Carbon steel flanges close and reliable. It has two sealing surface, and valve sealing surface material widely used kinds of plastic, sealing, and can be completely sealed. Because carbon steel flanges have to wiping in opening and closing process, it can be used for media with suspended solid particles. Model Q41F - 16C Q41F - 25C ASTM A105 about 0.9% (standard is 1.05Max with decreasing carbon content can to 1.65% Max) As GB 16Mn content in about 1.3% (standard 1.2% to 1.6%), JIS S25C then it is relatively low at 0.6%. Pumps and valves, and pipe connections at local these facilities and equipment, also made of a shape corresponding to the flange, also known as the flange connection. All in two planes using bolted connections at the same time in neighboring closed parts, generally known as the "flange", such as ventilation pipe connections, this type of parts can be called "flange parts." But this is only a partial connection device, such as flanges and pump connection, bad water pump called "flange parts." Relatively small, such as valves, etc., can be called "flange parts." A gasket is capable of plastic deformation, and has a certain strength of the ring material. Most pads are cut down from the metal sheet, or by a professional factory according sized, the material is asbestos rubber sheet, asbestos, polyethylene board; it also uses a thin metal plate (white metal, stainless steel) asbestos other non-metallic materials wrapped up clad gasket made; there is a band along winding spiral wound gasket made of thin steel and asbestos. Ordinary rubber gaskets for temperature lower than 120 ℃ of occasions; asbestos rubber gasket is suitable for steam temperature is below 450 ℃, for the oil temperature is below 350 ℃, the pressure is lower than 5MPa occasions, for general corrosion medium, most commonly used is the acid asbestos. In the high-pressure equipment and piping, copper, aluminum, steel No. 10, the lens type or other shapes metal gasket made of stainless steel. Contact width of the sealing surface high pressure washer is very narrow (line contact), the gasket sealing surface and high finish machining. Low pressure small diameter wire flange, high pressure and low pressure large diameter are using welding flange thickness and bolt diameter and the number of different connection flange pressures are different. Outside of work, happy. . . . . . Bob, you are not and fat? "" How do you do that? "" I do not look out, listen out ...... "" how to listen out? "" You just put the ass, had previously been 'porphyrin' sound these days is 'pop' sound, not the meat too crowded yet ...... "