DVGW

DVGW Registration Notice and Certificate
The DVGW (German Association of Gas and Water Trade) also certifies sealing materials for the German gas suppliers.

ZP 5123

H₂ tested acc. to certification programme 5123 of DVGW CERT GmbH
Supplementary tests for gasket materials against a hydrogen content of up to 100 % by volume

Grade Y

according to British Standard BS 7531

Germanischer Lloyd (DNV GL)

Amongst other things, Germanische Lloyd (DNV GL) certifies gasket materials for use in shipbuilding