Welding Procedures and Quality in Petrochemical Industry

The WPQR certifies that a welder possesses the necessary experience and knowledge to perform the specifications of a particular weld procedure by combining the information of the WPS and adding the test results.

A procedure qualification plate is welded to the code requirements and actual test parameters are recorded at the time of welding to ensure the WPS was being followed.

The tests typically include X-Ray examinations, ultrasonic examinations, tensile testing, bend testing, and when required, impact testing.

<p>MES conducts destructive and non-destructive tests on a weld coupon provided by the welder to determine whether the welder is capable of producing a good weld quality using the welding processes, materials, and prescribed procedures.</p> Signup and view all the answers

<p>A Welder Performance Qualification (WPQ) is a test certificate that shows whether a welder possesses the necessary experience and knowledge to perform the specifications of a particular weld procedure.</p> Signup and view all the answers

<p>Strike the arc, move the electrode to the crown of the crater, then resume forward travel.</p> Signup and view all the answers

<p>Use a quick twist to free it.</p> Signup and view all the answers

<p>The arc goes out.</p> Signup and view all the answers

<p>To free the electrode if it sticks to the workpiece.</p> Signup and view all the answers

<p>To prevent weld cracking.</p> Signup and view all the answers

<p>Weave bead</p> Signup and view all the answers

<p>2 ½ times the diameter of the electrode</p> Signup and view all the answers

<p>Steady movement along seam</p> Signup and view all the answers

<p>Deeper penetration</p> Signup and view all the answers

<p>90 degrees or slightly up</p> Signup and view all the answers