One, two, three categories are based on the design pressure and PV value, the nature of the medium, etc. to divide, focusing on the description of the vessel's danger, and welding, flaw detection, closely linked.
ABCD mainly from the structure of the points
Pressure vessel manufacturing license level division?
Level?A?Manufacturing pressure vessel range: ultra-high-pressure vessels, high-pressure vessels (A1); the third category of low and medium-pressure vessels (A2); spherical tanks on-site group welding or spherical shell plate manufacturing (A3); non-metallic pressure vessels (A4); medical oxygen tank (A5)?
Representative products:?A1 should indicate single-layer, forged and welded, multi-layer wrapped, banded, heat-sleeved, plate-wrapped, seamless, forged, controlled and other forms of construction?
Level?B?Manufacture of pressure vessels: seamless cylinders (B1); welding cylinders (B2); special gas cylinders (B3) Representative products:?B2 Note with (limited) dissolved acetylene cylinders or liquefied petroleum gas cylinders. B3 Note motor vehicles, winding, non-repeat filling, vacuum adiabatic cryogenic cylinders, etc.
Level?C?Manufacture of pressure vessels: railroad tankers (C1); automobile tankers or long tubes, etc.
Level?C?Manufacture of pressure vessels: railroad tankers (C1); automobile tankers or long tubes, etc.
Level?C? ); automobile tank cars or long tube trailers (C2); tank containers (C3)?
Level?D?Manufacturing pressure vessels range: the first type of pressure vessels (D1); the second type of low and medium pressure vessels (D2)?
Note: 1.? One, two, three types of pressure vessels are divided in accordance with the "Pressure Vessel Safety Technology Supervision Regulations" to determine;?
2. Ultra-high-pressure vessels: design pressure greater than and equal to 100MPa pressure vessels; high-pressure vessels: design pressure greater than and equal to 10MPa and less than 100MPa pressure vessels; medium-pressure vessels: design pressure greater than and equal to 1.6MPa and less than 10MPa pressure vessels; low-pressure vessels: design pressure greater than and equal to 0.1MPa and less than 1.6 MPa pressure vessels. Low pressure vessel: design pressure greater than and equal to 0.1MPa and less than 1.6MPa pressure vessel.
3. Pressure vessels designed in accordance with the analytical design standards, the manufacturer should hold a class "A" or "C" license.
4. The project of spherical shell plate manufacturing includes all types of heads with diameter more than and equal to 1800mm.
5. For manufacturing enterprises with single product type, the scope of license should be restricted, such as restricting the product or manufacturing method, material, type, use, etc.
6.
Vessel Classification
Overview of Pressure Vessel Classification
There are many ways to classify pressure vessels, and from the point of view of use, manufacture and supervision and inspection, there are several.
(1) according to the level of pressure to bear is divided into: low-pressure vessels, medium-pressure vessels, high-pressure vessels and ultra-high-pressure vessels.
(2) According to the medium contained is divided into: non-flammable, non-toxic; flammable or toxic; highly toxic.
(3) according to the role of the process is divided into:
①reaction vessel: used to complete the physical and chemical reaction of the medium of the container.
② heat transfer vessel: used to complete the medium of heat exchange vessel.
③ Separation vessel: used to complete the medium of mass exchange, gas purification, solid, liquid, gas separation vessel.
4 storage and transportation containers: used to contain liquid or gas materials, storage and transportation of media or pressure to balance the buffer role of the container.
Basic classification method
Pressure vessels should be classified in accordance with the characteristics of the medium, in accordance with the following requirements to select the classification diagram, and then according to the design pressure p (unit MPa) and volume V (unit L), mark the coordinates of the point, to determine the container category:
(1) For the first group of media, pressure vessels, classification, see Figure A-1.
(2) For the second group of media, pressure vessels, the classification is shown in Figure A-1. Group II media, the classification of pressure vessels is shown in Figure A-2.
Figure A-1 Pressure Vessel Classification Chart - Group I Media
Figure A-2 Pressure Vessel Classification Chart - Group II Media
Multi-Cavity Pressure Classification
Multi-Cavity Pressure Vessels (e.g., tube and shell courses of heat exchangers, Jacketed vessels, etc.) in accordance with the category of high pressure chamber as the category of the vessel and according to the category of use management. But should be in accordance with the respective categories of each pressure chamber design, manufacturing technology requirements. Classification of each pressure chamber, the design pressure to take the design pressure of the pressure chamber, the volume to take the geometric volume of the pressure chamber.
1. The same cavity with a variety of media container classification
A pressure chamber with a variety of media, according to the group of high media classification.
2. Medium content is very small container classification
When a hazardous substance in the medium content is very small, should be based on the degree of harm and its content of comprehensive consideration by the pressure vessel design unit to determine the medium group.
Special case classification
(1) Coordinate points are located in Figure A-1 or Figure A-2 on the classification line, according to the higher category to divide its category.
(2)For GB 5044 and HG 20660 two standards are not specified in the medium, should be based on the chemical nature, the degree of hazard and its content of comprehensive consideration, by the pressure vessel design unit to decide the medium group. (3) 1.4 of these regulations within the scope of the pressure vessel is uniformly divided into the first class pressure vessel.
Pressure Rating
Pressure vessel design pressure (p) is divided into low pressure, medium pressure, high pressure and ultra-high pressure four pressure levels:
(1) low-pressure (code L) 0.1MPa ≤ p & lt; 1.6MPa
(2) medium pressure (code M) 1.6MPa ≤ p & lt; 10.0MPa
< p>(3)High pressure (code H) 10.0MPa≤p<100.0MPa(4)Ultra high pressure (code U) p≥100.0MPa.
Reference: