1.5 times design pressures. Prior to commencing any

pressure test, Contractor or Vendor shall verify with Company that all required non-

destructive testing (NDT) such as radiography, ultrasonic, etc., has been completed.

Contractor or Vendor shall also verify that all required post-weld heat treating has been

completed and the spool pieces have been replaced by the insulating couplings. Upon

verification of the above requirements, the Company shall authorise the Contractor or

Vendor to proceed with pressure testing.

7.2 Contractor or Vendor shall hydrostatically test piping, vessels and equipment for which he

has fabrication or assembly responsibility. Hydrostatic testing may be performed for

completed systems so for individual components of the system, as approved by the

Company. However, if individual components are hydrostatically tested, the Contractor or

Vendor shall flush the completed assembly prior to the system service test. Should

Contractor or Vendor desire to hydrostatically test through Company furnished equipment,

he may do so with written approval of Company. When hydrostatically testing through

Company furnished equipment, Contractor or Vendor shall exercise due caution to protect

any instrumentation associated with the Company furnished equipment.

Vents shall be open during water filling so that air is vented prior to applying pressure to

the system.

7.3 Testing shall not be done against closed valves. If it is impractical to test through a valve, that valve shall be isolated by blinds or disconnected from the piping

system. The pressure for each section tested shall be contained by suitably placed

spectacle blinds, spades, skillets, blank insert clokes, blind flanges or other means of

positive closure. Contractor or Vendor shall supply calculations to Company verifying the

thickness of blinds to be used for isolation during hydrostatic tests. Test pressure

connections shall be on the upstream side of check valves. Thermowells shall be included

in hydrostatic tests, if fabricated from carbon steel (duplex thermowells are excluded).





Pressure tests will be recorded on a pressure recorder (Foxboro 24-hour chart type or

equal) with a range suitable for recording the test pressure. The pipeline pressure during

the test shall be measured by means of a verified dead weight tester. All calibrated gauges

or dead weight testers shall have current calibration record and/or calibration certificate. All

hydrostatic tests shall be a minimum of four (4) hours duration. Readings shall be taken

from the test gauge at fifteen minute intervals during the test and recorded on form

provided by Contractor or Vendor.

During the pressure test, the test medium may be subject to thermal expansion. Contractor

or Vendor shall take proper precautions to avoid excessive pressures; (i.e. pressure bleed

back to test pressure shall be witnessed by Company and noted on test record ;

corresponding amount of bleeded water to be determined).

7.4 For unburied pipe sections all joints, including welds, are to be left uninsulated and

exposed during the test. Only tests with ending pressures equal to or above starting

pressure will be accepted. Contractor or Vendor should schedule tests for that portion of

the day when thermal contraction will not result in ending pressures lower than starting

pressure.

Pressure tests on each major section of piping shall be carried out with all pressure relief

valves removed and their respective nozzles or connections blinded off or plugged. The

pressure relief valves will themselves be tested to their respective set point pressures, by

Contractor or Vendor, in a separate test. Tests of pressure relief valves are to be witnessed

and approved by the Company respectively Companies representative (TUV, GL). Upon

completion of piping or vessel hydrostatic test, pressure relief valves shall be reinstalled in

each system.

7.5 Reinforcing pads shall the air tested to 350 kPa gauge (50 psig) prior to postweld heat

treatment and/or hydrostatic test. All outside welds and inside welds, where possible, shall

be inspected during the test. Test holes shall be open during hydrostatic test and plugged

with a ¼” NPT plug after the hydrostatic test.





8.0 PNEUMATIC PRESSURE TEST

8.1 Pneumatic pressure testing of piping system shall be in accordance with ANSI/ASME

B31.3 (latest edition). Piping test pressure is a minimum of 1.10 times design pressure.

Piping test pressures are given on the Piping Material Specification sheets in General

Specification E2, "Piping."

8 .2 Contractor or Vendor shall pneumatically test piping and equipment for which he has

fabrication or assembly responsibility. Pneumatic testing may be performed for completed

systems or for individual components of the system, as approved by the Company.

However, if individual components are pneumatically tested, Contractor or Vendor shall

flush the completed assembly prior to the system service test. Should Contractor or Vendor

desire to pneumatically test through Company furnished equipment, he may do so with

written approval of Company. When pneumatically testing through Company furnished

equipment, Contractor or Vendor shall exercise due caution to protect any instrumentation

associated with the Company furnished equipment.

8.3 Testing shall not be done against closed valves. If it is impractical to test through a valve,

that valve shall be isolated by blinds or disconnected from the piping system. The pressure

for each section tested shall be contained by suitably placed spectacle blinds, spades,

skillets, blank insert chokes, blind flanges or other means of positive closure. Contractor or

Vendor shall supply calculations to Company verifying the thickness of blinds to be used

for isolation during pneumatic tests. Test pressure connections shall be on the upstream

side of check valves. Thermowells shall be included in pneumatic tests.

The testing duration, testing equipment and recording instruments, test gauge reading

interval, documentation and records shall be subject to the written approval of the

Company.

During pressure test, the test medium may be subject to thermal expansion. Contractor or

Vendor shall take proper precautions no avoid excessive pressures; (i.e. pressure bleed

back to test pressure shall be witnessed by Company and noted on test record).





8.4 For unburied pipes all joints, including welds, are to be left uninsulated and exposed during

the test. Contractor or Vendor should schedule tests for that portion of the day when

thermal contraction will not result in ending pressures lower than starting pressure.

Pressure tests on each major section of piping shall be carried out with all pressure relief

valves removed and their respective nozzles or connections blinded off or plugged . The

pressure relief valves will themselves be tested to their respective set point pressures, by

the Contractor or Vendor, in a separate test. Tests of pressure relief valves are to be

witnessed and approved by the Company respectively Companies representative (TUV,

GL) . Upon completion of piping pneumatic test, pressure relief valves shall be reinstalled

in each system.

9.0 SYSTEM SERVICE TEST

9.1 The System Service Test is a test to prove the integrity of completed, fully assembled

piping systems including all vessels and any Company furnished item in the system. The

test shall be designed to demonstrate that systems, upon completion of assembly, are

capable of operation at pressures specified.

After completion of all recorded hydrostatic pressure tests of completed systems, or final

assembly of individually, hydrostatically tested components, each piping system shall be

given a service test at the system design pressure. Contractor shall service test all

completed plant piping systems, including equipment which may have been previously

service tested as a unit by individual Vendors. All valves, control valves, filters, strainers,

turbine meters, PD meters, flow nozzles, level gauges, level switches, level controls,

rupture disks, pressure relief valves, and pressure gauges shall be installed for the test. All

other instruments and any rotating equipment such as pumps and compressors are

excluded from the tests.

During the service test, the isolation valves for relief valves shall be closed and relief valves

removed. After the service test of that portion of the system containing the isolation valves

and prior to depressuring the test water, the relief valve shall be installed. The test

pressure shall be lowered to ninety percent (90 %) of the relief valve set point pressure and

the block valve opened. The purpose of this procedure is to check the connection between

the block valve and relief valve.

All temporary positive closures such as plugs, blinds, spectacles, spades, and skillets

which may have been used during hydrostatic testing, shall be removed and all piping





joints shall be made up as they would be during normal operation of functional systems.

Any used gaskets from prior tests shall be replaced.

9.2 In general the test medium and filling and venting procedures shall be the same as for

hydrostatic tests. Pressure shall be brought to system design pressure and held for thirty

(30) minutes. All connections which were not made prior to hydrostatic tests shall be

checked for leaks and tightened as necessary. Following the initial thirty (30) minute

portion of service test, each valve in the system shall be tested by being closed and used

to hold the test pressure for a period of time necessary to determine whether each valve is

in turn positively shutting off and holding pressure. Packing shall be replaced in equipment,

such as valves, when leaks cannot be stopped by normal tightening of packing glands.

When Contractor is testing systems on completed plants, only one complete system at a

time shall be tested to prevent overstressing of plant structural members. During testing,

Contractor shall take suitable precautions to prevent building up excessive pressures in

adjacent equipment not included in the test, such as opening vent valves in the adjacent

systems, etc.

10.0 TEST RECORDS

Contractor shall furnish all testing equipment and recording instruments with all necessary

supplies and shall maintain accurate and permanent records. The testing and recording

equipment shall be subject to the written approval of the Company.

All reports, records, data and charts clearly marked with the following information shall be

furnished to the Company:

a. Company name and authorised representative.

b. Testing Contractor's name and authorised representative.

c. Line identification of piping and/or equipment tested.

d. Date, start time and stop time of test.

e. Test pressure and duration.

f. Test medium used.

g. Ambient air temperature.

h. The recorder element range.

i. Explanation of any pressure discontinuities that may appear on the chart.

j. Listing of items excluded from the test.

k. Service test record.





l. Marked-up P&ID's depicting valves which passed and failed service test.

m. Signature of Company's and testing Contractor's authorised representative.

11.0 RETESTING

Should piping failure occur during testing, Contractor or Vendor shall locate the failure.

Contractor or Vendor shall at his expense repair all defects resulting from inferior

workmanship or defective materials furnished by the Contractor or Vendor. After repairs

have been made, the Contractor or Vendor shall retest until a successful test is obtained to

the satisfaction of the Company.





12.0 COMPLETION OF PRESSURE TESTS

Upon completion of hydrostatic tests and service tests, the Contractor or Vendor shall:

a. Dispose of all test medium to a location designated by the Company, exercising

proper caution to avoid accidental creation of a vacuum during draining of water

from equipment.

b. Restore any equipment excluded from tests to a fully operational condition.

c. Remove all temporary facilities installed by the Contractor or Vendor including

temporary supports and bracing.

d. Remove any temporary plugs or blinds.

e. Replace any used gaskets or damaged nuts and bolts.

f. Air purge all piping and equipment, unless specifically deleted by Company in

writing, to remove low-point pockets of water. Air purging shall be performed in

the presence of the Company and last a minimum of thirty (30) minutes.

Afterwards drying of the pipeline by means of a methanol batch is Afterwards drying of the pipeline by means of a methanol batch is

requiredrequired”. ”.

g. Remove all stops placed in spring type supports.

h. Remove/dismantle all material and equipment which temporarily has been

installed for hydrotesting, e.g. but not limited o filling lines, drain lines, filling and

drain pumps, mobile tanks,…



Exhibit_E3 Hydrostatic Testing

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