1.1 Purpose
In order to ensure the safe operation of stationary pressure vessels, protect the safety of human life and property, and promote the development of national economy, this Supervision Regulations on Safety Technology for Stationary Pressure Vessels (abbreviated Regulation, hereinafter) is established in accordance with "Regulations on Satety Supervision of Special Equipment".
1.2 Stationary pressure vessels
Stationary pressure vessels refer to pressure vessels installed and operated at fixed
locations (hereinafter referred to as pressure vessels, see Note 1-1).
Note 1-1: Pressure vessels to be moved and/or used within the certain scope of the facility or plant field for a particular purpose, as well as air tanks in transportable air compressor units are jurisdicted by this regulation.
1.3 Applicable scope
This Regulation is applicable to stationary pressure vessels in conformity with all of the following conditions as a whole:
(1) The working pressure is equal to or greater than 0.1 MPa (Note 1-2);
(2) The product of working pressure and volume is equal to or greater than 2.5 MPa•L (Note 1-3);
(3) The medium is gas, liquefied gas or liquid which maximum working temperature is equal to or greater than its standard boiling point (Note 1 -4).
In which, utra-high pressure vessels shall be in accordance with "Super-high Pressure Vessel Safety and Technical Supervision Regulation"; Nonmetal pressure vessels shall be in accordance with "Nonmental Pressure Vessels Safety and Technical Supervision Regulation "; simple pressure vessels shall be in accordance with "Simple Pressure Vessels Safety and Technical Regulation ".
Note 1-2 Working Pressure, refers to the maximum pressure (guage pressure) possibly occurred on the top of a vessel at normal working conditions.
Note 1-3 Volume, refers to the geometrical room of the pressure vessel, namely the volume calculated based on the dimensions of the design drawings and after roundness (tolerance is not considered). In general, the volume of the internals permanently amounted inside the pressure vessel could be deducted.
Note 1 -4 This Regulation is also applicable to the vessel when the maximum operating temperature of the containing liquid lower than its standard boiling point, meanwhile, the product of the vapor space volume and the working pressure is equal to or greater than 2.5MPa•L.
1.4 Special provisions for applicable scope
Users shall be responsible for the safety management of their pressure vessels subject to this Article according to the service management provisions of this Regulation.
1.4.1 Pressure vessels satisfying the General Requirement, Design, and Fabrication only
Under the applicable scope of this Regulation, the following pressure vessels with
volume no less than 25L are required to satify the provisions of only Chapter 1, Chapter 3 and Chapter 4.
(1) Air tanks for transportable air compressor units, for which "Supervision Regulations on Safety Technology for Simplel Pressure Vessels "are not applicable.
(2) Non-independent pressure vessels of cryogenic installations, pressure vessels of direct-fired absorption refrigeration equipments, aluminum plate-fin heat exchangers, and pressure vessels in cold boxes of air separating units.
(3) Jacketed heat exchangers, spiral plate heat exchangers, and brazing plate heat exchangers.
(4) Air compressed hydraulic tanks used for hydraulic auto-pneumatic water feeding devices (water feeding without tower), air and water feeding by air pressure (foam) compressed tanks used for extinguishing devices;
(5) Pressure vessels used for ion exchange or filtration process in water treatment equipments, water expansion tanks used for hot-water boilers;
(6) Fully enclosed electric apparatus (capacitance pressure vessels) used for power industry only;
(7) Tire vulcanizers and pressed rubber moulds used in rubber industry;
(8) Accumulators affiliated to machines
1.4.2 Pressure vessels conforming to General Requirement, Design and Manufacture Licensing only
A pressure vessel with its volume greater than 1L and less than 25L or its inner diameter (for non-circular cross sections, refer to the maximum geometric dimension of the inside boundary in the crosssection, such as, the diagonal for a rectangle, the major axis for an ellipse) less than 150mm shall only satify the provisions in General Requirement, Article 3.1 and Article 4.1.1, and the design and fabrication shall satify the requirements of corresponding product standards.
1.4.3 Pressure vessels satisfying General Requirement and Manufacture licensing only
Pressure vessels with volume no greater than 1L shall satify General Requirement and Article 4.1.1 only; also, the design and fabrication of above vessels shall satify the corresponding product standards.
1.5 Non-applicable scope
This Regulation is not applicable to pressure vessels as following:
(1) Transportable pressure vessels, gas cylinders and hyperbaric oxygen chambers;
(2) Heat recovery boilers within the scope of the supervision regulations on safety technology for boilers;
(3) Vessels with normal operating pressure less than 0.lMPa (including vessels under instantaneous pressure no less than 0.lMPa during feeding or discharging processes);
(4) Pressure containers that are as integral parts or components of rotating or reciprocating mechanical devices, such as shell of pumps, shell of compressors, shell of turbines, hydraulic cylinders, etc;
(5) Disassemble spacer plate heat exchangers (including semi-weld plate heat exchangers), air-cooling heat exchangers and cooling pipes.
1.6 Definition of pressure vessel scope
The jurisdiction scope of this Regulation covers pressure vessel bodies and safety accessories of pressure vessels.
1.6.1 Body of the pressure vessel
The main body of a pressure vessel is defined as following:
(1) The bevel surface of the first circumferential joint between a pressure vessel and external pipes or devices connected by welding, the first threaded joint with screwed connections, first flanged sealing surface with flanged connections and the first sealing surface with special connectors or pipe connectors;
(2) Pressure covers and their fasteners of the openings of pressure vessels;
(3) Connection welds between non-pressure parts and pressure vessels.
Main pressure components in a pressure vessel body include shells, heads (end plates), expansion joints, equipment flanges, petals of a spherical tank , tubesheets and tubes of a heat exchanger; main bolts greater than M36 (including M36) in specification, nozzle and pipe flanges with diameter no less than 250mm.
1.6.2 Safety accessories
Safety accessories of pressure vessels, include safety valves directly connected with pressure vessels, rupture disk devices, emergency shut-off devices, safety interlock devices, pressure gages, liquid level gages, and thermometric instruments, etc.
1.7 Catogeries of pressure vessels
Depending on the dangerous grade, pressure vessels applicable to this Regulation are classified into three categories so as to facilitate the supervision and administration.
See Annex A for classifications of pressure vessels.
1.8 Inter-relationship with technical standards and management rules
This Regulation specifies the essential safety requirements of pressure vessels. Involved technical standards and management rules of pressure vessels, as a minimum, shall satisfy the requirements of this Regulation.
1.9 The rule for handling inconformity to this Regulation
Provide pressure vessels constructed with new material new technology, new process
and/or its special service conditions not meet the requirements of this Regulation, involved enterprises/institutes shall submit the technical documentations involving the foundation, data, results, as well as inspection and testing reports of the design, research, and experiment to General Administration of Quanlity Supervision, Inspection and Quarantine of P.R.China (abbreviated AQSIQ). Technical organizations or technical institutes entrusted by AQSIQ shall carry out technical evaluations and assessments. When the results of evaluations and assessments are approved by AQSIQ, pressure vessels with new material, new technology or new process can be put in trials for fabrication and service.
1.10 Quoted Standards
Main standards quoted in this Regulation are as follows (Note 1-5):
(1) GB 150 Steel Pressure Vessels;
(2) GB 151 Tubular Heat Exchangers;
(3) GB 12337 Steel Spherical Tanks;
(4) JB/T 4710 Steel Tower Tanks;
(5) JB/T 4731 Steel Horizontal Tanks;
(6) JB 4732 Steel Pressure Vessels- Design by Analysis;
(7) JB/T 4734 Aluminum Welded Vessels;
(8) JB/T 4745 Titanium Welded Vessels;
(9) JB/T 4755 Copper Pressure Vessels;
(10) JB/T 4756 Nickel and Nickel Alloy Pressure Vessels.
Note 1-5: For standards quoted in this Regulation with the year note, both their amendent sheets (not including contents of corrections) and revisions do not apply to this Regulation. Ones without the year note, their latest versions apply to this Regulation.
1.11 Supervisory administration
(1) The design, fabrication (including field assebly welding, same as below), installation, alteration, maintenance, service, inspection, and testing of pressure vessels shall implement the provisions of this Regulation accordingly;
(2) All parties involved with the design, fabrication, installation, alteration, maintenance, service, inspection, and testing of pressure vessels shall follow the related regulation of information management for special equipment, and input required data into the information systems in time;
(3) AQSIQ and local quality technical supervision departments are in charge of the safety supervision of pressure vessels as well as monitoring the implementation of this Regulation.
1 General Requirement
2 Material
3. Design
4． Fabrication
5. Installation, Alteration and Maintenance
6. Service Management
7. Periodic inspection
8. Safety Accessory
9. Supplement
ANNEX A CLASSIFICATIONS FOR CATEGORIES, PRESSURE CLASSES, AND SORTS OF PRESSURE VESSELS
ANNEX B PRODUCT COMFORMITY CERTIFICATE OF PRESSRUE VESSELS
ANNEXED TABLE B PRODUCT DATA SHEET OF PRESSURE VESSELS
ANNEX C PRODUCT NAMEPLATE OF PRESSURE VESSELS
ANNEX D CODE NUMBERING METHODS OF SPECIAL EQUIPMENTS
