Welding Engineer Tips.

ASME AUTHORITYTesting & Fabrication Tips ASME VIII DIV.1

Welded Joint Category: First of all welding engineer shall pre-describe the welded joint category to ensure proper identification for Joint Efficiency which is a part of joint configuration, Position, Thickness. As these parameters lately used as prescribed the tables shown below for Determination of % of Radiographic test requirements and / or Hydro static test requirements as per material specification.

Joint Efficiency:

As shown table after determination of the joint category it will be easy to determine the joint eff. Which used lately.

Prepared By: Mohammed Abdulfattah


Heat Treatment Operation: A care must be taken for heat treatment process as per Div.1 requirements for determining the Heat treatment requirements and /or exemption the following should be taken into considerations: Holding temp., Material THK., Material Specification and hydro-static test interference finally the MAWP Limitation.



If deviations at soaking temp. occurred during general processing from recommended min. temp requirements shown below table shall be used for Gr.1,2,3 P1. For ensuring min. stress relief requirement.



General Testing Requirements and fabrication hints:

UT RT Interference

Welder I.D & Traceability

Finalizing Circumferential / Longitudinal welds



Weld Metal Build Up



RT & UT Exemption

Welding Butt joints of Unequal Thickness within transition ration 1:3



Welding For Unequal Thickness:



Inspection During Fabrication:



NON DESTRUCTIVE EXAMINATION ACCEPTANCE CRITERIA

PENETRANT TESTING




MAGNETIC TESTING




ULTRASONIC TESTING

Amp

20%




RADIOGRAPHIC TESTING

FOR INDICATION THK LESS THAN 25 MM


Welding Engineer Tips.

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