New at Piping Design Central: 24 June 2003

http://www.pipingdesign.com/insulation.html Insulation

Piping and Equipment Insulation (PDF)
Norsok Standards

http://www.pipingdesign.com/safetydevices.html Safety-Related

Design of Pressure Relief Systems
Trang Nguyen (University of Waterloo ChE)

<<Determining the relief required is the most difficult part in designing a
relief valve. To ensure the safety of the system, conservative assumptions and detailed analysis are applied. Refer to design considerations for more detail. It is assumed that two unrelated emergencies cost by two non-related equipment failures will not occur simultaneously. The design engineer needs to be familiarized with the overall process design. The design of the relieving device must take into consideration of many upset conditions for the individual equipment items, in precaution that these upsets may occur.>>

http://www.pipingdesign.com/safetyvalves.html Safety Valves and Devices

Types of Relief Valves
Trang Nguyen (University of Waterloo ChE)

<<A conventional relief valve is a differential pressure valve. The inlet
pressure to the valve is directly opposed by a spring. The tension on the spring is set to keep the valve closed at normal operating pressures, but allows it to open when relieving pressure is reached. In the petroleum industry, most of these valves have disks that have a greater area than the nozzle seat area. The design of a typical conventional relief valve is shown in Figure 1.>> Received on Tue Jun 24 12:08:00 2003