The national standards for rare-earth-doped fiber in China, led by Wuhan Fiberhome Communication Co., Ltd., have been drafted from the 1st of this month. It is reported that this is the world’s first national standard for rare-earth-doped fiber.
This standard mainly deals with double-clad ytterbium-doped fibers in rare-earth-doped fibers. Other countries have not issued relevant national standards for rare-earth-doped fibers. Experts said that the formulation and implementation of this standard will promote the development of China's fiber laser industry, and have guiding significance for regulating and testing the import of related products.
The Flat Face Flange has a gasket surface in the same plane as the bolting circle face. Applications using flat face flanges are frequently those in which the mating flange or flanged fitting is made from a casting.
Flat face flanges are never to be bolted to a Raised Face Flange. ASME B31.1 says that when connecting flat face cast iron flanges to carbon steel flanges, the raised face on the carbon Steel Flange must be removed, and that a full face gasket is required. This is to keep the thin, bittle cast iron flange from being sprung into the gap caused by the raised face of the carbon steel flange.
Flat Flange,Slip On Flat Face Flange,Flat Face Blind Flange,Flat Face Weld Neck Flange
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