【Q&A Question 283】2017.10.11

1. Operating normally with good efficiency: (1) The equipment’s efficiency meets the requirements for normal production or reaches over 90% of its designed capacity, but it should not be operated under overload conditions； (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 localized 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 from coking and blockage. The automatic detection instrument provides accurate control, and the “three doors and one panel” setup is 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 of the expansion joint installations must comply with the regulations. Compression and heating-induced components such as hangers and tube sheets show no fractures or severe deformation ； (2) The furnace walls and linings show no severe damage or detachment. 3. The main structure is in good condition, with all components present and functional. (1) The furnace body, convection section, ducts, and foundation are intact, with no significant tilting or cracks. The bolts in all areas are fully tightened, properly aligned, and secure, 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 protection systems, emergency venting facilities, 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 attached pipelines are installed properly; all connections should be secure, neat, and tightly fastened ； (5) The auxiliary facilities of the furnace body are tidy, with complete and aesthetically pleasing insulation and painting. 4. The technical documentation must be complete and accurate; it should include (1) equipment records that comply with the requirements of the head office’s equipment management system ； (2) Equipment structure diagram and pull-out accessory diagram.

It is running normally with good performance. Flow rate, temperature, pressure are all normal, etc.

1. Operating normally with good efficiency. (1) The equipment’s efficiency meets the requirements for normal production or reaches over 90% of its designed capacity, but it should not be operated under overload conditions；   (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 localized 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 from coking and blockage. The automatic detection instrument provides accurate control, and the “three doors and one panel” setup is 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 of the expansion joint installations must comply with the regulations. Compression and heating-induced components such as hangers and tube sheets show no fractures or severe deformation ；   (2) The furnace walls and linings show no severe damage or detachment. 3. The main structure is in good condition, with all components present and functional. (1) The furnace body, convection section, ducts, and foundation are intact, with no significant tilting or cracks. The bolts in all areas are fully tightened, properly aligned, and secure, 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 protection systems, emergency venting facilities, and lightning protection grounding must be complete and reliable ； The lighting facilities are complete and functional ；   (3) The import and export pipelines, valves, elbows, welds, and combustion system are free of blockages and leaks ；   (4) The attached pipelines are installed properly; all connections should be secure, neat, and tightly 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 pull-out accessory diagram.

1. Running normally with good performance； 2. The furnace body and its internal components are undamaged, and the quality meets the requirements ； 3. The main unit is neat, with all components present and functional ； 4. The technical documents are complete and accurate

1. Operating normally with good efficiency (1) The equipment’s efficiency meets the requirements for normal production or reaches over 90% of its designed capacity, but it should not be operated under overload conditions；    (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 localized 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 from coking and blockage. The automatic detection instrument provides accurate control, and the “three doors and one panel” setup is 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 of the expansion joint installations must comply with the regulations. Compression and heating-induced components such as hangers and tube sheets show no fractures or severe deformation ；     (2) The furnace walls and linings show no severe damage or detachment. 3. The main structure is in good condition, with all components present and functional. (1) The furnace body, convection section, ducts, and foundation are intact, with no significant tilting or cracks. The bolts in all areas are fully tightened, properly aligned, and secure, 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 protection systems, emergency venting facilities, 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 attached pipelines are installed properly; all connections should be secure, neat, and tightly fastened ；    (5) The auxiliary facilities of the furnace body are tidy, with complete and aesthetically pleasing insulation and painting.    4. The technical documentation must be complete and accurate; it should include (1) equipment records that comply with the requirements of the headquarters’ equipment management system ；    (2) Equipment structure diagram and pull-out accessory diagram.

1. Normal operation with good efficiency: a. The equipment’s efficiency meets the requirements for normal production or reaches over 90% of its designed capacity, but it should not be operated under overload conditions； b. The parameters such as flow rate, temperature, and pressure in each section are accurate and sensitive, with flexible control, and there are no serious issues of coking or pressure buildup ； c. 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 ； d. The burner is free from coking or blockages; the automatic detection instruments provide accurate control, and the “three doors and one panel” mechanism is flexible and easy to use ； e. The furnace body is airtight with no serious 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: a. The material of each component, as well as the wall thickness of elbows and furnace tubes, and the standards for expansion joint installation, must all comply with the relevant regulations; pressure-bearing and heat-exposed components such as suspension elements and tube sheets show no signs of fracture or severe deformation ； b. The furnace walls and lining show no severe damage or detachment. 3. The main structure is neat, with all components present and in good working condition: a. The furnace body, convection section, flue, and foundation are intact, without any significant tilting or cracks ； All bolts are fully tightened, properly aligned, and securely fastened, meeting the equipment’s seismic requirements ； b. Pressure, temperature, and flow meters should be calibrated regularly to ensure sensitivity and accuracy ； Safety measures such as fire viewing ports, explosion-proof doors, manholes, fire protection systems, emergency venting, and lightning protection grounding are all complete and reliable ； The lighting facilities are complete and functional ； c. The import and export pipelines, valves, elbows, welds, and combustion system are free of blockages and leaks ； d. The auxiliary pipelines should be installed properly; all bolts must be fully tightened, in proper alignment, and securely fastened ； e. The furnace body and associated facilities are clean, with intact and aesthetically pleasing insulation and painting. 4. The technical documents must be complete and accurate, and should include: a. Equipment records that meet the requirements of the equipment management system in petrochemical enterprises ； b. Equipment structure diagram and vulnerable parts diagram.

1 Operating normally with good efficiency. 2 The furnace body and its internal components are undamaged, and their quality meets the requirements. 3 The overall structure is tidy, and all components are available and in good condition. 4 Technical documents are complete and accurate

It shall meet the standard requirements of the Specification for Tubular Heating Furnaces, Code No.: 5-39355.

1. Operates normally with good efficiency. 2. The furnace body and its internal components are undamaged, and the quality meets requirements. 3. The overall structure is tidy, and all components are present and functional. 4. The technical documentation is complete and accurate

⒈Operating normally with good efficiency: (1) The equipment’s efficiency meets the requirements for normal production or reaches over 90% of its designed capacity, but it should not be operated under overload conditions； ⑵The indicators such as flow rate, temperature, and pressure in each section are accurate and sensitive, with flexible control, and there are no serious issues of coking or pressure buildup ； ⑶The furnace tubes show no local overheating, cracks, bulging, or expansion of the tube diameter, and the bending of the tubes is within acceptable limits ； ⑷The burner is free from coking or blockages, and the automatic detection instruments provide accurate control; the \"three doors and one panel\" system is flexible and easy to use. ⑸ The furnace body is airtight with no serious air leaks, and the temperature of its outer wall meets the design specifications. ⒉The 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 elbows and furnace tubes, and the standards for expansion joint installation, must all comply with the relevant regulations; pressure-bearing and heat-exposed components such as hangers and tube sheets show no signs of fracture or severe deformation. ⑵There is no severe damage or detachment of the furnace walls or lining. ⒊The main body is neat. All components are present and in good working condition: (1) The furnace body, convection section, flue, and foundation are intact, with no severe tilting or cracks ； All bolts are fully tightened, properly aligned, and securely fastened, meeting the equipment’s seismic requirements ； ⑵Pressure, temperature, and flow meters should be calibrated regularly to ensure sensitivity and accuracy ； Safety measures such as fire viewing ports, explosion-proof doors, manholes, fire protection systems, emergency venting, and lightning protection grounding are all complete and reliable ； The lighting facilities are complete and functional ； ⑶Import and export pipelines, valves, elbows, welds, and the combustion system are free of blockages and leaks ； ⑷The auxiliary pipelines are installed properly; all bolts should be fully tightened, in proper alignment, and securely fastened ； ⑸The furnace body and associated facilities are clean, with intact and aesthetically pleasing insulation and painting. ⒋The technical documents must be complete and accurate, and should include: (1) equipment records that comply with the requirements of the equipment management system in petrochemical enterprises; (2) diagrams of the equipment structure as well as diagrams of the vulnerable components.