Boyle’s Law is a fundamental principle in physics that describes the relationship between the volume and pressure of a gas at a constant temperature. It was named after the Irish scientist Robert Boyle, who discovered the law in 1662. This article will explain Boyle’s Law, its equation, and provide some examples to help readers understand … Read more
Why and where it is used? Bag filter is used where the dust products like bed material in power plant, lime powder, cement, big floor mill wastage, etc. powder products used as a output or input material. This bag filter is attached on the upper portion of the bunker of the material. And if we … Read more
Advances in Extrusion Process Extrusion of metals and alloys, as well as metallic composite materials, has seen substantial scientific and technological advancement in recent years. This mostly relates to the idea of optimizing existing processes and attempting to implement new ones that are near to “ideal,” but it also applies to the development of new … Read more
Indian Standard for Gas Cylinder Color Code Identification of for Medical use This standard applies to the identification of the contents of gas cylinders intended for medical use. Gas Cylinders -Each cylinder shall be painted externally in the colours corresponding to its gaseous contents as shown in Table 1. The identification colours to be applied … Read more
Indian Standard for Gas Cylinder Color code Identification of for Industrial use 1. Scope (Purpose to use) This standard covers the method of marking industrial gas cylinders up to and including 130 litres water capacity to identify their contents. It excludes medical gas cylinders identification of which is covered in IS:3933-1966 Color identification of gas … Read more
Painting vs Coating / Difference between Painting and Coating Due to no clear definition for any term in the regulations and standards, the names are frequently used interchangeably. The term “painting specification” has traditionally been applied to industrial applications. However, many end-users are currently altering the title of their specification to “Protective Coating Specification” or … Read more
Intermediate Stress Relieving ISR Heat treating a subassembly in a furnace to a specified cycle after critical constrained weld joint / joints have been completed without allowing the welds to cool below the pre-heat temperature. The rate of heating, soaking temperature, soaking time, and rate of cooling are all affected by the quality and thickness … Read more
Post Weld Heat Treatment PWHT Post Weld Heat Treatment PWHT is a controlled process in which a welded material is reheated to a given temperature, kept at that temperature for a specified amount of time, and then cooled at specific rates to achieve the following objectives….. Stress Relieving This is the stress relief process, which … Read more
Dehydrogenation Heat Treatment (DHT) or Post-heating Dehydrogenation Heat Treatment (DHT) is a treatment utilised specifically when welding or preheat is paused or stopped during the fabrication cycle or PWHT is not done immediately due to further fabrication requirements. It is usually done at 300-350 °C [600 – 650˚F (min 570 ˚F)]. Very common and used … Read more
Preheating Before beginning welding, heat the weldment to a minimum predetermined temperature and maintain it throughout the welding process is called preheating. Preheating is the process of elevating the temperature of the parent material on both sides of the joint to a temperature that is higher than ambient. Preheat is normally required by the relevant … Read more