Alfa Laval Spiral Heat Exchanger SHE Cond 2S

Allow medium with nearest ambient temperature to circulate after other medium is turned off

Reduce all flow rates slowly to avoid hydraulic and thermal shock

Ensure units with fluids below ambient temperature do not attain ambient temperature while containing fluid against closed valves

Arrange working fluid pipework system for continuous venting

Determine action if shut-down period is short and SHE is not to be opened

Flush with water and drain if risk for freezing exists or if unit is to be opened

Drain, flush with water or cleaning agent, and redrain if returning unit to manufacturer

Is an optical device needed for inspection?

Is massive corrosion or erosion evident?

Is mechanical damage suspected?

Contact Alfa Laval for advice if necessary

Ensure unit safety before opening

Dismantle flanged joint for cooling water outlet on Type IIIV

Check for damage when removing gaskets

Secure unit to prevent swinging if mounted on trunnions

Fasten hinged covers at piping connections and mounting brackets

Check cover and SHE body alignment

Cut gaskets from sheet material

Ensure gasket and water connection are same thickness for Type IIIV

Select appropriate gasket material

Place gasket and cover correctly

Apply and finger-tighten hookbolts

Tighten hookbolts diagonally using recommended torque

Ensure complete reassembly of the SHE before testing

Decide if testing one side of the unit before assembling the cover(s) on the other side is desired

If testing one side, ensure the exposed face of the SHE body is held down by a rigid beam or other device

Secure the beam using hookbolts and place a weld bead as shown in the diagram

Verify that the hydrostatic pressure does not exceed one and one half (1 1/2) times the maximum allowable working pressure (MAWP)

Consult Alfa Laval if hydrostatic testing is not practical and air testing is considered