Q:What is the difference between the HG/T20615-2009 flange standard and the ASME B16.5 flange standard?

The size of HG/T20615-2009 and the ASME basic B16.5 agreement, is China standard in American Standard standard, and ASME is also the basic material.

Q:Are flanges and bushings the same thing?

Flanges and bushings are not the same thing.Turn left and turn right |Flanges (Flange), also called flanges, flanges, or flanges. A flange is a part that is connected between the pipe and the pipe, used for the connection between the ends of the pipe. It is also used for the flange on the entrance and exit of the equipment. It is used for the connection between the two devices, such as the reducer flange. Flange connection or flange joint means that the flange, the shim and the bolt are mutually connected as a group of three detachable sealing structures. 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. 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".The sleeve is a cylindrical mechanical part that is attached to the shaft. It is a part of the sliding bearing.Generally speaking, the axle sleeve and the bearing seat adopt the interference fit, and the shaft and the gap fit.

Q:Why is there only one gasket between the two flanges?

You haven't studied physics? Two words, the middle can be said that the friction is zero, this to force analysis, used differential, that is, for you to say so, put too much, it is not clamped tight, no matter how much power is not tightly clamped.

Q:The choice of flanges for the European system and the American system

Chemical flange specification must specify flange specification numberIn our country, the important use is chemical flange specification HG. As a result of the two set system, namely the European system and the American system. The flange specification number is different. As these two sets of system flange size is different, so the same as the chemical flange specifications HG, but it will not match, only to specify the chemical flange specifications, in order to ensure that each other correctly.The usability of flange under different pressure levels is discussedIf you use the different specifications of each country, you must also specify the flange specifications. In practice, through careful comparison, each standard system is different, such as chemical flange, European system, flange in DN less than 100, in the same DN, its flange diameter, screw number and size the same. Therefore, it can be used for automatic control specialty. If the project to PN=1.6Mpa, and the instrument marked is PN=2.0Mpa, if it is chemical flange HG20592-97 European system, only pressure grade allowed, it can match the whole.Chemical flanges specification American system CLASS 150 and CLASS 300 have no versatilityAfter careful comparison, the chemical flange specification American system 5.0Mpa (ie CLASS 150 and CLASS 300) below the pressure level is not universal, and this is different from the European system, use should pay attention to. This data is provided free of charge by Jiangsu Jinhu Ott Automation Instrument Factory

Q:Why is the nominal diameter of the flange inconsistent with the tube?

The nominal diameter of the 1. flanges does not mean any flange nominal diameter, but only the specifications of the flange. Refer to flange standard for specific dimensions. For example, DN100 does not mean that the flange diameter is 100, depending on the flange pressure, the specific size of the standard.2. nominal diameter of the pipe does not mean the specific size, the specific size should be based on the pipe number, check the standard.3.DN: dimensional identification of combinations of letters and numbers used in piping system components. It consists of letters DN and followed by dimensionless integer numbers, which are directly related to characteristic sizes such as the aperture or outer diameter (expressed in mm) of an end connector.Note 1: unless otherwise specified in the relevant standards, the figures behind the letter DN do not represent measurements or are used for computational purposes.Note 2: the standards used in the DN marking system shall give the relation between the DN and the size of the pipe element, such as DN/OD or DN/ID.

Q:What flanges are used for the valve flanges of natural gas pipelines?

Flange, flange and process

Q:In the industrial pipeline engineering 2.5MPa, to install 1 pay with blind flange of steel flange DN100 (ARC), the installation fee is?This is the 2011 national installation cost selection question. A.18.3 B.21.96 C.25.01 D.31.72

BMedium pressure flange, perform low-pressure corresponding quota by a factor of 1.2Flange installation, in the calculation of the piece, the flange installation fixed by 0.61 timesApply quota 8-1471; installation fee =30*1.2*.61=21.96

Q:How much is the flange 800Ib equal to MPa? How is it converted?

Concept error, 800LB is the flange pressure grade, not to say that the flange can withstand the pressure of 800lb. To know the use of flange pressure, flange must be combined with the material, the use of temperature to check the flange standards, in order to find the maximum working pressureYou can check HG/T 205922009

Q:How big flanges are seamless steel tubes with a diameter of 198? I checked the flange of GB9119-2010 and DN200. The minimum inner diameter is 222, which is much larger than that of my steel tube, so it can not be welded.Are there any other standard flanges to match?If there is no standard flange, what should I do to make my steel pipe welded with the national standard flange?

If the number of large, suggest you give manufacturers drawings, if not the number, I suggest you buy the DN200 welding flange when the flange with.

Q:The material of the flange is 20#. What does that mean?

There are many kinds of steel. You are using No. 20 steel