Requirements for steel plates used in stainless steel pressure vessels

GB4237 is not a steel plate specifically designed for pressure vessels; the requirements in GB150 specify that it should be specified as a vessel-grade plate at the time of purchase, in order to control surface defects. There are now specific standards for stainless steel plates used in pressure vessels; once the new GB150 is implemented, GB4237 will no longer be used.

Stainless steel usage standards? We all choose stainless steel based on its corrosion resistance

The new stainless steel sheets for pressure vessels have been put into use; the standard number is GB24511-2009 \"Stainless steel sheets and strips for pressure equipment\". Other standards are not recommended for use in pressure vessel design. The original poster must pay close attention.

GB24511-2009, Stainless steel plates and strips for pressure equipment, came into effect on June 1, 2010; in the draft of GB150, GB24511 replaced GB4237.

The current stainless steel plate standard for pressure vessels is only GB24511-2009.

Note: The Quality Supervision Bureau issued a notice recently outlining the technical requirements for stainless steel plates and strips used in pressure-bearing applications. The original poster might want to take a look at it; it seems to be Document No. 86.

Opinions on the Implementation of the Regulations on Safety Technical Inspection of Fixed Pressure Vessels Quality Inspection Special Letter [2010] No. 86 Opinions on the Implementation of the Regulations on Safety Technical Inspection of Fixed Pressure Vessels To the Quality and Technical Supervision Bureaus of all provinces, autonomous regions, and municipalities directly under the Central Government, as well as to all relevant organizations: The Regulations on Safety Technical Inspection of Fixed Pressure Vessels (hereinafter referred to as the Fixed Vessel Regulations) will see the end of its transition period on November 30, 2010, and will come into force officially on December 1, 2010. The following suggestions are put forward: First, regarding Material (1) on the GB/T4237-2007 standard materials. For inventory materials ordered in accordance with \"Hot-rolled stainless steel plates and strips\" (GB/T 4237-2007), each pressure vessel manufacturer shall compare their chemical composition, mechanical properties, etc., with the technical requirements specified in GB 24511-2009, based on the quality certificates or retest results. If they meet these requirements, such materials can be used weiterhin in the manufacture of pressure vessels. Once the fixed capacity regulations are officially implemented, manufacturing units shall use materials specified in GB24511-2009 to produce pressure vessels. (II) Relevant technical measures. To ensure the smooth implementation of fixed capacity regulations, relevant technical measures for pressure vessel construction are proposed here (see Attachment 1). Each production unit may construct pressure vessels in accordance with the technical requirements specified in Appendix 1. II. Production (I) Regarding work-in-progress products. Pressure vessels that were manufactured in accordance with the \"Regulations on Safety Inspection of Pressure Vessels\" (hereinafter referred to as the old regulations) before December 1, 2010, and whose construction had not yet been completed, may continue to be finished ； Pressure vessels that have been manufactured in accordance with the old specifications and have not yet left the factory may still be shipped. (II) Regarding risk assessment. Article 3.6 of the Fixed Capacity Regulations requires design entities to prepare a risk assessment report when designing pressure vessels, and the basic content of such a report shall meet the requirements set out in Annex 2. When implementing the fixed capacity regulations, if any other issues arise in various regions and relevant units, please provide written feedback to our bureau in a timely manner. Attachment: 1. Relevant technical measures. 2. Basic requirements for risk assessment reports. November 30, 2010

The poster can just follow the requirements of Article 1, Paragraph (1).