Is Shorter Gas Filling Time Always Better?
Many users are particularly concerned about the gas filling time when purchasing and using gas filling equipment to fill gas cylinders. They hope that the gas filling time is as short as possible, in other words, they hope that the gas filling speed is as fast as possible. Actually, this is a very dangerous misconception. […]
Pressure Vacuum Relief Valve PVRV Test Procedure
The pressure vacuum relief valve, or PVRV for short, is typically installed on top of a petroleum storage tank. Its function is to automatically regulate the air exchange between the inside and outside of the petroleum tank to maintain stable internal pressure and prevent petroleum tank damaging or medium leaking due to abnormal pressure. Therefore, […]
How to Perform Pipe Pressure Testing
Plastic pipes, as well as various thermoplastic pipes, composite pipes, steel pipes, engineering hydraulic pipes and oil pipes, are all pressure components. In order to ensure the safety of pipes in future use, it is necessary to preform pressure testing on pipes. Pipe pressure testing contains pipe hydrostatic testing and pipe burst testing. Both tests […]
CNG Cylinder Hydro Test Procedures
The CNG cylinder hydrostatic test is to verify whether a CNG cylinder is qualified, thus ensuring that it can safely continue to be refilling natural gas and store the compressed natural gas. As well known, CNG cylinders are made of various materials, and their nominal working pressure is usually 20MPa. Therefore, CNG cylinders are classified […]
Oxygen Cylinder Hydro Test Procedures
The oxygen cylinder hydro test aims to verify whether an oxygen cylinder is qualified and whether the oxygen cylinder can continue refilling oxygen gas, thereby ensuring it safe daily use. Oxygen cylinders come in different materials, volumes, and nominal pressure ratings. Based on their application, oxygen cylinders can be subdivided into industrial oxygen cylinder, aviation […]
How to Refill Halon Fire Suppression Gas
Halon is a highly effective fire suppression gas, which is a colorless gas at room temperature and is typically stored in a liquid form in fire extinguishers after pressurization. In the event of a fire, the liquid halon will spray from the fire extinguisher and instantly vaporizes, thus extinguishing the fire. To increase halon’s spray […]
PSV Popping Test Procedures
The safety valve test and calibration contains three test items: PSV popping test, PSV reseating test and PSV sealing test. Why PSV Popping Test is Necessary? PSV popping test, as known as safety valve setting pressure test, is to verify whether the safety valve can pop up in time under the setting pressure, thus fulfilling […]
Why Vacuum Gas Cylinder before Filling Gas
Under normal circumstances, it is not necessary to vacuum gas cylinder before filling gas. However, vacuuming gas cylinder is necessary before filling purity gas, flammable gas or fire extinguishing agent into cylinder. Firstly, it can remove moisture, air, and impurities from the cylinder, and create a clean and dry environment for subsequent gas filling, thus […]
How to Use Nitrogen Gas Booster to Amplify Nitrogen Pressure
Nitrogen is a widely used gas with low acquisition cost. In addition to purchasing bottled compressed nitrogen from the market, you can also obtain nitrogen in large scale through a nitrogen generator. However, the compressed nitrogen pressure output by the nitrogen generator is generally below 10 bar, which cannot meet some applications that require higher […]