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Butt Welding Flange
1. Long neck butt welding flange is highly durable and resistant to deformation.
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2. Butt Welding Flange provides a reliable seal, making it suitable for pipelines with pressure or temperature fluctuations.
3. This flange is ideal for high temperature, high pressure, and low temperature pipelines. -
Long Neck Butt Weld Flange
I. product introduction
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Long neck butt welding flange is not easy to deformation, sealed, widely used, suitable for pressure or temperature fluctuations of the pipeline or high temperature, high pressure and low temperature pipeline, the advantage is the price is relatively cheap, nominal pressure not more than 2.5MPa; Also used for conveying expensive, flammable, explosive medium pipeline, nominal pressure in PN16MPa or so.
Ii. Product parameters
Specification: DN500 pn 1.0m (convex)
Dimensions: od 640* id 500* thickness 44*
Height 106 24 holes 23 material:
Iii. Product advantages
Pressure vessel long neck butt welding flange JB/T4703-2000 is suitable for the pressure of 0.25-1.6 mpa, the working temperature is higher than 20 ~ 300 ° c steel pressure vessel, the connection is not easy to deformation, good sealing effect, wide application, apply to the temperature or pressure fluctuate dramatically pipe or high temperature, high pressure and low temperature pipes, also used for conveying expensive medium, flammable and explosive medium, toxic gas pipeline. Company can according to the international and domestic various standard (American standard series >. > Germany standard series. Series British standard >, Japan series standards >, the Italian standard, countries such as Australia and China standard standard) the production of various materials (carbon steel, alloy steel/high, low temperature steel, stainless steel/containing dual phase steel, etc.) of forging steel flanges, products have been applied in petrochemical industry, power (nuclear power, wind power and thermal power), light industry, machinery, metallurgy and shipbuilding and other fields.
Long neck butt welding flange (LWN) : it is actually an expanded form of butt welding flange with neck. Flange neck slightly straight cylinder type, neck height should be 229mm (≤DN100) or 305mm (> DN100). Flange neck does not process groove, groove processing can refer to the relevant requirements of hg20615-2009 related standards and customer consultation. Long neck flanges are often used in the CLASS series of pipe flanges. When the pipe flanges with nominal size less than or equal to DN50 are matched with the cylinder body, the use of long neck flanges can also avoid the welding difficulties caused by too thin wall thickness of the neck end of the flange. -
Socket Welding Flange
Socket welding flange
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I. product introduction
Socket welding flange refers to the pipe end inserted into the flange ring ladder, the pipe end and the outside of the welding flange. There are two kinds of neck and no neck. With good rigidity of neck flange, small welding deformation, good sealing, can be used for pressure of 1.0~ 10.0mpa occasions. Container type b flange is also a socket welding flange, used for sealing occasions with higher requirements. When designing, socket welding flange can be checked according to the integral flange.
Ii. Product parameters
Iii. Product advantages
It is widely used in petroleum, chemical, natural gas, gas, textile, hydraulic, electric heating, military equipment, decoration, construction and other long-distance transmission pipelines and petrochemical enterprise process pipe network, urban central heating pipe network, gas pipe network and other engineering industries. This kind of flange is an important connection way in pipeline construction, mainly connecting the pipe and the bridge between the pipe, mainly fixing two pipes, pipe fittings or implement on a flange plate first, and then adding flange pad between the two flanges, fastening them together with bolts, so the connection is completed.
The main processing mode is high-precision CNC lathe turning, finishing lathe, argon arc welding and other processing, socket welding flange: often used in PN≤ 10.0mpa, DN≤40 pipeline; -
Pressure Vessel Flange
Pressure vessel flange
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I. product introduction
Pressure vessel is the most widely used equipment and one of the main production tools in petrochemical industry. Due to the process requirements and the installation and maintenance of equipment inner parts, pressure vessels often need to set up the container flange (such as the common shell heat exchanger, reactor, tower, filter, etc.). Pressure vessel flanges are divided into integral flanges, looped flanges and optional flanges according to the connection of flange rings. China's most commonly used JB/T4701 -- 4703 standard pressure vessel flanges have three types: a flat welding flanges, b flat welding flanges and long neck butt welding flanges, of which a, b flat welding flanges are arbitrary type flanges.
Ii. Product parameters
Specification: 12-3000
Application industry: hvac power buildings water supply pressure vessel accessories, pressure pipe accessories.
Product category: flange series
Application industry: hvac power building water supply pressure vessel accessories, pressure pipe accessories.
Iii. Product advantages
High temperature resistance, corrosion resistance, leakage prevention, easy to repair, with good comprehensive performance. Flanges and their gaskets and fasteners are collectively referred to as flange joints. Flange joints are widely used and widely involved parts in engineering design, and they are also the key parts prone to problems in engineering design and use. Flange joint design is one of the important contents of pressure vessel design. In the selection of standard a flange and calculation of non-standard a flange, designers choose the material unreasonable phenomenon is more serious, the use of b flat welding flange or even long neck butt welding flange instead of a flat welding flange situation is more, causing unnecessary waste. Therefore, it is necessary to discuss the selection and calculation of common type a flat welding flange. Application industry: hvac power building water supply pressure vessel accessories, -
Flat Welding Flan
portant role in the industrial use.Flush welded flange
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I. product introduction
Flat welding flange is a kind of flange which is connected with the container or pipeline by fillet weld. Optional flange. Design according to the flange ring and straight cylinder section of the integrity of the connection, according to the integral or loose flange check. Flanged rings are available with and without neck. Compared with the neck butt welding flange, the flat welding flange is simple in structure and saves in material, but its rigidity and tightness are not as good as that of the neck butt welding flange. Flat welded flanges are widely used for connecting medium and low pressure vessels and pipelines.
Ii. Product parameters
1). Flange outer diameter: 75mm-2190mm
(2) center circle diameter of bolt hole: 50mm-- 2130mm
(3) diameter of bolt hole: 11mm-30mm
(4) number of bolt holes: 4-48
(5) thread: m10-m27
(6) flange thickness: 12mm-58mm
(7). Pipe outer diameter: A(17.2-2032mm) B(14-2020mm)
Flange inner diameter: A(18-2036mm) B(15-2024mm)
Iii. Product advantages
The flat welding flange is suitable for the pipeline system where the pressure level is relatively low and the pressure fluctuation, vibration and oscillation are not serious. The advantages of the flat welding flange in the welding assembly of the flat welding flange is easier to align, and the price is cheaper, so it has been widely used. Beautiful appearance, smooth surface, acid and alkali resistance, anti-corrosion, strong texture performance. Oxygen furnace material opening, integral forging or finished forging cutting molding processing methods high-precision CNC lathe turning, CNC rocker drill drilling
The flat welding flange not only saves space and weight, but also ensures that the joint will not leak and has good sealing performance. As the required pressure decreases, the size and number of bolts can be reduced accordingly, so a new product with small size and light weight (70% ~ 80% less weight than the traditional flange) is finally designed. Therefore, the flat welded flange is a kind of high quality flange product, which reduces the quality and space and plays an im -
Blind Flange
Flange blind plate
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I. product introduction
Flange flange, also known as blind flange, real name blind flange. Is a form of connection for flanges. It's a flange without a hole in the middle. One of its functions is to seal up the end of the pipe, and the other is to facilitate the removal of debris in the pipe during maintenance. In terms of sealing effect, it has the same effect as the head and the cap. But there is no way to remove the head, and the flange blind plate is fixed with bolts, it is very convenient to remove. Flange blind plate material has carbon steel, alloy steel, stainless steel, plastic and so on.
Ii. Product parameters
Iii. Product advantages
Flange blind plate is mainly used to completely isolate the production medium to prevent the production from being affected or even causing accidents due to the loose closing of the cut-off valve. Flange blind plate should be set in the place where isolation is required, such as the device nozzle, before and after the cut-off valve or between two flanges. Insert plate (round blind plate) can be used for pressing, blowing and other disposable parts. The function is the same as that of the head and cap, except that the blind seal is a detachable seal and the head seal is not ready to be opened again. There are many types of sealing surface, including plane, convex surface, concave and convex surface, tenon groove surface and ring connecting surface. Materials are carbon steel, stainless steel, alloy steel, copper, aluminum, PVC and PPR. Production process is generally divided into four: forging, casting, plate cutting, casting. Among them, forging products have the highest price, followed by medium plate and the lowest casting and forging. Casting is the most secondary process. And the quality is forging and medium plate of good, cast forging of want a little bit poorer.
When the device is multi-series, the external main pipeline from the boundary area is divided into several sub-channels into each series, and the blind plate flange is arranged at the cut-off valve of each sub-channel. When the process pipeline of charging pipeline and replacement gas pipeline (such as nitrogen pipeline and compressed air pipeline) is connected with the equipment, the blind plate flange shall be set at the cut-off valve. The exhaust pipe, drain pipe and sampling pipe of equipment and pipeline shall be equipped with blind flange or wire plug behind the valve. Non-toxic, non-hazardous and non-explosive materials are excluded.
When the device is constructed in stages, when the interconnecting device is constructed in stages, the connecting pipeline shall set the blind flange at the cut-off valve to facilitate the subsequent construction. When the device is in normal production, for some auxiliary pipelines that need to be cut off completely, blind plate system pipeline should be set and blind plate flange should be set at the cut off valve to facilitate the subsequent construction. -
Threaded Flange
Threaded flange
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I. product introduction
Threaded flange is a kind of flange connected with pipe by thread. When designing, it can be handled according to loose flange. The advantage is that there is no need for welding and the additional torque on the cylinder or pipe when the flange is deformed is very small. The disadvantage is the flange thickness is big, the cost is high. Suitable for connection of high pressure pipeline.
Ii. Product parameters
The size of flange required for installation of different machines is not the same. For this reason, the country in order to unify the standard, determined the standard size of the threaded flange, for different specifications of facilities can be equipped with different sizes of threaded flange. Our country to the regulation of threaded flange includes to its specification, form, dimension parameter made regulation: inside diameter is 48 to 408.6 millimeter differ, range is wider, also accord with the condition that is used extensively so.
Generally, the flange outer diameter is 50-840, and the bolt thickness is 14-52, and the bolt hole spacing is 4-36.
Iii. Product advantages
Threaded flange is the inner hole of the flange is processed into pipe threads and connected with the pipe with threads. It is a kind of non-welded flange. Compared with the flat welding flange or butt welding flange, the threaded flange has the characteristics of easy installation and maintenance. Alloy steel flanges have sufficient strength but are not easy to weld or have poor welding performance.
Threaded flanges can also be selected, but in the pipeline temperature changes sharply or the temperature is higher than 260℃ and lower than -45℃, it is recommended not to use threaded flanges to avoid leakage. -
Carbon Steel Flange
Carbon steel flange
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I. product introduction
Carbon steel flange, that is, the body material for carbon steel flange or end flange connection. Which contains carbon steel material flange, known as carbon steel flange. Common materials are cast carbon steel WCB, forging A105, or Q235B, A3, 10#, 20 steel, 16 manganese, 45 steel, Q345B, etc.
Ii. Product parameters
Model Q41F - 16 c Q41F - 25 c
The American standard A105 is about 0.9% (the standard is that 1.05Max can reach 1.65%Max with the decrease of carbon content). The content of 16Mn in the national standard is about 1.3% (the standard is 1.2% ~ 1.6%), and the content of daily standard S25C is lower than 0.6%.
Iii. Product advantages
Production process has forging, casting, plate rolling system, plate cutting system and so on. Among them forging price is the highest, medium plate product is the second, casting product is the lowest. In terms of quality, the best is forged, the second is rolled and the third is cast. But the forging diameter is generally small.
Another layer of carbon steel flange means: According to the national standard size, the tolerance range, such as the production of flange, apart from not according to the standard size production of flange piece also said two standard flange (someone called non-standard flange is not correct), usually some unscrupulous merchants will reduce two flange thickness, diameter size to achieve the purpose of saving material, and made from scrap steel and scrap steel flange, is usually the steel chemical composition and mechanical properties of substandard waste, moreover steelmaking production flange with black steel private, the private steel steelmaking technology using old, there is no guarantee that the mechanical properties and welding performance, use which may not be able to and steel pipe welding, Or the steel itself has cracks, pores, and so on after welding will leak. So choose carbon steel flange when buying flange plate as far as possible.
Carbon steel flanges are compact and reliable. It has two sealing surface, and the ball valve sealing surface materials are widely used in a variety of plastics, good sealing, can achieve complete sealing. Carbon steel flange can be used in medium with suspended solid particles because of its wiping property during opening and closing. -
Alloy Steel Flange
Alloy steel flange is different from the common 20#, Q235 carbon steel flange, mainly used for special characteristics of pipelines and pipelines, more used for high temperature and high pressure position.Its common materials are 12Cr1MoV, 15CrMo, P91, P22, 10CrMo910 and so on.Alloy steel flanges can be divided into national standards (ministry of chemical industry standards, petroleum standards, power standards), American standards, German standards, Japanese standards, Russian standards and so on.Alloy steel flange of main resources and main application parameters are as follows: alloy steel flange of the reference standard, alloy welding neck flange manufacturing method choice, chemical composition analysis, mechanical performance, corrosion performance of detection, the main method of heat treatment, the tensile and hardness tests, alloy for the welding process in the process of installation.
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Alloy steel flange is one of the most widely used parts in petrochemical industry and is an important pipeline equipment in petrochemical industry.Butt welded flanges are used in pressure vessels and cryogenic vessels because of their excellent compressive stress and low temperature resistance.Alloy flanges have been used in chemical pipelines because of their corrosion resistance and oxidation resistance.In addition, by changing the content of chromium in alloy steel flanges and adding other alloying elements, it can also be used in ships, offshore oil exploration, aviation lights.
