Alfa Laval Spiral Heat Exchanger SHE Medium ISS/YSS

Verify cover placement and orientation

Ensure gasket and cover compatibility

Apply hookbolts and finger-tighten

Tighten hookbolts diagonally using recommended torques

Enter the actual working pressure (psig)

Calculate and enter the torque based on actual working pressure

Ensure all parts are in place before testing

Secure the exposed face of the SHE body with a rigid beam or device

Is the beam held down by the hookbolts with a weld bead?

Enter the maximum allowable working pressure (MAWP)

Enter the maximum test pressure (1.5 times MAWP)

Conduct hydrostatic test on one side of the unit

Is hydrostatic testing practical?

Consult Alfa Laval if air testing is considered

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 shut-down sequence

Is the working fluid pipework system arranged for continuous venting?

Determine the action based on shut-down period and risk assessment

Is the unit to be returned to the manufacturer for inspection, cleaning, or repair?

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

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

Drain the SHE based on type and orientation

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 below ambient?

Were pumps started against closed valves?

Is the pipework and SHE filled before opening valves fully?