2 February 2022


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Welding Procedure for Overlay Weld or Cladding

This document covers the procedure to prepare a WPS – Welding Procedure Specification & PQR – Procedure Qualification Record for Overlay weld, Corrosion Resistant Overlay and Wear Resistant Overlay  both. The procedure refers international standard ASME BPVC Section IX, ( American Society of Mechanical Engineers,…
welding electrodes
27 January 2022


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CLASSIFICATION OF WELDING ELECTRODES

Classification of welding electrodes consists of a prefix letter “E” specifying an electrode, a group of two or three digits specifying weld metal strength in ksi in the ‘as-weld’ or stress relieved condition, and a final two digits specifying type of covering, weld position…
welding inspection
21 January 2022


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Concepts of Welding Defects and Discontinuities

Welding defects can be classified as structural discontinuities and consist of: porosity, slag inclusions, lack of fusion, cracks, etc. Porosity is gas pockets or voids in the weld metal which are free of any solid materials, such as It is formed as a result…
Arc welding process
13 January 2022


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WELDING PROCESSES

The welding processes are not the scope of this manual, specific for welding inspections. However, only for refreshing, the most common arc welding processes used in heavy and medium carbon  and alloy steel manufacturing are: SMAW: Shielded Metal Arc Welding – stick welding electrode; GMAW: Gas…
welding
8 January 2022


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Fillet Weld Sizes as per AWS D1.1 & AWS D1.2

Fillet Weld Sizes as per AWS D1.1 & AWS D1.2 This blog here answers your questions about: What is the tolerance for Fillet weld sizes as per AWS D1.1 ? What is the weld size tolerance? What is the required fillet weld size for structures…
fillet welds
24 December 2021


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Fillet Weld Types

Fillet Weld Types: The single-fillet-welded T-joints are indicated from both the arrow side and the other side. The symbol for a double fillet-welded T-joint is also Note that the assembly of two T-joints welded pieces involves four fillet welds represented by two double-fillet-weld symbols.
standards for welding
18 December 2021


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Standards and Specifications for welding

WELDING INSPECTOR KNOWLEDGES: The Welding Inspector must be a high skilled technician or engineer with a good knowledge of general industry manufacture, materials, quality systems, inspection procedures and Standards and Specifications for welding as:   Standard organizations as ASTM, SAE, AISI, AWS, ASME and other institutions; …
welding procedure
10 December 2021


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WELDING ELECTRODES AND PREHEAT REQUIREMENTS

The procedure requirements for welding electrodes and preheating temperatures are as follows: Welding must be done with the same process (SMAW or FCAW) used for qualification If the operator has qualified on any of the steel permitted (ASTM A36 and A588), that same operator…
mechanical testing
3 December 2021


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Mechanical Properties

The mechanical properties of a material are those properties that involve a reaction to an applied load. The mechanical properties of metals determine the range of usefulness of a material and establish the service life that can be expected. Mechanical properties are also used to…
27 November 2021


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Forging

Forging is a manufacturing process involving the shaping of metal using localized compressive forces. Forging is often classified according to the temperature: “cold”, “warm”, or “hot” forging.  Forged parts can range in weight from less than a kilogram to 580 metric tons. Forged parts usually…