Flanges classficication:
Integral pipe Flanges, Plate Flanges,High Neck flanges, Threaded flanges, Slip-on flanges, Socket welding flanges,Lap joint flanges, Welding neck flanges, Blind flanges, Orifice flanges, Reducing flange, Loose hubbed flanges, Welding plate flanges, and so on.
MATERIAL"
Carbon steel:
A105, Q235B, 20#,
ASTM A516 GR55,60,65,70
ASTM A694 F42,F52,F60, F62, F72
Alloy steel:
A182F11 CL1-CL3 12CrlMoV, a335p22
Stainless steel
ASTM A182 F304 304L, F316, 316L
2.Company profile
Cangzhou Mingtai pipeline equipment Co., Ltd was found in 2000 ,which is a branch of
cangzhou Bohai power pipe-fittings group Co., Ltd.
Products provided as elbow,tee, reducer,cap ; slip-on flange, blind flange, welding neck flange and steel pipe ,
which enjoy popularity in Iran, Iraq, Australia, Nigeria, Canada, the U.S., Britain,Germany,
the Netherlands, and many other countries.
As a special entity for Bohai group to accelerate the international development,Mingtai
integrates production,logistics,sales and export trade as a whole.
Currently, Mingtai has diversified mode of business operation such as self-support importing and exporting business,agent of import and export trade ,counter
trade and entrepot trade.
Cangzhou bohai power pipe fittings group co., ltd. is established in 1997,covering an
area of 100,000 square meters,with a workshop of 25,000suare meters and registered
capital of $3,000,000.
Our company has a strong staff team.
There are over 380 employees,including over 90 professionals and technicians.
Our company has established a scientific quality assurance system and already
granted the certificates of ISO9001:2000, PED and AD2000 as well as some other
important qualifications.
Flange (Flange), also known as flange flanges or flange. Flanges are connected to each other between the tube and pipe parts, the connection between the pipe end for; also useful equipment import and export on the flange for connection between the two devices, such as a gear flange. Flange connection or flange joint, is defined by flanges, gaskets and bolts of the three connected to each other as a group combinations detachable connection seal structure. Pipe flange means conduit means for piping flange, with import and export flange on equipment means equipment. There are holes on the flange, so that the two flange bolts tightly connected. Between flange sealing gasket. Threaded flange points (threaded connection) flanges, welded flanges and clip flange. Flanges are used in pairs, you can use low-pressure pipe thread flange, four kilograms more than the use of a pressure welding flanges. Between the two flange gaskets, then bolted. Different flange thickness at different pressures, they use different bolts. Pumps and valves, and pipe connections at local these facilities and equipment, also made of a shape corresponding to the flange, also known as the flange connection. Any use of the surrounding bolted in two planes simultaneously closed parts, generally known as the "flange", such as ventilation pipe connections, this type of parts can be called "flange parts." But this is only a partial connection device, such as flanges and pump connection, bad water pump called "flange parts." Relatively small, such as valves, etc., can be called "flange parts."
Reducer flange for connection to the motor and gearhead connection, as well as gear and other devices.
Flange (flange) connection is the two pipes, fittings or equipment, the first in a fixed each flange on, between two flanges, with flange pad, fastened together with bolts to complete the connection . Some fittings and equipment has been carrying flange, also belong to the flange connection. Flanged connections are important pipeline construction. Flanged easy to use, able to withstand greater pressure. In industrial pipe, using a wide range of flange connection. Within the family, the pipe diameter is small, and the low-pressure, invisible flange connection. If a boiler room or production site, full of flanged pipe and equipment.
1, according to the connection flange connection types can be divided into: plate flat welding flange, with neck flat welding flange, with neck flange, socket welding flange, threaded flange, flange cover with neck for welding ring loose flange, flat welding loose flange ring, ring groove flange and flange cover, large-diameter flat flanges, large diameter high-neck flange, blind character, loose flange welded ring, etc. .
XBH!
Found in 1997,Now ,has more than 6000 customers from all over the world. with 5 domestic branch,4 office, and 2 factories in china.
Factory covers an area of 10,000 square meters, and 600 workers.
Have certificate of ISO9001:2000, PED and AD2000 as well as some other important qualifications.
Welcome to visit factory at any time !
Specializing in the production of pipe fittings,flanges, Tee, Elbows, Reducers, Bend,Cross pipe,swage,weldolet,coupling,plug,Caps pipe, Blind flange.....
As iron welded flanges, the quality of many customers doubt is whether iron welded flanges than forged welding flanges. In fact, quality iron welding quality and forged flanges welded flange is the same, but in the end what iron welding flange can not secure it, which is iron welding flange material and least protected, because Usually the process, the density of iron welded flange is not a problem, but during the production process, welding iron flange blank rarely detected, so after it, produced it, not after detection of iron welding flange material is not guaranteed.
A gasket is capable of plastic deformation, and has a certain strength of the ring material. Most pads are cut down from the metal sheet, or by a professional factory according sized, the material is asbestos rubber sheet, asbestos sheet, PTFE sheet, polyethylene sheet and the like; it also uses a thin metal plate (white metal, stainless steel) will wrap up the non-metallic materials such as asbestos gasket made of metal package; there is a strip along winding spiral wound gasket made of thin steel and asbestos, the most commonly used is stainless steel and graphite entwined The spiral wound gasket, depending on the environment, it can be wrapped with asbestos. Ordinary rubber gaskets for temperature lower than 120 ºC of occasions; asbestos rubber gasket is suitable for steam temperature is below 450 ºC, for the oil temperature is below 350 ºC, the pressure is lower than 5MPa occasions, for general corrosion medium, most commonly used is the acid asbestos. In the high-pressure equipment and piping, copper, aluminum, steel on the 10th, the lens type or other shapes metal gasket made of stainless steel. Contact width of the sealing surface high pressure washer is very narrow (line contact), the gasket sealing surface and high finish machining.
Low pressure small diameter wire flange, high pressure and low pressure large diameter are using welding flange thickness and bolt diameter and the number of different connection flange pressures are different.
Product Name: Reducing flange
Technical parameters: in accordance with national standards
Quality standards: in strict accordance with the relevant standards formulated by the state manufacturing
Product Specifications: DN15-DN2000
Packaging: wooden or other
Color: metal color
Features: anti-corrosion, acid and alkali, long life, reasonable prices, smooth, acid and alkali, high temperature, appearance, texture and strong performance
Production process: professional overall forging, forging manufacturing, plate cutting system, plate rolling, etc.
Processing methods: high-precision CNC lathe, lathe finishing, welding and other processing
Nominal sch5s, sch10s, sch20s, sch30s, sch40s etc.
Manufacturing standards: GB, American standard, the Russian standard, Japanese standard, etc.
Material: 201,304.316.316L.0Cr18Ni9.321.202 etc.
Uses: Widely used in water conservancy, electricity, power plants, pipe fittings, industry, pressure vessels, etc.
Connection: flange nut, bolt connection.
Name: Stainless Steel Flanges English (Stainless steel flange)
Size: 1/2 "to 240" (10-6000)
Pressure rating: 0.6Mpa ~ 32Mpa, 150Lb ~ 2500Lb, PN0.25-PN42.0
Material: 304,304L, 321,316,316L, 310S and other materials
Ministry of Chemical Industry Standard: HG5010-52 ~ HG5028-58, HGJ44-91 ~ HGJ65-91, HG20592-2009 (PN series), HG20615-2009 (Calss series)
Applications: boilers, pressure vessels, petroleum, chemical, shipbuilding, pharmaceutical, metallurgy, machinery, food and other industries.
Product Name: Pressure vessel flange
Specifications: DN300 ~ 3000
Memo: pressure vessel flange Industry: HVAC Power building water supply pressure vessel fittings, pressure pipe fittings.
Category: Flanges
Industry: HVAC Power building water supply pressure vessel fittings, pressure pipe fittings.
Applications Technical Reference
Nominal seal PN, MPa (bar) 0.6 1.0 1.6 2.5 4.0 6.4
Convex surface (MFM) DN1300 ~ 3000 DN300 ~ 3000 DN400 ~ 2000 DN300 ~ 800
Tongue and groove (TG) DN1300 ~ 3000 DN300 ~ 3000 DN300 ~ 3000 DN300 ~ 800
The whole plane (FF) DN300 ~ 3000 DN300 ~ 3000 DN300 ~ 3000 DN300 ~ 800
Fold flat welding flange
Flat welding flange includes plate flat welding flange, with neck flat welding flange.
Plate flat welding flange (PL)
Flat welding flange for nominal pressure of not more than 2.5MPa pipe connection. Flat welding flange sealing surface can be made smooth style, bump-type and tenon slot three. Smooth application of the maximum level of welding flange. used for medium conditions are mild cases, such as low pressure non-compressed air purification, low circulating water.
With neck flat welding flange (SO)
With neck flat welding flange height of the lower neck, stiffness of the flange carrying capacity increased. Compared with welded flange, welding workload, electrode consumption is high, it can not withstand high temperature and pressure, and repeated bending and temperature fluctuations, but on-site installation more convenient, you can omit the step of weld rubbed film hurt more popular.
Weld neck (WN) Folding
Welded Flanges: Welding neck flange is generally referred to as "high-hub" flange. The aim is to divert pressure pipes, thereby reducing the high stress concentration in Frankie. Neck flanges butt welding is the best design that since the value of its inherent structural Flange. But the price is relatively high, because the complexity of the production technology.
Thread (thread) Flange: The threaded flange is threaded to connect. But the center of the tube products have corresponding thread size. Its main advantage is that it can not weld assembly.
Sliding flange: sliding flange has a lower hub because the pipe flange welded into the top single. It is welded inside and outside to provide sufficient strength to prevent leakage. Sliding flange, matching are bored slightly larger OD tubing. They are better than the neck flange welding, due to lower initial cost, a lot of users, but probably not the final installation costs than, less because of the increase in weld neck flanges.
Lap Flanges: in fact, exactly the same lap flange sliding flange, unless it is a radius between the hole and the flange race. This is necessary to accommodate the overlapping radius flange stub end. Typically, at the end of lap lap stub mating flanges and will be equipped with the system together.
The socket welding flange is similar to a sliding flange, unless it has a hole and anti-hole size. Match counter bore and the pipe to make the pipe inserted into the flange similar sliding flange. In the smaller hole diameter is the same as the ID matches the same pipe. Restriction orifice is built as a dedicated pipeline shoulder sleeve stays at the bottom. This eliminates any traffic restrictions in the use of socket welding flanges.
Socket weld flange (SW) Folding
Socket welding flange
Socket Welding Flange
Socket welding flange
Socket welding flange
Sealing surface form: raised face (RF), uneven surface (MFM), tongue and groove (TG), ring joint face (RJ)
Material: Carbon Steel (Carbon Steel): ASTM A105,20 #, Q235,16Mn, ASTM A350 LF1, LF2 CL1 / CL2, LF3 CL1 / CL2, ASTM A694 F42, F46, F48, F50, F52, F56, F60, F65 , F70;
Alloy Steel (Alloy Steel): ASTM A182 F1, F5a, F9, F11, F12, F22, F91, A182F12, A182F11,16MnR, Cr5Mo, 12Cr1MoV, 15CrMo, 12Cr2Mo1, A335P22, St45.8 / III, 35CrMoV, 45CrMo, etc.
Manufacturing standards: ANSI B16.5, GB / T9117.1-2000-GB / T9117.4-200 etc.
Threaded flange (TH) Folding
Threaded flange nominal diameter: DN8 ~ DN100 Working Pressure: 1.0 ~ 2.5 (MPa) plate threaded flange material: stainless steel, carbon steel, alloy steel.
Threaded flange Application: Suitable for fire, gas, hot water, air conditioning, air pipe, tubing, gauges, hydraulic pipes and other industrial and civilian pipe thread locking and sealing.
Flange cover (BL)
Flange cover, also known as blind flanges, intermediate flange without holes for pipes sealed with a plug. The type of sealing surface in the form of more, there are flat, convex, concave and convex surfaces, tongue and groove, ring joint face.
Sealing surface: plane (FF), raised face (RF), uneven surface (MFM), tongue and groove (TG), ring joint face (RJ)
Production materials:
Carbon Steel (Carbon Steel): ASTM A105,20 #, Q235,16Mn, ASTM A350 LF1, LF2 CL1 / CL2, LF3 CL1 / CL2, ASTM A694 F42, F46, F48, F50, F52, F56, F60, F65, F70 ;
Stainless steel (Stainess Steel): ASTM A182 F304,304L, F316,316L, 1Cr18Ni9Ti, 0Cr18Ni9Ti, 321,18-8;
Alloy Steel (Alloy Steel): ASTM A182 F1, F5a, F9, F11, F12, F22, F91, A182F12, A182F11,16MnR, Cr5Mo, 12Cr1MoV, 15CrMo, 12Cr2Mo1, A335P22, St45.8 / III.
Loose flange fold
Weld neck loose flange ring
Loose flange welded Loose ring flange welded ring with neck Loose plate flange with weld ring Loose plate flange plate over the loose flange In addition, to meet the needs of post-locking device, the rod section has holes, these holes can be affected by vibrations when the bolt is not to loose. some of the flange bolts not threaded rod to be meticulous, called the shank flange bolts. this bolt flange coupling by the variable force in favor of steel there are special high strength bolts on the structure. head will enlarge some dimensions have changed is the molten hot galvanized steel bar base metal and iron alloy layer reaction.
Flat welding ring loose flange (PJ / SE)
Flat welding flange Loose ring flange can be active sheet, generally supporting the water supply and drainage fittings (on expansion joints most common), expansion joints have a flange on both ends when manufacturers factory direct and Engineering pipes, equipment bolted. The purpose of using flat welding Loose ring flange is generally in order to save material, its structure is divided into two sections, tubes and pipes connected to one end portion, a head made of flanging, flange portion set on the flange. Flanges low grade material and partially used tubes and pipes of the same material, to achieve the purpose of saving material.
Flat welding ring loose flanges:
1, cost savings. When the pipe material particular, when the expensive, flange welding the same material cost is high.
2, is not easy or not easy to weld large processing or strength needed. Such as plastic pipe, glass pipe and the like.
3, ease of construction. When the connector flange bolt holes is not easy to find the corresponding positive or prevent future replacement of equipment flange bolt holes have changed and so on.
Flat welding ring loose flange disadvantages:
1, under pressure low.
2, solder ring at low intensity (especially when the thickness of 3mm or less)
Loose ring flange with weld production standards:
GB: GB / T9112-2000 (GB9113 · 1-2000 ~ GB9123 4-2000?)
American Standard: ANSI B16.5 Class150,300,600,900,1500 (WN, SO, BL, TH, LJ, SW)
Japanese standard: JIS 5K, 10K, 16K, 20K (PL, SO, BL, WN, TH, SW)
German standard: DIN2573,2572,2631,2576,2632,2633,2543,2634,2545 (PL, SO, WN, BL, TH)
Ministry of Chemical Industry Standard: HG5010-52 ~ HG5028-58, HGJ44-91 ~ HGJ65-91
Flange Standard: HG20592-2009 (PN series) \ HG20615-2009 (Calss series)
Machinery of the standard: JB81-59 ~ JB86-59, JB / T74-1994, JB / T79-94 ~ JB / T86-94
Pressure Vessel: JB4700-2000 ~ JB4707-2000, JB1157-82 ~ JB1160-82 B16.47A / B B16.39 B16.48
Ring groove flange and flange cover
Large-diameter flange plate
Large-diameter high-neck flange
Blind character
Loose flange welded ring 6
Rotating flange
Anchoring flange
Surfacing / cover welding flange
Marine lap welding steel flanges Standard: This standard applies to ship goods, marine engineering products. The main materials are: carbon steel, alloy steel, cold steel, stainless steel.
Forged flange connection is the two pipes, fittings or equipment, and forged flange connection is an important connection pipeline construction. Forged flange connections easy to use, able to withstand greater pressure. In industrial pipe, forged flanged use very extensive. Within the family, the pipe diameter is small, and the low-pressure, invisible flange stamping elbow connection. If a boiler room or production site, full of flanged pipe and equipment. Chromium content from 0.1% to 0.5% (forged flange generally free of chromium), the carbon content of 1.0% or less and forged flange high temperature forging manufacturing, some forged flange surface hardness (HRC) although You can reach ≥56 above (hardening layer, only about 15 mm), forged flange material because of its poor hardenability hardness of heart to only 30 degrees, under normal circumstances, is often used forged flange water quenching process.
Flange cover (flange protection connector)
High temperature flange sealing fold
Flange components often require high temperature high temperature sealing plane, if there is no good sealant additional pressure seal in a separate region, the influence of pressure, it will cause production inaccuracies or deformation, that is to say in a separate pressure zone in the pressure By leakage, requiring unscheduled repair. In the field of application of high-temperature flat seal preferably is Boke Si high-temperature sealant, specially formulated to keep its steam and inert in standard applications and high temperature gas turbine flange, so they can withstand hot air, steam, water, light fuel oil and lubricants, can be resistant to oil and gas. It is a one-component, paste sealants, industrial applications, high-quality sealing compound, suitable for smooth, flat sealing surfaces (butt joints) requires high temperature and pressure conditions. Use a knife or rubber spatula spread plaster painted in a dry surface. Since the sealing product will not solidify, but will slightly change its consistency, maintaining flexibility and elasticity, so there is no time requirement to use, the construction is completed can be put into operation immediately, without waiting. To repair the damage of high temperature sealing surface scratches, should cooperate Bo Kesi temperature F Series repair product
Standard pipe flanges on two main international system, namely the German DIN (including the former Soviet Union), represented by the European pipe flange system and the American ANSI pipe flanges as a representative of the Inter-American pipe flange system. In addition, there are Japanese JIS pipe flanges, but in the petrochemical unit generally used only for public works, and less influence in the world. Now countries flange Introduction in the following:
1, with Germany and the former Soviet Union as the representative of the European System of pipe flanges 2, Inter-American system of standard pipe flanges to ANSI B16.5 and ANSI B 16.47 represented 3, Britain and France of standard pipe flanges, each with two countries casing flanges.
In summary, the internationally accepted standard pipe flanges can be summed up in two different and not interchangeable flange system: a representative of Germany's European pipe flange system; the other is the US Representative American pipe flange system.
IOS7005-1 is a standard issued by the International Standards Organization in 1992, the standard is actually the United States and Germany, two series of pipe flanges merger of standard pipe flanges.
The production process is divided into forging, casting, cutting system, rolling four.
Casting and forging flange flange
Cast out of the flange, accurate blank shapes and sizes, small processing capacity, low cost, but there are casting defects (pores cracks inclusions.); Cast streamlined internal organization of poor (if it is cutting elements, streamlined worse);
Forging flange generally lower than the casting flange carbonaceous rust, forging streamline good, the organization is relatively compact, mechanical properties than cast flange;
Improper forging process also occurs large grains or uneven hardening crack phenomenon, forging costs than cast flange.
Casting forging ratio can withstand higher shear and tensile strength.
Casting advantage is that it can produce more complex shape, the cost is relatively low;
Forging advantage is that even within the organization, there is no casting porosity, inclusions and other harmful defects;
From the difference between the production process of casting and forging flange flange different, such as centrifugal casting flange belongs to a flange.
Centrifugal casting method of producing a precision flange flange, the more common kind of casting sand casting organization much fine, quality improved greatly, loose tissue, pores, less prone to problems such as trachoma.
First, we need to understand how to produce centrifugal flanges are made, centrifugal casting making welded flange process method and product, characterized in that the product has been processed by the following process steps:
selected raw steel into the melting furnace, the molten steel temperature reaches 1600-1700 ºC;
metal mold preheated to 800-900 ºC constant temperature;
start centrifuge, will step Step in molten steel into the preheated mold;
casting cooled to maintain the 800-900 ºC 1-10 minutes;
water cooled to near room temperature, remove the casting mold release.
We come to know flange forging production process:
Forging process generally consists of the following steps, namely select lower quality steel material, heating, forming, cooling after forging. The process of forging free forging methods, forging and mold forging. Production, according to the size of the forging quality, the number of forging choose different methods of production volume.
Free forging low productivity, large allowance, but the tool is simple, versatile big, it is widely used in forging the shape of a relatively simple one-piece, small batch production of forgings. Free air hammer forging equipment, steam - air hammer and hydraulic machines, respectively, for small, medium and large forgings production. Forging high productivity, simple operation, easy to implement mechanization and automation. Forging high dimensional accuracy and low mechanical allowance, forging a more reasonable distribution of fibrous tissue, can further improve the service life of the part.
The full name of the model forging forging, the blank is placed in a heated die forging fixed in the forging of the device.
More simply, better quality forged flanges, typically by forging production, fine crystal structure, high strength, and of course the price is expensive.
Whether it is casting flange or flange forged flanges are all common manufacturing methods, see the strength requirements required to use part of, if not ask, you can also use the system turning flange.
Since the flange has a good overall performance, it is widely used in chemical, construction, water supply, drainage, oil, light and heavy industrial, refrigeration, sanitation, plumbing, fire protection, electric power, aerospace, shipbuilding and other infrastructure projects.
