I. Basic Concepts of Gas Cylinder Valves

II. Main Standards for Cylinder Valves

Products mainly adhere to national standards and international standards (excluding auxiliary standards).

GB/T15382-2021 General Technical Requirements for Gas Cylinder Valves

GB/T7512-2017 Valves for Liquefied Petroleum Gas Cylinders

GB/T17926-2022 Valves for Compressed Natural Gas Cylinders in Vehicles

T/CATSI 02 006-2019 Liquefied Petroleum Gas Cylinder Valve

GB/T35208-2017 Self-closing Liquefied Petroleum Gas Cylinder Valve

GB/T8335 Special Threads for Gas Cylinders

GB/T8336 Thread Gauges for Gas Cylinders

GB/T34530.1-2017 Valves for Cryogenic Insulated Gas Cylinders, Part 1: Pressure Regulating Valves

GB/T34530.2-2017 Valves for cryogenic insulated gas cylinders, Part 2: Globe valves

ANSI/UL-2016 Cylinder Valves

CGA V-9-2005 Compressed Gas Cylinder Valves

DIN EN 1626-2009 Cryogenic vessels - Valves for cryogenic service

ISO 10297-2014 Gas cylinders - Cylinder valves - Specification and type testing

ISO 11363-1-2018 Thread for gas cylinders - 17E and 25E

ISO 14245-2006 Gas cylinders -Technical requirements and testing for self-closing valves for liquefied petroleum gas cylinders.

ISO 15995-2006 Gas cylinders -Technical requirements and testing of manual liquefied petroleum gas cylinder valves

ISO 22435-2007 Gas cylinders - Integrated valve regulators - Specification and testing requirements

ISO 15500-2001 Road vehicles - Compressed natural gas (CNG) fuel system components

Technical Specification Standards

TSG23-2021 Safety Technical Regulations for Gas Cylinders

Special Equipment Production and Filling Unit Licensing Rules TSG07-2019

IV. Special Reminders for Design and Structural Types of Gas Cylinder Valves

• For cylinder valves used with toxic or corrosive media, the use of pressure relief devices such as rupture discs and fusible alloy plugs is prohibited.

• The valve for non-refillable welding gas cylinders and liquefied petroleum gas cylinders should be of the non-detachable type.

• The inlet thread of the gas cylinder valve should match the corresponding standard thread of the gas cylinder.

V. Introduction to Domestic and International Certification.

1. Certification by UL, DOT, and ETL in the United States

A.     UL certification

UL is the abbreviation for Underwriter Laboratories Inc. UL Safety Testing Laboratory is the most authoritative and one of the largest private institutions in the United States engaged in safety testing and certification worldwide. It is an independent, non-profit professional organization dedicated to conducting tests for public safety. By employing scientific testing methods, it researches and determines the potential harm or degree of harm various materials, devices, products, equipment, buildings, etc., may pose to life and property. UL also establishes, develops, and publishes corresponding standards as well as provides information aimed at reducing and preventing losses to life and property. Additionally, it conducts factual investigations related to its business operations.

In summary, UL primarily focuses on product safety certification and operational safety verification services with the ultimate goal of ensuring that the market receives goods with a certain level of safety while contributing to personal health and property security.

B.ETL certification

ETL refers to ETL Testing Laboratories Inc. The ETL mark is recognized by Authorities Having Jurisdiction and can be considered 'approved'.

ETL is short for Electrical Testing Laboratories in the United States, and like UL and CSA, it can issue ETL certification marks based on UL standards or American national standards. It can also issue composite certification marks according to both UL or American national standards and CSA or Canadian Standards Association. The 'us' in the lower right corner indicates that it applies to the United States, while the 'c' in the lower left corner indicates that it applies to Canada. If both are present, then it applies to both countries. ETL certification is required for products exported to the United States and Canada. The ETL mark signifies that a product has passed testing accredited by NRTL in America and/or SCC in Canada. The recognition of the ETL mark carries equivalent weight as UL or CSA marks and complies with relevant safety standards.

C.     DOT certification

The Department of Transportation (DOT) in the United States explicitly stipulates that any application for compliance with Federal Motor Vehicle Safety Standards (FMVSS) submitted to the DOT must be based on manufacturers' understanding of the Office of Vehicle Safety Compliance (OVSC) laboratory testing procedures and adherence to DOT product safety specifications during production. In other words, the DOT provides detailed regulations for laboratory testing procedures, testing equipment, test tolerances, product standard requirements, specific testing steps, and reporting requirements for each specification related to motor vehicles and component products. All manufacturers exporting motor vehicles and component products to the United States must ensure that their products comply with the DOT's laboratory testing procedures.

(1) DOT certification does not provide a certificate, but rather a confirmation letter of registration issued by the U.S. Department of Transportation.

(2) After a company registers with the U.S. Department of Transportation, its DOT registration information can be found on their official website.

(3) The coordination between the company and the Ministry of Transportation is facilitated through a designated DOT certification agent in the United States.

2. TUV and GS certification in Germany

TüV certification is a safety mark specifically designed for electronic components, widely recognized in Germany and Europe. When applying for the TüV mark, companies can also apply for the CE certificate, which allows them to obtain certifications from other countries through conversion.

TüV Bauart is a certification mark for component safety. Obtaining the TüV Bauart certification signifies that the product has undergone independent testing and factory audits by TüV Süd Group in southern Germany, demonstrating its compliance with relevant European or international safety standards. The TüV Bauart mark is widely acknowledged by manufacturers and certification bodies not only in Europe but also globally.

TüV Bauart helps component manufacturers prove the safety of their products, making them more competitive in the market and attracting buyers to purchase these products. At the same time, component purchasers can ensure the safety of their purchased parts through the TüV Bauart mark, saving delivery time and additional testing costs.

3. CE Certification in EU

CE certification (CE Marking) is the passport for products to be sold within the European Union. In order to safeguard the safety of its member states' citizens and their property, the EU has established numerous safety directives that require certain products, such as machinery, low voltage electrical products, electromagnetic compatibility products, etc., to bear the CE mark. For some products, it is mandatory for them to undergo verification by recognized conformity assessment bodies in order to obtain certification and affix the CE mark before they can be sold in EU countries.

The "CE" mark is a safety certification symbol, regarded as the passport for manufacturers to open and enter the European market. Any product bearing the "CE" mark can be sold within the member states of the European Union without having to comply with each individual country's requirements, thus achieving free circulation of goods within EU member states.

In the EU market, the 'CE' mark is a mandatory certification symbol. Whether it is products manufactured by companies within the EU or those produced in other countries, they must be affixed with the 'CE' mark in order to freely circulate in the EU market and demonstrate compliance with the basic requirements of the EU Directive on Technical Coordination and Standardization.

This is a mandatory requirement imposed by EU law on products.

4. TPED Instruction Authentication

Directive on Transportable Pressure Equipment (Council Directive 1999/36/EC of 29 April on Transportable Pressure Equipment), commonly known as TPED, is a regulation that separates mobile pressure equipment from the regulations governing the transportation of dangerous goods in the history of pressure equipment development. This regulation applies to transportable pressure equipment (TPE) used for the transportation of dangerous goods by road and rail within the European Union. It covers both newly manufactured and in-service pressure equipment that undergoes repeated filling and periodic inspections. TPE refers to tank-type and bottle-type containers, including valves and accessories, used for transporting Class 2 hazardous substances (gases), as well as stabilized hydrogen cyanide (Class 6.1), anhydrous hydrogen fluoride (Class 8), and hydrocyanic acid (Class 8).

In order to sell mobile pressure equipment in the EU market, it is required to obtain the CE marking in accordance with the requirements of the EU Directive on Mobile Pressure Equipment (TPED). In 2010, the EU officially updated the directive on mobile pressure equipment and issued a new directive 2010/35/EU to replace Directive 1999/36/EC. The new directive (2010/35/EU) introduced a unified certification scheme to replace individual access systems of member states, setting requirements for design, manufacturing, and conformity assessment of mobile pressure equipment applicable to all EU member states.

5、BV Certification in France

BVQI is an international organization under the French Bureau Veritas(BureauVeritas，also called Société française de classification，short as BV，Founded in 1828), specializing in quality and environmental system certification as well as other industry standard certifications. Its headquarters are located in London.

BVQI is a prestigious and authoritative certification body with the second largest number of certified companies in the world. BVQI has played a significant role in the development and promotion of ISO9000 standards and a series of industry standards. With its network of over 580 offices in 154 countries, BVQI conducts system certification services through experts, making it widely recognized as the most international certification body globally. It is precisely because of this that BVQI's certifications have gained extensive international recognition.

6. TS Certification for Manufacturing License of Special Equipment in China

TS is a newly launched product certification by the Special Equipment Safety Supervision Bureau of the State Administration for Market Regulation. In order to produce and sell related products within China, it is mandatory to obtain the corresponding certification (TS).

TS certification is carried out by authorized certification bodies appointed by the national government. The General Administration of Quality Supervision, Inspection and Quarantine or authorized provincial licensing departments are responsible for administrative acceptance, approval, and issuance of certificates.