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What is a natural gas pipeline?

What is a natural gas pipeline? Natural gas pipeline refers to the pipeline that transports natural gas (including associated gas from oil field production) from the mining or treatment plant to the urban gas distribution center or industrial enterprise users, also known as gas pipeline. The use of natural gas pipelines to transport natural gas is a way of transporting large quantities of natural gas on land. Natural gas pipelines account for about half of the world’s pipelines. What is natural gas? Natural gas refers to all natural gases naturally occurring in nature, including gases formed by various natural processes […]

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What is a SSAW steel pipe?

What is a SSAW steel pipe? SSAW steel pipe is also known as the Spiral Submerged- Arc Welded Steel Pipe that is a type of spirally welded steel pipe produced by using the double-sided submerged arc welding method. Spiral welded pipes are formed using narrower plates or hot rolled coils, which lowers their production costs significantly. The spiral welding process permits the production of large-diameter pipes suitable for transporting large volumes of oil and gas. Traditional SSAW pipes were historically limited to low pressure applications; however, modern SSAW pipes have been used extensively in Russia, Canada, and Asian countries in high pressure gas […]

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The difference between spiral submerged arc welded steel pipe and straight sea……

Since the 1930s, with the rapid development of high-quality strip continuous rolling production and the advancement of welding and inspection technology, the quality of welded joints has been continuously improved, the variety specifications of welded steel pipes have been increasing, and more and more fields have replaced Seam steel pipe. Welded steel pipes are divided into straight welded pipes and spiral welded pipes in the form of welds. What is a spiral submerged arc welded steel pipe Production process of straight seam steel pipe Production process of spiral seam submerged arc welded steel pipe Spiral submerged arc welded steel pipe […]

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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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