Inspection before filling The gas cylinder must be carefully and carefully checked before filling to prevent all cylinders that do not meet the requirements and requirements from being filled, to eliminate unsafe factors, and to ensure that the cylinders are filled and used. Safety in the process. 1 Whether the gas cylinder is manufactured by the unit holding the manufacturing license, whether the gas cylinder belongs to the manufacturing unit or the product that the competent safety supervision department declares to be scrapped or stipulated or needs to be re-examined. 2 Whether the gas cylinder modification meets the requirements. 3 Whether the original mark of the gas cylinder meets the standards and regulations, and whether the printed characters are clearly visible. The contents of the gas cylinder's printed mark shall include: gas cylinder manufacturing unit name or code; gas cylinder number; hydraulic pressure; nominal working pressure; actual mass; actual volume; bottle design wall thickness; manufacturing unit inspection mark and manufacturing Years and months; supervised inspection marks; cold areas marked with gas cylinders. 4 Whether the cylinder is within the valid period of the specified periodic inspection. 5 Whether the nominal working pressure marked on the cylinder meets the filling pressure specified by the gas to be installed. The nominal working pressure of the gas cylinder is defined as follows: the filling pressure of the gas at the reference temperature (20 ° C) (the cylinder containing the compressed gas); the filling of the medium at a temperature of 60 ° C according to the specified filling factor (liquefied gas) ); the pressure of the acetylene gas in the bottle (dissolved acetylene) at a temperature of 60 ° C under a defined filling amount. 6 Whether the color and typeface of the gas cylinder meet the requirements of the "Cylinder Color Mark". 7 gas cylinder accessories are complete and meet the technical requirements. 8 There is no residual pressure in the cylinder, and the remaining gas is consistent with the gas to be installed. 9 Whether the bottle valve and the bottle body containing oxygen or strong oxidizing gas are greased. 10 Whether the first inflated cylinder is replaced or vacuumed. 10 bottles with or without cracks, severe rust, obvious deformation, mechanical damage and other defects. (2) Filling amount of gas cylinder The filling amount of the gas cylinder refers to the mass of the gas or liquefied gas that the gas cylinder allows to be filled in a unit volume, so it is also called the large filling amount or the safe filling amount of the Zui. The filling amount of each type of cylinder should be determined according to the allowable pressure of the cylinder and the high use temperature of the Zui. The principle is to ensure that the gas or liquefied gas at the high temperature of the use of zui, the pressure does not exceed the allowable pressure of the cylinder. The allowable pressure of the cylinder is to ensure the safety of the cylinder and allow the high pressure of the Zui reached in the bottle. China's regulations: the allowable pressure of the high-pressure gas cylinder is equal to the nominal working pressure of the gas cylinder; the allowable pressure of the permanent gas cylinder is 1.2 times the nominal working pressure or 0.8 times the hydraulic pressure test pressure. The high use temperature of the cylinder is the high temperature that the cylinder can reach after filling the gas. According to China's "gas cylinder safety supervision regulations", the domestic use of gas cylinders, zui high use temperature is 60 ° C. The filling amount of the permanent gas (compressed gas) cylinder is different from that of the liquefied gas, and it refers to the filling pressure at the final filling temperature. (3) Filling of liquefied gas 1 The filling and re-inspection system is implemented, and overfilling is strictly prohibited. 2 Weighing scale should be kept accurate. 3 It is strictly forbidden to fill the cylinder directly from the LPG tanker. 4 After filling, check only one by one, and find that there are leaks or other abnormal phenomena should be properly handled. 5 Fill in the filling record carefully. 6 Operators should be relatively stable and regularly conduct safety education and assessment. (4) Check whether the temperature of the bottle wall is abnormal after filling. Whether the 2 bottles have defects such as bulging, deformation, leakage or pre-filling inspection. The airtightness of the connection between the 3 bottle valve and the bottle mouth is good, and the bottle cap and the explosion-proof ring are all in good condition. 4 Color marking and inspection color code are complete and meet technical requirements. 5 Sampling and analysis Whether the gas purity and impurity content in the bottle are within the specified range. 6 Whether the gas pressure and quality in the bottle are within the specified range.