Various equipment inspection standards
Thread Content
1. FoundationLevels: ① Level 1 – in good condition; ② Level 2 – generally in good condition; ③ Not in good condition
Level 1: The foundation is stable, with no corrosion, tilting, or cracks. Connections are secure, with no looseness, breakage, or detachment.
Level 2: The foundation is stable, with no corrosion, tilting, or cracks. Connections are secure, with no looseness, breakage, or detachment.
Not in good condition: There is corrosion, tilting, cracks, looseness, breakage, or detachment.
2. Structure
Level 1: The structure is intact; all components are present. Wear, corrosion, and deformation are within acceptable limits.
Level 2: The structure and components are basically intact; minor defects exist but do not affect safe operation.
Not in good condition: The structure and components are incomplete, and this affects safe operation.
3. Lubrication
Level 1: Lubrication is adequate; there is no leakage of oil, water, gas, or other substances.
Level 2: Lubrication is generally satisfactory; there are no serious instances of leakage.
Not in good condition: There are serious instances of leakage.
4. Measuring instruments and protective devices
Level 1: Measuring instruments are sensitive and reliable; all safety protection devices are present.
Level 2: The main measuring instruments and safety protection devices are present and reliable.
Not in good condition: They are either incomplete or unreliable.
5. Equipment accuracy and operational efficiency
Level 1: The equipment operates normally; its accuracy meets the specified requirements at the time of manufacture.
Level 2: The equipment operates normally; its accuracy meets the requirements of the relevant process technology.
Not in good condition: The equipment does not operate normally and fails to meet process requirements.
Note: If any one of the five items indicates that the equipment is not in good condition, then the entire equipment is considered to be not in good condition. In recent years, many enterprises have formulated standards for equipment integrity in accordance with the format of enterprise standards, providing a more scientific and reasonable basis for determining and calculating the equipment integrity rate. At the same time, enterprises define the equipment integrity rate as the proportion of all operational production equipment within a company to the total amount of production equipment. The calculation formula is: Equipment availability rate = (Number of functional production equipment units/Total number of production equipment units) × 100%. It is clear that in order to accurately determine the equipment availability rate, equipment managers must first establish standards for the functionality of various production equipment in their company; only then can they carry out thorough inspections and evaluations based on those standards. In other words, the standard of equipment in good condition is the sole criterion for evaluating equipment quality, as well as the fundamental basis for enterprises’ equipment management. Without standards, it is impossible to check and assess the condition of equipment; just as you cannot determine whether Beijing is in the east or the west, you cannot succeed in doing so. Statistical standards for equipment integrity rate I. Definition of equipment integrity rate: The proportion of operational production equipment among all production equipment; it is an important indicator that reflects the technical condition of a company’s equipment and serves to assess the quality of equipment management. The calculation formula is: Equipment integrity rate = Total number of functioning equipment / Total number of production equipment × 100% = ×100%. The total number of equipment in the formula includes equipment that is in use, out of service, or mothballed. The standards for equipment integrity serve as the fundamental basis for equipment management. They provide a basis for assessing whether equipment is in good technical condition, and they are also the foundation and prerequisite for calculating the rate of equipment integrity. Statistical standards for equipment leakage rates
I. Classification of sealing points and scope of statistics
1. Dynamic seals: Seals between two components that are in continuous motion, rotation, or reciprocation in various electromechanical devices (including machine tools) are considered dynamic seals. Seals for components such as compressor shafts, pump shafts, and rotating shafts of various tanks all fall under dynamic seals. 2. Static sealing: In equipment (including machine tools) and indoor heating systems, as well as their associated pipelines and accessories, the sealing between two components that have no relative motion during operation is referred to as static sealing. Such as flanges on equipment pipelines, various valves, plug plugs, and union joints ； Oil gauges and auxiliary pipelines on pump equipment ； Transformers, oil circuit breakers, and cable joints for electrical equipment ； Instrument orifice plates, control valves, auxiliary leads ； The joints with other equipment also fall under static sealing. II. Statistical criteria for sealing points:
1. Statistical criteria for dynamic sealing points: A seal between two components that are in continuous motion, rotating, or reciprocating is counted as one dynamic sealing point. 2. Statistical criteria for static seal points: One joint of a static seal point is counted as one static seal point. For example, a pair of flanges, regardless of their size specifications, counts as one sealing point. A valve is generally considered to have four sealing points; if there is a plug behind the valve or if it is immediately followed by a vent, one additional point should be counted for each of these. A threaded union counts as three sealing points. Special areas such as the bolt holes of the connection flanges are connected to the interior of the equipment; aside from the joint surface which serves as one sealing point, each bolt hole requires its own sealing point. 3. Criteria for counting leakage points: One leakage is counted as one leakage point; whether it occurs at a sealing point or due to weld cracks, porosity, corrosion, or other reasons, it is all included in the count of leakage points. Formula for calculating the leakage rate: Leakage rate = (Number of leakage points / Number of static seal points) × 1000 (0/00). III. Inspection criteria for dynamic and static seals: (1) Inspection criteria for static seals: 1. At the joints of equipment and pipelines, there should be no coking, smoking, leakage marks, seepage traces, or dirt visible to the naked eye. 2. For instrument equipment and the conduits for steam and air, leak checks are carried out using soapy water at the welding points and other connection areas; no bubbles should be present ； For vacuum areas, use thin paper strips in a straight manner. 3. At the joints of electrical equipment such as transformers, oil circuit breakers, and oil-impregnated paper insulated cable ends, there should be no leaks visible to the naked eye. 4. For the oxygen, nitrogen, and air systems, check with soapy water to ensure there are no bubbles. 5. Steam system: no leaks and no scale visible to the naked eye. 6. For chemical systems such as acids and alkalis, there should be no seepage marks, no leakage traces, no scaling, no smoke when observed with the naked eye; or the precision test paper used for leak testing shows no color change. 7. For water and oil systems, a macroscopic inspection or manual touch should reveal no leaks or scale. 8. Various gearboxes, vertical shafts, and speed control levers of different machine tools show no obvious leakage upon visual inspection. Areas without seals, such as slide blocks and guide rails, are not subject to statistics or evaluation. (II) Inspection standards for dynamic seals: 1. Slight oil leakage is allowed from the crankcase covers of various reciprocating compressors and from the bearing shells of turbine compressors, but it must be wiped clean regularly. 2. For various types of reciprocating compressor packings and turbine compressor gas seals, no leakage is allowed at the beginning of operation, while slight leakage is permissible by the end of the operating interval. Various oil injectors can allow for slight leakage, but they must be wiped clean regularly. 3. Bearings equipped with oil rings in various transmission devices must not leak oil, while bearings that require lubrication can allow slight leakage, which should be wiped clean at all times. 4. Initially, the permissible leakage rate for pump packings should be no more than 60 drops per minute. 5. For all types of pumps that use mechanical seals, no leakage is allowed at the beginning of operation, and the leakage rate should not exceed 60 drops per minute at the end of operation. 6. If a water pump leaks in the form of a stream of water, it is considered to be a device with severe leakage. (III) Standards for oil leakage from production equipment 1. Oil seepage: It is considered oil seepage when there are no visible oil stains, and no oil stains reappear within 5 minutes after the area has been wiped clean. 2. Oil leakage: Obvious oil stains are present; in some cases, oil droplets form. If oil stains or droplets reappear within 5 minutes after being wiped off, it is considered oil leakage. 3. Oil leakage point: A location with a visible oil trail or an oil drop constitutes a leakage point. 4. Oil-proof equipment: Equipment that is oil-proof, with no leakage at both the static and dynamic joints. 5. General oil leakage equipment: Equipment that exhibits oil leakage but to a degree that is not severe is considered general oil leakage equipment. 6. Equipment with severe oil leakage: Any equipment where the number of oil drops per minute at a single leak point exceeds 3 drops is considered to have severe oil leakage. I. Criteria for a functional centrifugal pump 1. It operates normally with good efficiency. (1) The pressure and flow rate are stable, and the output meets the requirements of normal production or exceeds 90% of the capacity indicated on the nameplate ； (2) The lubrication and cooling systems are unobstructed; oil cups, bearing housings, level gauges, etc. are all present and in good working condition. The selection of lubricating oil (grease) complies with the regulations. The bearing temperature meets the design specifications ； (3) Operates smoothly without any noise; vibrations meet the standard requirements ； (4) No obvious leakage at the shaft seal: Packing seal leakage: No more than 20 drops per minute for light oil ； Heavy oil should not exceed 10 drops per minute. Mechanical seal leakage: Light in nature, not exceeding 10 drops per minute ； Heavy oil: no more than 5 drops per minute. 2. The internal components are undamaged and their quality meets the requirements. The material used for the main components, the radial and axial runout of the rotor, as well as the fit between various components, along with the wear limits, must all comply with the specified regulations. 3. The main unit is clean, and all accessories are complete and functional. (1) The pressure gauge should be calibrated regularly to ensure it is accurate and up to standard. The control and self-start interlock systems are sensitive and reliable. Safety guards, wheel screws, latch pieces, etc. are all available and functional ； (2) The structure is complete; the fixing bolts, water drainage trays, etc. are all present and functional ； (3) The foundation and pump base must be sturdy and intact; all anchor bolts and connecting bolts should be fully threaded, neatly arranged, and tightly secured ； (4) The inlet valve, as well as the pipelines for lubrication and cooling, are installed properly, in a horizontal and vertical position, with no blockages or leaks. The check valve is flexible and easy to use ； (5) The pump body is clean, with intact and attractive insulation and painting ； (6) The auxiliary equipment is in good condition. 4. The technical documents must be complete and accurate; they should include (1) equipment records that comply with the requirements of the head office’s equipment management system ； (2) Regular status monitoring records (major equipment) ； (3) Equipment structure diagram and diagrams of vulnerable parts. II. Standards for the proper condition of centrifugal compressors
1. Normal operation and good performance
(1) The equipment’s output meets the requirements of normal production, or reaches at least 90% of the rated capacity stated on the nameplate ； (2) The lubrication system, oil sealing system, cooling system, gas seals, balance pipes, etc., are unobstructed and in good working order. The lubricating oil and sealing oil used meet the specified requirements. The temperature of the sliding bearings or rolling bearings is within the specified limits ； (3) The high-level tanks for lubricating oil and seal oil, the axial displacement control system, the anti-surge measures, as well as the pressure and flow controls and the oil and gas differential pressure controls are all complete and functional. The alarm and shutdown controls should be sensitive and accurate ； (4) The operation is smooth without any noise; the shaft displacement complies with design specifications, and the vibration meets standard requirements. 2. The internal components are undamaged and meet the quality requirements. (1) The material used for the components meets the design specifications ； (2) The radial and axial runout of the rotor, the fit of various components during installation, and the wear limits must all comply with the regulations. 3. The unit is neat, with all necessary accessories available and functional. (1) Pressure gauges, vacuum gauges, tachometers, thermometers, sensors, vibration probes, and safety devices should be calibrated regularly to ensure accuracy and reliability. The safety guards, coupling components, and turning gear are all available and in good working condition ； (2) The structure is complete; the fixing bolts, waste discharge systems, and water release valves are all present and in good working condition ； (3) The foundation and base should be solid and intact; the anchor bolts and all connection bolts must be fully tightened, in proper alignment, and securely fastened ； (4) The import and export pipelines, valves, and associated piping are installed properly, with no blockages or leaks ； (5) The machine should be clean, with no signs of impact, banging, scraping, or biting on its internal and external surfaces; the paint should be intact and in good condition. 4. The technical documentation must be complete and accurate; it should include (1) equipment records, in compliance with the requirements of the head office’s equipment management system ； (2) Regular status monitoring records ； (3) Regular lubricant analysis records ； (4) Equipment structure diagram and diagrams of vulnerable components. III. Criteria for the proper condition of centrifugal fans: 1. Normal operation with good efficiency. (1) The equipment’s output meets the requirements of normal production, or reaches at least 90% of the capacity indicated on the nameplate ； (2) The lubrication system and cooling system are in good working condition, and the lubricating oil used meets the specified requirements. The bearing temperature does not exceed the design specifications ； (3) It operates smoothly without noise, and the shaft displacement and vibration are within the specified limits ； (4) The anti-surge system should be sensitive and reliable. 2. The internal components must be free from damage, and their quality must meet the required standards. The selection of key components, as well as the radial and axial runout of the rotor, the fit between various components, and the wear limits, all must comply with the specified regulations. 3. The main unit is neat, with all accessories available and functional. (1) Pressure gauges, vacuum gauges, temperature sensor, vibration measurement probes, guards, wheel screws, pins, etc. are all present and in good working condition ； (2) The structure is complete, with positioning pins, vent valves, etc. all present and in good working condition ； (3) The foundation and base should be solid and intact; the anchor bolts and all connection bolts must be fully tightened, properly aligned, and secure ； (4) The inlet and outlet valves, as well as the lubrication and cooling systems, are properly installed with no leaks ； (5) The body is clean, with intact and attractive paint. 4. The technical documents must be complete and accurate; they should include (1) equipment records that comply with the requirements of the head office’s equipment management system ； (2) Regular status monitoring and analysis records ； (3) Equipment structure diagram and diagrams of vulnerable parts. IV. Standards for the proper condition of tubular heating furnaces 1. Normal operation with good efficiency (1) The equipment’s efficiency meets the requirements for normal production or reaches over 90% of its designed capacity, but it must not be operated beyond its capacity limits ； (2) The indicators for flow rate, temperature, pressure, etc. in each section are accurate and sensitive, with flexible control; there is no severe coking or pressure buildup ； (3) The furnace tubes show no local overheating, cracks, bulging, or expansion of the tube diameter, and the bending of the furnace tubes is within acceptable limits ； (4) The burner is free of coking and blockage. The automatic detection instruments ensure precise control; the “three valves and one panel” are flexible and easy to use ； (5) The furnace body is airtight with no severe air leakage, and the outer wall temperature meets the design requirements ； 2. The furnace body and its internal components are free from damage, and their quality meets the requirements. (1) The material of each component, as well as the wall thickness of the elbow fittings and furnace tubes, and the quality standards for expansion joint installation must comply with the relevant regulations. Pressured and heated components such as hangers and tube sheets show no fractures or severe deformation ； (2) There is no severe damage or peeling of the furnace walls and linings.
3. The main body is clean, and all components are present and in good working condition.
(1) The furnace body, convection section, ducts, and foundation are intact, with no significant tilting or cracks. Bolts at all locations are fully threaded, neatly arranged, and tightly fastened, meeting the equipment’s seismic requirements ； (2) Pressure, temperature, and flow meters should be calibrated regularly; safety measures such as sight holes, explosion-proof doors, access doors, fire suppression systems, emergency venting, and lightning protection grounding must be complete and reliable ； The lighting facilities are complete and functional ； (3) Import and export pipelines, valves, elbows, welds, and the combustion system are free of blockages and leaks ； (4) The installation of auxiliary pipelines is reasonable; all connections should be fully threaded, neat, and securely fastened ； (5) The auxiliary facilities of the furnace body are tidy, with complete and aesthetically pleasing insulation and painting. 4. The technical documents must be complete and accurate; they should include (1) equipment records that comply with the requirements of the head office’s equipment management system ； (2) Equipment structure diagram and diagram of detachable accessories. V. Standards for the sound condition of towers
1. Normal operation with good efficiency
(1) The equipment’s efficiency meets the requirements for normal production or conforms to the design specifications ； (2) Indicators such as pressure, pressure drop, temperature, and liquid level are accurate and sensitive, with flexible adjustment, and remain within the allowable range ； (3) All entrances, exits, downcomers, etc. are unobstructed. 2. The components are free from damage and their quality meets the requirements. (1) Corrosion on the tower structure and its components should be within acceptable limits, and no major components inside the tower have fallen off ； (2) The tower structure, components, lining, and welds have no defects exceeding specified limits, and there is no detachment of internal components ； (3) The materials of all components inside and outside the tower, as well as their installation quality, shall comply with the design and installation technical requirements or regulatory provisions. 3. The unit is clean and well-equipped with all necessary accessories. (1) Safety valves and various instruments should be calibrated regularly to ensure they are sensitive and accurate ； (2) Safety facilities such as fire protection lines, vent lines, and emergency vent lines are complete and in good working condition; lighting facilities are adequate and in proper order. Valves in all areas operate smoothly without any internal leaks, and lightning protection and grounding measures are reliable ； (3) Ladders, platforms, and railings are intact and secure. Insulation is intact; paint is complete and good-looking. Static seal with no leakage ； (4) Foundation, steel structure. The skirt foundation is firm, with no uneven settlement. All fasteners are properly installed and secure, meeting seismic requirements. 4. The technical documents must be complete and accurate; they should include (1) equipment records that comply with the requirements of the head office’s equipment management system ； (2) Equipment classified as pressure vessels must obtain a pressure vessel use license ； (3) Diagrams of equipment structure and vulnerable components
VI. Standards for the sound condition of shell-and-tube heat exchangers
1. Normal operation with good performance
(1) The equipment’s efficiency meets the requirements of normal production, or it can achieve at least 90% of its designed capacity ； (2) There is no leakage in internal components such as tube bundles; there is no severe fouling or vibration. 2. All components are free from damage and their quality meets the requirements. (1) The materials used for various parts and accessories should comply with the design specifications, and their installation should adhere to the relevant regulations ； (2) The erosion and corrosion of the shell and tube bundle are within acceptable limits, and the number of blocked tubes in the same tube side does not exceed 10% of the total. (3) The partition has no severe twisting or deformation. 3. The main body is neat, with all components present and functional. (1) The main body is neat, and its insulation and painting are in good condition and look attractive ； (2) The foundation and supports are intact and secure; all bolts are properly fitted, aligned, and tightened, meeting seismic requirements ； (3) There are no leaks in the shell components, as well as in various valves, flanges, front and rear end caps, etc ； (4) Accessories such as pressure gauges, thermometers, and safety valves should be calibrated regularly to ensure accuracy and reliability. 4. The technical documents must be complete and accurate; they should include (1) equipment records that comply with the requirements of the head office’s equipment management system ； (2) Equipment that falls under the category of pressure vessels must obtain a pressure vessel use license ； (3) Equipment structure diagram and diagrams of vulnerable parts. VII. Standards for the integrity of pressure storage tanks (1) The product nameplate and registration nameplate are complete and clear ； (2) The materials used for pressure vessels shall comply with the provisions of Chapter 2 of GB150-89 “Steel Pressure Vessels”, and also with the provisions of Chapter 2 of the “Regulations on Safety Inspection of Pressure Vessels by the Ministry of Labor” ； (3) The tank shows no severe deformation, cracks, or bulges; the degree of corrosion is within acceptable limits. Pressure storage tanks with defects such as cracks, lack of fusion, or incomplete penetration (exceeding allowable limits) that cannot be rectified may be put into service only after a safety assessment analysis confirms that they are “fit for service” ； (4) The supports are secure, the foundation is intact, with no unevenness or settlement. Bolts are fully threaded, neatly arranged, and tightly fastened, meeting the equipment’s seismic requirements ； (5) The storage tank shall not operate under overpressure, overtemperature, or overload conditions ； (6) For storage tanks with an inner lining and external insulation, the outer insulation covering the inner lining must be in good condition, without any cracks or peeling. 2. All accessories are present and function properly. (1) Safety valves should be regularly calibrated and inspected to ensure they are sensitive and reliable. (2) Pressure gauges, level gauges, wall temperature sensors, and vent valves (for storage tanks operating at high temperatures) must all be available and in working order ； (3) Grounding, lightning protection, and anti-static measures must be complete, and regular inspections should be carried out ； (4) Fire-fighting, safety, and sprinkler facilities are intact. 3. The tank is clean and well-protected against corrosion. (1) The tank is clean, and its painting, insulation, or heat-resistant coatings are in good condition and meet relevant regulations ； (2) There are no leaks at the connections such as the manholes and inlet/outlet valves of the storage tank ； (3) The corrosion of the tank and its accessories is within the allowable range. 4. The technical documents must be complete and accurate; they should include (1) equipment records that comply with the requirements of the head office’s equipment management system ； (2) Pressure Vessel Use License ； (3) Equipment structure diagram and diagrams of vulnerable parts. VIII. Standards for the integrity of storage tanks at normal pressure 1. The tank body is intact, and its quality meets the requirements. (1) The tank body shows no severe deformation; the degree of corrosion in all areas is within acceptable limits, and there are no leaks ； (2) There is no uneven settlement of the tank foundation, and the inclination of the tank meets the specified requirements ； (3) The floating roof tank is well-sealed and can be raised and lowered freely; there are no signs of aging, cracking, or loss of elasticity in the seals. 2. Complete accessories and flexible usability (1) The breathing valve, sealing gauge port, ventilation pipe, drain hole, upper and lower inlet/outlet ports, drain valve, heating coil, level gauge, etc. are all present and functional, with no blockages or leaks ； (2) The fire protection and lighting facilities are complete, in compliance with safety and explosion-proof regulations; the grounding resistance is less than 10 ohms, and the lightning protection and anti-static facilities are in good condition ； (3) Floating roof tanks must be equipped with high liquid level alarms and automatic air supply valves. The ventilation holes are functional and easy to use. 3. The tank is clean and well-protected against corrosion.
(1) The internal anti-corrosion coating shows no signs of peeling; the external insulation and paint are intact and aesthetically pleasing ； (2) The tank is clean; the drain wells should have water seals and be unobstructed, while the insulation wells are clean and covered ； (3) There are no leaks at the inlet and outlet valves and access holes; all bolts are fully tightened, in proper alignment, and securely fastened. 4. The technical documents must be complete and accurate; they should include (1) equipment records that meet the requirements of the company’s equipment management system ； (2) Storage tank capacity table ； (3) Records of foundation settlement tests (for volumes over 500 m³) ； (4) Equipment structure diagram and vulnerable parts diagram. IX. Standards for the integrity of steam turbines 1. Normal operation with good efficiency (1) Able to be brought into operation at any time, delivering a continuous output that meets the values specified on the nameplate or those approved by higher authorities, and operating properly under loads under various design conditions ； (2) The thermal efficiency reaches the design level or the average advanced level of similar domestic units ； (3) The unit vibration meets the acceptable standards. Among them, the outward vertical direction meets good standards. The oil quality, temperature, and pressure meet the requirements of relevant regulations ； (4) The integrity of the vacuum system, the vacuum level of the condenser, the exhaust steam backpressure, and the temperature difference between the upper and lower cylinders – all such operational parameters meet the requirements specified in relevant regulations. 2. The internal components are undamaged and the quality meets the requirements. (1) The stationary and rotating blades as well as nozzles are intact; erosion and corrosion are minor. The clearances between the stationary and rotating parts are within the specified range. The frequency of the rotating blades is within acceptable limits, or even if it is not, no issues such as blade deformation or breakage have occurred despite long-term operation ； (2) There are no defects in major components such as cylinders, rotors, diaphragms, and bearings that could affect safe operation ； (3) The dynamic and static characteristics of the control system comply with the relevant regulations ； (4) The measuring instruments for differential expansion, axial displacement, back pressure, and the temperatures of the inner and outer walls of the cylinder are complete, accurate, and reliable. 3. The main unit is neat, with all accessories present and functional. (1) All various protection devices and signaling devices are in good condition and operate correctly ； (2) Various automatic control devices can be put into use at any time ； (3) The steam turbine unit is properly insulated, with no leaks; the equipment and its surrounding area are clean, the lighting is adequate, and all necessary signs and labels are present in full and correctly placed ； (4) All heaters in the heating system are operating normally. The inspection rate for pressure vessels is 100%, and the repair rate is also 100%. 4. The technical documents must be complete and accurate; they should include (1) equipment records that comply with the requirements of the head office’s equipment management system ； (2) Condition monitoring records ； (3) Equipment structure diagram and diagrams of vulnerable components. X. Standards for a sound boiler 1. Normal operation with good efficiency (1) It is capable of maintaining the output specified on the nameplate or the output approved by higher authorities, and can be put into operation at any time, with an annual equivalent availability rate of over 90% ； (2) The efficiency reaches the design level or the average advanced level of similar boilers in the country ； (3) The main parameters such as steam temperature, steam pressure, steam quality, and furnace negative pressure meet the requirements specified in the regulations ； (4) The flue gas temperature and oxygen content at the boiler’s rated output meet the requirements of relevant regulations. 2. The internal components are undamaged and meet the required quality standards. (1) The steam drums, header tanks, and heat-exchanging surfaces show minor corrosion and wear, with normal tube creep ； (2) Protection signal devices such as safety doors, explosion-proof doors, water level alarms, and fire protection systems are in good condition and operational, with reliable operation. The safety door is airtight and meets the requirements of the “safety regulations”. (3) The main automatic control devices for steam temperature, steam pressure, feedwater, combustion, etc. are safe and reliable, and are in normal operation ； (4) The furnace wall has no major defects, good thermal insulation, and the heat loss is basically in line with national standards. 3. The main unit is neat, with all necessary accessories available and functional. (1) All components and accessories are present; the main instruments such as those for measuring steam pressure, steam temperature, carbon dioxide levels, water level, flow rate, furnace negative pressure, flue gas temperature, and water level are in good condition and accurate ； (2) The main steam pipes, feedwater pipes, supports and hangers, insulation, etc., within the boiler area are intact. The metal material and creep expansion of the high-temperature and high-pressure main steam pipes comply with regulatory requirements ； (3) The feedwater pipes associated with the main steam pipes within the boiler scope shall be inspected regularly, with a repair rate of 100%; moreover, the welds must remain free from any major defects ； (4) The pipelines for steam, water, smoke, air, and the combustion system connected to the boiler itself are installed properly. Leakage ≤0.5%0. All bolts shall be fully tightened, properly aligned, securely fastened, and meet local seismic design requirements ； (5) The equipment retains its original appearance, free from dust and dirt; the paint is intact and aesthetically pleasing. There is adequate lighting, and color rings, flow direction arrows, and serial numbers are all present. 3. The technical documents must be complete and accurate; they should include (1) equipment records that comply with the requirements of the headquarters’ equipment management system ； (2) Safety technology logbook or usage registration certificate ； (3) Status monitoring records ； (4) Cross-sectional drawings of the boiler, drawings of vulnerable spare parts. XI. Standards for a proper motor 1. Normal operation with good efficiency (1) The output can consistently meet the requirements specified on the nameplate or those approved by higher authorities, with the current remaining within acceptable limits ； (2) The temperature rise is within the allowable range for different grades of insulating materials ； (3) The vibration of each component shall meet the requirements specified in the relevant departmental regulations ； (4) There should be no sparks during the operation of the slip rings and commutators. 2. The structure is complete and the quality meets the requirements. (1) Preventive tests must pass ； (2) The coil, core, and slot wedges are not loose ； (3) The protective devices shall meet the design requirements, have accurate setting values, and operate reliably ； (4) Explosion-proof motors used in explosion-proof areas shall meet the requirements of explosion-proof regulations. 3. The unit is tidy, with all accessories present and functional. (1) The area around the motor is clean; the nameplate on the casing is clear, and there is an on-site identification number ； (2) The cable does not leak oil, and its installation complies with standards ； (3) The air cooler operates efficiently and can meet the temperature requirements of the motor ； (4) The interlock devices, grounding devices, and other accessories of the motor are complete and in good working condition. At the site of important, large-sized electric motors, there should be an emergency stop button. 4. Technical documentation must be complete and accurate. It should include:
(1) Equipment records that comply with the head office’s documentation management requirements ； (2) Maintenance and test records ； (3) Operation records of high-voltage motors. XII. Standards for the integrity of measuring and control instruments 1. The performance of these instruments should be such that they provide sensitive responses, accurate measurements, and stable control (sensitivity, accuracy, stability). (1) The basic errors, hysteresis, and overall appearance of the instruments must meet the technical requirements specified for that type of instrument ； (2) The output signals of the regulator and primary instruments vary uniformly, with no significant oscillations; the indication error between the primary and secondary instruments meets the accuracy requirements ； (3) For regulators with integral action, their static error shall meet the corresponding technical requirements ； (4) The range selection of the measuring instruments shall comply with the technical specifications. The indicated value of the flow rate is 30% or more of the full scale range (flow scale) ； (5) The interlock protection system can provide automatic protection in the event of an accident. 2. The repair, assembly, and calibration of instruments are of high quality and meet technical requirements.
(1) All components operate normally and are well-lubricated, meeting the respective technical specifications ； (2) Explosion-proof instruments meet the relevant technical requirements ； (3) Pressure-bearing instruments that have been disassembled for maintenance must undergo a pressure endurance and static pressure error test ； (4) The sealed parts of the instrument must undergo a leak test as specified ； (5) The paper feed time error meets the corresponding technical requirements. 3. The installation and maintenance of the complete set of instruments (including sensing elements, wires, instrument cabinets, and accessories) meet the required standards. (1) The installation complies with technical specifications; the wires are arranged neatly, the pipelines are horizontal and vertical, the bends are smooth, they are firmly fixed, there are no leaks in the pipelines, and the signal wires are properly shielded and grounded ； (2) The table body is neat, the nameplate is clear, with no obvious defects; all components are complete, without severe damage or rust ； (3) The records are printed clearly with distinct colors; the recording pen does not clog or leak, and ink flows smoothly. The recording paper meets the requirements ； (4) The scale markings of the instrument, as well as the letters, numbers, and symbols on the scale plate, should be distinct and clear, and must not be dirty or damaged. The scale should meet the requirements. Legal measurement units shall be used for all measurements. I. The scales of the primary and secondary instruments are consistent ； (5) The output ammeter and pressure gauge supplied with the transmitter should be in good condition, and their accuracy should meet the required standards. 4. Technical documentation is complete and comprehensive, with clear records. The documents should include (1) the complete set of automatic control design drawings for the installation ； (2) Instrument automatic control flow diagram ； (3) Schematic diagrams and wiring diagrams of the self-protection interlock systems for production equipment, large-scale units, etc ； (4) Instrument installation wiring diagram and complex control circuit diagram ； (5) Throttling device calculation table ； (6) Instrument signal alarm and interlock protection setpoint data table ； (7) Instrumentation equipment records ； (8) Installation and operation manual, verification records, installation wiring diagram.