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What is API 5L Line Pipe?

What is API 5L Line Pipe? API 5L Line Pipe is one of the transportation method used for transporting oil, natural gas and water through pipeline to the oil and gas industry company.  Types Specification Ends Types Standard Connection Types Test Methods Steel Grade Benefit Types of API 5L Line Pipe: Seamless Line Pipe Welded Line Pipe API 5L Welded Line Pipe API early in 1926 released by the American Petroleum Institute (API) API-5L standard, initially including three steel grade A25, A, B, and later released several times. API 5L welded steel pipe is mainly used for the delivery of the […]

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Common causes of flange leakage

Human factors are still the number one cause of flange leakage. The PVRC study (observation and discovery after failure) illustrates the causes of seal failure and highlights the following underlying causes of failure: Flange misalignment (12%) Loose bolts (15%) Defective gasket (22%) Flange damage (25%) Improper installation (26%) Studies have shown that the total number of seal failures caused by damaged parts, misaligned equipment, and incorrect joint assembly operations exceeds the number of failures caused by gaskets. For the integrity of the connection, the basic influencing factors include the ability of the relevant staff in the inspection/assembly process and the […]

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Can stainless steel flanges and carbon steel pipes be welded together directly?

Today, a customer asked me when installing the pipeline system on site: stainless steel flanges and carbon steel pipes, why not install them directly? Separate the protective pad (Teflon) in the middle to isolate it! The author below will share with you the reasons based on years of installation experience! A carbon steel pipe can be identified with Grade A or B, a stainless-steel pipe with Grade TP304 or Grade TP321, a carbon steel fitting with Grade WPB etc.. Below you will find as an example 3 tables with chemical requirements for: Stainless Steel Flanges according to ASTM A182 Grade F304, […]

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What Is A Bellows Expansion Joint?

What Is A Bellows Expansion Joint? A bellows expansion joint (compensator) is an expansion joint made of a metal bellows. It is a flexible, thin-walled, transversely corrugated telescopic device consisting of a metal bellows and components. The working principle of the bellows compensator is mainly to use its own elastic expansion function to compensate the axial, angular, lateral and combined displacement of the pipeline due to thermal deformation, mechanical deformation and various mechanical vibrations. Pressure, sealing, corrosion resistance, temperature resistance, impact resistance, vibration and noise reduction, reduce the deformation of the pipeline and improve the service life of the pipeline. […]

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Lap Joint Flange VS Weld Neck Flange

What is a lap joint flange? A Lap Joint Flange (LJ flange/Loose flange) is a two piece device that is much like a weld-neck flange but also like a loose slip-on flange. One piece is a sleeve called a ‘Stub-end” and is shaped like a short piece of pipe with a weld bevel on one end and a narrow shoulder on the other end called the hub. The hub is the same outside diameter as the raised face (gasket contact surface) of a weld neck flange. The thickness of the hub is normally about ¼” to 3/8″. The back face of the […]

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Pipe Coupling VS Olets

What is a pipe coupling? A coupling (or coupler) (used in piping or plumbing) is a very short length of pipe or tube, with a socket at one or both ends that allows two pipes or tubes to be joined, welded (steel), brazed or soldered (copper, brass etc.) together. Alternatively it is a short length of pipe with two female National pipe threads (NPT) (in North American terms, a coupler is a double female while a nipple is double male) or two male or female British standard pipe threads. If the two ends of a coupling are different (e.g. one […]

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Long Radius Elbow VS Short Radius Elbow

In a piping system, an pipe elbow is a pipe fitting that changes the direction of the pipe. According to the angle, there are three most commonly used 45° and 90°180°, and other abnormal angle elbows such as 60° are also included according to engineering needs. Elbows are made of cast iron, stainless steel, alloy steel, malleable iron, carbon steel, non-ferrous metals and plastics. The way to connect to the pipe is: direct welding (the most common way) flange connection, hot melt connection, fused connection, threaded connection and socket connection. According to the production process, it can be divided into: […]

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Types of pipe connection

Pipe connection is varied, the commonly used have Butt weld, Flanged, Threaded, Socket weld, Glued, Brazed and Grooved end. You assign connection types in the Connector Properties dialog box as you build fittings content using the Content Builder (see Adding Connectors to a Parametric Fitting). Assigned connection types are then displayed on the Connection Assignments tab of the Pipe Layout Preferences dialog box. Unthreaded Connections are not threaded, must be either welded or bolted together.  The different orientations of pipe connection types: Butt welds: Butt welds are welds where two pieces of metal to be joined are in the same […]

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What are Steel Flanges?

What are Steel Flanges? Generally speaking, the steel flanges refer to the joints specially used for connecting pipes. For example, two steel pipes with a diameter of 100 can be connected by welding or electric welding. Once welded, it is not easy to disassemble unless it is cut by a cutter or Electric welding to cut open. However, if a flange (usually a round flange) is used, a gasket seal can be added and then fixed with a screw cap. It can also be easily disassembled when the pipeline fails or is overhauled. In addition, if there are flanges on both sides of the […]

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What is a petroleum pipeline?

What is a petroleum pipeline? The petroleum pipeline is composed of the oil pipe and its accessories, and is equipped with the corresponding oil pump unit according to the needs of the process flow. It is designed and installed as a complete pipeline system for completing the oil material loading and unloading and transportation tasks. The petroleum pipeline system, which is a pipeline system for transporting petroleum and petroleum products, is mainly composed of petroleum pipelines, oil stations and other auxiliary related equipment. It is one of the main equipments in the petroleum storage and operation industry, and is also […]

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