SY/T 6517-2001 Protection against overfilling of storage tanks in petroleum facilities
Some standard content:
TCS 13.10
Alternative number: 9603—2001
Petroleum and natural gas industry standard of the People's Republic of China SY/T 6517--201
Overfill protection for storage tanksinpctraleumfacilities
2401 — 09 -24 Issued
National Economic and Trade Commission
2002-01-01 Implementation
SY/T 6517—2001
AP [Pre-school]
Strategy for the Contemporary Environment (STEP)
1 Introduction
1.1 Introduction
1.2 Basics
1.3 Definitions
1.4 General measures for all facilities
1.5 References
2 On-duty facilities
2.1 On-duty facilities for installation of detectors
2.2 Installation of depth detectors in on-duty facilities
3 Non-duty facilities
3.1 Installation of depth detectors in non-duty facilities
3.2 Installation of independent detection belts and flow or diversion systems in non-duty facilities
4 Written operating procedures
General written operating procedures
|Planning oil product reception…
Complete testing of electronic systems
Monitoring reception
Complete reception…
Emergency procedures and plans
Personnel responsibility and training
4.8 Testing, inspection and maintenance
4.9 Food status
Record A (Appendix for instructions)
Appendix B (Appendix for instructions)
Record (Appendix for instructions)
Installation of overfill protection system
Determine storage volume and oil grade
Overfilling protection device||t t||SY6517-2001
This standard is compiled based on the United States Petroleum Society standard AP1RP2350 for the storage of energy through trays. It is equivalent to it in technical content, and domestic oil companies and industrial units can use it according to specific conditions: This standard converts all the data and unit abbreviations of AFR\235 with the legal measurement units in China, and retains the original numbers and digits in the brackets behind it, so that readers can use it according to actual needs. Appendix A, Appendix B and Appendix C of this standard are all suggestive appendices. This standard is issued by the Petroleum Industry Safety Proposed by the professional standardization technical committee and returned to 1. This standard is from: Changqing Petroleum Dynamic Detection Equipment Monitoring Center This standard is drafted by Li Haishi Xu Feng
SY/T6517-2001
API Foreword
This standard is developed under the guidance of the American Petroleum Institute Safety and Fire Committee. API[RF2350 "Overfilling Protection of Petroleum Facilities" (First Edition) has been rewritten based on the American Petroleum Institute's Environmental Cooperation Strategy [SFFP) and other emergency protection methods, and therefore partially or completely replaces the previous version. Its appendix only provides enhanced science. This document includes all non-oil ground overfilling protection, including refineries, oil stations, large-scale receiving and receiving pipelines from oil pipelines and offshore engineering (flammable) pipelines, and does not include process tanks and storage tanks used for oil production activities. In developing this standard, API Safety and Fire Planners considered in detail the following issues related to overfilling protection for petroleum storage tanks: Safety and fire protection; Optimization of workplace and operating procedures; Inspection, testing and fall protection: Equipment and system selection and installation; Safety work and emergency operation procedures and training; and Change Management related to overfilling protection. All sections and attachments outside the text have been expanded. In addition, a summary of the meaning of the standard is provided to help people understand the new situation and the significance of the storage tank overfilling protection. Table 23 only includes overfilling protection and does not include other conditions related to ground storage, such as management of large diameter storage chains, storage fire protection, leakage control, drainage system APStd6S0. Other publications and standards include: The previous definitions of overfilling chain position, end filling oil level, and belt filling level have changed: The safe filling level is now the maximum allowable storage capacity and operating liquid level of the belt. The content of this publication is based on the basic safety practices and existing recommended standards. When formulating a quantitative filling protection plan for a storage facility, explicit consideration should be given to compliance with federal, state, and local rules and regulations to contain additional requirements. AH publications are available for use by anyone who wishes to perform them. The Society makes every effort to ensure the accuracy of the information contained in these publications, but the Society makes no representations, warranties, or guarantees concerning these publications. The Society expressly acknowledges its full responsibility and liability for any loss or damage caused by the use of these publications or for any violation of any state, municipal, or local ordinance that conflicts with the use of these publications. This publication is produced under the AP standardization process of the market planning completion process. It is an A standard. The information contained in the standard and the value contained in the operating procedures for the formulation of the standard are all included in the full text of the standard to obtain guidance and assistance from the shareholders:
APl (i22u L Steel, N.wWashir:glon, LL, 2005)SY/T 6517—2001
Contemporary Environmental Cooperation Strategy [STEP
The long-term trend of petroleum industry productivity is an environmental issue of concern to mankind. Recognizing this trend, the American Petroleum Institute (API) has developed a set of future-proof strategies called SIEPs - a collaborative strategy for the contemporary environment. The goal of this strategy is to collect information about the industry's environmental, environmental, and social relations, and to document the political and social impact of these actions. SIEPs are based on the American Petroleum Institute's environmental mission and environmental guidelines. The American Petroleum Institute's Environmental and Environmental Guiding Principles are the foundation of the Institute's environmental and environmental guidance principles. While rationally developing energy resources and providing consumers with high-quality products and services, the Institute is committed to We are committed to improving the environmental performance of our products, recognizing the importance of producing and using natural resources in a way that protects the health and safety of our employees and the community. To fulfill these responsibilities, American Oil will manage our business according to the following principles: · Respond to and recognize people's concerns about our raw materials, products and services, · Operate our plant equipment and facilities, and process our raw materials and products in a way that protects the environment, safety and the health of our employees and the community. .
, give priority to safety, health and environmental issues in the development of our projects, new products and technologies. · Promptly inform relevant governments, industries, customers and groups of information related to industry and major safety, health and environmental hazards, and recommend protective measures to them.
, provide customers, employees and other people who are working safely, with information on the use, transportation and disposal of our raw materials, products and waste materials.
· Combined development and production of natural resources, and conserve these resources through the economical use of energy. ■ Through the implementation of the Liechtenstein Plan for raw materials, To study and accumulate experience in the effects of products, processes and waste on safety, health and the environment.
Ensure that emissions of hazardous materials and the generation of pollutants are reduced. . Work with other supply departments to solve problems caused by handling and cleaning operations. . Participate in the activities of government and other institutions that formulate rules, regulations and standards for protecting the environment in areas, work areas or wastes.
■ Provide consultation and guidance to other persons who produce, handle, use, transport or clean similar raw materials, petroleum products and wastes to promote the implementation of these principles and methods: 1 Introduction
1.1 Introduction
Petroleum and Natural Gas Industry Standards of the People's Republic of China
Qrerfill protection for ktmrage tanksIn petroleum tacilitles
SY/T6517--20H1
The protection of petroleum storage tanks is closely related to safety and the environment. The safe operation of petroleum storage facilities depends on whether the filling is completed according to the intended capacity. The following measures can greatly reduce the frequency of overfilling: formulate and implement a feasible and complete operation program for the storage facility, carefully select and use equipment, formulate maintenance plans and train personnel. When providing storage and product protection, the main consideration is to minimize the possible environmental and safety risks, oil product loss, and damage to the tank and related areas. Because the danger level and the damage level increase with the increase in the risk of overfilling, in order to meet the requirements of the proposed overfilling auxiliary protection program, the more appropriate program should be used in the selected program: the program should include the use of training personnel, safe operating procedures and techniques, taking into account the need for completeness. This standard includes pre-activated programs and automatic systems that have been successfully used for overfilling protection. 1.2 Scope || tt || 1.2.1 Scope of application || tt || The scope of application of this standard is not limited to petroleum equipment that has the function of receiving oil from a self-propelled oil line or sea The standard does not apply to the following situations: 1. Ground storage tanks with a capacity of less than 2268T (600g); 2. Ground storage tanks receiving graded or staged liquids; 3. Ground storage tanks with a capacity of more than (0g); 4. Ground storage tanks containing non-flammable liquids or non-petroleum products; 5. Ground storage tanks containing graded liquids that do not come from oil lines or ocean tankers (for example, from storage trucks, train storage, from common facilities, dedicated pipelines and crude oil production facilities); 6. Underground storage tanks with a capacity of less than 2268T (600g); 7. Ground storage tanks containing graded liquids that do not come from oil lines or ocean tankers (for example, from storage trucks, train storage, from common facilities, dedicated pipelines and crude oil production facilities); 8. Underground storage tanks with a capacity of less than 2268T (600g); 9. Ground storage tanks containing graded liquids that do not come from oil lines or ocean tankers (for example, from storage trucks, train storage, from common facilities, dedicated pipelines and crude oil production facilities); 10.
1.2.2*Standards and NFPA30-1993-2, including its following requirements: 2-10.1 The buyer shall comply with formal written procedures when receiving "stimulant liquid" from the main line or onboard container. The following procedures shall be adopted to prevent positive and negative charge, etc.) During the reception of the product, the supplier or the supplier shall maintain a contact plan. The operator shall be provided with a separate high-liquid level detection device for each stack. The transfer system shall be equipped with an independent high-liquid level detection device capable of automatically switching the flow. The equipment used in place of the transfer system shall be capable of providing the same level of protection as that of the operator. The system shall be equipped with an electrical detection device or other equivalent method. 2-10.2 The following shall be included in the order or procedure of 2-10.1: a) whether the designated receiving liquid is correct and whether the corresponding detection method is to be started; b) the operator shall be provided with a high-liquid level detection device capable of automatically switching the flow. b) the operator shall be provided with an independent high-liquid level detection device capable of automatically switching the flow. c) the operator shall be provided with an independent high-liquid level detection device capable of automatically switching the flow. c) the operator shall be provided with an independent high-liquid level detection device capable of automatically switching the flow. c) the operator shall be provided with an independent high-liquid level detection device capable of automatically switching the flow. c) the operator shall be provided with an independent high-liquid level detection device capable of automatically switching the flow. c) The equipment and reduction of the rapid disease and test shall be designed and the relevant environment specifications, plans and procedures shall be followed. The inspection and test intervals shall be able to be carried out over time. The National Economic and Trade Commission 20K11-00-14 approved 20H02-01-01 implementation
Make the transfer and encouragement accepted, and do not mention the first production, SY/T6517-2001
Note: ". The above reprint has been approved by the National Institute of Standards and Technology (NIA). Our reprinted materials do not fully comply with the store drawings, and NIPA has recognized the selection of materials in the concept of scientific research. Only the instrument is suitable for the overall form of the standard technology in the selection. 1.3 Definitions
This standard uses the following definitions,
1.3.1 Dangerous shift implementation
When receiving the product on the oil tanker or offshore oil tanker, the continuous assignment on the installation Personnel must be on duty when receiving oil from a pipeline or ocean vessel. 1. There is no facility without designated personnel on duty when the oil is being received from an oil pipeline or ocean vessel. 1.3.2 Regulatory authority
The organization, body or person responsible for approving the equipment, installation and procedures. 1.3.3 Volume
The volume (number) of oil in the oil circulation chain that reaches the planned preset level. 1.3.4 Detectors and detection systemsbzxz.net
The terms related to detectors and detection systems are as follows: Dynamic detection group: The oil product sensor that triggers the initial alarm, that is, the initial alarm refers to the time when the operator confirms or supports the interception or diversion of the oil flow before the stored product reaches the required set level. b) Liquid level detector: The oil level in the single-stage and double-stage detector systems The sensor is used to determine the safe filling level above the filling level. It provides sufficient time for the oil flow to be diverted or diverted before reaching the designated filling level. Low-voltage oil sensor: A dual-stage detector system with a low-voltage oil sensor, if the container is full but below the level where the high-level detector is positioned. It triggers the first alarm signal to provide sufficient time for the oil flow to be diverted or diverted before the tank oil reaches the designated ultra-high level detection.
d) Single-stage detector system (ultra-high level detector): The ultra-high level detector in the single-stage detection system should be positioned above the safe filling level or the safe filling level, and the alarm/signal should be able to provide sufficient time for the oil flow to be diverted or diverted before reaching the designated filling level. Among the vehicle-level detectors, the first-level (high liquid level) detector is usually located! The filling liquid level must be above the dangerous filling liquid level, and the alarm signal is allowed to be sufficient time to allow oil cane to be diverted or diverted before reaching the safe state. The second-level (super-high liquid level) detector should be positioned at the safe filling liquid level or above the filling liquid level, and the alarm signal is allowed to be sufficient time in advance, and before reaching the specified liquid discharge, the dynamic flow of the flow is separated. Independent liquid level detector: an independent oil level sensor, which is independent of any automatic metering device on the reservoir. In single-stage and dual-stage detection systems, super-high level detectors are independent detectors. The high liquid level detector in the dual-stage detector system can be a separate detector. Method: 1. Use. The detector is optimized (the same measurement system is used, which is recognized as an equivalent furnace by the monitoring company when it is used, 1.3.5 Combustible gas reduction products
NFPA30-1993 defines the following liquid grades:) Class 1 liquid: a service liquid with a flash point below 3.8 (1) and a vapor pressure not exceeding 2757101'a (40lbf/product) [2468mmHg). b) Class 1 reduction products: flammable liquids with an open flash point greater than or less than 37.8 (100F) and less than 93 (200F), c) Class 1 reduction products: flammable liquids with a closed flash point greater than or less than 60 degrees (140) and less than 93 (200F). d) Digital temperature products: flammable liquids with a flash point greater than or greater than 93200F. 1.3.6 Oil pipeline
The pipeline from the refinery to the terminal and other facilities, excluding the general pipeline for transporting oil products within the plant facilities (except for the pipeline for transporting natural products through the ship). 2
1.3.7 Marine berth
SY/T6517—2001
The first evacuation of oil products to the oil facility storage (generally through the facility pipeline): 1.3.8 Normal filling position (normal capacity)
The storage reaching this position is allowed to receive the maximum amount of oil products before reaching the safe filling concentration. The predetermined time is based on the experience of the operating personnel with the facility and the storage tanks involved: the normal filling position is determined by the following two principles to avoid overfilling, a! Before the oil in the screen tank reaches the predetermined safe filling level, there is enough time for the dead flow to be completely discharged or separated (the filling level of the work belt & liquid level must not exceed the safe filling level in any case) The liquid level determined by the physical components of the storage (fullness, structural strength, etc.) or the operating procedures (for example, partial variable distribution oil leakage tolerance, etc.): The liquid level limit of the storage end should be equal to the safe filling level of the belt. 1.3.9 Operators
Recommended Operations VII. Replacement , supervisor or other designated person responsible for receiving oil from the oil transporter: 1.3.10 Underfilling level (maximum filling volume) The maximum filling level of the oil product in the storage tank. When the maximum filling point (i.e. full position) is reached, any additional standard product will be overfilled and out of the storage tank, or there will be contact or damage between the float and the storage structure or accessories. 1.3.11 Oil products
Grade liquid received from the main line or ocean tanker. 1.3.12 After the safe filling level (rated capacity of the tank) reaches the positive filling level, the actual tank level that is allowed to receive oil delivery is determined as the safe filling level. The safe filling level is always lower than the virtual filling level. The safe filling level is determined by the time required for the most appropriate action to completely intercept or divert the oil before the storage oil level reaches the excessive filling level. The safe filling level is determined by the operator for each specific tank according to the storage type, internal structure and conditions of the storage tank, and operating procedures.
Storage product liquid level
This level is determined by the operator based on the following considerations: a) Field experience and operating procedures for each particular end; b) Operating parameters of the throat and pipes;
C) Storage tank capacity and physical conditions;
d) Number of oil products transported;
e) Flow rate of oil products entering each tank. For the calculation of the amount of oil products transported to the storage end, please refer to Appendix A (Appendix on water extraction) and Appendix B (Appendix on reminders).
1.3.14 Storage and discharge meter table (record) is a table prepared by the operator of each storage tank, including the basic data related to the storage capacity, correct filling reduction, safe filling, overfilling and overfilling detector (see APIStd255) 1.3.15 Oil transportation personnel
When operating on the oil line or offshore oil tanker, the person responsible for the oil transportation operation. 1.3.16 Delivery operation
All activities related to the reception of oil products, including the interception and diversion of filling agent flow to prevent dust from passing through the storage tank (the degree can be 1 head, electronic, bubble can be other methods): 1.4 All facilities are used in one chapter
1.4.1 The following flow can be achieved to stop the screen from passing through the drum) to master the effective capacity and inventory of the existing storage hoop. 5) Carefully monitor and operate the oil delivery system. The effective capacity of the storage tank can be determined manually or automatically by the storage quality system. The monitoring and diversion sequence of the oil product flow can be provided by the basic filling and high and ultra-high liquid level detectors with temporary alarm/signal systems. The storage tank constitutes another method to prevent overfilling of the storage tank, and its application is the most important requirement of the operator. WARNING: High pressure flowmeters and/or automatic feed/distributor combs should not be used to control the filling of conventional tanks in storage chains containing graded liquids. The purpose of these devices is to signal the need for an emergency and to initiate certain manual or automatic functions.
NOTE: As noted in this specification, the detectors in the fuel level gauging system may be an integral part of the fuel level gauging system where they cannot be operated safely or without failure.
1.4.2 The normal fill level (positive capacity), safe fill level (reserve rated capacity) and overfill level (overfill level) shall be set and measured on the storage meter (or record) at each storage terminal in the facility covered by this standard, where manual operations are performed. Or where the system fails and automatic operations are required to make up for it, these levels shall also be at the storage meter and/or 1.4.2.1 To assist in arranging product reception, operators shall display the normal filling level (normal volume), safe filling level (maximum rated capacity of the storage tank), overfill level (maximum case volume) of each storage tank in the facility, as well as any other boundary heights on the storage meter, storage record sheet, computer record or instrument calibration line. It is helpful to provide this information to the relevant personnel. This information shall also be provided to the personnel in charge of the storage tank filling. 1.4.2.2 If there is no satisfactory calibration curve, the calibration error will be made on time. 1.4.2.3 The normal filling level (normal capacity) and safe filling level (maximum case volume) of the storage tank shall be recorded in the form of a storage end oil delivery or receiving table. 1.4.3 Before the receipt of oil, the storage tank designated to receive the oil should be measured manually by the operator, or measured by an independent automatic metering and measuring system to further verify whether the volume is sufficient to receive the expected amount of delivered oil. When determining the effective capacity of the oil, take into account any expected increase in capacity caused by increased moisture in the oil at the storage end. If appropriate, this information should be recorded in the form of storage or receiving forms and provided to the oil transfer personnel: Where metering and dating systems are used, regular inspection, maintenance and supervision of their integrity and performance are required. 144 All procedures for receiving and delivering oil from consumers should be kept in the facility's documents. The reasonable time for its maintenance shall be determined by the operator's policy, or Documents related to system inspection and maintenance shall be retained for at least one year (NFPA 30-1993 2-10.2) or longer when required by industry, regulation, or other regulatory agency. 1.5 References This standard references the following recommended practices and standards: National Institute of Flame-retardant Technology (NIF) AFIRP 500 Recommended Practice for Classification of Flame-retardant Installations APIRP 2003 Recommended Practice for Ignition of Stray Current by Electrostatic Stimulation APIRP 22 [Heat Induction Heat Dissipation Sequence for All-purpose Welding Equipment] APISAd 25S0 Measurement and Calibration of Vertical Belt-type Storage Facilities APT 52610 Design, Construction, Operation, Maintenance, and Inspection of Transfer Stations and Storage Chain Facilities NFPAI 30-1993 Specification for Flame-retardant and [FI] Liquid Flame-retardant Systems Prrk,D iny-nty
2 Duty facilities
2.1 The duty facilities of the detectors installed on the storage tanks SY/T6517-200
Note: The chapter should comply with the requirements of NFPA30-19932-10.1) 2.1.1 In the duty facilities, in order to prevent the technical installation of detectors on the storage tanks from overfilling, the operating personnel should, with the help of the transport personnel, prepare a card procedure for the reception, flow and diversion of consumables: this procedure shall be approved by the oil personnel. The requirements of 2.1.4 of this standard should include the following: 2.1.2 When receiving product from a truck, if necessary, a communication link should be established between the operator and the transport personnel to divert or split the oil flow. 21.3 After starting the oil delivery, the operator should immediately check the designated storage terminal for receiving the product to verify that the oil is flowing into the storage terminal and check whether the installed equipment is in working order. 21.4 When receiving the oil, the operator should regularly check according to the established equipment procedures to ensure that the product continues to flow into the designated storage terminal and that the remaining quantity is the amount of oil specified by the receiving terminal. When changing the product, the meter reading should be recorded.
2,1.5 When receiving products, operators should regularly inspect the tank site to ensure the integrity of the piping system, the fire dam and/or its bottle seal and drainage system, and ensure that no activities that may affect the acceptance of products occur. 2,1. Plan the filling to its normal filling position (normal capacity or above) and reach its rated capacity. The main operating personnel should select and certify the personnel with the ability to perform the task and be trained to go to the storage site. Note A1 It is not recommended to fill the tank to the safe filling position (rated storage capacity) because this will increase the risk of overfilling. 2.1.6, 1 When the storage is full of oil products and close to the safe filling position, the main operating personnel should select and certify the personnel with the ability to perform the task and be trained to go to the storage site. Note A1 It is not recommended to fill the tank to the safe filling position (rated storage capacity) because this will increase the risk of overfilling. When the oil storage tank is in the same position (the storage tank capacity is close to the constant volume disk), the personnel should continuously monitor the receiving temperature.
2.1.6.2 During this period, the personnel should contact the oil personnel by direct communication methods, and in case of emergency, promptly notify the oil transportation personnel to immediately cut off and divert the oil. 2.1.6.3 The monitoring should continue until the oil delivery is completed, all the flows have been cut off, and the auxiliary receiving valve has been closed. 2.1. In order to correct other emergencies, such as force shock or overpressure of the pipeline system, the cut-off or diversion sequence should also be suitable for the work requirements of the personnel.
2.2 The installation of the detector in the design specification
Note that the requirements of 2-10,1) in NFPA 3--193 are met. 2.2.1. Storage media in duty facilities do not require replacement damage detectors. Whether to install overfill protection facilities in duty facilities shall be determined by the operating personnel based on the evaluation of the following factors: 1) Facility location (i.e. storage location where overfilling may endanger residential or public areas); 2) Loading capacity; 3) Fire protection of storage tanks and inter-tank extraction; 4) Soil and groundwater killing equipment; 5) Pollution regulations; 6) Other factors affected by overfilling.
Note: The effective measurement should be recognized, accounting for more than 4 (15), equipped with a level of epidemic body: the storage device can induce overfilling, worthy of information source in a single-stage high-excitation position or a double-stage rapid high-position pool and a high-reduction detector, complex investment/information and digital chaos system in the government rate process or when the management is transferred and required, or with the hostage-taking rate of operation The interruption rate is based on the training of the health-free protection device is installed. The total installation in these situations and the straight-shift equipment is the ideal storage delivery 1.
2.3, 2 The location where the device is installed on the duty facility should meet the requirements of Chapter 3, and the table is equipped with a level depth sensor. The electric transformer is reduced and modified: the oil product reception is stopped, and it cannot be started again until the detector function is restored, or the manual actions and procedures are performed according to the provisions of 2.1,
3 Non-duty equipment
3.1 Installation of detectors in non-spot elimination equipment
SY/T 65172001
Note that this sheet complies with the requirements of NFTA30-1093, 2-10.1b). 3.1.1 During off-duty operations, the receiving of standard products shall not be monitored by personnel in the vicinity of the receiving storage facility. The flow of oil shall be rapidly controlled by a system equipped with a warning/information alarm. These alarms are activated by independent level sensors located in the receiving facility: these sensors send warnings to personnel at a distance so that timely and orderly storage or diversion can be carried out, thereby ensuring that the product is fully filled.
3.2 The delivery of standard products to off-duty facilities shall be monitored by a control center, operator, tanker or computer. 3.1.3 If a mechanical, electrical or other detection system fails, the receiving of oil shall be stopped immediately until automatic operations can be carried out in accordance with the provisions of 2.1.
3.1.4 Overfill level detectors in single or dual stage systems shall be designed so that the alarm/signal issued allows sufficient time for safe flow interception or diversion before overfilling occurs. The time required will depend on operating conditions and the system, including the flow diversion process.
3.1.4.1 Single stage detector (overfill and guard) system: When only one detector is used, the level of the secondary detector is equal to or greater than the safe filling level and the alarm signal issued provides sufficient time for safe flow interception or diversion before the overfilling level is reached.
3.1.4.2 Dual-stage detection (high and super-high level detectors) systems: In a dual-stage system, the first stage level detector shall be equal to or greater than the fill level and the alarm/signal shall allow sufficient time for flow interception or diversion when the safe fill level is reached, and the second stage super-high level detector shall be equal to or greater than the safe fill level and the alarm/signal shall allow sufficient time for flow diversion to occur before the specified fill level is reached. 3.1.5 When overfill prevention is used, the super-high level detector of the single-stage system and the super-high level detection solution of the dual-stage system shall be independent of the metering system to provide greater integrity and meet the requirements of NF430-1993, Part 2-0. NOTE: Modern equipment with integral computer software (not independent) can provide greater integrity for high and low level measurement. NFPA 431 permits the use of non-isolated alternative systems: however, these alternative systems must be approved by the authority having jurisdiction. 3.1.6 When a dual-stage (high-level and ultra-high-level) detector system is installed, at least one of the following requirements shall be met: a) If the tank automatic gauging is incorporated as a component of the high-level (first-stage) detector, a separate ultra-high-level (second-stage) detector shall be provided; b) Both the high-level (first-stage) and ultra-high-level (first-stage) detectors shall be independent of the tank automatic gauging system. Note: An alternative device with an integral computer component (not stand-alone) may provide greater integrity for detecting high and low levels. NFP 431 permits the use of non-isolated alternative systems. These improvement systems must be approved by the relevant competent authorities: 3.17. When installing the level system, the first level (high-pressure detection) can take effect when the oil flow avoids the screen and then reaches the predetermined liquid level, so as to provide enough time before reaching the second level (high-pressure detection) to intercept or divert the oil flow. 3.1.8 If the storage end is filled to the positive filling level (positive capacity) and reaches its safe filling level (rated capacity), the operating personnel or oil transportation personnel can select trained and responsible personnel to monitor the operation. If necessary, the oil flow or flow activities can be carried out to ensure the correct system.
Process: AP1 does not recommend charging the storage tank above the safe filling level (station rated load) as this increases the risk of overcharging.
3.1.8.1 During this period, in case of an emergency, the oil transfer personnel shall notify the oil transfer personnel by direct and non-transmittal means to immediately cut or divert the oil flow.
3.1.8.2 If the oil transfer personnel do not have a clear plan, they shall instruct the selected personnel to take immediate action within the facility to carry out SY/T6517--20E 3.1.9.3 Operation monitoring by the commanding personnel shall continue until the oil transfer is completed, all oil flows are blocked, and the storage and receiving systems are closed. It should be recognized that the ground flow with a diameter of more than 45?2m (150ft) containing the gas cylinder may produce dangerous noise that may induce overfilling. 3.1.9 In order to prevent other sudden events, such as hydraulic shock and system pressure drop, the interception or diversion procedure shall be consistent with the operations of the oil transfer personnel.
3.2 Installation precautions for independent detectors and automatic cut-off or diversion systems in off-duty facilities This requirement shall comply with the requirements of 210. of FP-1993. 3.2.1 The storage chain in the off-duty detection facility shall be equipped with an independent single-stage ultra-high liquid level or double-stage high and ultra-high liquid level detector system. When the product in the tank reaches the predetermined level, these systems can automatically start micro- or reverse oil batch operation. These systems can also be used to report the power failure of the detector system, reduce or divert the product, 3.2.2 The oil supply to the off-duty facility shall be continuously monitored by the computer of the control center: 3.2.3 Automatic control 3.2.1 When setting up an automatic interception system, each storage receiving or each storage chain valve group and the inlet valve of the sensing device and the group for controlling the oil product diversion should be equipped with an automatic operator. 3.2.41. The power operator can be operated by electric, hydraulic and compressed air methods: the opening has a disconnect function to allow manual compensation operations. .2.43 The team should be able to prevent the occurrence of dust and low hydraulic pressure or hydraulic shock during shutdown. The control system should require the operator and the oil transporter to agree on the shutdown items in advance. 3.2.4.3 The position indicator should indicate the operation status of both the position and the network. 3.2.5 The line system should be analyzed to determine whether a discharge system is needed to maintain the low pressure pipe. In order to prevent other sudden accidents such as hydraulic pressure or line system overpressure, the flow system should be The design and operation of the system or diversion system should be consistent with the work of the oil transporter.
3.2.6 When the oil received by the storage screen reaches the super-high level detection level of the single or grade system, the conventional automatic response system should have the following functions: a) If the system is activated by the operator, when the signal of the near high level detector or the super-high level detector is received, the system will stop immediately and start to close at a short speed. b) If the system is remotely closed, when the signal of the near high level detector or the super-high level detector is received, the system should close at a predetermined speed.
3.2.7 If the detector system has a mechanical or dynamic failure, the oil reception (or delivery) will stop immediately. At this time, the automatic reception operation should be restarted according to the requirements of 2.1: 4 Operating procedures
4.1 General operating procedures
4.1.1 To prevent overfilling, the operating personnel shall formulate the operating procedures. In this regard, the operating personnel shall coordinate and cooperate with the oil transportation personnel, and the air control personnel shall formulate the procedures and summarize the following requirements:) These procedures shall comply with 2-10.1 and 2-10.2 requirements, and also meet the corresponding federal, state and local regulations and requirements:
b) The operator's quality of work shall include the recognized industrial safety operation standards within this standard and its reference documents.
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