PIPELINE

KTM Zero Current Magnet Engine Technique

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Posco to produce & supply high manganese steel to ExxonMobil for slurry pipes

South Korea’s largest steel maker Posco announced on Wednesday it has agreed to supply commercially developed high manganese steel to U.S. oil company ExxonMobil for slurry pipelines. The piping technology has been co-developed by the two companies over the past five years. Posco’s proprietary high manganese steel contains 3 to 27 percent of manganese (Mn), featuring various properties of wear resistance, non-magnetic, high strength/high formability, and excellent cryogenic temperature toughness depending on Mn concentration. Slurry pipes require high-level abrasion-resistant properties as they are used to transport coarse oil sand slurries. The high manganese steel boasts five times more excellent anti-wear property compared with existing steel materials, and the product becomes sturdier ...

How Ball Valves Work?

Valves play an important role in manufacturing various kinds of items we use or come across on a day-to-day basis. From bicycles or automobiles, jet airplanes, or the oil you use for cooking—all are results of valves in some form or another. However, there are a range of valves. Each differs in not just its shape and dimensions, but also its function and application. In this post, we look at how ball valves work, its different types, and some reasons why it should be used. WHAT ARE BALL VALVES? These are valves that make use of a ball to navigate the movement of substances from one seating surface to another. The function of the ball is similar to a track ball found in old computer mice. However, the ball in the valve consists of a port, which changes alignment in response to the position ...

Introduction to Valves – Pressure Seal Valves

PRESSURE SEAL VALVES Pressure seal construction is adopted for Valves for high pressure service, typically in excess of above 170 bar. The unique feature about the pressure seal Bonnet is that the body-Bonnet joints seals improves as the internal pressure in the Valve increases, compared to other constructions where the increase in internal pressure tends to create leaks in the body-Bonnet joint. PRESSURE SEAL DESIGN A/B – BONNET TENDENCY TO MOVE UP OR DOWN AS PRESSURE CHANGES C – SYSTEM PRESSURE D – SEALING FORCES DUE TO PRESSURE The higher the internal pressure, the greater the sealing force. Easy dismantling is made possible by dropping the Bonnet assembly into the body cavity and driving out the four-segmental thrust rings by means of a push pin. Relying on fairly sim...

5 Benefits of Nickel Alloy Pipes

Nickel 101 Nickel is a ductile, hard, silvery white material. You rarely find it alone, but you will find as an alloy in a wide variety of different materials. It’s used in the coins we pay with, the tools we build with and many other stainless steel items, including household objects like magnets, batteries and ceramics. It can even be added to things like guitar strings and glass. And, of course, you’ll find it a number of different nickel alloy pipes, which is our favorite application! The Benefits of Nickel Alloys Okay, so nickel alloy is fairly ubiquitous material. But why? Well, it has a number of different characteristics that make it useful in a variety of environments. Some of them include: Resistance to Heat Certain nickel alloys can withstand extremely high temperatures. Nickel-...

Types of Valves Used on Ships: Gate Valve – Part 1

A variety of valves are used in the piping and machinery systems of the ship as per the need of the flow pattern of the liquid. All valves used on ships have the basic functionality of regulating the flow of the liquid in the pipes. Valves are used for almost all machinery systems on ships for controlling and regulating fluid through pipes. Although valves are known as efficiency decreasing device as they reduce the energy in the liquid flow, their use is imperative in applications where limited flow is required. Therefore, for any aspiring or serving marine engineer, it is extremely necessary to know about construction and working of various types of valves used on ships. In this first article of the series “Types of valves used on ships”, learn about one of the most important valves used...

The Advantages of Using Butterfly Valves

What Is A Butterfly Valve? A butterfly valve is a quarter-turn valve used to regulate flow. A metal disc in the body of the valve is positioned perpendicular to the flow in the closed position, and rotated one quarter of a turn to be parallel to the flow in the fully opened position. Intermediate rotations allow regulation of liquid flow. They are often used in agricultural and water or wastewater treatment applications and are one of the most common and well-known valve types.   Advantages of a Butterfly Valve Butterfly valves are similar to ball valves but have several advantages. They are small and, when actuated pneumatically, open and close very quickly. The disc is lighter than a ball, and the valve requires less structural support than a ball valve of comparable diameter. Butte...

Temperature Considerations for Pressure Relief Valve Application

The process of selecting or evaluating correct set pressure for pressure relief valve application is relatively straightforward – the set pressure of the pressure relief valve is compared to the pressure vessel maximum allowable working pressure (MAWP). The correct set pressure can be determined by using ASME Code rules and the general principle that at least one valve must be set at or below the MAWP. The Code does not thoroughly explain temperature considerations, and application concerns related to temperature are just as important as proper selection of the correct set pressure. The purpose of this article is to examine some of these concerns when applying pressure relief valves in pressure vessel service. One concern is selecting correct material for pressure relief valve construction...

Theory of Oxy-Fuel Gas Cutting

Oxy-Fuel gas cutting is functional for use with low carbon and low alloy steels, with a carbon content generally restricted to 1/10 to 3/10 of 1%.  The various alloy elements found in steel affect the ability of the oxygen to cut the metal.  Elements such as manganese, silicon, phosphorus, and sulfur have very little effect in normally found levels.  Other elements such as chromium, nickel, molybdenum, and carbon generally reduce the ability of oxygen to sever the material up to the various limits of each. Prior to attempting to flame cut a piece of material, you must study it and consider the elements it contains as well as the combinations of these elements, just as you would if you studied the metal for physical properties for heat treatment, flame hardening, etc. A cutting torch divert...

Tube vs Pipe – The Differences

Even looking on the internet can lead to confusion, as many websites have mistakenly misidentified the real differences between them. Well, since I’m a know-it-all, let me try and explain as best I can what exactly differentiates tube and pipe. There’s a nifty looking infographic you can share at the bottom. Tubing Tubing is generally used for structural purposes and the OD is an important and exact number. Tubing size is specified by OD and the wall thickness (WT); and the measured OD and stated OD are generally within very close tolerances of each other. Tubing is usually more expensive than pipe due to tighter manufacturing tolerances. Interestingly, while the stated and measured OD’s of tubing are almost exact most of the time, copper tubing generally has a measured OD that...

Globe Valve Used on Ships : Design and Maintenance

Glove valve, a type of valve, is commonly used on board ships in places such as bilge suction lines. A linear motion valve, which regulates the flow of the fluid, the valve has a globe (bulbous) shaped body that houses the valve seat and the disc. The general arrangement of a globe valve consists of the valve seat and the disc arranged at right angle to the axis of the valve. The perpendicular movement of the disc, away from the valve seat, causes a space between the disc and the disc ring, which opens the valve. This characteristic provides good throttling ability to the globe valve which is extremely helpful in regulating the flow of the fluid. The globe valve is used not only in starting and stopping the fluid flow but also for regulating the same. Construction of Globe Valve Though the...

How does it work: Butterfly Valves

A butterfly valve is a flow regulating disc valve. According to the BVAA, a butterfly valve is “a valve in which the obturator rotates about an axis at right angles to the direction of flow and, in the open position flow passes around the obturator.” In other words, a butterfly valve consists of a circular disc or plate built with a stem through the middle or attached offset. When opened, the disc pivots 90 degrees in the valve bore, aligning with the flow, creating a nearly unrestricted flow path. Butterfly valves operate similar to ball valves in their 90 degree rotation and allow for quick shutoff. Butterfly valves have gained popularity over the years due to their thin profile between flanges, making them lighter in weight and creating a smaller install footprint. This compact design a...

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