The often-used 40,70,90,120 and 150-liter empty cylinders in cabinet HFC-227ea gas extinguishing devices weigh around 44,59,71,87 and 112 kilograms respectively.The often-used 70,90,120 and 150-liter empty cylinders in HFC-227ea gas extinguishing equipment with pipe network weigh around 68,81,100,and 120 kilograms respectively.We provide the weights of the empty HFC-227ea fire extinguishing agent cylinders for the purpose of providing reference for engineering service providers,users,supervisors and inspection and accepting units in their weighing and checking.
Measures to take:before the manufacturer delivers the products,go to the location of the manufacturer,or to the cylinder group room at project’s installation site and make random sampling of one to three fire extinguishing agent cylinder groups and check their total weights;check if the cylinder groups are stilled perfectly sealed with no sign of any leaking;if the total weight of a fire extinguishing agent cylinder group is below standard,it means the gas manufacturer has failed to fill enough gas into the cylinder,or the dealer(or engineering service provider)has changed the weight provided on the product plate,and not because there is leakage of the agent.Based on the result of the random sampling of fire extinguishing agent cylinder groups,list the weights of the empty cylinders(vs the weights provided by the manufacturer and the weight provided above),the weights of fire extinguishing agents(vs the weights provided on the drawings made by the design institute,the weights of propellant nitrogen gas,calculate based on the above information and find out the actual weight of HFC-227ea fire extinguishing agent fill into the cylinder group.
For example:sample-checking one of the cylinders of an 150-liter-cylinder group of a HFC-227ea gas extinguishing system with pipe network to find out the actual weight of HFC-227ea filled into this cylinder group.
The following are the checks and calculations:
①Check the sealing property of the 150-liter-cylinder group and make sure there is no leaking;
②Weigh the 150-liter-cylinder group,and if W=256.6Kg,
③Check if the weight provided on the product plate of the cylinder group is the same as the one designated by the design institute;
④Check the plate on the cylinder group to see if the weight of HFC-227ea filled into the cylinder is 122kg and the total weight of the cylinder group is 256.5kg;
⑤The calculation of the weight of the HFC-227ea agent filled in the cylinder should be based on the weight of the 150-liter empty cylinder provided by the manufacturer,or in reference to the weight of the 150-liter empty cylinder provided above:W1=128.6kg;the weight of the agent W2=256.6-128.6=128kg,while the weight of nitrogen gas W3=256.6-128.6-122=6kg,and nitrogen gas account for(6/122×100%=)4.9%of the weight of HFC-227ea,which conforms to the required rate provided above.The actual weight of HFC-227ea fire extinguishing agent filled in the cylinder is 122 kg,conforming to the required standard.
4.Vibration and high/low temperature resistance
All parts and components of the products for the gas fire extinguishing system product“Belt and Road”exporting project(also called gas fire extinguishing system exporting project,or gas fire extinguishing system exporting or gas fire extinguishing equipment exporting for short)should have good vibration resistance and high and low temperature resistance,can tolerance the long-distance trek of the three-dimensional transportation of sea,land and air and will not cause leakage or mis-initiation of equipment due to wind,waves,bumps,high and low temperature meteorological conditions during transportation.All parts and components of the products for the gas fire extinguishing system product“Belt and Road”exporting project(also called gas fire extinguishing system exporting project,or gas fire extinguishing system exporting for short)should be designed to resist vibrations,particularly the valves of the agent cylinder groups should adopt the double sealing horizontal pressure-gradient structure that has two air chambers,and a piston disc is installed inside the valve body that seals automatically thanks to the air pressure inside the valve body.A special starting cylinder and an ejector pin have to be installed to pierce the diaphragm seal of the air chamber of the cylinder valve in order to open the cylinder valve of the cylinder group.The valve does not have any opening handle or other prats.The most important feature of this kind of cylinder valve is that it is collision and vibration resistant and can withstand temperatures as high as+70℃and as low as-30℃.This can ensure that vibrations and temperature changes will not lead to the leakage of fire extinguishing agent and the cylinder can not be accidentally activated.
The gas fire extinguishing system product“Belt and Road”exporting project(also called the gas fire extinguishing system exporting project,or gas fire extinguishing system exporting or gas fire extinguishing equipment exporting for short)has strict requirement on the packaging of the products.All parts and components of gas fire extinguishing systems have to be packaged in boxes,and the packaging has to comfort to the following:
(1)Export packing boxes,also called export wooden packing boxes,export wooden boxes,plywood boxes,fumigation-free packaging boxes should be used for packaging,and it is absolutely prohibited to use the ordinary wooden packaging boxes,or the products will not be cleared by the customs.
(2)The shipping mark on the packing boxes must include the following information:
①Abbreviated or short form of the name of the consignee or buyer;②Reference Number,e.g.waybill number,order number or invoice number;
③Place of destination:
④Number of packages.
(3)Packing boxes must undergo damp-proof treatment by applying moisture-proof films on the inner walls of the boxes and placing certain quantity of desiccant inside.
（4）Packing boxes must undergo shock-proof treatment by applying shock-absorbing foamed plastic boards on the internal walls of the boxes,and all parts and components inside the boxes must be placed orderly,separated from each other with foamed plastic boards and make sure all empty spaces are filled with foamed plastics.Each agent cylinder group must be fixed at the bottom of the packing boxes with two to three packing straps to prevent it from rolling or bumping during shipping.
(5)A packing list should be placed inside each boxes,with information including names of the parts and components inside the box,and their models,specifications and numbers,etc.
(6)There must be a pallet below each packing box for the convenience of loading and transshipping.