Metal hoses may require approval or certification from regulatory bodies or standards organizations depending on the industry and application. Here are some common approvals and certifications associated with metal hoses:

1. ASME Certification: The American Society of Mechanical Engineers (ASME) provides certification for pressure vessels, including metal hoses used in high-pressure applications. ASME certification ensures that the hoses comply with stringent design, manufacturing, and testing standards.

2. PED Certification: The Pressure Equipment Directive (PED) is a European Union directive that sets standards for the design and manufacture of pressure equipment, including metal hoses. PED certification indicates compliance with European safety requirements for pressure vessels.

3. ISO Certification: The International Organization for Standardization (ISO) offers various certifications related to quality management systems. ISO 9001 certification, in particular, ensures that the manufacturer has established and maintains a quality management system that meets international standards.

4. ATEX Certification: In industries where explosive atmospheres may be present, such as petrochemical and mining, metal hoses may require ATEX certification. This certification ensures that the hoses are designed and manufactured to prevent ignition sources that could cause explosions.

5. FDA Compliance: In industries such as food and pharmaceuticals, metal hoses used for conveying food-grade or pharmaceutical-grade materials must comply with regulations set by the U.S. Food and Drug Administration (FDA) or equivalent regulatory bodies in other countries.

6. UL Listing: Underwriters Laboratories (UL) provides listings for various types of products to certify their safety and performance. UL listing for metal hoses ensures that they meet specific safety and quality standards, particularly for use in fire protection systems.

7. Marine Approvals: Metal hoses used in marine applications may require approval from classification societies such as Lloyd’s Register, DNV GL, or ABS. These approvals ensure that the hoses meet standards for marine safety and performance.

8. Industry-Specific Standards: Certain industries may have specific standards or certifications for metal hoses. For example, the American Petroleum Institute (API) sets standards for oil and gas industry equipment, and the International Maritime Organization (IMO) establishes regulations for marine equipment.

It’s essential to verify the specific regulatory requirements and standards applicable to your industry and application when selecting metal hoses. Ensuring that hoses have the necessary approvals and certifications helps guarantee their safety, reliability, and compliance with industry standards.