Bill SandfordBill Atkinson The increasing use of advanced equipment and applications such as orbital welding for high-purity systems requires better weld preparation.
According to the American Welding Society AWSa WPS provides in detail the required welding variables for specific application to assure repeatability by properly trained welders. The AWS defines welding PQR as a record of welding variables used to produce an acceptable test weldment and the results of tests conducted on the weldment to qualify a Welding Procedure Specification.
For steel construction civil engineering structures AWS D1. It specifies either a pre-qualification option chapter 3 or a qualification option chapter 4 for approval of welding processes. The record also contains the test results of the tested specimens.
A record of the procedure qualification test and the results must be documented on a procedure qualification record PQR.
EN ISO defines a WPS as "A document that has been qualified by one of the methods described in clause 6 and provides the required variables of the welding procedure to ensure repeatability during production welding". The same standard defines a Welding Procedure Qualification Record WPQR as "Record comprising all necessary data needed for qualification of a preliminary welding procedure specification".
In the oil and gas pipeline sector, the American Petroleum Institute API standard is used almost exclusively worldwide.Choosing a Butt Weld Joint Preparation Which joint configurations provide the best economy? Here is an examination of the “pro-versus-con” arguments that must be weighed out in order to make an informed decision when choosing between U-groove and V-groove joint preparations and small bevel versus large bevel configurations.
A good weld starts with good preparation. This is the place to find information on equipment for beveling, deburring, grinding, and sanding.
Cutting and Weld Prep. Tips for preparing your material before welding. May 15, | By John. After reading this article you will learn about: 1.
Meaning of Electric Arc Welding 2. Procedure of Electric Arc Welding 3.
FIELD WELDING PROCEDURES 4th Edition -June Table of Contents Welding Procedure Specification (WPS) may be generated by an authorized person (i. e. CWI) testing and inspection of welds, preparation of material, oxygen cutting, electrodes, shielding, and shear studs, meeting the requirements of the Bridge Welding. Choosing a Butt Weld Joint Preparation Which joint configurations provide the best economy? Here is an examination of the “pro-versus-con” arguments that must be weighed out in order to make an informed decision when choosing between U-groove and V-groove joint preparations and small bevel versus large bevel configurations. Welding Procedure Data sheet and Welding Procedure Specification prepared using our WeldProc welding software allows us to offer low cost solution to our customers for their welding procedure needs. I have used CWB Welding Procedure Preparation services from WeldProc. Welding procedures prepared by weldproc are accurate and code compliant.
Electric Current for Welding 4. Significance of Polarity 5. Equipments 6. Edge Preparation of a Joint 7. Electrodes.
The arc welding is a fusion welding process in which the. WELDING PROCEDURE PREPARATION ® Back gouging (Yes/ No, Method, Depth) Back gouging is the removal of weld metal and base metal from the weld root side of a welded joint to facilitate complete fusion and complete joint penetration upon subsequent welding from that side.
Methods include grinding to sound metal (GTSM), air carbon arc and plasma.5/5(5).
Welding procedure includes the entire range of activities from edge preparation, selection of welding process and their parameters (welding current, speed), welding consumable (welding electrode and filler, flux, shielding gas), post weld treatment etc needed for development of a. Tips for welding preparation How machine, materials, and tool bits affect the results.
The Tube & Pipe Journal July\August August 10, By: Bill Sandford, Bill Atkinson The increasing use of advanced equipment and applications (such as orbital welding for high-purity systems) requires better weld preparation.