GB5842-2023
Liquefied petroleum steel gas cylinders
液化石油气钢瓶
GB 5842-2023 is a current mandatory Chinese national standard for Liquefied petroleum steel gas cylinders. It appears in the Machinery compliance cluster with a product safety focus and has an implementation date of Dec 1, 2023.
Applicability depends on product scope, certification route, competent authority notices and transition rules. Requst for the translation or verify source before using this record in a compliance decision.
Compliance overview
Scope and applicability
This standard applies to liquefied petroleum gas (LPG) steel cylinders with a nominal working pressure of 2.1 MPa and a nominal volume not exceeding 150L, designed for use in normal ambient temperatures ranging from -40°C to 60°C. It covers reusable cylinders intended for containing LPG符合 GB 11174 specifications. This standard is mandatory for all manufacturers producing LPG steel cylinders for the Chinese market.
Technical requirements
The standard specifies comprehensive requirements for the materials, design, and manufacturing of LPG cylinders. It mandates that main body materials must possess excellent ductility and weldability, adhering to strict chemical composition and mechanical performance limits, including specific tensile strength and yield ratio parameters. Design calculations must follow prescribed formulas to determine the minimum wall thickness of the cylinder body and heads, ensuring structural integrity under a calculated pressure of 3.2 MPa. Manufacturing processes emphasize rigorous welding procedures and post-weld heat treatment. The standard dictates that circumferential and longitudinal welds must be fully penetrated and free from defects like cracks or incomplete fusion. Furthermore, it introduces stringent requirements for electronic traceability, requiring permanent electronic tags or QR codes to be laser-welded onto the cylinder guard ring. These tags must withstand high-temperature burning and salt spray environments to ensure lifelong readability. Additionally, the standard outlines specific marking and coating guidelines. Cylinders must feature stamped identification data with a minimum depth, and specific color codes must be applied (e.g., silver-grey for standard vapor cylinders, white for liquid phase cylinders). Manufacturers must publish comprehensive quality and traceability information on a public website, linking the cylinder's unique ID, valve ID, and electronic tags.
Testing methods
The standard mandates a series of rigorous evaluations, including radiographic testing (RT) for weld seam integrity, and hydrostatic and pneumatic testing to verify pressure resistance and airtightness. Batch testing protocols require mechanical performance testing (tensile and bending tests) and a hydraulic burst test to ensure a minimum safety factor of 3.0. Furthermore, it introduces specific durability tests for the electronic traceability tags, requiring them to survive direct flame exposure and prolonged salt spray testing. Pressure cycling tests are also required to validate the fatigue life of the cylinders.
FAQs
What products are regulated under GB 5842-2023?
GB 5842-2023 applies to liquefied petroleum gas (LPG) steel cylinders with a nominal working pressure of 2.1 MPa and a nominal volume not exceeding 150L, used in normal ambient temperatures (-40°C to 60°C). It is mandatory for all manufacturers producing LPG cylinders for the Chinese market.
Are there any significant updates from the previous GB/T 5842-2022 version?
The 2023 version transitions from a recommended (GB/T) to a mandatory standard. Key updates include revised model representation, a shift from gas-liquid dual-phase to single liquid-phase cylinders for certain models, enhanced requirements for electronic traceability tags, and stricter rules for cylinder placement (e.g., large cylinders are banned indoors).
What are the new traceability requirements introduced in this version?
The standard mandates a comprehensive digital traceability system. Each cylinder must have a permanent electronic ID tag or QR code welded to the guard ring, which must withstand high-temperature burning and salt spray tests. Manufacturers must publish this traceability data on a public website to ensure lifelong tracking of safety information.
The summary above provides a high-level overview of GB 5842-2023. To ensure complete compliance for your products entering the Chinese market, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 5842-2023 today to access all detailed parameters, formulas, tables, and testing procedures.
Applicability hints
- Type
- Product
- CCS
- J74
- ICS
- 23.020.30
- Competent department
- State Administration for Market Regulation
- Technical committee
- National Technical Committee on Gas Cylinders of Standardization Administration of China
Relationships
Replaces:GB/T 5842-2022