Welding
of Assemblies
Welding should be performed by
an experienced welder using the GTAW (Gas Tungsten Arc
Welding) process. Bored flanges are designed for assembly
by internal fusion welding without the use of filler material.
Tacking is advisable. Use of a weld rotator helps maintain
uniform heat input over the entire length of the weld,
thus reducing the possibility of warping the flange face.
Use of an inert atmosphere on the opposite side of the
weld prevents oxidation from occurring in the weld zone.
Oxides may be removed by wire brushing while the joint
is still warm. Only use brushes made from stainless steel.
Carbon brushes will leave iron particles inbedded in the
surface, providing sites for corrosion to begin.
Protection
of Seal Surfaces
Flanges are packaged to prevent damage to the
seal surface during shipment. Excercise care when storing
or using these flanges, to prevent damage to the seal
surface.
Vacuum & Non Ultra High Purity Fittings 
ISO-KF Vacuum Components (
