Detail of GB/T 37190-2023

Introduction of GB/T 37190-2023

Pipeline corrosion control engineering life cycle - General requirements 1 Scope This document specifies the general requirements for various elements in the life cycle of corrosion control engineering. It is applicable to all types of corrosion control engineering programs. 2 Normative references There are no normative references in this document. 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 pipeline corrosion testing and monitoring system technology for real-time testing and feedback of corrosion or damage in and out of pipelines to avoid accidents 3.2 temporary decommissioning system shutdown due to unexpected events (such as natural disasters, corrosion and leakage). Note: After the emergency is handled, the pipeline can resume normal operation. 3.3 permanent decommissioning permanent shutdown of the system Note: Systems with major technical and economic risks found through rigorous program evaluation will not be used any more. 4 General principles 4.1 This document takes all factors in the whole life cycle of pipeline corrosion control engineering as the object, and puts forward general requirements for the selection of technical standards and management standards. This document does not specify specific technical and management procedures for pipeline corrosion control. 4.2 A traceable and supportive management system should be established for each element to achieve overall control and continuous improvement of pipeline corrosion control engineering life cycle. 5 Objective 5.1 All elements of pipeline corrosion control engineering life cycle shall be optimized and mutually coordinated. The life cycle of pipeline corrosion control engineering should be adapted to the life cycle of protected pipeline. 5.2 The objectives of corrosion control engineering shall be communicated, implemented, and maintained in all aspects of pipeline life cycle. The objectives shall be regularly reviewed and improved to ensure their suitability. 6 Corrosion sources 6.1 Corrosion sources include: - Internal corrosion sources, including but not limited to pipeline transmission medium, flow rate, temperature, pressure, etc. ; - External corrosion sources, including but not limited to environmental factors and corrosive medium which react with pipeline in different environmental conditions; - New corrosion sources in the operation of pipeline, including but not limited to cathodic disbonding, maintenance and electrochemical corrosion caused by replacing pipeline of different materials etc. ; - Corrosion sources caused by changing working conditions, which include both conditions of the main program and corrosion control engineering. Example: Cathode screening caused by cathodic protection current overload. 6.2 All of corrosion sources shall be identified by referring cases and corresponding standards according to the requirements of the life cycle of pipeline. Note 1: for the atmospheric corrosion of pipeline, refer to ISO 9223 Note 2: for the corrosion of buried pipeline, refer to EN 12501-1. 7 Pipeline materials 7.1 Pipeline shall be selected based on corresponding inspection standards. Example: the selection of pipeline in petroleum and natural gas industries may refer ISO 13623. 7.2 The pipeline selection principles should be followed: - The selecting pipeline and its applied environment should be researched and investigated, to ensure the corrosion resistance as well as green environmental protection. - Consider the processability, applicability and economy on the basis of satisfying application requirement. 7.3 The selection of pipeline shall follow the procedures: - Carry out the field survey of corrosion in the applied pipeline environment. Ensure the corrosion sources, parameters and grade; - Select appropriate pipeline to satisfy the corrosion resistance by referring the corresponding standards and manuals. - Evaluate the resistance of pipeline. In the condition of lacking of similar engineering and application, the stimulation tests in laboratory or field analysis shall be the reference to select pipeline. - Consider the applicability and durability prior to economy on the basis of guaranteed working life. 7.4 The selected pipeline shall be reviewed and assessed by specific procedures, documented and archived 8 Technology 8.1 One or more appropriate technologies shall be implemented for pipeline corrosion control according to the corrosion sources. Technologies include but not limited to: - Rational design of structural processes: insulation technique, the installation of electrical isolation points and isolation devices, the detailed integrated plan of sleeve, facilities and other electrical affected zone, prevention of unpredicted corrosion, such as cathode screening or cathodic disbanding, etc. ; - Coating protection: select coating which adapt the expected operation conditions and feasible construction process. The economy and environmental protection shall also be considered; - Electrochemical protection: evaluate the total cost and current density which is required to fully polarize the pipeline to protect against corrosion, or current using in cathodic protection; - Corrosion inhibitor: fully investigate the cause of the internal corrosion and the chemical property of pipeline transmission medium; select optimal type, frequency and dose; evaluate the cost; - Cleaning: include chemical and physical cleaning. The type and amount of collected feculence should be analysed in order to inspect the control effect and ensure the frequency of pigging; - Environment protection: adopt environment-friendly pipeline corrosion control and construction technology in priority; - Composite technology: adopt composite pipe technology without electrochemical corrosion in priority. 8.2 The selection of pipeline corrosion control technologies shall be based on the corresponding technical standards or specifications which have been through comprehensive evaluation, with the following principles: - Consider the safety of the operation of corrosion control engineering in priority and evaluate whether the safety requirement can be satisfied. - Based on the satisfaction of technical requirement, advanced technology, process, facility and material should be adopted in priority with the consideration of minimizing the corrosion control cost. - Selected pipeline corrosion control engineering technology should satisfy the adaptability of operation condition, and ensure green, long-term operation. - The risk and hazard of pipeline corrosion control technical failure shall be considered. The possible risk and hazard shall be expected to manage to minimize the possible loss. Note: for risk management technology, see ISO 31000. 8.3 The selected technologies shall have corresponding specific performance and supportive cases as reference, otherwise it shall be verified by corresponding experiment. 8.4 Under the premise of meeting the requirements of protected pipeline, the selected technology and other elements shall be coordinated and optimized with each other, achieving the optimum benefits of safety, economy, long-term operation and environmental protection. 8.5 The selected technologies shall be reviewed and assessed by certain procedures. The recorded files shall be documented and archived. 9 Design 9.1 All elements, links, nodes and corresponding corrosion risks in the entire life cycle of the pipeline corrosion control program should be systematically designed according to the pipeline operating environment and transportation medium. 9.2 Design should follow the principles: - Protect environment and save energy. - The site of pipeline engineering shall avoid environment with interference factors, such as populated region, highway, railway, river, power lines, etc. The appropriate interval between the pipeline and environment shall be set. The physical space shall not be occupied or replaced. - Optimize the design with key material, facility and process according to specific corrosive environment. Determine the most reasonable and economic design scheme. - New technology, process, facility and material can be selected. - Pipeline corrosion control engineering design for reconstruction and extension project shall rationally utilize the old facilities. - The life of serviceable or replaceable materials and devices can be shorter than the life cycle of main pipeline; the life of unserviceable and unreplaceable materials and devices shall consist with the life cycle of main pipeline. 9.3 A green plan for permanent decommissioning, scrapping and disposal shall be developed at design stage. 9.4 The applicability of the design system shall be evaluated in accordance with the objectives of safety, economy, long-term operation and environmental protection, and the design system shall be improved constantly to meet the requirements of main project. 9.5 The design documents shall be reviewed and assessed by certain procedures, and formed documented and archived files.

Contents of GB/T 37190-2023