ASME – Lessens Learned : Sample of Design Data on GA Drawing Part 1 of 4 - Postweld Heat Treatment Rev.4 APAVE TIV (Thailand) Co., Ltd. Chutchai Phromngam Chutchai.phromngam@apave.co.th Sep 2024 ASME – Lessens Learned : Sample of Design Data on GA Drawing Part 1-Postweld Heat Treatment. Section VIII.1 ASME – Lessens Learned : Sample of Design Data on GA Drawing Part 1 of 4 - Postweld Heat Treatment Rev.4 Case 1 1/3 When, PWHT specified “NO”. “POST WELD HEAT TREATMENT : NO, general notes 7 The minimum information should be describe at “General Notes:” such as… See next page 2/11 ASME – Lessens Learned : Sample of Design Data on GA Drawing Part 1-Postweld Heat Treatment. Case 1 2/3 When, PWHT specified “NO”. The minimum information should be describe at “General Notes:” such as ASME – Lessens Learned : Sample of Design Data on GA Drawing Part 1 of 4 - Postweld Heat Treatment Rev.4 Section VIII.1 1. PWHT exempted as per Table UCS-56-1 General Notes: (b). Sample : [Max. nominal thickness,UW-40(f) applicable paragraphs = 6mm through 25 mm. Vessel mat’l P.No. 1 Gr. 1 and 2 ] General Notes: 7. PWHT exempted as per Table UCS-56-1 General Notes: (b). See next page 3/11 ASME – Lessens Learned : Sample of Design Data on GA Drawing Part 1-Postweld Heat Treatment. Case 1 3/3 Or other case when vessel performed a preheat is applied. The minimum information should be describe at “General Notes:” such as ASME – Lessens Learned : Sample of Design Data on GA Drawing Part 1 of 4 - Postweld Heat Treatment Rev.4 Section VIII.1 “Preheat shall be apply at minimum of 95°C when nominal thickness as per UW-40(f) applicable paragraphs more than 32 mm.” Sample : [Vessel nominal thickness,UW-40(f) applicable paragraphs = 25 mm through 35mm. mat’l P.No. 1 Gr. 1 and 2 ] General Notes: 7. Preheat shall be apply at minimum of 95°C when nominal thickness as per UW-40(f) applicable paragraphs more than 32 mm. 4/11 ASME – Lessens Learned : Sample of Design Data on GA Drawing Part 1-Postweld Heat Treatment. Section VIII.1 ASME – Lessens Learned : Sample of Design Data on GA Drawing Part 1 of 4 - Postweld Heat Treatment Rev.4 Case 2 1/5 When, PWHT specified “Yes”. “POST WELD HEAT TREATMENT : Yes, (see note 9) What information describe at “ Note 9:….?” See next page 5/11 ASME – Lessens Learned : Sample of Design Data on GA Drawing Part 1-Postweld Heat Treatment. Case 2 When, PWHT specified “YES”. Notes: ASME – Lessens Learned : Sample of Design Data on GA Drawing Part 1 of 4 - Postweld Heat Treatment Rev.4 Section VIII.1 2/5 Question maybe have : this PWHT performing including tubesheet? See next page 6/11 Section VIII.1 So, when, PWHT specified “YES”. Case 2 The minimum information should be describe at “General Notes:” such as 3/5 ASME – Lessens Learned : Sample of Design Data on GA Drawing Part 1 of 4 - Postweld Heat Treatment Rev.4 ASME – Lessens Learned : Sample of Design Data on GA Drawing Part 1-Postweld Heat Treatment. 1.Components to be perform PWHT(e.g whole vessel, tube to tubesheet welded joint only, Nozzle N2 to bottom head welded joint only) 2. Maximum heating rate. 3.Minimum holding time at Nominal holding temperature. 4. Maximum cooling rate. Sample : [maximum metal thickness = 90 mm. Tubesheet, nominal thickness,UW-40(f) applicable paragraphs = 2.0 mm tube to tubesheep welded, mat’l P.No. 1 Gr. 1 to P.No.1 Gr.2 ] General Notes: See next page 10. Tube to Tubesheet welded joint with no other components, when performing PWHT above 425°C maximum heating rate is 55°C/h, minimum hold time is 60 minute at nominal holding temperature of 600-620°C, and maximum Cooling rate is 70°C/h. 7/11 ASME – Lessens Learned : Sample of Design Data on GA Drawing Part 1-Postweld Heat Treatment. Case 2 4/5 Or other case when vessel performed as a whole PWHT Sample : [maximum metal thickness = 50 mm. shell and nominal thickness,UW-40(f) applicable paragraph = 50 mm shell to shell welded, mat’l P.No. 1 Gr. 1 to P.No.1 Gr.2 ] ASME – Lessens Learned : Sample of Design Data on GA Drawing Part 1 of 4 - Postweld Heat Treatment Rev.4 Section VIII.1 General Notes: 7. Whole vessel when performing PWHT above 425°C maximum heating rate is 110°C/h, minimum hold time is 120 minute at nominal holding temperature of 600-620°C, and maximum Cooling rate is 135°C/h. See sample next page 8/11 ASME – Lessens Learned : Sample of Design Data on GA Drawing Part 1-Postweld Heat Treatment. Section VIII.1 ASME – Lessens Learned : Sample of Design Data on GA Drawing Part 1 of 4 - Postweld Heat Treatment Rev.4 Case 2 5/5 9/11 ASME – Lessens Learned : Sample of Design Data on GA Drawing Part 1-Postweld Heat Treatment. Section VIII.1 When, PWHT specified for “each component”. ASME – Lessens Learned : Sample of Design Data on GA Drawing Part 1 of 4 - Postweld Heat Treatment Rev.4 Case 3 1/1 “POST WELD HEAT TREATMENT : FLO. HEAD COVER ONLY 10/11 ASME – Lessens Learned : Sample of Design Data on GA Drawing Part 1 of 4 - Postweld Heat Treatment Rev.4 THANKS YOU FOR WATCHING 11/11