The core message: It is relatively common for chemicals to cause accidents during transportation. A thorough understanding of the safe transportation of chemicals and a knowledge of the safe transportation regulations for chemicals are of great significance for reducing transportation accidents.
1. The consignment of dangerous goods must present the relevant certificates and go through the formalities in the designated railway, transportation and shipping departments. The consignment must be consistent with the name listed on the consignment note. Consigned dangerous goods that are not listed on the national name list should be accompanied by a technical appraisal book that has been reviewed and approved by the higher authorities.
2. Dangerous goods handlers should wear the appropriate protective equipment according to the nature of the dangerous goods they ship. They must be lightly loaded and unloaded during loading and unloading. Do not wrestle, weigh, or rub against the containers. Do not damage the packaging containers, pay attention to the signs, and stack them securely. .
3, before loading and unloading of dangerous goods, the vehicle (ship) handling tools necessary for ventilation and cleaning, no residue, the vehicle (ship) equipped with highly toxic substances must be cleaned after unloading.
4. Shipment of explosives, highly toxic, radioactive, flammable liquids, combustible gases, etc. Must use transportation equipment that meets safety requirements: It is forbidden to transport explosives with battery car, dump truck, forklift, bicycle, etc. When transporting strong oxidants, explosives, and primary flammable liquids packed in iron drums, no reliable safety measures have been taken. Iron floor cars and automobile trailers are not allowed; flammable and explosive materials are prohibited from being transported by forklifts, forklifts, and dump trucks. Dangerous articles such as liquefied gas; in areas with high temperature loading hazardous materials such as liquefied gas and flammable liquids, there must be sun protection facilities; special transport vans for transporting radioactive materials and handling by lifting frames; loading and unloading machinery should be reduced by 25% in accordance with regulations; Combustion items and toxic substances are prohibited from being carried by small-scale sailing boats, small wooden boats and cement boats.
5, transport explosions, highly toxic and radioactive materials, should assign someone to escort, escort personnel shall not be less than 2 people.
6. Vehicles transporting dangerous goods must maintain a safe speed, maintain the distance between vehicles, and strictly prohibit overtaking, overspeeding, and forcing the vehicles. The route for transporting dangerous goods must be approved by the local public security traffic management department in advance, and transported on the designated route and time. It is not allowed to drive and stop on busy streets. In the event of a leak, if individual forces cannot be recovered, they must quickly move to empty areas and away from the crowds and water sources. In the event of an accident, it is necessary to expand the scope of isolation and immediately report it to the relevant departments such as fire control and traffic management.
For Gate Valve with pressure Class 600 / PN100 or higher, Pressure seal bonnet is suggested for better closure, while bolted bonnet is still available for customer's option.
The pressure seal design incorporates a metal-to-metal seal that becomes tighter as the pressure increases. The initial preload deforms the taper on the soft iron gasket to mate with the taper on the bonnet. The thin knife-edge on the gasket is wedged tightly between the body and the bonnet. The shallow angle insures that the gasket is sealed tightly with only a small upward force on the bonnet. Once the initial seal is created, the body/bonnet joint will remain leak free regardless of thermal or pressure conditions in the valve.After the joint has been assembled, there is no further need to adjust bonnet cap screws.
Pressure Seal Gate Valve
Pressure Seal Gate Valve, Cast Steel Gate Valve Supplier, High Pressure Gate Valve, Wedge Gate Valve, API Gate Valve
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