Articles covered in this issue:
Surge Detection and Surge Control Systems for Centrifugal Compressors – Part 1
Neetin Ghaisas, Fluor, Todd Reitsma, Compressor Control Corporation
Surge detection and surge control of centrifugal compressors is complex and requires specialized knowledge and experience. This article focuses on fundamentals such as dynamic centrifugal compressor map, operating envelope, surge cycle and surge detection.
Centrifugal Pumps – Part 2: Offer Evaluation Guidelines
Kiran Gosavi, Amol Patil, Aker Solutions
The article provides guidelines on specific and advanced topics for selection of centrifugal pumps. It also gives an insight on rotor dynamic studies required for special duty pumps.
A closer look at Impact test requirements of Piping Materials
Raghuraj Puri, Nikhil Jagtap, Anshul Singla, Roy Grichuk, Fluor Daniel Pvt. Ltd.
Brittle failure of piping materials occurs without prior warning and could lead to both human and financial losses. In order to avoid such mishaps the designer can select impact tested steels as per testing requirements. These requirements and also the essential factors that can improve the low temperature properties of piping materials are outlined.
Say no to Pressure Letdown Valves, but yes to Letdown Turbo Generators and Turbo Expanders
S. Raghava Chari, Industry Consultant
Reducing steam pressure through a steam turbine, liquid pressures through a hydraulic turbine and gas pressures through turbo expanders offer immense energy savings potential, while pressure letdown valves waste energy.
Hazard Analysis and Safety of Pipes against Internal Gaseous Explosions in Industries – Part 2
Dr. (Ms.) Manju Mittal, CSIR – Central Building Research Institute
This article is a part of study undertaken at CSIR-CBRI, Roorkee, India, for safety in pipes in chemical and petrochemical industries and presents analysis of internal explosion hazards associated with pipes carrying flammable gases.
