Friday, January 22
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the most common welding defect

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What is welding defects? Welding defects may be define as a discontinuity or discontinuities that failed to meet the minimum acceptance per standard or specifications. Defects may occurred in excessive conditions, outside the acceptance limits which risks to compromise the stability or the functionality of the welded structure. They are also acceptable discontinuities, the same type of discontinuity of a lesser degree, might be considered harmless and acceptable. Weld defects happen for a host of reasons. Air may creep into the weldment to cause porosity. The wrong amount of heat can cause cracking. Bad welding technique can cause undercuts or incomplete penetrations of one kind or another. Various factors contribute to weld problems, but many lead back to the same place. In fact, mo...

wall thickness calculation as per ASME

mechanical engineer
Wall Thickness Calculation is a document that aims to ensure that the selected wall thickness value meets international standard code rules by attaching the calculation results in the form of a table. Code type used must be in accordance with the type of service passed by piping line. On this occasion, Dad Engineer chose ASME B31.3 as the basis of reference formula to calculate Wall Thickness on pipe. In addition to ASME B31.3, there is also another reference which is ASME B31.8 which is used for service pipeline. Here is the formula used in ASME B31.3 2010: t = thickness value according to design pressure P = internal design pressure value D = Outside Diameter (OD) pipe according to standard table S = Stress value material from table A-1 E = Quality factor of tables A-1A and...

Introduction to Flange type and size

mechanical engineer
Answering what is flange? Flange pipe is a component used to combine between two elements of pipe with valve or pipe with other equipment into one whole unit by using bolts as adhesive. So that later the two separate objects can become one part for a specific purpose. Usually these flanges are used to unite and become a single patent connection. So with this pipe flange the effort to connect 2 parts into one will become easier. Especially for high pressure gas pipes or for water distribution systems require long pipes. So it is this tool that has the responsibility to unify the passage. Flange type by Class Flange or other forging names (for self reinforcement types), can be several types when viewed from the class. Namely flange class 150#, 300#, 600#, 900#, 1500#, 2500# even up to...

cmms preventive maintenance software

data management
Assets / Equipment Module Asset / equipment data registration: tag number, name, location, asset code and group, manufacturer, serial number, type / model, criticality priority Asset / equipment safety information Asset / equipment spare part catalog Electronic documents attachment such as drawings, pictures, manual books etc. Shows asset / equipment in tree structure Preventive Maintenance Library Module (time based) Create calendar based Preventive Maintenance library Create Preventive Maintenance library with detail information of work to be done, safety precautions, man-power required, spare part or consumable required, required documents. Assign Preventive Maintenance to asset’s code Transfer Preventive Maintenance into work order ready for executio...

application of fluid mechanics

Uncategorized
why we learn fluid mechanics? Fluid mechanics is essentially the study of fluids either in motion (fluid in dynamic mode) or at rest (fluid in stationary mode). A fluid is defined as a material that continuously deforms under a constant load. There are five relationships that are most useful in fluid mechanics problems: kinematic, stress, conservation, regulating, and constitutive. The analysis of fluid mechanics problems can be altered depending on the choice of the system of interest and the volume of interest, which govern the simplification of vector quantities. By assuming that a fluid is a continuum, we make the assumption that there are no inhomogeneities within the fluid. Viscosity relates the shear rate to the shear stress. Definition of a fluid as Newtonian depends on whether th...

Guided wave pipeline inspection

inspection
the current inspection technology named LRUT is widely used by oil and Gas company. Basically, LRUT sometime called as Guided waves are mechanical stress waves that propagate contained within the structural boundaries of pipes or plates with wavelengths that are comparable to the thickness dimensions of the pipe or plate. LRUT / Guided waves are used by inspection company in rapid testing or Screening tools to detect, locate and classify corrosion defects. Large sections of pipeline / piping can be quickly screened with 100 % coverage to determine precise locations of metal damage. After conducted the screening, more detailed inspections can then be focused on the locations that are critical, thus saving money and time. These local inspections can be done using guided wave Scanning e...

welding inspector course

inspection
What is Welding Inspection? Welding inspection is the use of technological applications to inspect or assess the quality of the welds. It is also to confirm the presence, location and coverage of the welds. In the field of fabricator, the welds are used to connect two or more metal surfaces. As the welds carry the brunt of loads, it can encounter fatigue which may be detrimental if proper inspection is not carried out. There are many reasons as to why welding inspection should be carried out. However, the most prominent reason is to ensure that the welds are of the quality that will allow them to carry out their performance to the max. In most cases, quality of the welds is determined on the basis of which functions it performs. There are some few ways to tell if a weld is correct. Wh...

what is Non destructive testing ( NDT)?

inspection
Today, non -destructive testing is most often understood as an analysis of the reliability and other properties and the main working characteristics of the entire object or its individual elements (sections), not related to the removal of this object from work or its dismantling. In other words, we are talking about checking the product without any destruction (nondestructive inspection-NDI). And this is precisely its main difference from destructive control. A simple example. In order to assess the tensile strength of an object, in any case, it is necessary to apply a load, after which the object will no longer be suitable for operation (car crash tests can be referred to such methods). As for the basic methods of non-destructive testing, then they are such methods as : magneti...

welding inspector job

welding
Before starting to consider technical issues, attention should be paid to the personal qualities and typical duties of a welding inspector. The Welding Inspector is the responsible person involved in determining the quality of the welds based on applicable collections of norms and rules and / or specifications. Inspectors carry out their duties in a wide variety of circumstances, which, first of all, vary depending on which organization they work for. Thus, when working with complex elements and structures, there is a need for job descriptions. Participants in control activities may include destructive testing specialists, non-destructive testing specialists, technical inspection inspectors, military and state inspectors, representatives of the owner’s company, internal controllers, and...

Mechanical engineering quotes

mechanical engineer
Mechanical engineering folks create and shape the technological space surrounding a person, literally nurture new high technologies. The record of mankind recognize a lot of number of examples of the creativity of mechanical engineers who improved our lives. For example, Henry Ford, an American industrialist and engineer introduced in-line production of cars on a conveyor belt in August 1908. Another example , In May 1913, the Russian Knight ascended engineer Sikorsky design, and in October 1945, American engineer Percy Spencer received a patent for a microwave oven, which no kitchen can do without today. And such examples from history can be given a huge number. Archimedes - was born in 287 BC. e. in the city of Syracuse, the island of Sicily. Ancient Greek mathematician, physici...