Results 191 to 200 of about 1,433 (216)
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PWHT Exemptions for Carbon Steel in B31.3: An EPC Contractor’s Perspective
Volume 6: Materials and Fabrication, 2020Abstract In the 2014 edition of the ASME B31.3 Code [1], thick, P-No. 1 carbon steel pipe became exempt from Postweld Heat Treatment (PWHT) under the condition of preheating at 95°C (200°F) and multi-pass welding. The decision whether to apply PWHT or not is left to the designer but no further guideline is provided.
Jan-Willem Rensman, George Kraayeveld
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Effect of PWHT on the Hardness and fractured microstructure of IS-103Cr1 welded joint
Materials Today: Proceedings, 2017Abstract During the welding process change of chemical and physical properties takes place due to uneven heating and cooling for improving regaining their properties heat treatment processes is one of the best methods. In the similar or dissimilar welded joints, at the welded portion it can be exist in more than one crystalline form and the carbon ...
M. Bala Chennaiah +2 more
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PWHT Tougness Degradation of Micro-Alloyed a-420 Fittings
CORROSION 2000, 2000Abstract Mechanical properties of recently supplied ASTM A-420 WPL6 yr. 1996 (rev. a) fittings are discussed. Impact test results showing the detrimental effects of post weld heat treatment (PWHT) on the base material and weld heat affected zone toughness of quenched and tempered vanadium micro-alloyed fittings are presented.
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Review and Recommendations on PWHT Exemptions for 2014 Edition of ASME B31.3
CORROSION 2020, 2020Abstract A major significant change in fabrication/ welding of process piping was brought out by ASME B31.3 2014 addition Table 331.1.3 “Exemptions to Mandatory Postweld Heat Treatment” It now allowed for all carbon steel conforming to P- No1material group for all control Thickness and All weld type with exemption from Postweld heat ...
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Volumetric Examination After PWHT on a Carbon Steel Pressure Vessel
Volume 5: High-Pressure Technology; ASME NDE Division; 22nd Scavuzzo Student Paper Symposium and Competition, 2014Carbon steel pressure vessels may require post weld heat treatment (PWHT) for stress relief in accordance with global pressure vessel safety codes. When stress relieved, most of these vessels receive a full volumetric exam, such as radiography or ultrasound.
James W. Becker, Matthew L. Schulte
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Ethanol SCC Research on PWHT Effects and Threshold Stress Determination
CORROSION 2011, 2011Abstract Recently a laboratory testing program was completed that covers an important and yet unexplored area of ethanol stress corrosion cracking (eSCC) of steel equipment in ethanol distribution and blending facilities. This program aimed at generating new data on the effects of post weld heat treatment (PWHT) on eSCC and also ...
Anand Venkatesh +3 more
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Effect of PWHT on the Mechanical Properties of P5 Steel Welded Joints
Solid State Phenomena, 2010Presented work analyses the impact of heat treatment parameters on the mechanical properties and operational reliability of P5 (5%Cr0.5%Mo) steel welded joints. The key objects of research are heat-treated chrome-molybdenum steel welded joints and piping elements operated at high temperature for an extensive period of time, where degradation of ...
Vigantas Kumšlytis +2 more
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Influence of PWHT on FSW joint of AZ61 Mg alloy
Materials Today: Proceedings, 2022Kulwant Singh +3 more
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Welding in the World, 2014
The effect of post-weld heat treatment (PWHT) time and multiple PWHT on mechanical properties of modified 9Cr-1Mo steel weld joints has been studied using multi-pass tungsten inert gas (TIG) weld joints fabricated from 12.5-mm-thick plates using matching composition ER90S-B9 filler wire.
H. C. Dey +5 more
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The effect of post-weld heat treatment (PWHT) time and multiple PWHT on mechanical properties of modified 9Cr-1Mo steel weld joints has been studied using multi-pass tungsten inert gas (TIG) weld joints fabricated from 12.5-mm-thick plates using matching composition ER90S-B9 filler wire.
H. C. Dey +5 more
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Buckling Assessment of Carbon Steel Pressure Vessels During PWHT
Volume 3A: Design and Analysis, 2018Post weld heat treatment (PWHT) is often applied to welded pressure vessels and piping to increase the mechanical and metallurgical properties. During the PWHT, a pressure component made of a carbon steel to which PWHT is applied, is heated up to the temperature around 620 deg.C with +/− 25 deg.C tolerances and that elevated temperature is kept for 1 ...
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