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PROJECT : HARRY ALLEN ACC
CUSTOMER: SPX COOLING TECHNOLOGIES
ITEM: CONDENSATE TANK
POSLILAMA E&C Co.,Ltd. Address: Nhon Trach Industrial Zone Dong Nai Province, Viet Nam Tel No.: 084) 061.3560135 Fax No.: 084) 061.3560851 Home page: http:// www.poslilama. www.poslilama. com
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Name Rev. No.
Date Prepared by
Name
Name
Date
Date
Reviewed by POSLILAMA E&C
Approved by
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INDEX
Par.
Title
Page
1.0
SUBJECT AND SCOPE………………………………………………………. ...
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2.0
PREPARATION FOR TESTING ………………………………………………………..
3
3.0
TEST EQUIPMENT ……………………………………………………………………... 3
4.0
TEST MEDIUM ……………………………………………………………………….....
5.0
TEST TEMPERATURE………………………………………………………………. ... 4
6.0
TEST PROCEDURE …………………………………………………………….. 5
7.0
EXAMINATION FOR LEAKAGE ……………………………………………………...
8.0
REPAIRS, DRAINAGE………………………………………………………………….. 6
9.0
TEST REPORT …………………………………………………………………………..
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10.0
AUTHORIZED INSPECTION …………………………………………………..
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Attachments :
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PRESSURE TEST REPORT
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HYDROSTATIC TEST PROCEDURE
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SUBJECT AND SCOPE This procedure covers hydrostatic tests of boiler, boiler parts, power piping and pressure vessels to meet the requirements of : -
2.0
ASME Section VIII, Div. 1 (last applicable edition and addendum) ASME Section I (last applicable edition and addendum) ASME B 31.1 (last applicable edition and addendum)
PREPARATION FOR TESTING 2.1 Prior to each test, Q.C. Office will prepare a set of instructions for the specific tests. The instructions will outline, as a minimum: - specific items to be tested
- test pressure and holding time -
test temperature
- test position (horizontal or vertical) and method of supporting.
2.2 Tests shall be conducted in accordance with this procedure by the Workshop Foreman or an other person in charged who is responsible for the correct performance of tests, the examination for leakage, acceptance and reporting. 2.3 Instructions may be omitted if information provided by drawing are
complete.
3.0
TEST EQUIPMENT 3.1 Vents shall be provided at the highest points to purge air pockets while the item is filling.
The test equipment shall be examined before pressure is applied to ensure that it is tight and safe.
3.2 A pressure/test gauge shall be connected directly to the top of the item and shall be of the indicator type.
HYDROSTATIC TEST PROCEDURE
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It shall be located in a position where it is visible to the testing equipment operator. 3.3 For boiler and boiler piping, dial indicating pressure gauge shall have a range of about double the intended maximum test pressure and in no case less than 1 1/2. For pressure vessels dial indicating pressure gauge shall have a range from 1.5 to 4 times the intended maximum test pressure.
The spacing between graduation shall be such that the inspector and the operator controlling the test shall be able to determine when the required test pressure has been applied.
3.4 All gauges shall be calibrated against a calibrated master gauge as per the existing POSLILAMA calibration instruction.
4.0
TEST MEDIUM 4.1 Water shall be used as testing medium. In all cases the test medium shall be clean and shall be of such quality as to minimize corrosion.
4.2 Only water with a chloride content of 30 p.p.m. or less shall be used for the test of stainless steel items and of 60 p.p.m. or less for the test of carbon steel items. For any test carried out after the blowing out, the chloride content shall never exceed 30 p.p.m. for any kind of material. 4.3 If a test pressure is to be maintained for a prolonged period of time and if the test medium in the item is subject to thermal expansions, precaution shall be taken to avoid excessive pressure.
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TEST TEMPERATURE 5.1
For Sect. I and B31.1 the water temperature shall not be less than ambient temperature, but in no case less than 70 OF (21.1 °C)
For ASME VIII div. 1 a metal temperature of 30 °F ( 16,6 °C) above the Minimum Design Metal Temperature may be used, but in any case such temperature shall be within 12 °C to 21 °C.
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If the test temperature exceeds 120 °F (48 °C) it is recommended that inspection of the vessel be delayed until the temperature is reduced to 120 °F or less.,
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TEST PROCEDURE 6.1 ASME VIII div. 1 items : The test pressure at every point in the vessel shall be at least equal to 1.3 times the maximum allowable working pressure to be
marked on the vessel multiplied by the lowest ratio (for materials of which the vessel is constructed) of the stress value for the test temperature on the vessel to the stress value for the design temperature. Calculated test pressure per UG 99 (c) may be used when agreed with the user. 6.2 ASME I and B31.1 items :
The test pressure at every point in the boiler shall be at least equal 1.5 times the maximum allowable working pressure to be marked the vessel. The pressure shall be under proper control at all times so that the required test pressure is never exceeded by more than 6%.
6.3 After a unit has been initially operated and repairs or revisions are made to pressure parts, or it is found desiderable to check the unit hydrostatically for possible leaks, it is recommended that the unit be tested to operating pressure.
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EXAMINATION FOR LEAKAGE 7.1 The test shall be made in two stages as follows:
a) The hydrostatic test pressure shall be attained by raising the pressure slowly. Close visual inspection for leakage is not required during this stage. b) Boilers and proper piping
Following the application of the test pressure, the pressure may be reduced to a pressure not less than the maximum allowable working pressure and shall then be held for the time required for the complete inspection, but, in any case, for minimum 1 hour.
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c) Pressure vessels
Following the application of the test pressure, an inspection shall be made of all joints and connections. This inspection shall be made at a pressure not less than the test pressure divided by
1,3. 7.2 Examination for leakage shall be made of all joint and connections
and regions of high stress. The item shall show no visual evidence of weeping or leaking. For reduction in pressure, a valve at the bottom of the vessel should be used.
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REPAIRS, DRAINAGE 8.1 In the event of leakage the item shall be depressurized and drained to the extent necessary to make required repairs after which it will be retested. Areas previously found acceptable need not be re-examined. When the test is acceptable the item shall be completely drained, being careful not to have negative pressure in the item by opening vents. After test and draining the item shall be cleaned as necessary.
8.2 After draining and cleaning a visual examination of internals is required. (Where applicable).
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TEST REPORT 9.1 A report shall be made of each test using the attached form. The test report shall be signed by the Authorized Inspector as required.
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AUTHORIZED INSPECTION The Authorized Inspector shall be notified in advance to witness the
tests.
