Relevant specifications BS EN 10002 Methods of tensile testing of metallic materials.BS EN 876 Destructive tests on welds in metallic materials – longitudinal tensile test.BS EN 895 Destructive tests on welds in metallic materials – transverse tensile test.BS EN ISO 7500-1 Tension/compression testing machines. verification and calibration of the force measuring system.ASTM A370 Mechanical testing of steel products.ASTM E8 Tension testing of metallic materials.ASTM B557 Tension testing wrought and cast aluminum and magnesium alloy products. In engineering and materials science, a stress–strain curve for a material which showing the relationship between stress and strain of a material section subjected to … Continue reading What is Stress and Strain Curve?
The Marangoni effect is the mass transfer along an interface between two fluids due to the surface tension gradient (which fluid from areas with low surface tension is transferred to areas with higher surface tension). In particular, a negative value … Continue reading What is Marangoni effect in GTAW welding?
As discussed in our previous article Preheating temperature distance range preheat is really necessary in steel welding to control the cooling rate. More specifically, preheat is used to slow the cooling rate down in order to prevent excessive hardness in the … Continue reading How to determine preheating exemption in welding?
A submersible pump is an equipment that pushes the fluid to the surface instead of pulling it out. This pump has a sealed motor coupled with the pump’s body that pushes the liquid to the surface. Submersible pumps are mainly … Continue reading What is Submersible pump
If you own or work at a job shop you may have noticed an increase in the number of customers that require the use of qualified welding procedures to build their products. Some fabricators are even getting this request from long time customers who never required them in the past. So why is this? The purpose of having a welding procedure specification (WPS) is to give the welder detailed instructions on how to make a weld. These instructions consist of parameters that need to be used such as amperage, voltage, travel speed, transverse and travel angles, gas flow rate, etc. … Continue reading Why WPS need to be qualified?
Example of balancing a huge fan with much more vibration than first one. Result after repair: Vibration went from 3.1 mm/s to 0,2mm/s. Total 1,6kg was needed to get it perfect 🤩 #vibrationanalysis #vibrationtesting #balancing Continue reading Vibration test example
If you don’t know how API 570 Certification scheme, See API 570 Certification Instruction IMPACT TESTINGThe inspector should be able to:a) Determine the minimum metal temperature of a material (MDMT), which is exempt from impact testing (ASME B31.3, Section 323.2.2, Figure … Continue reading API 570 Quiz (ASME 31.3 – MDMT and Impact Test)
If you don’t know how API 570 Certification scheme, See API 570 Certification Instruction PRESSURE TESTINGThe inspector should be able to:a) Demonstrate knowledge concerning hydrostatic leak testing (ASME B31.3 Section 345.4)b) Demonstrate knowledge concerning pneumatic leak testing (ASME B31.3 Section 345.5)c) … Continue reading API 570 Quiz (ASME 31.3 – Pressure Testing)
In this topic (most difficult part in EXAM), we will try one by one of the Open/Close questions on Module ASME 31.3 – Design pipe thickness as a part of in-the-exam API 570 Body of knowledge (BOK) If you don’t know how API 570 … Continue reading API 570 Quiz (ASME 31.3 – Design pipe thickness)