Kromschröder - REFALIT flange seal DN 100 - HTB PN 10/16
DIN 2690, without bores, 115 x 162 x 2.0 mm, code.
according to DIN 30690-1: date of manufacture, material, 2.2 certificate
and torque calculation for screws 5.6
for flange connections according to DIN 30690-1 and
DVGW Information Gas No. 19