Stainless Steel Flange Summary:
Flange is also called flange or flange. The flange is a part that connects the pipe to the pipe and is connected to the pipe end.
There are holes in the flange, and the bolts make the two flanges tightly connected. The flanges are sealed with gaskets. Flange threaded connection (wire connection) flange and welded flange.
Detailed introduction:
Flanges are disc-shaped parts that are most common in pipeline engineering. The flanges are used in pairs and with the matching flanges on the valve.
Use:
In plumbing, flanges are primarily used for pipe connections. In layman’s terms, the role of the flange is to secure and seal the joint of the pipe.
Installation method:
In the pipelines that need to be connected, a variety of flanges are installed, and the low-pressure pipelines can use wire-bonded flanges, and the welding flanges are used at pressures above 4 kg. A gasket is placed between the two flanges and then bolted. Different pressure flanges have different thicknesses and use different bolts.
Pumps and valves, when connected to the pipeline, part of these equipment, also made into the corresponding flange shape, also known as flange connection.
Connection parts that are closed at the same time by bolting on both planes are generally referred to as “flanges”. For example, the connection of ventilation ducts may be referred to as “flange parts”.
However, this connection is only a part of the equipment, such as the connection between the flange and the water pump, it is not good to call the pump “flange parts”. Smaller such as valves, etc., can be called “flange parts”.
Main effect:
1. Connect the pipeline and maintain the pipeline sealing performance;
2. It is convenient to replace a certain pipeline;
3. It is easy to open and inspect the pipeline;
4. It is convenient to close a certain pipeline.
Standard classification
Specifications: 1/2″ ~ 80″ (DN10-DN5000)
Pressure rating: 0.25Mpa ~ 250Mpa (150Lb ~ 2500Lb)
Common standards:
China standard: GB9112-88 (GB9113·1-88～GB9123·36-88)
American Standard: ANSI B16.5, ANSI 16.47 Class150, 300, 600, 900, 1500 (TH, LJ, SW)
Japanese standard: JIS 5K, 10K, 16K, 20K (PL, SO, BL)
German standard: DIN2527, 2543, 2545, 2566, 2572, 2573, 2576, 2631, 2632, 2633, 2634, 2638 (PL, SO, WN, BL, TH)
Italian standards: UNI2276, 2277, 2278, 6083, 6084, 6088, 6089, 2299, 2280, 2281, 2282, 2283 (PL, SO, WN, BL, TH)
British Standard: BS4504, 4506
Standards of the Ministry of Chemical Industry: HG5010-52~HG5028-58, HGJ44-91~HGJ65-91, HG20592-97 (HG20593-97~HG20614-97), HG20615-97 (HG20616-97~HG20635-97)
Ministry of Machinery Standard: JB81-59~JB86-59, JB/T79-94~JB/T86-94
Pressure vessel standard: JB1157-82~JB1160-82, NB/T47020-2012~NB/T47027-2012
Marine flange standard: GB/T11694-94, GB/T3766-1996, GB/T11693-94, GB10746-89, GB/T4450-1995, GB/T11693-94, GB573-65, GB2506-89, CBM1012-81 , CBM1013, etc.
Flange production standard
China Standard: GB/T9112-2010 (GB9113·1-2010～GB9123·4-2010)
Ministry of Chemical Industry Standard: HG5010-52～HG5028-58, HGJ44-91～HGJ65-91, HG20592-2009 Series, HG20615-2009 Series
Ministry of Machinery Standard: JB81-59~JB86-59, JB/T79-94~JB/T86-94, JB/T74-1994
Pressure vessel standard: JB1157-82~JB1160-82, JB4700-2000~JB4707-2000 B16.47A/B B16.39 B16.48
Stainless steel flange connection type
Plate type flat welding flange、neck flat welding flange、neck butt welding flange、 socket welding flange、 thread flange、flange cover、neck butt weld ring loose flange、 flat welding ring loose sleeve method Blue、ring groove flange and flange cover、 large diameter flat flange、large diameter high neck flange、butt weld ring loose flange、rotating flange、anchor flange、surfacing / welding flange
Stainless steel flange use precautions
1. In order to prevent the corrosion between the eyes due to the heating of the flange cover, the welding current should not be too large, about 20% less than the carbon steel electrode, the arc should not be too long, the layer is fast cold, and the narrow weld bead is suitable.
2. The electrode should be kept dry when used, titanium calcium type should be dried at 150 ° C for 1 hour, low a hydrogen type should be dried at 200-250 ° C for 1 hour (can not be repeated repeatedly, otherwise the skin is easy to crack and peel off), to prevent The electrode coating is sticky with oil and other dirt to prevent the weld from increasing the carbon content and affecting the quality of the weldment.
3. When welding stainless steel flanged pipe fittings, it is repeatedly heated to precipitate carbides, which reduces corrosion resistance and mechanical properties.
4. Chrome stainless steel flange pipe fittings after the hardening of the US standard flange is large, prone to cracks.
If welding of the same type of chrome stainless steel welding rod (G202, G207) is used, it is necessary to perform preheating at 300 °C or more and slow cooling at around 700 °C after welding. If the weldment cannot be post-weld heat treated, stainless steel flanged pipe welding rods (A107, A207) should be used.
5. Stainless steel flange, in order to improve corrosion resistance and weldability, appropriately increase the amount of stability elements Ti, Nb, Mo, etc., the weldability is better than the chrome stainless steel flange.
When using the same type of chrome stainless steel flanged electrode (G302, G307), preheating at 200 °C or higher and tempering at around 800 °C after welding should be carried out. If the weldment cannot be heat treated, stainless steel flanged pipe welding rods (A107, A207) should be used.
6. Stainless steel flange pipe fittings, butt welding flange welding rods have good corrosion resistance and oxidation resistance, widely used in chemical, fertilizer, petroleum, medical machinery manufacturing.
Stainless steel flange by JawaySteel
Jawaysteel can manufacture various kinds of stainless steel flange with different sealing surface such as FF, RF, LJ, FM, R.T.J ,R.J and so on . Besides, all kinds of standars such as GB,JIS,BS,DIN.ANSI can be available, we can also customize the size as per buyer’s specific requirement.
Grade and Quality:
ASTM A182 F304/304L, F316/316L, F321, F347, 316,316L,321 ,310S,904L,S31803,F51and so on.
Type:
Slip-on flanges, Blind flanges, Lap joint flanges, Welding neck flanges,Plate flange,Socket welding flanges and Treaded flanges.
Standard:
GB,JIS,BS,DIN.ANSI and Non standard.
Size range( can be customized)
1/8”,1/4”,3/8”,1/2”,3/4”,1”,1-1/4”,1-1/2”,2”,2-1/2”,3”,4”,6” etc.
Pressure ratings:
Class:150 300 400 600 900 1500 and 2500, Pn :6 10 16 25 40 64 and 160 ,5K-40K and so on
Sealing surface:
FF, RF, LJ, FM, R.T.J ,R.J and so on.
Application:
The stainless steel flange is widely used in connecting the pipeline in petroleum, chemical, power, gas, water, linepipe, heat exchanger, shipbuilding, construction etc.
Stainless steel flange by JawaySteel Products show
