DIN 8906 standards is the PN 40 Flared Flange Solderless Compression Couplings For Use In Refrigerating Systems, The threaded joints are designed with male UNF thread with 90° flared end as per DIN 3866 standard. With different types of flare fittings as follows:
U1 type straight fittings dimensions
E1 type elbow fittings dimensions
US3 type braze on socket weld fittings dimensions
U2 type straight union fittings dimensions
T2 type Tee tube connectors dimensions
US3.1 type straight braze on weld nipple fittings dimensions
UR2 type straight reduce fittings dimensions
UR3 type reduce bushing female DIN 8912 end connector dimension
U1.1 type reduce straight connector from DIN 3866 to DIN 3852-1 dimension
U3.1 type reduce fittings from DIN3866 to W21.8 sonder
TR2.1 type Tee tube connector dimensions
TR2.2 type Tee connector dimensions
T2/NS4 type from DIN 3866 to DIN 8914 adapter fitting dimensions
