. Welded nipple pipe screw fittings with connectors and union nuts are standardised in DIN 2353. The welded nipples with O-rings are in accordance with DIN 3865.
Fluidlexikon
. Welded nipple pipe screw fittings with connectors and union nuts are standardised in DIN 2353. The welded nipples with O-rings are in accordance with DIN 3865.
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