As long as the pressure vessel that has passed the supervision and inspection is qualified, it must have a CS mark to prove that the pressure vessel is a product that has passed the supervision and inspection. The absence of CS mark means that the pressure vessel has not been supervised and inspected and is not allowed to be used as a pressure vessel.
Extended data:
The supervision and inspection of the safety performance of pressure vessel products, commonly known as the supervision and inspection of pressure vessel manufacturing, is a compulsory inspection of pressure vessels according to the provisions of the Safety Law of Special Equipment and the No.22 Supervision and Management Measures for Boiler and Pressure Vessel Manufacturing issued by the AQSIQ. The purpose is to supervise the quality management and product quality of pressure vessel manufacturing enterprises and ensure the safety performance of pressure vessels.
The supervision and inspection shall be undertaken by the special equipment safety supervision agency of the provincial quality and technical supervision bureau where the manufacturer is located and the inspection agency authorized with corresponding qualifications. The specific requirements are clearly stipulated in the Rules for Supervision and Inspection of Safety Performance of Boiler and Pressure Vessel Products.
Including pattern review, material inspection, welding, appearance and geometric dimensions, nondestructive testing, heat treatment, pressure test, safety accessories, leakage detection, factory documents, product nameplate, etc. After all the supervision and inspection work is completed, the supervision and inspection institution will issue a supervision and inspection certificate.
The inspection work of supervision and inspection is still based on the inspection carried out by the production enterprises themselves, and the supervision and inspection units mainly review the inspection plans, inspection work instructions and inspection results of the production enterprises. At the same time, the supervision work shall be carried out in accordance with the Outline of Safety Performance Supervision and Inspection of Boiler and Pressure Vessel Products and the List of Safety Performance Supervision and Inspection Items of Boiler and Pressure Vessel Products.
Supervision and inspection did not consider the special requirements of special pressure vessels, and it was difficult to meet the special needs of special users.
References:
Baidu encyclopedia-pressure vessel supervision and inspection