What to do if the outlet pressure of the natural gas compressor is insufficient? Complete troubleshooting and solutions

In modern industrial production, especially in the fields of natural gas extraction, transportation, storage, chemical industry, gas stations, etc., natural gas compressors play a vital role. It is responsible for raising low-pressure natural gas to the required high pressure to meet the needs of subsequent process flow or storage and transportation. However, various faults are inevitable in the long-term operation of the equipment, among which “insufficient outlet pressure” is one of the thorny problems often faced by field operators and maintenance engineers.

Insufficient outlet pressure of natural gas compressor means that the compressor cannot meet the expected output pressure standard. This will not only directly affect production efficiency, resulting in the inability of subsequent process flow to proceed normally, but may even cause production interruption and bring huge economic losses. For example, at a CNG gas station, if the compressor outlet pressure is insufficient, it will directly affect the gas filling speed and gas filling volume, reducing customer satisfaction; in a long-distance natural gas pipeline, insufficient outlet pressure may lead to a decrease in delivery volume, affecting the stability of downstream gas supply.

In the face of this problem, how to quickly and accurately determine the cause of the fault and take effective solutions is a key skill that every natural gas compressor user and maintenance personnel must master. This article aims to explore the various possible reasons for insufficient outlet pressure of natural gas compressors, elaborate on scientific troubleshooting steps, provide practical solutions, and emphasize a series of preventive measures to help readers avoid such problems from the source and ensure stable and efficient operation of the equipment.

1.Common causes of insufficient outlet pressure of natural gas compressors

Insufficient outlet pressure of natural gas compressors is not a single fault, and there may be multiple interrelated or independent factors behind it. Understanding these common causes is the prerequisite for effective troubleshooting.

1.1 Insufficient gas supply

Insufficient gas supply is one of the primary reasons for the drop in natural gas compressor outlet pressure. When the natural gas compressor cannot get enough gas, it cannot reach the design pressure even if it operates normally.

The intake valve is not fully opened or blocked: This is the most common and easily overlooked reason. The operator may inadvertently fail to fully open the intake main valve or the branch valve before the compressor, or there may be foreign matter blocking the valve, which restricts the gas flow.

Intake pipeline leakage: Leakage in flanges, welds, instrument interfaces or valve stuffing boxes on the intake pipeline will cause external air or ambient gas to be inhaled, diluting the natural gas concentration and reducing the actual amount of natural gas entering the compressor, thus affecting the outlet pressure.

Low natural gas source pressure: The upstream gas source supply is unstable or the pressure itself is lower than the designed intake pressure of the natural gas compressor. The natural gas compressor cannot reach the expected outlet pressure even if it is running at full load. This is particularly common in the late stage of gas field development or when the pipeline pressure fluctuates greatly.

Filter blockage (intake filter or oil-gas separator): The intake filter is used to remove solid particles and droplets in natural gas. After long-term use, it is easy to accumulate dust and impurities, causing blockage, increasing intake resistance and reducing intake volume. For screw or vane compressors, blockage of the oil-gas separator will affect the oil-gas separation effect, resulting in increased pressure drop and affecting the final outlet pressure.

1.2 Compressor body problem

The compressor body is the core component for achieving gas compression. The wear or failure of its internal components directly affects the compression efficiency and final pressure.

Wear of cylinder or piston ring leads to poor sealing (positive displacement compressor): For reciprocating (piston) compressors, the seal between the inner wall of the cylinder and the piston ring is the key to achieving effective compression. As the running time increases, the inner wall of the cylinder may be strained and worn, and the elasticity of the piston ring may be weakened or worn and thinned, causing the gas to leak from the gap between the piston and the cylinder wall during the compression process, forming an “internal leakage”, which causes the final outlet pressure to drop.

The gap between the rotor and the stator is too large, or the blades are worn (power compressors, such as centrifugal and axial flow): For power compressors such as centrifugal and axial flow, the gap between the rotor (impeller) and the stator is too large, or the blades on the impeller change their geometry and surface due to corrosion, wear, scouring, etc., which will significantly reduce the compression efficiency and cause gas energy loss, so that the designed outlet pressure cannot be reached.

The interstage or end-stage cooler is not effective, resulting in excessively high gas temperature and reduced density: multi-stage compressors usually have coolers between stages to reduce gas temperature and improve subsequent compression efficiency. If the cooler (or aftercooler) is scaled or blocked inside, or the cooling medium (water, air) has insufficient flow or the temperature is too high, the gas temperature cannot be effectively reduced. High-temperature gas has a low density, and the number of gas molecules is reduced under the same volume, which reduces the compression efficiency and ultimately affects the outlet pressure.

Lubricating oil system problems (insufficient oil level, oil deterioration, oil line blockage, etc.): Lubricating oil is not only used to reduce friction and wear, but also plays a sealing and cooling role in certain types of compressors. Too low oil level may cause dry friction of some parts, aggravated wear, and thus affect the seal. Oil deterioration (such as emulsification, carbonization) will reduce lubrication, cooling and sealing performance. Oil line blockage may lead to insufficient lubrication of key parts, and even cause high-temperature locking, which in turn affects compression performance.

1.3 Valve problems

Various valves in the compressor system, whether main control valves or auxiliary valves, may affect pressure output due to failures.

The exhaust valve (check valve) is faulty and cannot be closed effectively: The function of the exhaust check valve is to prevent high-pressure gas from flowing back to the compressor. If the valve is damaged or stuck by foreign objects and cannot be completely closed, part of the high-pressure gas will flow back when the compressor stops working or the pressure fluctuates, resulting in the outlet pressure cannot be maintained.

Unloading valve/vent valve leakage or malfunction: Unloading valves or vent valves are usually used to release pressure when the compressor starts, stops or overpressure protection. If these valves have internal leakage under normal operating conditions, or malfunction and open due to control system failure, part of the high-pressure gas will be discharged directly, resulting in a drop in outlet pressure.

Safety valve tripping or pressure relief setting value is too low: The safety valve is a system overpressure protection device. If the set pressure of the safety valve is too low, lower than the normal operating pressure, or the safety valve itself has defects (such as spring fatigue, valve seat wear), it may also leak or frequently trip under normal pressure, causing pressure loss.

1.4 Transmission system problems

The natural gas compressor is driven by a power source. Any problem with the transmission system will affect the natural gas compressor speed, and thus affect the gas output and pressure.

Insufficient motor power or failure: The drive motor is the “heart” of the compressor. If the motor power is not properly selected, it cannot drive the compressor to the rated speed, or the motor itself fails (such as winding damage, bearing wear leading to increased friction and reduced speed), which will lead to a decrease in the compressor output capacity and insufficient pressure.

Belt slippage or wear (belt drive): For belt-driven compressors, the belt is loose, severely worn or contaminated with oil, resulting in reduced friction, which will cause slippage, making the actual speed of the compressor lower than the motor speed, affecting the gas production.

Coupling failure: The coupling connects the motor and the compressor to transmit torque. If the elastic element of the coupling is damaged, poorly aligned or the bolts are loose, it may lead to a decrease in torque transmission efficiency, or even abnormal noise and vibration, affecting the normal operation of the compressor.

1.5 Control system problems

Modern compressors are highly automated, and the control system is its “brain”. Any sensor or controller failure may mislead the operation of the equipment.

Pressure sensor misalignment or damage leads to control system misjudgment: The outlet pressure sensor is the key to the control system obtaining pressure signals. If the sensor reading is inaccurate (drifting) or completely damaged, the control system will not be able to obtain the true outlet pressure value, and may mistakenly believe that the pressure has reached the standard and stop pressurization, or make incorrect adjustments, resulting in insufficient actual pressure.

PLC or control module program error: Programmable logic controller (PLC) is the core of compressor control. Logical errors in the program and improper parameter settings (such as pressure set point, PID parameters) may cause the compressor to be unable to effectively respond to pressure requirements and insufficient outlet pressure.

Failure of regulating valves (such as bypass valves): Many compressor systems control flow and pressure by adjusting bypass valves. If the bypass valve is stuck in the open position, or the response is slow and the action is inaccurate, it will cause gas diversion, resulting in a drop in outlet pressure.

1.6 Pipeline system problems

The pipeline system after the natural gas compressor outlet is also a factor that affects the final pressure.

The outlet pipeline diameter is too small or the resistance is too large: If the outlet pipeline diameter is too small during design, or there are too many elbows, too many valves, and rough inner walls, the friction resistance of gas flow will increase, resulting in excessive pressure drop along the pipeline, and the pressure at the gas point will be lower than the expected value.

Leakage in the outlet pipeline: There is a leak in the pipeline between the compressor outlet and the gas point, and the high-pressure gas escapes directly into the atmosphere, which naturally causes the pressure at the gas point to drop. This is similar to the intake leakage, but the pressure loss caused is more direct.

There is liquid accumulation or debris blockage in the pipeline: Natural gas may carry a small amount of condensate (water, hydrocarbon liquid) or solid particles. If there is no effective drainage or filtering device in the pipeline, these substances may accumulate or block at the low point of the pipeline, reduce the flow cross-section, increase flow resistance, and cause pressure drop.

2.Troubleshooting steps for insufficient outlet pressure of natural gas compressor

When the outlet pressure of the natural gas compressor is insufficient, it is crucial to follow a systematic and logical troubleshooting step. This not only improves efficiency, but also avoids unnecessary disassembly and misjudgment.

2.1 Preliminary inspection and data recording

Before embarking on an in-depth investigation, a series of preliminary inspections and recording of key operating data will help quickly locate the approximate scope of the problem.

Observe the pressure gauge readings: Carefully observe the natural gas compressor inlet pressure gauge, outlet pressure gauge, and possible interstage pressure gauges. Record the current readings and compare them with historical data or design parameters during normal operation. Pay special attention to the deviation of the outlet pressure from the design value.

Check the equipment operating parameters:

Current and voltage: Check whether the motor operating current and supply voltage are within the normal range. Low current may indicate insufficient load or motor failure, and high current may indicate mechanical locking or motor overload.

Temperature: Monitor the temperature of various compressor components (such as bearings, cylinders, motors, exhaust ports), as well as the inlet and outlet temperatures of the cooling medium (water, air). Abnormally high temperatures may indicate increased friction, poor cooling, or internal leakage.

Vibration and noise: Listen carefully to the sound of the natural gas compressor when it is running, whether there are abnormal knocking sounds, friction sounds, leaking hissing sounds, or irregular vibrations. These may indicate mechanical failure, loose components, or gas leaks.

Check the oil level and oil quality: Make sure the lubricating oil level is within the normal range. Observe the color and state of the oil to see if there is any emulsification, blackening, impurities, etc.

Check the cooling water/air flow: Confirm whether the flow of the cooling medium (cooling water or cooling air) is sufficient and whether the pipeline is unobstructed.

2.2 Step-by-step troubleshooting process

Follow the principles of “from outside to inside”, “from simple to complex”, and “elimination method” to conduct systematic troubleshooting.

From outside to inside:

Confirm the valve status: First check the natural gas compressor inlet main valve, outlet main valve, and any bypass valve, unloading valve, etc. that may affect the process, to ensure that all related valves are in the correct open or closed position and are not misoperated or stuck.

Check the pipeline: Along the inlet and outlet pipelines, carefully check the flange connections, welds, instrument interfaces, and the pipeline itself for visible leaks (soapy water or leak detector can be used). Check whether the pipeline has signs of flattening, blockage, or accumulation of liquid.

Check the filter: After shutting down the natural gas compressor and relieving the pressure, check whether the air intake filter element is severely blocked. If a differential pressure gauge is installed, directly observe whether the pressure difference is too large. For compressors with oil-gas separators, check whether the oil-gas separator filter element is blocked.

From simple to complex:

Check the gas source: Confirm whether the upstream natural gas supply pressure is stable and meets the compressor intake requirements. If the gas source pressure itself is insufficient, then the compressor will not be able to help no matter how hard it tries.

Check the safety valve and unloading valve: Confirm whether the safety valve has signs of leakage or tripping under normal operating pressure. Check whether the unloading valve is stuck in the open position, or whether the control signal error causes malfunction.

Check the pressure sensor and instrument: If you suspect that the pressure gauge or sensor reading is inaccurate, you can use a calibrated spare pressure gauge for comparative measurement, or check the wiring and power supply of the sensor.

Elimination method:

Eliminate one by one: Based on the results of preliminary inspection and external troubleshooting, make a preliminary judgment on the possible causes of the fault. For example, if the intake filter pressure difference is too large, clean or replace the filter first. If the cooling water flow is insufficient, check the cooling water pump or pipeline.

System isolation: In some cases, you can try to isolate certain parts of the system to determine whether the problem occurs in that part. For example, if a branch is suspected of leaking, you can temporarily close the branch valve to observe whether the main line pressure is restored.

2.3 Common diagnostic tools

The effective use of appropriate diagnostic tools can greatly improve the efficiency and accuracy of troubleshooting.

Pressure gauge/pressure gauge: used to measure the pressure at various points such as inlet, outlet, interstage and cooling medium. Regular calibration is required to ensure accuracy.

Flow meter: used to measure the natural gas intake or cooling medium flow to determine whether the gas supply or cooling is sufficient.

Thermometer: used to measure the surface temperature of each component, gas temperature and cooling medium temperature, to assist in judging friction, cooling effect or internal leakage. Infrared thermometer (thermal imager) can quickly scan and find abnormal hot spots.

Leak detector: Professional natural gas leak detector (such as laser methane detector, semiconductor gas sensor, etc.) or simple soapy water (for non-high pressure areas) can be used to quickly locate gas leaks.

Vibration analyzer: used to measure the vibration amplitude, frequency and phase of the compressor, and analyze mechanical faults such as bearing, rotor imbalance, and poor alignment.

Ammeter/voltmeter: used to detect the operating status of the motor and determine whether there is overload, underload or power supply abnormality.

Endoscope: For piston compressors, an endoscope can be inserted through the spark plug hole or inspection hole to check the inner wall of the cylinder, piston ring wear or valve plate status to avoid unnecessary disassembly.

3.Solutions to insufficient outlet pressure of natural gas compressors

Based on the results of troubleshooting, taking targeted solutions is the key to restoring normal operation of the natural gas compressor. The following are solutions to the common causes mentioned above:

3.1 Insufficient air supply:

The air intake valve is not fully open or blocked: Check all air intake valves to ensure that they are in the fully open position. For valves blocked by foreign matter, it is necessary to close the upstream gas source and release the pressure before disassembling the valve for cleaning or replacement.

Intake pipeline leakage: Use a leak detector or soapy water to detect the leak point, and perform repair measures such as repair welding, replacing sealing gaskets, tightening flange bolts, or replacing damaged pipes.

Natural gas source pressure is too low: Contact the upstream gas source supplier to understand the gas source pressure fluctuations and negotiate a solution. If the gas source pressure is low for a long time, it may be necessary to consider adding a booster device in front of the compressor or adjusting the compressor selection.

Filter blockage: Regularly check the pressure difference between the air intake filter and the oil-gas separator filter element. When the pressure difference reaches the limit or there is a sign of blockage, the filter element should be cleaned or replaced immediately. Make sure to use original or high-quality replacement filter elements that meet the specifications.

3.2 For natural gas compressor body problems:

Cylinder or piston ring wear (volumetric): This usually requires shutdown for overhaul. Measure the cylinder. If the wear exceeds the maintenance standard, it is necessary to bore the cylinder or replace the cylinder liner. Replace the worn or inelastic piston ring. At the same time, check the piston, connecting rod and other parts.

The gap between the rotor and the stator is too large, or the blades are worn (dynamic): Such problems usually require professional maintenance. Dynamically balance the rotor and repair or replace the worn blades. If the gap is too large and cannot be solved by adjustment, it may be necessary to replace new rotors or stator parts.

Interstage or end-stage coolers are not effective:

Check whether there is scaling or blockage inside the cooler. High-pressure water flushing or chemical cleaning can be used to remove the scale.

Check whether the supply, temperature and flow rate of the cooling medium (water or air) are normal, and clean the cooling tower, water pump, fan or pipes if necessary.

For air-cooled types, clean the dust and debris on the heat sink and ensure good ventilation.

Lubricating oil system problems:

Check the lubricating oil level and replenish it to the normal range in time.

Regularly test the quality of lubricating oil, and replace qualified new oil on time according to the test results and running time.

Clean the lubricating oil filter and oil circuit to ensure that the oil is clean and unobstructed.

Check whether the oil pump and oil pressure regulating valve are working properly.

3.3 For valve problems:

Exhaust valve (check valve) failure: After shutting down the natural gas compressor and releasing the pressure, check whether the valve disc and valve seat of the exhaust check valve are stuck, worn or corroded by foreign objects. Clean, repair or replace the faulty parts.

Unloading valve/vent valve leakage or malfunction: Check the pneumatic actuator, solenoid valve and control circuit of the unloading valve/vent valve. Make sure it is in the closed state during normal operation. Repair the leak or replace the damaged parts.

Safety valve trips or the pressure relief setting value is too low: Recheck the set pressure of the safety valve to ensure that it meets the design requirements. If the safety valve frequently trips and the setting is normal, it may indicate that there is a risk of overpressure in the system or that there is a problem with the safety valve itself. Professional organizations should be asked to check or replace the safety valve.

3.4 For transmission system problems:

Insufficient motor power or failure: Check the motor operating parameters. If any abnormality is found, a professional electrician should be asked to repair it. If the motor power is indeed insufficient to drive the compressor, a motor with appropriate power needs to be replaced.

Belt slippage or wear: Adjust the belt tension to ensure that it is moderate. If the belt is severely worn, it should be replaced in time. Ensure that the pulley surface is clean and free of oil.

Coupling failure: Check whether the elastic element of the coupling is damaged and whether the bolts are loose. Accurately align the coupling to ensure that its coaxiality is within the allowable deviation range.

3.5 For control system problems:

Pressure sensor misalignment or damage: Use a standard pressure gauge to calibrate the pressure sensor. If there is still a large deviation or calibration cannot be performed after calibration, a new sensor should be replaced. At the same time, check whether the sensor wiring is firm and whether there is any damage.

PLC or control module program error: Ask a professional instrument or automation engineer to check the PLC program, check the setting parameters, and find and correct the logical errors.

Failure of regulating valve (such as bypass valve): Check the actuator, positioner and valve body of the regulating valve. Clean the valve core and valve seat to eliminate sticking. Recalibrate the regulating valve to ensure that it is responsive and accurate.

3.6 For pipeline system problems:

The outlet pipeline diameter is too small or the resistance is too large: evaluate the existing pipeline design. If the pressure drop is indeed too large, pipeline modification may be required, including increasing the pipe diameter, reducing elbows, optimizing the pipeline direction, etc.

Leakage in the outlet pipeline: Similar to the leakage of the intake pipeline, use a leak detector or soapy water to detect and repair all leaks. For high-pressure areas, special attention should be paid to leak detection safety.

There is liquid accumulation or debris blockage in the pipeline: add a drain valve or steam trap at the low point of the pipeline to discharge the accumulated liquid regularly. For gases that are prone to scaling or contain impurities, a high-efficiency filter or separator should be added to the pipeline and cleaned regularly.

4.Preventive measures: Avoid insufficient outlet pressure of natural gas compressors

Prevention is better than cure. Taking active and effective preventive measures is the key to ensure the long-term stable operation of natural gas compressors, avoid insufficient outlet pressure, and thus reduce maintenance costs and production losses.

4.1 Formulate and strictly implement regular maintenance plans

This is the most basic and most important preventive measure. A comprehensive and detailed maintenance plan can ensure that all parts of the equipment are always in the best working condition.

Daily inspection: Visually inspect the compressor every day, including oil level, pressure gauge reading, operating sound, vibration, cooling system status, leak points, etc. Record the operation log to detect abnormalities in time.

Weekly inspection: Check the filter pressure difference and clean or replace it if necessary. Check the belt tension (if applicable) and perform a simple tightening check.

Monthly inspection: Check the quality of the lubricating oil and lubricate key components. Check the action sensitivity of the safety valve and unloading valve. Check the electrical connection and grounding.

Quarterly inspection/semi-annual inspection: Replace the lubricating oil and filter element. Check the efficiency of each level of coolers and clean them if necessary. Inspect and maintain the valve. Check the motor and transmission system.

Annual inspection/overhaul: Perform a comprehensive inspection and replace wearing parts such as piston rings, valves, bearings, rotors, impellers, etc. according to the running time or mileage. Disassemble the compressor for inspection and calibration to restore its design performance.

Establish detailed maintenance records: record the time, content, problems found, replaced parts, responsible persons and other information of each maintenance. These data are valuable information for analyzing equipment operation trends, predicting failures and optimizing maintenance plans.

4.2 Regularly inspect and replace wearing parts

Many parts inside the compressor are consumables or wearing parts, and their service life directly affects the performance of the equipment.

Filter element: Intake filter, oil filter, oil-gas separator filter element, etc. should be regularly inspected and replaced according to the manufacturer’s recommended cycle or pressure difference indicator. Clogged filter elements will increase intake resistance, reduce gas production, and even cause component damage.

Valve (piston compressor): The suction valve and exhaust valve are key components of piston compressors, and they will wear or fatigue after long-term operation. The valve plate, spring, valve seat, etc. should be checked regularly, and worn or deformed parts should be replaced in time to ensure good sealing.

Piston ring and stuffing box: Regularly check the wear and elasticity of the piston ring and the sealing performance of the stuffing box. Worn piston rings or leaking stuffing boxes can cause gas leakage and reduce compression efficiency.

Bearings and seals: Bearings are important supports for mechanical transmission, and seals prevent gas or oil leakage. Regularly check their wear, listen for abnormal sounds, observe whether there is oil leakage or gas leakage, and replace them in time if necessary.

Belt (belt drive): Regularly check whether the belt is cracked, aged, worn or loose, and adjust the tension or replace it in time.

4.3 Strengthen operator training and improve fault identification ability

People are the most important factor in equipment management. Professional knowledge and skilled operating skills can effectively prevent and detect problems early.

Be familiar with equipment principles: Train operators to have an in-depth understanding of the working principle of natural gas compressors, the composition and functions of each system, and understand the meaning of each parameter.

Master operating procedures: Strictly follow the operating procedures to start and stop the equipment, monitor operation, and handle emergencies. Irregular operations may cause equipment abnormalities.

Learn to observe and judge: Train operators to identify abnormal sounds, vibrations, odors, temperature, pressure changes, etc. during equipment operation, and be able to make preliminary judgments on possible problems. For example, when the pressure gauge reading is abnormal, is it a sensor failure or actual pressure fluctuations?

Data recording and analysis: Train operators to accurately record operating data, conduct preliminary data analysis, compare with historical data or normal values, and find abnormal trends.

Emergency handling capabilities: Train operators to master common fault handling processes, such as preliminary troubleshooting when pressure is insufficient, and safe shutdown and isolation in emergency situations.

4.4 Establish a complete equipment archive to record operating data and maintenance history

Detailed equipment archives are the cornerstone of equipment management, providing data support for fault diagnosis, maintenance decisions and equipment upgrades.

Basic equipment information: Record the model, specifications, manufacturer, factory date, installation date, design parameters, etc. of the equipment.

Operating parameter records: Record the inlet pressure, outlet pressure, interstage pressure, temperature at each point, motor current, voltage, operating time, cumulative operating hours, maintenance information, etc. every day or every shift. These data can be used to analyze equipment operating trends and predict failures.

Maintenance history: Record in detail the time, phenomenon, cause of each failure, measures taken, parts replaced, maintenance personnel and maintenance costs. These historical data help identify the weak links of the equipment and optimize the maintenance plan.

Spare parts management: Record the inventory, procurement information, usage, etc. of spare parts to ensure the timely supply of key spare parts.

Technical documents: Keep the operation manual, maintenance manual, drawings, certificates and other technical documents of the equipment properly for easy reference.

4.5 Consider introducing predictive maintenance technology

The transition from traditional scheduled maintenance (time-based) to predictive maintenance (condition-based) can more accurately identify potential problems.

Vibration monitoring: Install vibration sensors on key bearings, rotors and other parts to continuously monitor vibration data. Through vibration spectrum analysis, early signs of failure such as bearing wear, rotor imbalance, poor alignment, gear defects, etc. can be detected in advance.

Oil analysis: Regularly perform spectral analysis, iron spectrum analysis, viscosity analysis, acid value analysis, etc. on lubricating oil. By analyzing the type, size and concentration of wear particles in the oil, as well as changes in oil performance, the wear state inside the equipment and the aging of the oil can be determined.

Thermal imaging technology: Use infrared thermal imagers to perform non-contact temperature measurements on compressors and related pipelines and electrical components. Local hot spots can be quickly found, such as loose electrical connectors, bearing friction, cooler blockage, gas leakage, etc., which may lead to insufficient pressure.

Acoustic detection: Use ultrasonic or acoustic sensors to detect gas leaks. High-pressure gas leaks will produce specific ultrasonic frequencies, and professional equipment can be used to efficiently locate leaks.

Online monitoring system: Install an integrated online monitoring system to collect, analyze and warn trends of key operating parameters of the compressor in real time. When the parameters deviate from the normal range, the system will automatically alarm and remind the operator to deal with it in time.

4.6 Optimize process parameters and gas source management

In addition to the maintenance of the equipment itself, the optimization of upstream gas sources and downstream process parameters is also crucial.

Stabilize gas source pressure: Maintain good communication with the gas source supplier to ensure that the natural gas pressure entering the compressor is stable as much as possible to avoid large fluctuations. If necessary, consider adding a buffer tank or a pressure stabilizing device.

Control the inlet temperature and humidity: Too high an inlet temperature will reduce the compression efficiency, and too high a humidity will increase the risk of corrosion and scaling. Try to control the inlet temperature and humidity within the design range.

Avoid overload operation: Operate the compressor strictly according to the design load to avoid long-term overload operation. Overload will accelerate component wear, reduce equipment life, and may cause insufficient pressure.

Optimize downstream gas consumption: Check whether there is unnecessary leakage or waste in downstream gas-using equipment to ensure that the gas consumption is within the design capacity of the compressor.

4.7 Spare parts management and supply chain optimization

Establish a spare parts list: clarify the list, specifications, and supplier information of all key spare parts and wearing parts.

Reasonable inventory: According to the importance of equipment, spare parts procurement cycle and frequency of failure, formulate a reasonable spare parts inventory to avoid long downtime due to lack of spare parts.

Select reliable suppliers: Select spare parts suppliers with reliable quality and good after-sales service to ensure the quality of spare parts and timely delivery.

Summary

Low outlet pressure of natural gas compressor is a complex fault, and its causes may involve multiple aspects such as gas supply, compressor body, valve, transmission, control and piping system. In the face of this problem, we must adopt a systematic and logical troubleshooting method, from preliminary inspection to in-depth analysis, step by step. At the same time, accurate and effective solutions should be adopted for different causes of failure to ensure that the equipment can quickly resume normal operation.

However, the most efficient strategy is not to remedy the situation after the fact, but to prepare for a rainy day. By formulating and strictly implementing a comprehensive regular maintenance plan, regularly checking and replacing wearing parts, strengthening professional training of operators, establishing a complete equipment archive, and actively introducing advanced technologies such as predictive maintenance, we can minimize the probability of insufficient outlet pressure of natural gas compressors. In addition, optimizing process parameters, stabilizing gas source management, and establishing a sound spare parts management system are also indispensable links to ensure the continuous and efficient operation of equipment.

Remember, prevention is better than cure. Only by integrating preventive measures into every link of daily management and operation can we truly ensure the stable and reliable operation of natural gas compressors and provide solid guarantees for the continuity and economic benefits of production. When you are faced with the problem of insufficient outlet pressure of the natural gas compressor, I hope this article can provide you with a comprehensive and practical guide to help you deal with it calmly and ensure worry-free production.