Search results with tag "Postweld"
General Welding Guidelines - MCAA
www.mcaa.orgPostweld Heat Treatment. The required postweld heat treatment temperature range indicated on the engineering drawing shall govern when using a Welding Procedure Specification, which permits the weld to be made either with or without heat treatment. Postweld heat treatment holding time and heating and
Stainless Steel AL 17-4™ Precipitation
www.specialtysteelsupply.comPostweld heat treating is needed to produce the vari-ous precipitation hardened heat treatment properties. If matching filler material is used, properties comparable to those of the parent metal can be produced in the weld by postweld precipitation hardening heat treatment. When a number of welding passes are made, a sub-
Recommended Practices for Local Postweld Heat Treatment
parstechnic.comRecommended practices are available for pressure vessels(l) and piping (2) which provide in-depth treatment of the various issues relating to local heating. These recommended practices also address bake-out, preheat/inter pass heating and post heating in addition to PWHT. The
API 510 (2006): Pressure Vessel Inspection Code: In ...
www.mactechonsite.comcircumstances, local, state, and federal laws and regulations should be reviewed. ... ing and operating practices. These publications are not intended to obviate the need for ... 8-1 Welding Methods as Alternatives to Postweld Heat Treatment Qualification
KOBELCO WELDING CONSUMABLES
www.kobelco.co.jpThe mechanical properties of weld metals can be affected by preheat and interpass temperatures and welding heat input. Therefore, these parameters must be controlled during welding to assure the weld quality. 5. For details of individual brands, refer to KOBELCO WELDING HANDBOOK. ... glossy bead appearance reduce postweld cleaning time ...
WELDING PROCEDURE SPECIFICATION (WPS) Yes …
pubs.aws.orgPREHEAT POSTWELD HEAT TREATMENT Preheat Temp., Min. _____ Temp. _____ Interpass Temp., Min. _____ Max. _____ Time_____ Pass or Weld Layer(s) Process Filler Metals Current Volts Travel Class Diam. Speed Joint Details Type & Polarity Amps or Wire Feed Speed 1-n SAW EM12K 5/32" DC+ 45 ipm 550 Amps ±10% 28 V ±7% 16 ipm ±15% ...
PROCEDURE QUALIFICATION RECORD (PQR) Sheet 1 of 4
www.wpsamerica.comPOSTWELD HEAT TREATMENT TABLE: ASME Section VIII-Division 1: Requirements for PWHT of Table UCS-56 Min. Holding Temperature: 1,100 °F (595 °C) Min. Holding Time for Weld Thickness (Nominal): Up to 2 in. (50 mm): 1 hr/in. (2 min/mm), 15 min Min. Over 2 in. (50 mm): 2 hr plus 15 min for each additional inch over 2 in. (50 mm)
WPSAmerica.com <<Preheat Guides for ASME …
www.wpsamerica.comWPSAmerica.com <<Postweld Heat Treatment Guides for ASME B31.3 Code>> ASME B31.3 Process Piping Code: Clause 331.1.3 Definition of Thicknesses Governing PWHT:
Key Concepts in Welding Engineering - Foundation
www.jflf.orgWelding Innovation Vol. XV, No. 2, 1998 What is PWHT? Postweld heat treatment (PWHT), defined as any heat treatment after welding, is often used to improve the
Welding Procedure Specification (WPS) Sheet 1 of 3
www.wpsamerica.comPOSTWELD HEAT TREATMENT (QW-407) Holding Temperature Range °C (°F): 680 °C + or - 10 °C Holding Time Range: 1 hr/ in. (15 minutes Min.) Heating Rate °C/hr (°F/hr): 120 °C/hr Method: Furnace Cooling Rate °C/hr (°F/hr): 120 °C/hr Method: Open Air