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What is a SELO license for pressure vessels
and other pressurized products?

Various terms are used to describe the license, which entitles a company to sell their products in one of the fastest growing markets in the world, the P.R. China. The SELO license is an approval procedure from the Special Equipment Licensing Office (SELO) overseen by the State Administration for Market Regulation (SAMR). The license is also known as “China Stamp”, the “China Manufacture License” (CML), or the Pressure Vessel License and refers to a licensing procedure to the Chinese TSG Regulations (Tezhong shebei anquan jishu guifan, from Chinese and means “Technical security regulation for special equipment”) and the GB standard (Guobiao, from Chinese and means „National Standard”). Products subject to this certification are:

  • Pressure Vessels
  • Boilers
  • Security equipment (such as saftey valves and bursting disks), and
  • Valves of Gas cylinders

The SELO License has been introduced due to increasing international competition. Comparisons with other countries brought to light shortcomings with Chinese regulations. Consequently, the Chinese authorities focused their attention on quality assurance and product security.


Frequently asked questions

Constantly changing laws and increasing regulations complicate the process for first time applicants, as well as for companies familiar with the SELO license. This is because the CML legislation is quite young and frequent adjustments are made.

Although CML regulations share similarities with

  • ASME and
  • DIN EN ISO 9001.

these regulations have been deemed insufficient, and subsequently supplemented by Chinese specifications. Licensing takes place according to current TSG regulations and GB standards. These include the TSG Z0004-2007 – Basic Requirements for Special Equipment Quality Assurance System on Manufacture, Installation, Alteration and Repair and the TSG 07-2019: Regulation for Production and Filling Licensing of Special Equipment.

These regulations should be implemented in the applicant’s own company and recorded into a handbook. Other Quality Management Handbooks (QMH) are not accepted by the Chinese authorities unless they perfectly match the Chinese requirements. A quality Handbook according to DIN EN ISO 9001 or TSG Z00004-2007 is no longer sufficient. The QMH must comply with the Chinese regulations according to TSG 07-2019 and must be available in English.  As a result of factory inspections and the growing experience of Chinese inspectors, Chinese authorities - such as AQSIQ, SELO and the CSEI institute - further develop their existing regulations and standards. Standardized procedures simplify the inspectors’ job. However, abiding by such procedures and facilitating inspections is time consuming and often involves misunderstandings due to language barriers and cultural differences. Please find additional information on the SELO-License using the following link - free Know-How – or contact us via phone/email.

  • Are you a manufacturer and planning a one-time export of a pressure vessel or boiler to a Chinese customer?
  • Are you planning to export your products to a Chinese customer on a regular basis?
  • Are you already exporting your product to China but changing regulations require certification?
  • Are you assembling devices from different components (manufactured by different companies) and need a robust solution to be able to export your product to China?
  • Are you building a product in cooperation with a Chinese company and require a certification for the imported components?
  • Do you require any further assistance concerning the CML?

We gladly provide answers to the above questions, as well as any other questions you may have.

Cisema offers to help your company at any stage of their “China Certification” application process. However, it is best for companies to approach us at the beginning of the process. Mistakes at this stage delay and complicate the licensing process significantly, and may also lead to considerable additional costs for the applicant.

Our comprehensive services comprise:

  • Determining whether your products require licensing
  • Processing the application for the CML license
  • Review of required documents, e.g. Quality Management Handbook
  • Assistance during required type tests
  • Professional support prior to and during the inspection of your facility, also known as “SELO Audit”.
  • Attending to the Chinese inspectors throughout and following the inspection process
  • Communication and coordination between your company and Chinese authorities. Our services are multilingual, with employees fluent in Chinese, English and German, amongst other languages.
  • Tracking your application progress until your SELO license is issued and the “China Stamp” is attached to your products
  • Extensive assistance in case of changes or re-licensing (renewal).

Correct application: Avoiding mistakes that are not easily detected

  • Our 15 years of experience with a wide client base has enabled us to provide a sound service.

Contact person close to you, providing you with timely assistance

  • Due to our location in Germany and China, we are very flexible and are available on short notice

Avoiding misunderstandings caused by cultural or language barriers

  • Cisema offers interpreter services and has wide knowledge of Chinese culture and mentality.

Existing relations with Chinese authorities

  • Relationships withChinese authorities are essential for businesses in China. Our offices in China maintain these within the framework of our code of conduct (we follow FCPA)

Specialized Know-How

  • Our long-term experience in the field of certification enables us to provide you with expertise.

Saving of expenses

  • High costs occur due to mistakes and misunderstandings. We help you avoid these through an efficient approach.

Keeping a close watch on the latest regulations

  • Our local offices in China ensure that we are up-to-date on changes of boiler and pressure vessel regulations. It is of utmost importance that applicants are aware of changes as Chinese authorities emphasize strict and often immediate compliance with regulations.

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