Discussion on the requirements for providing steel plate certification documents for the weekly topic

Article 10 of the “Regulations on Safety Supervision of Pressure Vessels” stipulates that the quality and specifications of materials used for pressure vessels must comply with the corresponding **standards and industry standards. The production of pressure vessel materials is approved by **safety supervision agencies. The material manufacturer shall provide the user with a quality certificate (the original) in accordance with the relevant standards, and shall affix clear and durable stamp marks or other identifiers in a readily visible location on the material. These identifiers should include at least the code for the material manufacturing standard, the material grade and specifications, the furnace (batch) number, a mark recognized by the safety supervision authority, the name of the material manufacturer, and an inspection seal mark or other identifiers. The content of the material quality certificate must be complete and clear, and it must bear the quality inspection seal of the material manufacturing unit. When a pressure vessel manufacturing unit obtains materials for pressure vessels from a non-material production unit, it shall obtain either the original quality certificate for the materials or a valid copy stamped with the inspection seal of the material supplier and the signature of the responsible person. The pressure vessel manufacturing unit is responsible for the authenticity and consistency of the pressure vessel materials obtained as well as the material quality certificates. Article 11: When selecting materials for pressure vessels, in addition to mechanical properties and bending strength, compatibility with the medium must also be taken into consideration. The phosphorus content (as determined by melting analysis, the same applies hereafter) of steel dedicated for pressure vessels should not exceed 0.030%, and the sulfur content should not exceed 0.020%. When pressure vessels (except glass-lined pressure vessels) are manufactured using carbon steel boiling steel plates and carbon steel killed steel plates, they shall comply with the provisions of GB150 \"Steel Pressure Vessels\". Carbon steel boiling steel plates and Q235A steel plates shall not be used to manufacture pressure vessels that are directly exposed to flame heating.

This post was last edited by ray1513 on 2011-7-8 at 16:14; take some time to review the materials