Heat Exchanger Hydrotest
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Dokumentnamn/Dokument name Hydro test procedure Reg. Nr./Reg. No. GEN-C 0026 Utfrdare/!ssued "y Godknd/#ppro$ed "y Utg%$a/!ssue Conny &o'ansson ()*rn H+,,efors u",+serad/ u",+s'ed Godknt datum/#ppro$a, date +da/ age 200 -02-06 200 -02-06 1 23 H4DR5 E R5CEDURE 1. cope '+s procedure descr+"es pressure test+ng of p,ate 'eat e7c'angers 8+t' 8ater or order re,ated add+t+ona, re9u+rements to t'+s procedure 8+,, "e co$ered "y an addend 2. rocedure tep 1 : ;ount test <anges on s+de 1. !n,et and out,et ,ocat+ons are 8r+tten +n t'e 8or : C'eck t'at t'e manometer +s ca,+"rated 8+t'+n t'e ,ast = mont's. : >+,, t'e 'eat e7c'anger 8+t' fres' 8ater ,ess t'an =0 ppm c',or+de content3 8 temperature of m+n 10?C. : C,ose t'e a+r $ent+ng $a,$e 8'en a,, t'e a+r +s e$acuated. : Ra+se t'e pressure to correct test pressure accord+ng to t'e 8ork order and/or arrangement dra8+ng and c,ose t'e $a,$e. : During the time that the heat exchanger is under pressure, it is to be inspected for leaka 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. : !f t'ere +s ,eakage due to 'o,es +n p,ates@ t'e pos+t+on on t'e defect+$e p,at determ+ned +n t'e fo,,o8+ng mannerA o 'e d+stance +ns+de t'e port from t'e co$er to t'e ,eakage +s measured. o 'e same d+mens+on to "e measured on t'e outs+de of t'e p,ate pack. o 'e pos+t+on +s marked 8+t' a c,+p. o Remo$e B-6 p,ates around t'e ,eakage. o 'ese p,ates are e7am+ned us+ng penetrant test. : 'e fo,,o8+ng measures are to "e taken +n case of ,eakageA eakage "ecause of Correct+$e measure
description
Hydrotest
Transcript of Heat Exchanger Hydrotest
Dokumentnamn/Dokument name Hydro test procedure Reg. Nr./Reg. No. GEN-C 0026 Utfrdare/Issued by Godknd/Approved by Utgva/Issue Conny Johansson Bjrn Hillefors 9 Publiserad/Published Godknt 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 order related additional requirements to this procedure will be covered by an addendum. 2. Procedure Step 1 Mount test flanges on side 1. Inlet and outlet locations are written in 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 10C. 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 leakage,inwards and outwards. Check the manometer to see that there is no pressure drop belowthe 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 it is leak free.
Step 2Perform pressure test on the second side as per above stated procedure.
Step 3 Drain the unit after successful pressure test. Sign the final inspection report that the unit is successfully pressure 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 side30 minutes on second side 240 minutes (4 hours) double sided4. Pressure gauge range Pressure tests between Use gauge 0-20 bar 0-25 bar 10-35 bar 0-40 bar 30-55 bar 0-60 bar
