Gas installation

Corrugated metal hoses

This approval requirement applies to corrugated metal hoses suitable for the connection of domestic movable or fixed appliances inside buildings according to NPR 3378-11. The corrugated safety metal hose assemblies shall be used for 1st, 2nd and 3rd family gasses according to EN 437, with a maximum operating pressure up to and including 0,5 bar.

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For who?

Manufacturers, grid companies, representatives, retailers, constructors and in installers.

Process steps

An approved quotation is the beginning of a tested and an approved product. The most important steps are:

- Initial product assessment: the assessment to determine if all requirements in the approval requirement are met.

- The result is a certificate upon which is mentioned to which requirements the product complies.

- Product verification: the assessment performed after granting certification to determine that the certified products still comply with the requirements in the approval requirement. 

- Control on quality system requirements: control on following the IQC scheme (as described in the approval requirement) and the procedures.

For more information you can contact our certification engineers.

Additional information