Pipeline Valves

DThere are mainly two pipe flange standards used for important pipe connections at home and abroad: European DiNstandards and American ASME B16.5 and B16.47 standards. The producls in the same system standards can basically bematched with each other, but in different systems cannot be matched.Fasteners for valves are an important part of the pressure pipeline system. Bot-type fasteners are mostly used for flangeplates, When the tension is large, single-head bolts are easy to break at the connection of screw. So, they cannot be usedon medium and high-pressure flanges. Double-end studs can not only be used on medium and high- pressure fianges, butalso be easily tightened from both sides.

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Rail Transit

Because of their functional characteristics, bridges and tunnels often play a role in construction projecls such as crossingmountains, crossing rivers and seas and penetrating natural cuting. High strength and corrosion resistance of fasteners arereguired in such occasions. The fastener products with high corrosion resistance materials are applicable to variousunderground and marine environments with high alkalinity and high acidity.

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Aerospace

Because of the particularity of the use occasions, aviation fasteners should have higher anti-loosening requirements than onthe ground apart from the basic performance. They should also meet the reguirements for maintenance and replacementBesides, aviation fasteners should not only be anti-loose but also anti-lock. in addition, due to their highly integrated processdesian, the aviation fasteners should be suitable for assembly and use in narrow environments.

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Nuclear Power Energy

Due to the dense distribution of its core, photovoltaic panels are high integrated. The commercial and civil smallscalepanels are mostly installed on the roof of the top floor with narrow space, especially on the roof of the factory , which makespeople select fasteners that are suitable for narrow environments and easy to remove and replace when instaling theequipment.At the same time, the selection of fasteners should also vary according to different regions. For example, the requirementsfor corrosion resistance of fasteners in the rain environment in the south are the same as in the dry environment in the north.

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Communication Technology

Communication industry is a representative of high automation. The large-scale application of mechanical arms has madethe advantages of the assembly mulliple times higher. Mechanical arms have changed from grasping screws, spring washeland flat washer separately to grasping assembly at one time, which has greatly improved the production efficiency infactories.At the same time., due to its communication design characteristics, the demand for low-magnetic and non-magnetic productsis far higher than that of other industries; Most products need surace treatment such as dacromet and cellulose coating toreduce the interference of the environment on the products.

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