1、WPEC DOC. NO. QCHP-01 REV. NO.： 0 Page 1 of 3HEAT TREATMENT PROCEDURE43210REV. NO. PREPARED BY REVIEWED BY APPROVED BY ACCEPTED BYWPEC DOC. NO. QCHP-01 REV. NO.： 0 Page 2 of 3HEAT TREATMENT PROCEDURE1. GeneralThis procedure is applicable for Code items fabricated in accordance with the ASME Code Sec
2、tion Division 1.2. PersonnelThe person who performs heat treatment job shall be familiar with general requirements of heat treatment and characteristics of material, and has been properly trained.3. Heat Treatment Equipment3.1 Temperature measurement, control meters and the thermocouples shall be in
3、 the effective calibration period.4. Operation4.1 The holding time shall be accumulated from the point in which the surface of workpiece has achieved the holding temperature. In case of hot charges, the holding time shall be added 15-30 min.4.2 For workpieces cooling in still air, they shall be sepa
4、rately laid out when cooling.4.3 For workpieces quenching in water or oil, they shall be swung in the cooling medium for getting a perfect cooling rate. 5. Examination5.1 The Examiner shall collect the Heat Treatment Record and the Time Temperature Chart.WPEC DOC. NO. QCHP-01 REV. NO.： 0 Page 3 of 35.2 The Examination Engineer shall review all records related to the heat treatment to verify that conditions of heat treatments meet the requirements of the procedure, the Customers specification, applicable WPS and the Code.
