CE, TUV, and ASTM are three different certification standards used in various industries.

CE stands for Conformité Européene, which is a mandatory certification in the European Union for products sold in the EU market. It ensures that the product meets the essential health, safety, and environmental protection requirements set by the EU.

TUV, on the other hand, is a German certification organization that provides testing and certification services for various industries. TUV certification ensures that the product complies with the relevant safety, health, and environmental protection standards.

ASTM, which stands for American Society for Testing and Materials, is a voluntary organization that develops and publishes technical standards for materials, products, systems, and services. ASTM standards are used by manufacturers, purchasers, and regulators to ensure that the products meet certain quality and safety requirements.

CE and TUV certifications are mandatory requirements in the EU and Germany, respectively, while ASTM standards are voluntary in the United States. They all aim to ensure that products meet specific safety and quality standards.

When it comes to choosing between these organizations, it largely depends on the specific industry and product in question. For example, if you are exporting a product to Europe, the CE mark may be required to comply with EU regulations. If you are manufacturing a product in Germany, you may need to obtain TUV certification. If you are in the construction industry, you may look to ASTM standards for guidance on materials and building codes.