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Difference between nipple, coupling and union

What is a Pipe Coupling? Pipe Coupling is a short tube, also called an outer joint; it is a commonly used accessory for industrial pipe connections. The forged coupling is formed by heating and forging with a steel ingot or a round bar, and then machined on the lathe to make the thread. The main manufacturing standards are ASME B16.11, BS 3799, and GB/T14383. How to buy pipe couplings How to buy pipe nipples How to buy pipe unions Types of Couplings Types of pipe nipples Types of pipe unions What is a Pipe Nipple What is a Pipe Union […]

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Process for connecting heat exchange tube and tube plate in shell and tube hea……

What is a shell and tube heat exchanger? Shell and tube heat exchangers are also known as tube and tube heat exchangers. The partition wall heat exchanger is a heat transfer surface which is closed on the wall surface of the tube bundle in the casing. The heat exchanger has a simple structure and reliable operation, can be manufactured by using various structural materials (mainly metal materials), can be used under high temperature and high pressure, and is the most widely used type at present. Structure And Type Types Of Shell And Tube Heat Exchangers Structure And Manufacturing Standard Process […]

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Difference between adapter, nipple and union

What is a Pipe Nipple? A pipe nipple is a length of straight pipe with male threads on both ends. It is one of the most popular category of pipe fittings. It is a connector or a coupling threaded on both ends. Pipe nipples are used to allow plumbing to be connected to a water heater or other plumbing. They are used to fit straight end hose or pipe. A combination of pipe nipples are recommended for low-pressure discharge and suction service for various compatible liquids and not for compressible products like air, nitrogen or steam. The working pressure of […]

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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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