Q1. In which position a welder can weld in groove welds (in plate and pipe over 24″ OD), if he is qualified in 4G position (As per ASME section IX)? www.weldingandndt.com All positions Flat and Overhead Overhead Flat, Vertical and Overhead (Explanation: According to Table QW-461.9 of ASME Section IX, a welder qualified in the […]
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Q1. How does the presence of molybdenum in SS316 affect its corrosion resistance compared to SS304? Increases resistance to pitting and crevice corrosion Enhances hardness and wear resistance Improves thermal conductivity Reduces ductility and toughness Answer: 1. Increases resistance to pitting and crevice corrosion (Explanation: The addition of molybdenum in stainless steel grade 316 (SS316)
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Q1. What is the primary purpose of a welding procedure specification (WPS)? www.weldingandndt.com To outline the qualifications of the welder To specify the welding process and variables To determine the cost of the welding project To schedule welding activities (Explanation: A Welding Procedure Specification (WPS) is a document that provides the details of the variables
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Q1. Which of the following factors can affect the accuracy of flaw detection in UT? www.weldingandndt.com Beam divergence Surface roughness Frequency of the ultrasonic waves All of the above (Explanation: Ultrasonic flaw detection in UT depends on several factors, with frequency selection being the most prominent. However, other factors also play a crucial role in
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Q1) What is the slag length acceptable for a 75 mm thick weld, as per ASME Sec VIII Div. 1? (www.weldingandndt.com) 4 mm 6 mm 19 mm None of above (Explanation: According to ASME Section VIII Division 1, for welds over 57 mm (2¼ inches) thick, the maximum acceptable length of slag or any defects
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Q1. Which of the following welding processes would give the highest heat input when using typical parameters? Tungsten Inert Gas welding Manual Metal Arc welding Submerged Arc welding Metal Active Gas welding (Explanation: The continuous feeding of the electrode and the use of granular flux contribute to sustained and intense heat, making SAW effective for
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Check Out 20 Must-Know Questions for CSWIP 3.1, AWS CWI Exams, and Job Interviews! These questions are discussed with clear and perfect explanations for welding inspectors, QA/QC Engineers, and CSWIP 3.1 welding inspector exam preparations. Q1. Which welding process utilizes a non consumable electrode? SAW MMA TIG MIG (Explanation: In TIG welding, a tungsten
Question Answers on Welding for CSWIP 3.1 and AWS CWI Exams. Read More »
The weld defect acceptance/rejection criteria are given in Chapter VI (Inspection, Examination, and Testing) of the ASME B31.1 – 2022 Power Piping Code. Chapter VI of ASME B31.1 contains the qualification of NDE Personnel and the acceptance/rejection criteria for the weld defects by the following examination methods; Visual Examination (Para 136.4.2) Magnetic Particle Examination (Para
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For CSWIP 3.1 videos in Hindi/Urdu language, please click here. For CSWIP 3.1 videos in the English language, please click here. CSWIP 3.1 is a certification course for working/experienced professionals who wants to become welding inspector. CSWIP 3.1 is a globally recognized course and it may open the doors for many working
CSWIP 3.1 Video Lectures For Welding Inspector Exam Read More »
For the complete identity of a material we need two things; Material Specification Material Grade For Example, In SA 106 Gr.B the “SA106” is the material specification, and “Gr.B” is the grade of the material. Please note that for a particular specification there may be more than one grade. For example, SA106 has three grades
ASTM A 36 or SA 36 is basically carbon steel of structural quality which is widely used in industries. It is also known as Carbon Structural Steel. ASTM A 36 is readily available in the following product form; Plates Bars Shapes (beams, channels, angles, etc.) In this article following topics will be covered; 1. Mechanical
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The mechanical properties of the metals are those which are associated with the ability of the material to resist mechanical forces and loads. The topic of the mechanical properties of materials is of great industrial importance in the design of tools, machines, and structures. These properties are structure sensitive in the sense that they depend
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WHAT IS A KNUCKLE JOINT? A knuckle joint is a type of mechanical joint used to join two components that are loaded under tensile load. One has a fork with holes on either side, forming a double eye, while the other component has a Single eye. The single eye is inserted between double eyes so
The commonly used terms and definitions related to valves is given below; Actual pressure drop: The difference between the inlet pressure and the outlet pressure of a valve. Actuator: A device used to open/close or control the valve. Key types include electrical, hydraulic, and pneumatic. Movement may be quarter-turn or multi-turn. Actuator stem: A rod
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Pressure Safety Valve / Relief Valve A safety valve is a valve that acts as a protection of equipment from exploding or damaging and it is mainly installed in pressure vessels such as chemical plants, electric power boilers, and gas storage tanks. Safety Relief Valve is a type of valve that automatically actuates when the
Pressure Safety Valve – What is a Valve (Part – 6) Read More »
Introduction: Aluminum is found on the earth in its oxidized form known as Bauxite. Bauxite is refined to produce Alumina (Aluminium Oxide – Al2O3). Approximately 40% – 60% Alumina i.e. Aluminium Oxide (Al2O3) can be extracted from Bauxite. The Hall-Héroult electrolysis process (invented in 1886) further processes Alumina (Aluminum Oxide-Al2O3) to separate it from oxygen.
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In the Valves Part-1, we discussed what is a valve, its history, and its categorization (Click here to read). In Part-2, we discussed Globe valves (Click here to read). In Part-3, we discussed Gate valves (Click here to read). In Part-4, we discussed Plug valves (Click here to read). In Part-5, we discussed Ball valves
Butterfly Valves – What is a Valve (Part – 6) Read More »
In the Valves Part-1, we discussed what is a valve, its history, and its categorization (Click here to read). In Part-2, we discussed about Globe valves (Click here to read). In Part-3, we discussed about Gate valves (Click here to read). In Part-4, we discussed about Plug valves (Click here to read). In this part,
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Low Hydrogen electrodes are very popular in the industries because of the following reasons; Ability to produce X-ray quality welds Good weld bead appearance Ability to weld thicker material with high deposition rates Less susceptible to failures and cracks especially Hydrogen Induced Cracks Sound weld metal properties with good toughness A smooth, stable and quiet
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This article covers the following topics/questions; What is stainless steel? Types of stainless steel. Is stainless steel magnetic? Stainless steel welding and weldability. How to select the welding rod or filler wire? we will start this article with the first topic/question i.e what is stainless steel? WHAT IS STAINLESS STEEL? Stainless steels (SS) are essentially
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Underwater welding plays a crucial role in repairing ships, offshore structures like oil drilling rigs, and submerged pipelines. The process of retrieving damaged components from underwater for repairs can be both costly and time-consuming. This is where underwater welding comes in, offering a cost-effective and efficient solution. One unique aspect of underwater welding is that
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In the Valves Part-1, you learned what is a valve, its history, and its categorization (Click here to read). In Part-2, you learned about Globe valves (Click here to read). In Part-3, you learned about Gate valves (Click here to read). In this, you are going to learn about Plug Valves categorized by design.
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In the Valves Part-1, you learned What is a valve, its history, and its categorization (Click here to read). In Part-2, you learned about the Globe valve. (Click here to read) In this, you are going to learn about Gate Valves categorized by design. Gate Valves: Gate Valve is a multi-turn valve that has a
Gate Valves – What is a Valve (Part – 3) Read More »
Scope: In this article fundamentals of heat treatment will be discussed briefly mainly related to the “base material” of welded construction (metallic material) meant for industrial application. In Part-0, we had discussed the basics from a theory point of view generally taught in engineering colleges (Click here to read Part – 0). In the present
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Scope: In this article, fundamental concepts of heat treatment will be discussed to give an overview to the reader with no previous knowledge of heat treatment processes. Why Part-0: Well, the readers might be wondering why this part or rather an article has been named as zero. Just like the thermodynamics (the study of particles
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The selection of right welding electrodes is a quite challenging job because we need to consider many factors while choosing the best alternative. In this article, we will discuss the various factors responsible for choosing the right welding electrode for the Shielded Metal Arc welding Process (SMAW) for Carbon steels. The Shielded metal arc welding
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Scope: In part-2, of this article, we had discussed the sequence to be used for qualification of procedure (PQR) which needs to be approved by customer/client/TPI. (Please click here to read that article) Now we shall proceed for performance (welder) qualification i.e Welder performance qualification – WPQ or welder qualification test – WQT (which will
