A lot more depends on the selection of the electrode type for successfully carrying out weld with SMAW process. A wrong selection of electrode type may lead to more defects, more repairs. The selection of the correct type of electrode coating results in weld metal with desired quality characteristics at low cost. In general, the welding electrode is selected in such a way that characteristics of weld metal are similar to or better than the base material while keeping in mind the welding position and weld joints design as they significantly affect the properties of the weld. The covering of … Continue reading Electrode flux types and selection (Part 2)

Flux-Cored Electrodes’ Usability Designators: What Do They Mean? Q: I am a new salesperson for a welding supply company. I have noticed that the AWS classification number for many of the flux-cored wires we carry are the same on the front end, but then have different dash numbers on the back end. Some example numbers are E71T-1, E71T-8, E71T-9, E71T-11, etc. Some wires even have two or three numbers on them. I have heard these “dash numbers” called performance capabilities numbers. But what exactly do they mean? Also, how can some wires have more than one AWS number? A:  The dash numbers you … Continue reading Wire electrode specifications

For level 1: The range of qualification for the type of welded joints is as used in the welding procedure test subject to limitations given in other clauses (e.g. thickness) and additionally: a) full penetration butt welds qualify full and partial penetration butt welds and fillet welds in any type of joints; b) butt joints qualify any branch connections; c) fillet welds qualify fillet welding only; d) welds made from one side without backing qualify welds made from both sides and welds with backing; e) welds made with backing qualify welds made from both sides and welds made without backing; f) welds … Continue reading EN 15614 Para 8.4.3 Joint variables

Somehow, the welding engineer will confuse with which samples will be used in PQR preparation for applying the WPS correctly in accordance with Project specifications. Special on Tubular and Non-Tubular application. There are short guideline may help you to choose the samples wisely as below articles and file: What is CJP in welding in Tubular and Non-Tubular AWS D1.1: WPS variables – Joint design Back gouging in welding WPS/PQR – JOINT DESIGN AWS D1.1 tubular vs non-tubular and PQR preparing guidelines   Continue reading AWS D1.1: Non-Tubular vs Tubular 

AWS D1.1 Table 4.5 Para 34: The omission, but not included, of backing or back gouging Keynotes: You can applied the Backing for making better penetration concept, but it does not mean the applied PQR (PJP) is qualified as WPS (CJP) joint, in case of wrong approved WPS (CJP) with supporting PQR (PJP) !!!! Be careful. Short guideline for inspection of these variables on Non-tubular structure: 1: In the stage of WPS approval and review: If the applied PQR with CJP sample, your WPS will cover all type of joints including CJP & PJP, also do cross-check with the WPS … Continue reading AWS D1.1 Table 4.5 para 34 variable

Refer Doc: AWS D1.1 Table 4.5, welding variables Continue on the explanation of requirement on AWS D1.1 – Joint design variable: AWS D1.1 Table 4.5 Para 32: A change in the type of groove to a square groove and vice versa. Keynotes: PQR mentioned V- groove (CJP) with backing/gouging: In this case, you can change WPS to Square groove applying at site, Square groove (PJP) without backing or with backing/gouging (CJP) depend on Fabrication drawing as designed for that joint (If the drawing stated that is PJP, the PJP should be followed the prequalified PJP, Figure 3.2 for assuring the … Continue reading AWS D1.1 Table 4.5 para 32 variable