JIS vs ANSI flange
Japanese standard stainless steel flange is a Japanese standard flange. In China, this is the same as our marine model. Japanese standard stainless steel flange is marked with JIS. It can be divided into three types: (high 0.2-1.6mpa) flat type, (0.2-0.3mpa) flat type and (4.0-6.3mpa) tongue and groove type. Japanese standard stainless steel flange standard used
Japan’s standard flanges are generally used for flat welding flanges, but there is no difference because some materials may be different in appearance, which is different from domestic standards. It is divided into plane welding, butt welding and pole welding models. Materials are cast iron, cast iron and stainless steel. The product of Japanese standard flanges is ZG25II. the allowable temperatures and pressure are according to the standard CBM1022.
The round welding range of Japanese standard stainless steel flanges is from 0.5mpa to 6.3mpa. the pressure varies from low to high. In China, in turn, CBM1012-81 and CBM1019-81, as a signature.
Japanese standard stainless steel flanges also include flat welded steel flanges of unusual shapes. Welded parts can be 25 gauge steel. The center line of the inner diameter and bolt hole of the standard Japanese flange is set to be perpendicular to the sealing surface. The installation process of Japanese standard flanges is marked by JISB2222-1997. This is the same as our marine model CBM1013-81. The dimensions of the flange are the same. One thing to note is that there are some Japanese standard flanges with clamps. The outer diameter of DN90 etc. is 102MM, and it is said that this information cannot be used at all. The pressure of the Japanese standard flange is 3.0mpa, which is strange and not like the national or American standard.
American Standard flange is resistant to corrosion, acid and alkali resistance, long service life, etc. The calculation cost is reasonable, the surface is smooth, acid and alkali resistant and heat resistant, the calculation cost is reasonable, beautiful appearance and strong texture. performance American Standard flange in the actual use of the work process must be in accordance with certain standards and materials, according to the national standard management and use, used in various areas of the business, plays an important role in relationship and work. .
Use of American Standard flanges
Widely used in water conservancy, electric power, power plant, pipes, industry, high pressure vessel, etc.
American Standard flange connection is two pipes, pipe fittings or equipment, each connection is first in the flange, between the two flanges, except for the flange gasket, fixed together with bolts, made a complete connection. Some pipes and fittings already have their own flange, also a flange connection.
American Standard flange is divided into thread connection (wire connection) flange and welding flange. Low pressure small diameter has silk connection flange, high pressure and low pressure large diameter is used welded flange, different pressure flange thickness and connection bolt door diameter and number is different.
American Standard flange ANSI casting method.
1. die forging: steel materials in heat to 1200 ℃, and then cast into the standard mold. DN50-DN250 specifications need to use a special punch to punch holes in it.
2. Free forging: the product is heated to 1200 ℃ in a heating furnace, the square product is forged into a round cake, punched and spread to the required to become large with special items. DN300-DN3000 specifications refer to this method.
