What is the purpose of a rupture disk?

A rupture disc is a non-closing pressure relief device used to protect industrial applications from overpressure- or vacuum-related events.

Why rupture disc is used in condenser?

However if there is failure of cooling water circuit in the condenser then Pressure starts increasing. Effect of increase in back pressure causes a decrease in efficiency of turbine and an increase in the pressure could damage the condenser hence rupture disc protects the equipments and stops the Turbine.

What is rupture disc in turbine?

Turbine rupture disks (Figure 1) or diaphragms protect low pressure turbine casings from deforming or rupturing due to an accidental increase of the internal steam pressure.

How often should rupture discs be replaced?

Maintenance Frequency. While rupture disc manufacturers would like to recommend replacement of every rupture disc every year, that is not a realistic expectation. As shut- downs for maintenance activities are stretched further and further apart, it is not unusual to expect 3 to 5 years of service from the rupture disc.

What is the difference between safety valve and rupture disc?

A rupture disc is an emergency relief device consisting of a thin metal diaphragm carefully designed to rupture at a predetermined pressure. The obvious difference between a relief or safety valve and a rupture disc is that the valve reseats and the disc does not.

What actions will you take when the bursting disc will burst?

ONCE COMPRESSOR IS STARTED, OPEN THE WATER VALVES AND LET THE WATER FLOW OUT OF THE BURSTING DISC AREA WHICH IS ALREADY OPEN DUE TO BURSTING OF BURSTING DISC. KEEP AN EYE ON THE EXPANSION TANK OF THE COMPRESSOR AND FILL IT UP AS SOON AS THE LEVEL START FALLING.

Where do you place a ruptured disc?

When used in series with a pressure Relief valve, the rupture disk is usually installed upstream of the valve. The disk will protect the valve from process media that can corrode or plug it. The disk can also act as a seal, preventing any leakage through the valve unless the disk is ruptured.

What is burst pressure of rupture disc?

The burst pressure of the disc shall be no closer than 20\% above the normal operating pressure. 2. A similar rupture disc with metallic pressure seal and vacuum or back pressure support shall have a bursting pressure not closer than 10\% above the normal operating pressure.

What are the types of rupture disk?

Domed rupture discs can be of two shapes.

• Dome towards the process (reverse-acting rupture disc)
• Dome away from the process (forward-acting rupture discs)

What is the function of pressure relief valve?

The purpose of a pressure relief valve is to control or limit surges of pressure within pipelines, acting as protection for the system, and defending against instrument or equipment failure.

What is SRV valve?

Safety relief valve (SRV): an automatic system that relieves by static pressure on both gas and liquid.

What are the two main components of a rupture disk?

It consists of two main components: the rupture disk holder which provides the pressure boundary and clamps the disk into position, and the rupture disk (the actuating element). Rupture disks are replaced after actuation or periodically as part of preventative maintenance or inspection.

What is the temperature of a ruptured disk?

Disk temperature may be based more upon its environment than the temperature of the process fluid. A recent incident involving a rupture disk pointed out some of these problems. A vessel was rated at 150 pounds per square inch (psi) at 400° F, and a rupture disk was specified with a set pressure of 150 psi at 400° F.

What is a condensing turbine and how does it work?

The condensing turbine is able to use the total energy of the inlet steam flow to a maximum extent. Therefore, this type of turbine is used for power utilities that want to supply electricity to consumers as much as possible.

Who is responsible for selecting rupture disk devices for press pressure vessels?

Pressure vessel users are responsible for proper selection of an appropriate rupture disk device. Inspectors performing an initial installation or inservice inspection must then evaluate that selection.