Q:How should we get to know the flange?

For example, such as a long distance transport pipeline, it is necessary to lower the pipes into the pipeline in the pipeline, but install valve, mirror, telescopic device and so on, which can be used in welding welded it up, but after the maintenance is not split off is not? Therefore, most of the pipeline will choose flange joint, so as to facilitate future maintenance and replacement.The flanges are soldered to one end or joined together in other ways, and the two opposite flanges are secured with fasteners (bolts), which form a complete conduit. Pipes and valves, mirrors and so on are basically connected in this way.

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:Dn is 250, Pn25 flange, what is the hole distance?

Flange center hole distance d1=370mmFlange diameter D=425Aperture 30Bolt M27

Q:Introduction of flange

Pipe flanges are flanges used for piping in pipe installations. They are used on equipment and refer to the entrance and exit flanges of the equipment. 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.

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

This is the American Standard. "6" means "DN150 11/4", which refers to "DN32", "11/2", "DN40", "" and "DN80"

Q:How do you calculate the size of the flange? How many inches do you calculate? What's the inside diameter or what?

According to the internal diameter, the diameter is 25.4 inches apart

Q:A metal pipe nominal diameter 1200, using flange connection. In the original installation technical requirement, "parallelism: tolerance is 1mm/1000mm". How do you measure parallelism? What does this "1mm/1000mm" mean? How do you explain that?Another: flange roughness and how to measure and explain??

Parallel degree should be marked that flange mounting flange gap when the maximum and minimum width difference, the difference is not too large, is on the corner of the bolt flange sealing, not partial, or in some places more pressure gasket, gasket in some places may be there virtual pressure, although it does not leak, long time might be have a problem,As for flatness, the surface finish of machined surface should be considered as the flange sealing surface can not be a flat surface, and must be opened with mortise or groove

Q:PROE flat sheet metal design whole wall and the flange wall what is the difference?

Very simple. The flat wall is the front face, and the flange wall is the side.Is not to say that the sheet metal is a relatively thick iron sheet, can be divided into surface and thickness, smooth surface from the surface is positive to see the past, is Affirmative or trapezoidal, and flange wall is in the thickness direction, is folded into a L shape or Z shape.

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 is the difference between this, and when what form of connection ah?

To clip type, general caliber is small, pressure is not big. Flanges are suitable for large bore, and others have been answered