swi_procedure_post weld heat treatment for astm a105 steel
DESCRIPTION
HEAT TREATMENTTRANSCRIPT
www.swivalve.comCopyright © 2008 SWI Valve Co., Ltd. All rights reserved.
Post WeldHeat Treatment
PROCEDURE MANUAL
ISO 9001 : 2000 EDITION
HEAT TREATMENT PROCEDURE HEAT TREATMENT PROCEDURE
ISSUE JUN 13, 2003
REVISION DEC 20, 2003
REV. NO. A
PERFORM DEC 20, 2003
DOC. NO. SW-HTP-01
PREPARED BY T. M. LEE
REVIEWED & APPROVED BY
Y. P. CHO
SWI Valve Co.,Ltd.
HEAD OFFICE & PLANT 1023-2, Kwanyang-dong, Anyang, Kyungki-do, Korea Tel : 82-31-422-7495 – 7 Fax : 82-31-422-7498 Home page : www.swivalve.com
QUALITY ASSURANCE DOC NO. SW-HTP-01
HEAT TREATMENT PROCEDURE PAGE 1 ╱ 3
1.0 SCOPE
1.1 This procedure defines the heat treatment required by the material specification and
postweld heat treatment(PWHT) of pressure rating parts of the valve of SWI Valve
Co.,Ltd.(SWI)
1.2 This procedure shall be applied to the manufacturing process.
2.0 APPLICABLE SPECIFICATIONS STANDARDS & CODES
2.1 ASME B31.3 "CHEMICAL PLANT AND PETROLEUM REFINERY PIPING"
2.2 Applicable material Specification. (ASTM)
3.0 HEAT TREATMENT & POSTWELDED HEAT TREATMENT(PWHT) PROCEDURE
3.1 Preparation
1) The forging & Cast steel shall be free of the scales, oil, grease, rust and
other foreign adherents.
2) Loading
3.2 Heating
After loading, temperature and time shall be prepared in according to the rules.
3.3 Holding
3.4 Cooling
4.0 INSPECTION
The inspection after heat treatment and PWHT shall be performed on below test.
1) Visual
2) Heating Rate
3) Holding Time
4) Cooling Rate
5) Hardness Test
QUALITY ASSURANCE DOC NO. SW-HTP-01
HEAT TREATMENT PROCEDURE PAGE 2 ╱ 3
5.0 GENERAL SKETCH OF HEAT TREATMENT CURVE
FORGING STEEL HEAT TREATMRNT TEMPERATURE STANDARD
Method Material NORMALIZING STRESS RELIEVING / PWHT
ASTM A105 A350-LF2
Temp. 880±25℃
Air Max. Cooling 150℃/Hr 300℃ Holding Time : 1 Hr/in
Temp. 650±25℃
Max. Max. 100℃/Hr 150℃/Hr 300℃
Holding Time : 1 Hr/inch
Method Material NORMALIZING TEMPERING / P.W.H.T
ASTM A182-F5 A182-F9
Temp. 980±25℃
Air Max. Cooling 150℃/Hr 300℃ Holding Time : 1 Hr/inch
Temp. 730±25℃
Max. Max. 100℃/Hr 150℃/Hr 300℃
Holding Time : 1 Hr/in P.W.H.T Holding Time : 2 Hr
Method Material NORMALIZING TEMPERING / P.W.H.T
ASTM A182-F11 A182-F22
Temp. 930±25℃
Air Max. Cooling 150℃/Hr 300℃ Holding Time : 1 Hr/inch
Temp. 730±25℃
Max. Max. 100℃/Hr 150℃/Hr 300℃
Holding Time : 1 Hr/in P.W.H.T Holding Time : 2 Hr
QUALITY ASSURANCE DOC NO. SW-HTP-01
HEAT TREATMENT PROCEDURE PAGE 3 ╱ 3
FORGING STEEL HEAT TREATMRNT TEMPERATURE STANDARD
Method Material SOLUTION STRESS RELIEVING / PWHT
ASTM A182-F304 A182-F304L A182-F316 A182-F316L A182-F347 A351-CF3 A351-CF3M A351-CF8 A351-CF8C A351-CF8M
Temp. Min. 1040 ℃
Water Max. Cooling 150℃/Hr 300℃ Holding Time : 1 Hr/inch
Temp. Min. 1040 ℃
Water Max. Cooling 150℃/Hr 300℃ Holding Time : 1 Hr/inch
Method Material
NORMALIZING STRESS RELIEVING
ASTM A216-WCB A352-LCB
Temp. 910±25℃
Air Max. Cooling 150℃/Hr 300℃ Holding Time : 1 Hr/in
Temp. 650±25℃
Max. Max. 100℃/Hr 150℃/Hr 300℃
Holding Time : 1 Hr/inch
Method Material
NORMALIZING TEMPERING/STRESS RELIEVING
ASTM A217-C5 A217-C12 A217-WC6 A217-WC9
Temp. 950±25℃
Air Max. Cooling 150℃/Hr 300℃ Holding Time : 1 Hr/inch
Temp. 730±25℃
Max. Max. 100℃/Hr 150℃/Hr 300℃
Holding Time : 1 Hr/in