Alfa Laval Spiral Heat Exchanger SHE Medium IMS/YMS

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

Verify that the beam is held down by the hookbolts with a weld bead as shown in the diagram

Confirm the maximum test pressure is 1.5 times the maximum allowable working pressure (MAWP)

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

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 the following before opening a Type I or III unit

Disassemble hookbolts and remove covers

Dismantle the flanged joint for the cooling water outlet on Type IIIV upper cover

Check for damage when removing residual gasket material

Securely hold the unit in place to prevent swinging

Securely fasten hinged covers at piping connections and mounting brackets before opening

Ensure proper shutdown sequence

Ensure units with fluids below ambient temperature are not at ambient temperature against closed valves

Arrange working fluid pipework for continuous venting

Determine action for short shut-down period

Determine action if freezing risk exists or unit is to be opened

Drain, flush, and redrain SHE if returning to manufacturer

Ensure SHE is shut down and isolated from process and service streams before draining

Verify cover placement and orientation

Ensure gasket material consistency

Place gasket and cover in position

Apply and finger-tighten hookbolts ensuring correct cover location

Enter the recommended torque for hookbolts

Are hookbolts tightened diagonally to avoid dislocation?

Enter the actual working pressure