Welding till the End!
Gas Metal Arc Welding (GMAW), commonly known as MIG (Metal Inert Gas) or MAG (Metal Active Gas) welding, is a versatile and widely used welding process in which an electric arc is established between a consumable wire electrode and the workpiece metal. This arc generates intense heat, causing the workpiece metal to melt and fuse …
Gas Metal Arc Welding (GMAW): A Comprehensive Guide Read More »
Hydrogen cracking, also known as hydrogen-induced cracking or HIC, is a common concern in various industries, particularly in the field of metalworking, welding, and construction. This phenomenon occurs when hydrogen atoms infiltrate the microstructure of a metal, causing it to become brittle and prone to cracking. Understanding the common causes and effective cures for hydrogen …
Hot cracking is a metallurgical phenomenon that often occurs during welding and casting processes, leading to structural defects and compromised material integrity. Understanding hot cracking and its causes is crucial for engineers, welders, and anyone involved in the fabrication of metal components. In this blog, we will delve into the world of hot cracking weld …
A stress-strain curve is a visual representation illustrating how a material behaves under increasing loads. Stress, which is the ratio of force to cross-sectional area, and strain, the ratio of a change in dimension length to the original length, are the defining factors in this graph. These curves can be constructed to examine how materials …
Welding P91 material, a high-strength, heat-resistant alloy often used in high-temperature applications such as power plants, requires careful consideration of the welding process and the choice of welding electrodes. Both E9015-B91 and E9018-B91 electrodes can be used for this purpose, but E9015-B91 is preferred.
The selection of a specific welding electrode for welding stainless steel, such as SS321, depends on various factors including the application, welding process, and the desired properties of the weld joint. E347 and E321 are both stainless steel welding electrodes, but they have different chemical compositions and are designed for different purposes: Chemical composition of …
When weld defects form in a weld they can weaken the joint. In some cases, this results in complete failure of the weldment. In serious cases, there can be severe consequences to a failing weld. So, you need to understand the various common welding defects. But in addition, you must know how to prevent them from …
8 Most Common Welding Defects, Causes & Remedies Read More »
In this article we will discuss about the taper transition requirement for dissimilar thickness as per ASME Section VIII Division 1: What is Taper Transition? Transition is formed by removing the material by grinding or machining from the thicker material section to match it with the thinner section’s thickness. When Taper Transition required? Taper transition …
Taper Transition Requirement for Dissimilar Wall Thickness Read More »
This article is regarding the benefits of weld consumable calculation. Steps to calculate weld consumable & we will calculate weld consumable for single “V” groove joint. You can also download our simplified weld consumable calculator for single V groove joints, Single V branch Joints, Fillet joints, deposition efficiency, electrode calculator for SMAW welding process, Importance …
Weld Consumable Calculator for “Single V Groove joint” Read More »
ASME Boiler and pressure vessel code (BPVC) Section IX has assigned certain numbers to base metals to minimize the number of procedure and qualifications these are P-Number, Group No, F-Number and A-Number in welding. Base metals are categorized as P number is further divided in group numbers based essentially on comparable base metal characteristics, such …
P-Number, Group No, F-Number and A-Number in welding (ASME Section IX) Read More »
For fabrication of any equipment we require welders and welding operators must be qualified as per the qualification standard referred by the construction code. Whenever construction is as per ASME construction codes (like ASME B31.1, B31.3 or ASME section VIII) ASME section IX is used for the qualification of the procedure and welder. Welder is …
Welder Qualification (WPQ) as per ASME Section IX Read More »
This article is about diameter restrictions and welding position qualification involves in welder and welding operator qualification as per ASME Section IX. Diameter Restriction for Welder Qualification (as per QW-303) 1) If welder is qualified by groove weld during test, then the qualification range will be below (as per table QW-452.3 and table QW-452.6) Note: …
Welder’s Diameter Restrictions and Position Qualified Read More »
In this article we will discuss the thickness qualification range of base metal and weld metal for Procedure qualification and Welder performance qualification as per ASME code. Thickness Qualification Limit for Procedure Qualification (PQR) 1) As per ASME Section IX a) For Groove Weld (As per table QW-451.1) Note- For PQR there is no any …
In this article we have discussed about the difference between welder and welding operator, purpose of their qualification and how ASME section IX divided the welding in manual, semi-automatic, machine and automatic welding.
In this article we will discuss about the Supplementary Essential variable for GTAW, SMAW, SAW and GMAW welding process as per ASME BPVC Section IX for qualifying a groove weld PQR (Procedure Qualification Record). What is supplementary Essential Variable? A supplementary essential variables are those variable in which change will affect the toughness property of …
“Supplementary Essential Variable, ASME Section IX” Read More »
This article will cover the essential mechanical testing procedures outlined in ASME BPVC Section IX (ASME section 9)for the qualification of a groove weld PQR (Procedure Qualification Record), including details on specimen extraction location, the objectives of the testing, and criteria for acceptance. Testing Requirement: QW-451 outlines the specific type and quantity of test specimens …
Mechanical Testing Requirement as per ASME BPVC Section IX Read More »
This article is about Welding Position involved in fabrication of Pressure Vessel, Piping and Pipelines. Different welding standard specifies different welding positions for welder. Welding position is specified as per the position of work piece before and during welding. Position of welding is specified in ASME section IX and EN ISO 6947. Welding position is …
Introduction Shielded Metal Arc Welding (SMAW), commonly known as stick welding, is a pivotal manual arc welding process. It employs a consumable electrode enveloped in a flux to fuse metals together. Renowned for its versatility and simplicity, SMAW has earned its place as one of the most widely used welding techniques globally. This comprehensive guide …
Shielded Metal Arc Welding (SMAW): The Complete Guide Read More »
In the world of non-destructive testing (NDT), dye penetrant testing is a widely employed method for detecting surface-breaking defects in various materials, including metals, plastics, and ceramics. This technique, often referred to as liquid penetrant inspection or simply penetrant testing, plays a crucial role in ensuring the structural integrity and safety of a wide range …
Tungsten Inert Gas (TIG) welding, also known as Gas Tungsten Arc Welding (GTAW), is a highly precise and versatile welding process used in various industries. One of the key components in TIG welding is the tungsten electrode. These electrodes come in various types, each designed for specific applications and materials. In this article, we will …
Sensitization is a phenomenon that can occur in stainless steel. It is a critical concept that needs to be understood as it can adversely affect the performance of stainless steel. This causes the steel or alloy to become susceptible to intergranular corrosion or intergranular stress corrosion cracking (SCC). What are stainless steels? Stainless steels are …
Austenite and ferrite stabilizing elements are terms used in the context of alloying elements in steel and other materials to describe their influence on the microstructure and phase composition of the material. These elements promote the formation of either the austenite phase or the ferrite phase, which are two different crystal structures in metallic materials. …
What are austenite and ferrite stabilizing elements? Read More »
Gas Tungsten Arc Welding (GTAW), also known as TIG welding, is a captivating combination of science and craftsmanship. It is considered one of the most precise and versatile methods in the welding industry, capable of producing flawless and superior welds in different materials. In this blog, we will explore the fundamental principles, necessary equipment, essential …
