Regarding the scope of application of TSG21-2016 Solid Volume Regulations
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This post was last edited by 311yj on 2023-4-15 at 16:46. Scope of application of TSG21-2016 Regulations on Fixed Pressure Vessels: These regulations apply to pressure vessels that meet the following conditions simultaneously: (1) Operating pressure ≥ 0.1 MPa； (2) Volume ≥ 0.03 m3 and inner diameter ≥ 150 mm ； (3) The medium contained is gas...... If a device meets conditions (1) and (3) but not condition (2), and if its volume exceeds 0.03 m3 while its inner diameter is less than 150 mm (for example, using a steel tube with an outer diameter of 159 mm and a wall thickness of 5 mm as the cylinder, resulting in an inner diameter of 149 mm, which is less than 150 mm). Do such devices require supervision and inspection?
According to the provisions of TSG21-2016, if a device meets both (1) and (3) but not condition (2), that is, if its volume is greater than 0.03 m3 and its inner diameter is less than 150 mm, then such device does not require supervision and inspection in accordance with these regulations. It should be noted, however, that the device must also meet the requirements of other relevant regulations and standards to ensure its safe operation. .
All 3 conditions must be met simultaneously
It falls outside the scope of the fixed capacity regulations, but still needs to comply with other relevant design, manufacturing, and inspection standards
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The conditions you have provided are insufficient; all conditions must be met in order to determine whether it falls under regulatory oversight. Specific examples would be helpful. If conditions 1 and 3 are satisfied, and condition 2 is met by using steel pipes, then this constitutes a pressure pipeline
TSG 21-2016 applies only to fixed pressure vessels within its specified scope; the rights and obligations related to supervision stem from laws, with the most relevant one being the \"Law of the People’s Republic of China on the Safety of Special Equipment\". To determine which devices fall under the category of special equipment, one must refer to the \"Catalogue of Special Equipment\" and search systematically from top to bottom; trying to find the answer by starting from a middle point alone will never yield the correct result.
Theoretically, no supervision is required, but since its volume exceeds 0.03 cubic units and its diameter is 149 mm, this is clearly an attempt to take advantage of the rules; it is recommended to use a tube with a diameter of 139.7 mm