A little problem with welding
Thread Content
Common welding abbreviations WPS and PQR. We know that WPS is the welding procedure guide and PQR is the welding procedure qualification. The question is, what is the abbreviation of the welding procedure specification? What is the difference between welding procedure specifications, welding procedure instructions and welding procedure qualification? Please help someone in the forum who knows about welding explain it. Thank you.
To answer the original poster, I personally believe that WPS is the abbreviation of Welding Procedure Specification, which is the welding procedure specification and some people call it the welding procedure instruction book. The welding process card is the abbreviation of Welding work instruction. It is a refinement of the welding process specification. It is the basis for directly guiding the welding construction and is equivalent to the construction drawing. The welding procedure specification is the guiding document of the welding procedure card. The welding process qualification PQR is made by subjecting representative materials to mechanical testing (tensile, bending, etc.), flaw detection, etc. After passing the evaluation, theoretical guidance will be given to the formulation of the WPS according to the qualified parameters and methods (such as welding method, groove form, current, voltage, speed, etc.). To put it simply, when doing WPS, you must have PQR as a basis. The relationship between the three is that PQR guides WPS, and WPS guides welding process card. Experts welcome corrections! ! This post was last edited by iamsunyue on 2007-12-14 22:26 ]
~~Got it, WPS, welding procedure specification, can also be called welding procedure guide. WPS must need PQR to provide theoretical support.
Welding procedure specifications refer to the rules and regulations that need to be implemented during welding, and welding procedure instructions guide the process methods used during welding. Are you satisfied with this answer?
The poster on the 2nd floor said it very well. Let me add one more point: The purpose of welding procedure qualification is: 1. To verify whether the unit is capable of welding joints that comply with regulations, standards, and drawings; 2. To verify the correctness of the welding procedure instructions. The procedure is to compile the WPS first, and then do the welding evaluation. The essence of the welding evaluation is the process verification test before production.
I have a question. The company requires the use of sulfur-resistant materials when making containers. The steel plate used is Q345R and the welding material is E5015. The welding evaluation was done before using ordinary materials. Now that sulfur-resistant materials are used, do I need to do the welding evaluation again?
According to the explanation of NB/T47014, the welding procedure instruction can be understood as the welding working instruction WWI (welding working instruction). PQR should be the welding procedure qualification report, WPQ is the welding procedure qualification, and WPS is the welding procedure specification.
The correct answer on the 8th floor, the specific meaning, is explained in the book "Welding Machine Process Assessment of Pressure-Containing Equipment".