POM gate valves installed in underground PE pipelines
This approval requirement specifies the requirements for the polyoxymethylene (POM) gate valves installed in underground PE pipelines applied for the transport of gaseous fuels in accordance with the 2nd and 3rd family as per NEN-EN 437.
This approval requirement is applicable to POM gate valves, with mechanical couplings and an outer diameter of ≤ 63 mm. The maximum permissible operating pressure is 4 bar.
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Manufacturers, grid companies, representatives, retailers, constructors and in installers
Process steps
An approved quotation is the beginning of a tested and an approved product. You'll find the most important steps on the right. For more information you can contact our certification engineers.
Initial product assessment
The assessment to determine if all requirements in the approval requirement are met.
The result
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.