Product Refinement Position

The operating procedures can be found here; there are closed sampling devices and open sampling devices

Closed sampling is now required. (Pictures cannot be sent; they can be forwarded to you if needed) 6.6 Operating Procedures for Special Equipment Sample Collectors ⑴ High-pressure gas-liquid sample collector 1) Preparation work (1) Identify the sampling personnel: the plant supervisor shall lead one operator ； (2) Check that all valves in the sampler equipment are in the closed position ； (3) Connect the sampling bottle properly, ensure the plug is in place, verify that the valve is tightly closed and the plug is securely seated to prevent leaks. (4) Check that the supply of fresh water for cooling is normal ； (5) Prepare two fire extinguishers to ensure the proper supply of fire-fighting steam and water ； (6) Prepare one temporary oil receiving tank and 3 meters of rubber hose. 2) Sampler flowchart 3) Sampling steps (1) Supply cooling water. Open the main fresh water valve, the inlet valve for the cooler water used in sampling, and the outlet valve for the cooler water. During sampling, adjust the amount of fresh water according to the temperature after cooling, so as to keep the temperature of the medium below 50°C. (2) Slightly open sampling valve V-1, open stop valves V-2 and V-4, observe the pressure after the primary pressure reducer, adjust primary pressure reducer V-3 to keep the pressure after it at 2.0 MPa, so that the medium enters the gas-liquid separator for separation. (3) When sampling the liquid, first open the shut-off valves V-10 and V-13 of the liquid sampling system as well as the vent valve V-14; a rubber hose is connected to the vent valve and leads to a temporary oil collection tank. Adjust the liquid-phase pressure reducer to keep the pressure after it at 0.6 MPa, and replace the medium in the sampler for 2–3 minutes. Then open the shut-off valves V-11 and V-12 of the liquid cylinder; after keeping them open for 2–3 minutes, the cylinder will be filled with the liquid medium. Once sampling is complete, close the liquid-phase pressure reducer as well as the shut-off valves V-11 and V-12 of the cylinder. (4) During gas sampling, first open the shut-off valves V-5 and V-8 of the gas sampling system as well as the flare vent valve V-9. Adjust the vapor pressure reducing valve to keep the pressure after it at 0.6 MPa, and allow the gas to be vented through the flare for 2–3 minutes. Then open the shut-off valves V-6 and V-7 of the gas cylinders; after keeping them open for 2–3 minutes, the cylinders will be filled with the gas medium. Once sampling is complete, close the vapor pressure reducing valve, followed by closing the shut-off valves V-6 and V-7 of the cylinders. (5) Once sampling is complete, close the medium inlet valves V-1a and V-1b, and open the liquid-phase pressure relief valve to depressurize the liquid-phase sampling system until gas is observed coming from the vent valve; then close all valves in the liquid-phase sampling system ； Open the vapor pressure relief valve to vent the gas from the sampling separator tank and the vapor sampling system to the flare, reducing the pressure to flare level. Close all shut-off valves and cooling water valves in the sampling system, and drain all the fresh water from the cooling water tank. (6) Open the quick connector connected to the gas cylinder and remove the cylinder. 4) Precautions: (1) Plastic buckets are prohibited for use as temporary oil collection tanks during sampling ； (2) Sampling must be carried out by at least two people, with fire prevention measures in place ； (3) Once a leak is detected inside the sampler during sampling, immediately close the inlet valve of the sampler to stop sampling and carry out repairs ； (4) Use an oil collection tray when removing the gas cylinder to catch any leaking oil, thereby preventing contamination of the equipment ； ⑵High-pressure gas phase sampler 1) Preparation work (1) Determine the personnel who will go to the site for sampling ； (2) Check that all valves in the sampler equipment are in the closed position ； (3) Connect the sampling bottle properly, ensure the plug is in place, verify that the valve is tightly closed and the plug is securely seated to prevent leaks. 2) Sampler flowchart 3) Sampling steps: (1) Close the vent valve 8. (2) Slowly open the medium inlet valve 1, and check for leaks in the pressure gauge and flanges. (3) Slowly open valve 2, and verify that the pressure reducing valve 1 is functioning properly; otherwise, make adjustments. (4) Slowly open valve 3 and check whether pressure relief valve 2 is functioning properly; otherwise, make adjustments. (5) Open valves 10, 4, 6, and 9 in sequence, and check the pressure gauge and connections for any leaks. (6) Open valve 7 to allow the medium to circulate for a while, then close it; open the upstream and downstream valves of the cylinder to take samples. (7) After sampling is complete, close medium inlet valve 1, close the valves upstream and downstream of the cylinder, close medium outlet valve 10, and open vent valve 8. (8) Open the quick connectors at both ends of the cylinder, remove the cylinder, and the sampling is complete. ⑶Low-pressure sampler 1) Preparation work (1) Identify the sampling personnel: the shift supervisor shall lead one operator ； (2) Check that all valves in the sampler equipment are in the closed position ； (3) Connect the sampling bottle properly, ensure the plug is in place, verify that the valve is tightly closed and the plug is securely seated to prevent leaks. 2) Sampler flowchart 3) Sampling steps: (1) Close the vent valve 7 and the emergency backup valve 4. (2) Slowly open the medium inlet valves 1 and 2, and check for leaks in the pressure gauges and flanges. (3) Open valves 5 and 6 in sequence, and check for leaks in the pressure gauges and connections. (4) Open valve 3 to allow the medium to circulate for a while, then close it; open the upstream and downstream valves of the cylinder to take samples. (5) After sampling is complete, close medium inlet valve 1, close the valves upstream and downstream of the cylinder, close medium outlet valve 10, and open vent valve 7. (6) Open the quick connectors at both ends of the cylinder, remove the cylinder, and the sampling is complete.