Q:What are the application technologies of welding flanges?

First, the level of welding flanges and their technical requirements shall comply with the corresponding requirements of JB4726-4728. 1, nominal pressure PN for 0.25MP-1.0MPa carbon steel, austenitic stainless steel forgings, allowing the use of grade I forgings. 2, in addition to the following provisions, the nominal pressure of PN 1.6MPa-6.3MPa forgings shall meet the requirements of secondary or secondary forgings. 3, in line with one of the following conditions, and shall comply with the requirements of forging III: (1) PN = 10.0MPa nominal pressure flange forgings; (2) the nominal pressure PN>4.0MPa chrome molybdenum steel forgings; (3) PN>1.6MPa nominal pressure and the working temperature is less than or equal to -20 degrees Celsius ferritic steel forgings.

Q:What is flange? Why is it called flange?

The flange is lined with bolts to secure the two flanges. Gaskets for gaskets between flanges. Sub threaded flange connection (threaded connection), flange welding flange and flange clamp. Flanges are used in pairs. Low pressure pipes can be made of wire flanges and welded flanges with pressures of more than four kilograms. Add a gasket between the two flanges and secure with bolts. Different pressure flange thickness is different, they use the bolt is also different. Water pump and valve, and in the pipe connection, these equipment parts of the equipment also made corresponding flange shape, also known as flange connection. Any connecting parts that are bolted and closed in the vicinity of the two planes are generally referred to as flanges, such as the connections of the ventilation ducts, which can be called flanges". However, this connection is only part of a device, such as flanges and pumps connected, it is not good to call the water pump flange parts". Relatively small, such as valves, can be called flanges".

Q:Oil seal flange

Flange sealing surface of the three types: planar sealing surface for the pressure is not high, medium non-toxic occasions; uneven sealing surface, suitable for higher pressure situations; the sealing surface of the tenon, suitable for flammable and explosive, toxic medium and high pressure situations. A gasket is a ring made of a material that produces plastic deformation and has a definite strength. Most from the non metal plate gasket is cut down, or by professional plant size, the material for the asbestos rubber sheet, asbestos board, polyethylene plate; also useful thin metal plate (Bai Tiepi, stainless steel) asbestos nonmetal materials such as wrapping made of metal gasket; and a belt around and asbestos tape made of thin steel and the spiral wound gasket. The ordinary rubber gasket for temperature lower than 120 DEG C; asbestos rubber gasket is suitable for steam temperature lower than 450 DEG C, the oil temperature is below 350 DEG C, the pressure is lower than the 5MPa of the occasion, for general corrosive medium, is the most commonly used acid asbestos board. In high-pressure equipment and piping, copper or aluminum, steel 10, stainless steel lens or other shapes of metal gasket. The contact width of the high pressure gasket and the sealing surface is very narrow (line contact), and the sealing surface and the gasket have higher processing finish. Flange, threaded connection (wire), flange and welding flange. Low pressure small diameter wire connecting flange, high pressure and low pressure big diameter all use welding flange, different pressure flange thickness and connection bolt diameter and quantity are different. According to the different grades of pressure, the flange pad also has different materials, from low pressure asbestos pad, high pressure asbestos pad to metal pad. 1. to classified material of carbon steel, cast steel, alloy steel, stainless steel, copper, plastic, Aluminum Alloy, argon Ge Lek, PPC etc..

Q:Flange, flange, blind plate, the name of such a table, what exactly contains what I do not understand.

It includes flange plate, clamp, gasket, connecting bolt, nut and joint.

Q:There are 32; 3, 11/2, and so on, please master pointing, by the way, such tagging is based on what standards.

These refer to flanges,The 6 refers to DN150, 11/4 to DN32, 3 DN80, 2 DN50, 11/2 refers to the DN40 standard, American Standard so marked

Q:Flange specification PL80-1.6RF

RF is the code for sealing form, is the process of meaning.

Q:What is the maximum pressure of the flanges RF and RTJ?

General toxic medium, are not recommended to use an ordinary plane flange and flange flange should choose picture, concave and convex surfaces or the sealing performance is better than the. ??For toxic media, as long as it is not extremely dangerous, the pressure grade <=1.6MPa, you can generally use the convex surface RF flange, 2.5MPa start, generally need to use concave convex flange. For extremely hazardous media, recessed flanges shall be used.

Q:What's the difference between RF flange and RJ flange?

The difference between the RF flange and the RJ flange is that the seal is different.RF flange is a face seal surfaceRJ flange is ring connection sealing surface

Q:What are the common materials and grades of aluminum alloy flanges?

Aluminum alloy flange common material grade: 6061 aluminum flange, 6060-T6 aluminum flange, 5083 aluminum flange, 5083-H18 aluminum flange, 1060 Aluminum flange, 6060 aluminum flange and so on.The aluminum in the aluminium alloy flange is silvery white and light metal. Malleable; an oxide film that prevents metal corrosion in moist air. Aluminum powder and aluminum foil heated in the air can burn violently and give a dazzling white flame. Soluble in dilute sulfuric acid, nitric acid, hydrochloric acid, sodium hydroxide and potassium hydroxide solution, insoluble in water. Relative density 2.70.

Q:there is a pair of flange drawings, the above mark is 6-M12 evenly distributed 23 drill 24, what is the specific meaning?

Matching flange, tapping a face is threaded M23, and its matching flange is bolt free access, that is, the smooth surface, must be 24 diameter. Otherwise, it can't be tightened.