• Corporate vision to become the pipeline industry Toyota
  • Corporate mission to enhance the quality level of Chinese manufacturing
  • Business goals domestic industry first
Attention should be paid to defects that may occur during pipeline steel pipe welding during production: 1.Bubble Bubbles mostly occur in the center of the weld, and hydrogen is still hidden in the form of bubbles inside the weld metal. The main reason is that the welding wire and flux have mois ...

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After heating, heat preservation and cooling, the performance of the metal will change differently, and the performance of the same flange pipe fittings will also be different after heating, such as the superior performance of stainless steel flange pipe fittings obtained by heating and cooling ...

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Heat treatment refers to a metal hot working process in which materials are heated, insulated and cooled in the solid state to obtain the expected microstructure and properties. Machine for heat treatment There are four basic processes for overall heat treatment of iron and steel: annealing, nor ...

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The heat treatment of pipe normally have five ways as below: 1.Quenching+high temperature tempering The steel pipe is heated to the quenching temperature, so that the internal structure of pipe can be transformed to austenite, then cooled faster than the cirtical quenching speed, so that the int ...

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After the metal is heated, insulated and cooled, the properties of the metal will change differently. After heating, the performance of the same flange pipe fitting will also be different. For example, stainless steel flanges have superior performance. The heating and cooling effects of pipe fit ...

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Hot dip galvanizing refers to melting zinc at high temperature and adding an appropriate amount of auxiliary materials to make a layer of zinc on the metal components. Cold galvanizing is a process of anti-corrosion treatment of workpiece surface based on electrochemical principle. Hot dip Galva ...

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The past several years we received many requirements about 3PE pipe. For this kind of pipe we are familiar with them because we have do many orders for our customers. 3PE pipe has three layer structure, the first layer of epoxy powder (FBE>100um), the second layer of adhesive (AD) 170 ~ 250um ...

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In recent days, we received an inquiry from a customer in Singapore, part of which are polyurethane coated steel pipes. The specific content is size: 6 “~10”, wall thicknes: SCH80, material: API 5L Gr. B, coating: polyurethane coating. Polyurethane coating is a common anticorrosive c ...

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There are various things based on which the performance of the fasteners varies, and having knowledge about all these things is very necessary. One of the main things that you should have knowledge about is the coating of the fasteners. The coating of the fastener determines the longevity and th ...

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Internal coating of the Pipes helps to enhance the corrosion resistance ability of pipes, improves the flow, and also helps to reduce deposit formation. There different types of pipe internal coating which our factory can do , such as Fusion Bonded Epoxy (FBE) Coating and Glass flake Coatings. I ...

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Recently ,we supplied a order for seamless pipe with 3PP coating to Iran clients,they will use these pipe on oil pipeline.The customer requires seamless steel pipes, the material is API 5L X52 PSL2, the standard is B36.10M, and the coating is 3PP coating. API 5L X52 PSL2 seamless pipe wih 3PP co ...

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FBE coating (fusion bonded epoxy, fusion bonded epoxy powder coating) is a one-part, thermosetting powder coating that provides pipeline from optimum corrosion protection in all environments – petrochemicals, gases, corrosive substances, saltwater, freshwater, wastewater, and more . FBE Coating ...

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First ,what’s the epoxy coating? Epoxy coating is a two-component self-drying coating composed of epoxy resin, various color pigments, wear-resistant fillers, additives and solvents as one part, and the other part is a special curing agent. Epoxy coating steel pipe with flange Second , wha ...

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Elbow is a fitting that changes the direction of a pipe run. According to the angle, there are three most commonly used elbows: 45 ° and 90 ° 180 °, and other abnormal angle elbows such as 60 ° are also included according to the needs of the project.(Welding method of large-size elbow) First, cu ...

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The so-called large-diameter elbow is a large-diameter high-pressure steel pipe connector used in high-pressure pipelines such as oil, gas and coal slurry transportation. The pipe diameter is more than 630mm. These pipelines usually bear a high pressure of more than 100MPa. Manual welding large ...

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Seamless elbow is manufactured by the seamless steel pipe, through hot push, press or extrusion processes, and there is no seam on the elbow body.Welded elbow small than DN600 is manufactured by welded steel pipe, is made in the same process as seamless elbow.But there is a welded seam on the el ...

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According to the production process, steel pipe can be divided into seamless steel pipe and welded steel pipe. What is the difference between seamless steel pipe and welded steel pipe? Different forming processes: seamless pipes are made of long steel cylinders. The engineer heated the cylinder ...

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DNV GL certification is the certification of det Norske Veritas, and DNV GL certification is an independent third-party organization. DNV GL, BV and ABS are called the three major classification societies. After Hebei Haihao Group obtained BV and ABS Type Approval certificate.In order to further ...

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1 SCOPE This standard covers the standardization of dimensions of welded and seamless wrought stainless steel pipe for high or low temperatures and pressures. The word pipe is used, as distinguished from tube, to apply to tubular products of dimensions commonly used for pipeline and piping syste ...

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SCOPE This Standard covers the standardization of dimensions of welded and seamless wrought steel pipe for high or low temperatures and pressures. The word pipe is used, as distinguished from tube, to apply to tubular products of dimensions commonly used for pipeline and piping systems. Pipe NPS ...

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1. SCOPE 1.1 This Standard Practice provides dimensions, tolerances, and markings for butt-welding fittings for low pressure, corrosion resistant applications. 1.2 This Standard Practice covers only fittings made for use with Schedule 5S or 10S pipe, for all NPS sizes listed in ASME B36.19M, exc ...

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1.1 This Marking system applies to valves, fittings, flanges and unions used in piping connections which include (but nare not limited to) flanged, soldered, brazed, threaded or welded joints. 1.2 These specified markings serve to identify the manufacturer, the rating designation,materials of co ...

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SCOPE 1.1 This specification covers factory-made, seamless and electric fusion-welded carbon and low-alloy steel, butt-welding fittings for use in high pressure gas and oil transmission and distribution systems, including pipelines, compressor stations, metering and regulating stations, and main ...

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At the 1994 meeting of Subcommittee F, the project to develop a standard was accepted. Through the cooperation of producers and users familiar with the process, and with approval by the Standards Committee and ASME, ASME B16.49-2000 received approval as an American National Standard on April 25, ...

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