• 2205 Duplex Stainless steel flange

2205 Duplex Stainless steel flange
Flange (Flange), also called flange flange disc or flange. The flange is a part connected between the shaft and the shaft, which is used for the connection between the pipe ends; It is also useful in the flange on the import and export of the equipment for the connection between two devices, such as the reducer flange. Flange connection or flange joint refers to a detachable connection which is connected by flanges, gaskets and bolts as a group of combined sealing structures. The pipe flange refers to the flange of the pipe distribution pipe in the pipe device, and the import and export flange of the equipment is used in the equipment. There are holes in the flange and bolts make the two flanges tightly connected. The flange is sealed with a gasket. Flanges are divided into threaded connection (thread connection) flanges, welded flanges and clamp flanges. Flanges are used in pairs, wire flanges can be used for low pressure pipes, and welded flanges for more than four kilograms of pressure. Put a gasket between the two flanges and fasten them with bolts. Different pressure flange thickness is different, they use different bolts. Pumps and valves, when connected with pipelines, the local parts of these equipment are also made into corresponding flange shapes, also known as flange connections. All the connecting parts that are connected by bolts around two planes and are closed at the same time are generally called "flanges", such as the connection of ventilation pipes, and this type of part can be called "flanged parts". But this connection is only a part of the equipment, such as the connection of the flange and the pump, it is not good to call the pump "flange parts". Relatively small such as valves, etc., can be called "flange parts".
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Product Nameweld neck flange, slip on flange, blind flange, tube sheet, threaded flange,socket weld flange, plate flange, spectacle blind, LWN, Orifice flange, anchor flange.(En1092-1 PN10 Pn16 DN900 DN750 Plate Steel Stainless Steel Flange)
OD15mm-6000mm
Pressure150#-2500#,PN0.6-PN400,5K-40K,API 2000-15000
StandardANSI B16.5,EN1092-1, SABA1123, JIS B2220, DIN, GOST,UNI,AS2129, API 6A, etc.
Wall thicknessSCH5S, SCH10S, SCH10, SCH40S,STD, XS, XXS, SCH20,SCH30,SCH40, SCH60,SCH80, SCH160, XXS and etc.
ApplicationPetrochemical industry;avation and aerospace industry;pharmaceutical industry;gas exhaust;power plant;ship building;water treatment,etc.
Advantagesready stock,faster delivery time;available in all sizes,customized;high quality

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Chemical Composition：

CSiMnCrNiMoSP
≤ 0.03≤1.0≤ 2.021.0～23.04.5～6.52.5～3.5≤ 0.02≤ 0.03

Mechanical Properties：

Tensile Strength Kb (MPa)Yield Strength σ0.2 (MPa)Elongation D5 (%)Hardness
≥620≥450≥25≤ 293HB

Physical Performance：

Density(g/cm³)Modulus of Elasticity(Gpa)Coefficient of Thermal Expansion(10-6/°C)Coefficient of Thermal Conductivity(W/m*K)Resistivity(ΜΩ. cm)
7.8819013.71980


Specification: 1/2 "~ 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[G20615-2009 (Calss series)]

Application: boiler pressure vessel, petroleum, chemical industry, shipbuilding, pharmaceutical, metallurgy, machinery, food and other industries.


Pressure vessel flange

Specifications: DN300~3000

Product Note: Pressure vessel flange Application industry: HVAC power building water supply pressure vessel accessories, pressure pipeline accessories.

Product category: Flange series

Application industries: HVAC, electricity, building water supply, pressure vessel fittings, pressure pipeline fittings.


Application technical parameter

Seal nominal pressure PN, MPa (bar) 0.6 1.0 1.6 2.5 4.0 6.4

Concave and convex surface (MFM) DN1300~3000 DN300~3000 DN400~2000 DN300~800

Tenon surface (TG) DN1300~3000 DN300~3000 DN300~3000 DN300~800

Full plane (FF) DN300~3000 DN300~3000 DN300~3000 DN300~800


Flat welded flange

The flat welded flange includes plate flat welded flange and neck flat welded flange.


Flat welded flange (PL)

The flat welded flange is suitable for the connection of steel pipe with nominal pressure not exceeding 2.5MPa. The sealing surface of the flat welded flange can be made of smooth type, concave and convex type and tenon type three. The application of smooth flat welded flange is the largest. It is mostly used in the case of moderate medium conditions, such as low-pressure unpurified compressed air and low-pressure circulating water.


Flat welded flange with neck (SO)

The neck height of flat welded flange with neck is low, which improves the stiffness and bearing capacity of the flange. Compared with the butt welding flange, the welding workload is large, the welding rod consumption is high, can not withstand high temperature and high pressure and repeated bending and temperature fluctuations, but the field installation is more convenient, can omit the weld patting and kneading process, and is more popular.


Neck Butt welding (WN)

Butt welded flange: Neck flange welding is often referred to as "high junction" flange. The aim is to transfer pressure in the pipe, thereby reducing the concentration of high stress in the flange. Neck flange welds are best designed for butt welds that offer flanges due to their inherent structural value. However, the price is relatively high, because the production process of the product is complex.


Threaded (threaded) flange: 

The threaded flange is connected with a thread. But the center of the product has a thread size corresponding to the pipe. Its main advantage is that it can be assembled without welding.

In addition, there are sliding flanges and lap flanges.


Socket welding Flange (SW)

Sealing surface form: protrudate (RF), concave and convex (MFM), mortise and groove (TG), ring joint (RJ)


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Material         Mainly201, 202, 304, 304L, 304H, 316, 316L,316Ti,2205, 330, 630, 660, 409L, 321, 310S, 410, 416, 410S, 430, 347H, 2Cr13, 3Cr13 etc
         300series:301,302,303,304,304L,309,309s,310,310S,316,316L,316Ti,317L,321,347
         200series:201,202,202cu,204400series:409,409L,410,420,430,431,439,440,441,444
         Others:2205,2507,2906,330,660,630,631,17-4ph,17-7ph, S318039 904L,etc
         Duplex stainless steel:S22053,S25073,S22253,S31803,S32205,S32304
         Special Stainless Steel:904L,347/347H,317/317L,316Ti,254Mo

According to the chemical (HG) industry standard: 

Integral flange (IF), threaded flange (Th), flat welded flange (PL), butt welded flange with neck (WN), flat welded flange with neck (SO), socket welded flange (SW), butt welded ring loose flange (PJ/SE), flat welded ring loose flange (PJ/RJ), lining flange cover (BL(S)), flange cover (BL)


According to the petrochemical (SH) industry standard: 

threaded flange (PT), butt welded flange (WN), flat welded flange (SO), socket welded flange (SW), loose sleeve flange (LJ), flange cover (not noted).


According to the mechanical (JB) industry standard: 

whole flange, butt welded flange, plate flat welded flange, butt welded ring plate loose sleeve flange, flat welded ring plate loose sleeve flange, flanging ring plate loose sleeve flange, flange cover.


According to the national (GB) standard: 

integral flange, threaded flange, butt welded flange, with neck flat welded flange, with neck socket welding flange, butt welded with neck loose sleeve flange, flat welded flange, butt welded ring plate loose sleeve flange, flat welded ring plate loose sleeve flange, flanged ring plate loose sleeve flange, flange cover.


Connection mode:

flange (flange) connection is the two pipes, fittings or equipment, first fixed in a flange flange, between the two flanges, plus flange pad, bolted together to complete the connection. Some pipe fittings and equipment have their own flanges, which are also flange connections. Flange connection is an important connection mode in pipeline construction. The flange connection is easy to use and can withstand greater pressure. In industrial pipes, in the home, the pipe diameter is small, and it is low pressure, and the flange connection is not visible. If you are in a boiler room or production site, there are flanged pipes and equipment everywhere.


According to the connection method, the type of flange connection can be divided into: plate flat welded flange, flat welded flange with neck, butt welded flange with neck, socket welded flange, threaded flange, flange cover, butt welded with neck ring loose flange, flat welded ring loose flange, ring groove flange and flange cover, large diameter flat flange, large diameter high neck flange, figure 8 blind plate, butt welded ring loose flange, etc

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