Alfa Laval Spiral Heat Exchanger SHE LTL 4S

Verify cover placement and orientation

Ensure gasket and cover compatibility

Select appropriate gasket material

Place gasket and cover in position

Apply and finger-tighten hookbolts

Tighten hookbolts diagonally using recommended torque

Enter the actual working pressure

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

Secure the exposed face of the SHE body with a rigid beam or other device if testing one side

Verify that the beam is held down by the hookbolts with a weld bead

Confirm the maximum test pressure is 1.5 times the MAWP

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

Examine channels for the following issues

Is an optical device needed for inspection?

Is there any massive corrosion or erosion evident?

Is there any mechanical damage suspected?

Describe any fouling observed, especially in vertical units

Contact Alfa Laval for advice if massive corrosion, erosion, or mechanical damage is detected

Retighten hookbolt assemblies in a diagonally opposite sequence

Is the cooler media admitted to the SHE first?

Is the fluid nearest ambient temperature admitted first if media are below ambient temperature?

Were pumps started against closed valves?

Is the pipework and SHE filled before opening the valves fully?

Select the cleaning method used

Ensure pipework is provided with valved branches for cleaning agents circulation

Are the cleaning agents compatible with the materials of construction?

Use proprietary cleaning agents according to manufacturers' instructions

Provide specific cleaning instructions if detailed fouling/scaling information and unit serial number are available

Flush the unit completely of all cleaning agents

Is the unit drained if not put back into operation immediately?