51 steel pipe network to share: What are the sizes of seamless steel pipe

The nominal diameter of the pipe and its inner diameter, outer diameter are not equal, for example: the nominal diameter of 100MM seamless steel pipe post 102 * 5, 108 * 5 and so on several, 108 for the pipe diameter, 5 indicates the pipe wall thickness Therefore, the inner diameter of the steel pipe is (108 * 5-5) = 98MM, but it is not exactly equal to the difference between the outer diameter of the steel pipe and the thickness of the pipe twice the thickness. It can also be said that the nominal diameter is close to the inner diameter but not equal to the inner diameter Of a pipe diameter specification name, the design drawings so use the nominal diameter, the purpose is to determine the nominal diameter of pipe, fittings, valves, flanges, gaskets and other structural dimensions and connection dimensions, the nominal diameter of the symbol DN Said that if the drawings used in the outer diameter, it should also make a pipeline specification table, indicating the nominal diameter of a pipe, wall thickness. Pipe series of standard pressure pipe design and construction, first consider the selection of pressure pipe and its components standard series. Although many standard systems applied in various countries in the world can be divided into two broad categories. Pressure pipe standards in Table 3. Flange standard pressure pipe Standard classification Large diameter series Small diameter series Specification DN- Nominal diameter Ð¤- Outer diameter DN15-Ñ„22mm, DN20- Ñ„27mmDN25-Ñ„34mm, DN32- Ñ„42mmDN40-Ñ„48mm, DN50- Ñ„60mmDN65-Ñ„76 (73) mm, DN80-Ñ„89mmDN100-Ñ„114mm, DN125-Ñ„140mmDN150-Ñ„168mm, DN200-Ñ„219mmDN250-Ñ„273mm, DN300-Ñ„324mmDN350-Ñ„360mm, DN400-Ñ„406mmDN450-Ñ„457mm, DN500-Ñ„508mmDN600-Ñ„457mm, Ñ„45mm, DN50-Ñ„57mmDN65-Ñ„73mm, DN80-Ñ„89mmDN100-Ñ„108mm, DN125-Ñ„133mmDN150-Ñ„159mm, DN200-Ñ„219mmDN250-Ñ„273mm, DN300-Ñ„325mmDN350-Ñ„377mm, DN400-Ñ„426mm

Flap Disc Backing Pad

Fiberglass Backing Pad is mainly used for making flap discs, Clean And Strip Disc, wool felt disc, non woven flap discs, diamond Flap Disc and other abrasive discs

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105mm T27 Fiberglass Mesh Flap Disc Supporting Pads 3 Jpg

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