Hydro Test Procedure for Heat Exchanger

Utfärdare/Issued Utfärdare/Issued by

Dokumentnamn/Dokument name

Reg. Nr./Reg. No

Hydro test procedure

GEN-C 00

Godkänd/Approved Godkänd/Approved by

Utgåva/Issue

Conny Johansson

Björn Hillefors

9

Publiserad /Published

Godkänt datum/Approval date

Sida/Page

2007-02-06

2007-02-06

1 (2)

HYDRO TEST PROCEDURE 1. Scope

This procedure describes pressure testing of plate heat exchangers with water. Project or ord related additional requirements to this procedure will be covered by an addendum. 2. Procedure

Step 1 • • •

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Mount test flanges on side 1. Inlet and outlet locations are written i n the work order. Check that the manometer is calibrated within the last 3 months. Fill the heat exchanger with fresh water (less than 30 ppm chloride content) with a temperature of min 10ºC. Close the air venting valve when all the air is evacuated. Raise the pressure to correct test pressure according to the work order and/or general arrangement drawing and close the valve. During the time that the heat exchanger is under pressure, it is to be inspected for leakag inwards and outwards. Check the manometer to see that there is no pressure drop below the stated test pressure. No leakage or residual deformation is permissible. If there is leakage due to holes in plates, the position on the defective plates are determined in the following manner: o The distance inside the port from the cover to the leakage is measured. o The same dimension to be measured on the outside of the plate pack. o The position is marked with a clip. o Remove 4-6 plates around the leakage. o These plates are examined using penetrant test. The following measures are to be taken in case of leakage: Leakage because of Corrective measure Defective plate Change the plate Bad adhesion Re-glue the gaskets Defective gasket Change the gasket After carrying out the corrective measures, pressure test the heat exchanger again until is leak free.

Utfärdare/Issued Utfärdare/Issued by

Dokumentnamn/Dokument name

Reg. Nr./Reg. No

Hydro test procedure

GEN-C 00

Godkänd/Approved Godkänd/Approved by

Utgåva/Issue

Conny Johansson

Björn Hillefors

9

Publiserad /Published

Godkänt datum/Approval date

Sida/Page

2007-02-06

2007-02-06

2 (2)

Step 3 • •

Drain the unit after successful pressure test. Sign the final inspection report that the unit is successfully pressure tested. tested.

3. Time schedule for pressure tests

A. PED 97/23/EC with CE-mark. PHE shall be pressure tested 30 minutes on each side. B. PED 97/23/EC acc. to SEP. PHE shall be pressure tested 15 minutes on each side. C. ASME VIII, Div 1. PHE shall be pressure tested 30 minutes on each side. D. Double wall (GD) exchangers 30 minutes on first side 30 minutes on second side 240 minutes (4 hours) double sided • • •

4. Pressure gauge range

Pressure tests between 0-20 bar 10-35 bar 30-55 bar

Use gauge 0-25 bar 0-40 bar 0-60 bar