Supervision standards for pressure pipelines in chemical enterprises

Chapter 1 General Provisions Article 1 In order to ensure the safe, stable and long-term operation of pressure pipelines in chemical enterprises and protect the safety of people’s lives and property, these regulations are specially formulated. Article 2 This regulation applies to pipelines that meet the following conditions: 1. Inlet pressure Pw ≥ 0.1MPa; 2. Nominal diameter Dg ≥ 50mm; 3. Process pipelines for transporting chemical media and steam pipelines for chemical production. (For chemical pipelines with major hazards, the maximum working pressure is less than 0.1MPa or the nominal diameter is less than 50mm, please refer to the implementation.) This regulation does not apply to the following pipelines: 1. Non-metallic pipelines; 2. Instrument pipelines; 3. The equipment body belongs to Pipes; 4. Pipes with non-flammable media, non-toxic or mildly toxic media. Such as: water, air, inert gas, etc. The classification of the third pipeline is as follows: (omitted) 1. Pipes transporting extremely or highly hazardous toxic media are Class A pipelines 2. Alloy steel and 3d printing stainless steel pipes whose materials are flammable and combustible media and whose working temperature is greater than 450°C, the working temperature Carbon steel pipes with temperatures above 370°C are Class A pipes. ​

3. Pipes with an operating temperature higher than or equal to the autoignition point of the medium are classified as Class B pipelines. ​

4. The level of pipelines transporting Class A fire hazardous gases (lower explosion limit <10%) media should be upgraded to Level 2. ​

5. Pipelines transporting moderately hazardous toxic media, Class B fire hazardous gases (lower explosion limit ≥10%), and flammable liquid media with a flash point less than 28°C should be upgraded to one level. 6. Pipes with an original design corrosion rate greater than 0.25 mm/year should be upgraded by one level. ​

7. When the same medium is classified into different pipeline levels according to its characteristics (such as flash point and lower explosion limit), the higher level should prevail. ​

8. For mixed media, the medium with the greatest degree of harm shall be used as the basis for classification. ​​

Chapter 2 Organizations and Responsibilities Article 4 Chemical Industry Competent Departments at All Levels

1. Promote and implement relevant pressure pipeline technical standards, regulations and systems;

2. Supervise chemical enterprises in the region to strictly implement relevant regulations;

3. Gradually establish and improve the management ledger of pressure pipelines in the region;

4. Go through the registration procedures for the use of high pressure hot injection molding. ​

Article 5: Units using pressure pipelines

1. The technical person in charge of a chemical enterprise (factory director, chief engineer, etc.) shall be responsible for the safety and reliability of the unit’s pressure pipelines. ​

2. Equipment Management Department

1. Implement the standards, regulations and systems related to pressure pipelines;

2. Establish and improve the technical files of pressure pipelines;

3. Prepare rules and regulations for enterprise pressure pipeline safety management;

4. Participate in the installation, acceptance and commissioning of pressure pipelines;

5. Responsible for the inspection, repair, modification and scrapping of pressure pipelines;

6. Prepare annual inspection and repair plan for pressure pipelines and be responsible for its implementation;

7. Participate in the approval of changes in pressure pipeline process parameters;

8. Participate in safety technical education and training for relevant operators;

9. Participate in or organize pressure pipeline accident analysis;

10. Regularly submit the annual comprehensive report (Annex 1) of the unit’s pressure pipelines to the chemical industry authority (omitted). ​

3. Safety Management Department

1. Responsible for the supervision and inspection of the use and testing of 500 high temperature pressure spring;

2. Responsible for safety education, training, assessment and certification of pressure pipeline operations;

3. Responsible for organizing the analysis and handling of pressure pipeline accidents. ​

4. Production and use department

1. Implement regulations and technical standards related to pressure pipelines;

2. Develop relevant process operating procedures;

3. Operators must pass technical training, safety education and pass the assessment before they can take up the job;

4. Strictly implement the patrol inspection system;

5. Prepare the annual inspection plan for the department’s pressure pipelines;

6. Responsible for the use, management and maintenance of pressure pipelines;

7. Participate in the completion acceptance of pressure pipeline projects;

8. Participate in the investigation and analysis of pressure pipeline accidents. ​

Article 6: When a pressure pipeline user has objections to the quality and conclusions of pipeline construction and inspection, it may apply for arbitration to the superior authority. ​​​​

Chapter 3 Design

Article 7 Only units with chemical engineering design qualifications or pressure pipeline design qualifications can engage in pressure pipeline design within the scope of their qualifications. ​

Article 8 If the user has the conditions to design it by itself, it must obtain qualification approval from the provincial chemical industry department. ​​​

Chapter 4 Installation Article 9 Pressure pipeline installation units should have corresponding engineering construction qualifications or center pressure tension springs with round shackle construction qualifications. If the user unit has the conditions to carry out the construction by itself, it must obtain approval from the provincial chemical industry department.

Article 10: After the installation of a new pressure pipeline is completed, the management personnel of the user unit shall participate in the quality review and commissioning of the pressure pipeline project. ​

Article 11 The user shall inspect and accept the equipment in accordance with the corresponding standards or the provisions of GBJ235-82 “Construction and Acceptance Specifications for Industrial Pipeline Engineering” and GBJ236-82 “Construction and Acceptance Specifications for Field Equipment and Industrial Pipeline Welding Projects”. ​

Article 12 When the pipeline installation unit handles the handover procedures to the user unit, it must hand over all technical data and completion drawings of the pressure pipeline to the competent department of the user unit. ​​​

Chapter 5 Daily Management

Article 13 Registration of use

1. The user unit must complete the registration procedures before putting the pressure pipeline into use. Large enterprises are handled by provincial chemical industry departments (bureaus), and small and medium-sized enterprises are handled by prefectural and municipal chemical industry authorities. ​

2. Registration Scope

1. Pressure pipelines for new construction and reconstruction projects;

2. Pressure pipelines in use

(1) Registration of use of Class A and B pressure pipelines shall be handled in accordance with Paragraph 1 of Article 13;

(2) The registration procedures for the use of Class C and D pressure pipelines shall be handled by the relevant departments of the user units; 3. When the user unit goes through the procedures for the use of pressure pipelines, it must fill in the “Registration Form for the Use of Pressure Pipelines in Chemical Enterprises” (Annex 2) (omitted) ), and bring the following technical information documents. ​

1. New pressure pipeline

(1) Certificate of qualification for main components (pipes, valves, safety valves);

(2) Completion drawings; (3) Installation and delivery technical information. ​

2. Pressure pipelines in use

(1) Pressure pipeline inspection report;

(2) Main component quality report. ​

Article 14 File Management

1. Pressure pipeline files should be established based on devices or public pipelines, and managers should fill them out carefully, accurately and in a timely manner. ​

2. What should be included in the pressure pipeline technical file;

(1) “Registration Certificate for Pressure Pipeline Use of Chemical Enterprises” (Annex 3) (omitted);

(2) Relevant design information;

(3) Manufacturing and installation delivery documents, as-built drawings and aerial drawings; certificates of conformity for main components (pipes, valves, safety valves, etc.);

(4) Inspection records and inspection reports over the years;

(5) Repair and modification plans, approval documents, construction records and delivery documents;

(6) Safety accessories verification, repair and replacement records;

(7) Accident records and reports. ​

Article 15 Basic requirements for operation and maintenance

1. Position operators must hold a safe operation certificate to work;

2. Position operators must strictly implement operating procedures and make operational inspections and operation records;

3. Operators regularly conduct line inspections according to the route, use leak detectors to conduct inspections when necessary, and keep inspection records. ​

Article 16 If the following abnormal conditions occur in the pressure pipeline, the operator shall promptly report to the relevant departments of the unit and take emergency measures when necessary. ​

1. The working pressure, medium temperature or wall temperature of the pressure pipeline exceeds the allowable value, and measures cannot be taken to control it;

2. The pressure pipeline is frozen and blocked;

3. Cracks, deformation, and leakage occur in the pressure pipeline;

4. Safety accessories malfunction;

5. The valves and monitoring devices of the pressure pipeline are missing, endangering safe operation;

6. The occurrence of fire directly threatens the safe operation of pressure pipelines;

7. Serious vibrations in pressure pipelines endanger safe operation;

Article 17 Statistical Reports

The user unit should make regular statistical reports on pressure pipelines in accordance with the requirements of the chemical industry authorities. ​

content include:

1. Basic numerical statistics of pressure pipelines;

2. Regular inspection status;

3. There is a problem with the pressure pipeline;

4. Pressure pipeline accident statistics.

Chapter 6 Inspection

Article 18: Units using pressure pipelines shall strictly implement the “Inspection Procedures for high pressure die casting mixer metal parts of Chemical Enterprises” and prepare a periodic inspection plan for pressure pipelines in accordance with the inspection cycle and submit it to the competent department.

Article 19 Inspection units and inspectors of pressure pipelines must have corresponding inspection qualifications. ​

Article 20 Pressure pipeline inspection personnel shall conduct inspections in accordance with the requirements of the “Pressure Pipeline Inspection Regulations for Chemical Enterprises”, issue a “Pressure Pipeline Inspection Report”, and be responsible for the inspection results.