E-ISSN 0976-7916
  Journal of Engineering Research and Studies
                                           -An Open Access Peer Reviewed e-Journal


Authors: Dr.(Ms.) Manju Mittal*

JERS/ Volume IV/ Issue III/ July-Sept. .2013/01-11

Dust explosions represent a serious hazard in the food and feed industry. Grain and flour dusts can form explosive clouds and, because, explosions from such clouds have caused some of the worst industrial accidents, it is necessary to draw public attention to this problem. This paper reviews some devastating explosions in flour mills and other facilities in grain handling installations including an incident that took place in a bakery in Turin in 1785 which motivated research in this area; analyzes conditions and causes of dust explosion in flour mills and associated facilities; and discusses explosion preventive and protective measures to avoid many injuries and deaths and material losses. The explosion parameters for wheat flour and rice flour dusts required for identifying the explosion hazards in wheat and rice flour mills and associated units and designing suitable explosion preventive and protective measures determined using CSIR-CBRI 20-L Sphere, Godbert-Greenwald Furnace and Hartmann Apparatus are presented for specific samples alongwith literature data.

Authors: *Akula Ramakrishna, Nihal A Siddiqui, P Sojan Lal

JERS/ Volume IV/ Issue III/ July-Sept. .2013/12-15

Liquefied Petroleum Gas (LPG) cylinders in India are designed, manufactured, tested and certified at manufacturing location to ensure cylinder are manufactured as per Indian Standard, IS 3196. Several tests are conducted on LPG Cylinders, in which acceptance test is one of the important tests to reveal cylinder parent metal mechanical properties. Two tensile specimens are prepared from finished cylinder batch for this test and tested on a universal testing machine to determine, yield strength, percentage elongation and ultimate tensile strength of parent metal. Values of these test results are compared against standard values prescribed in Indian standards to decide acceptance of cylinder batch for market release. There are various ways of preparing tensile sample for acceptance test, depending on the accuracy of test results and sample production requirements. An attempt has been made in this paper to review existing sample preparation practices for 33.3 litre water capacity domestic LPG Cylinders and suggested a feasible option for optimal sample preparation method in which both sample preparation timelines and dimensional accuracy can be achieved for accurate test results.