Stainless steel metal expansion joint compensation amount for how much is normal

Stainless steel metal expansion joint and the clearance of the valve stem, generally taken 1 ~ 2mm. stainless steel metal expansion joint can not withstand the torque, the design should ensure that the stainless steel metal expansion joint only tensile and compressive. Stainless steel metal expansion joints in the opening and closing state of stainless steel metal expansion joints in compression and tension, respectively. Stainless steel metal expansion joint installation should be installed in the cold state, its installation error control in: both ends of the pipe and metal compensator buttress line should be maintained in the same line, coaxiality error of ± 5 mm, the working state can not be greater than ± 15 mm; up and down or left and right deviation displacement angle of ± 0.1 °; expansion joint correct installation length of L ± 5 mm. stainless steel metal expansion joint general vacuum dynamic seal leakage rate of 10-4Pa.L / S.
According to the processing requirements, some parts need to do polishing treatment, the surface can not have processing burrs, etc.; stainless steel metal expansion joint degreasing is completed after pickling passivation (cleaning agent does not contain phosphorus); pickling passivation after rinsing clean with pure water, can not have pharmaceutical residues; one by one stainless steel metal expansion joint with non-woven fabric for drying, can not be wired hair and other retained parts surface, or blow dry with clean nitrogen. Stainless steel metal expansion joints with non-woven fabric or filter paper dip analysis of pure alcohol on each part to wipe, until there is no dirty color. Stainless steel metal expansion joints gas-tight test is with pure nitrogen; stainless steel metal expansion joints gas-tight test qualified for encapsulation, sealed with clean stainless steel metal expansion joints, stainless steel metal expansion joints should be soaked in solvent before use, wipe clean; then sealed with vacuum bag7s; boxed; measures should be taken to ensure that the encapsulation is not broken during transportation. As a throttling with stainless steel metal expansion joints should consider the impact of flow rate on stainless steel metal expansion joints.