Share. Embed. II List of OISD Standards III Minutes of the Thirteenth sitting of the Committee (2010-11) held on 26.07.2011 IV Minutes of the Second sitting of the Committee (2011-12) held on 31.10.2011 V Minutes of the Seventh sitting of the Committee held on 29.3.2012 VI Minutes of the Ninth sitting of the Committee held on 16.4.2012 MANAGER/ SR.V. static charge meter. potassium when the burning metals are reactive to water and water containing agents. access and exits of the building should not be obstructed by other vehicles. 4. earth leakage circuit breakers. II & III Design flow rate = 888 m3/hr 3.0 TOTAL DESIGN FIRE WATER RATE Fire water rates for 5 cases are given below: i) ii) iii) iv) Floating roof tank protection Cone roof tank protection LPG sphere protection LPG rail wagon loading gantry protection Process unit protection = = = = 1289 m3/hr 1635 m3/hr 1923 m3/hr 864 m3/hr v) = 888 m3/hr Total design fire water rate is the sum of water rates for 2 major fires: Design fire water rate m3/hr = 1923 m3/hr + 1635 = Say = 3558 m3/hr 3700 m3/hr 35 .Considering the maximum water under alternative I. CONE ROOF TANK PROTECTION: i) Data : Total Storage capacity in one dyke area Number of tanks Diameter of each tank Height of each tank ii) = = = = 50. There are three types of systems: i) Fixed ii) Semifixed iii) Mobile 6. for installations having tankages larger than 60 mtrs diameter.0) or foam sufficient to fight two major fires whichever is more. 38 . 25 and 40 kg/second at operating pressure of 14 kg/cm2 Monitor throw . The hose length shall be calculated as follows: i) For installation with hydrants upto 100 Nos: . ii) Isolation Valves : Cast Iron in offsite area : Cast Steel in unit areas and fire water pump stations. Class B Fires : Fires involving flammable liquids. The horizontal range and coverage of hydrants with hose connections shall not be considered more than 45 mtrs. A good layout provides adequate fire fighting access. handling & bottling plants. 100% standby containers shall be considered for each protected hazard. This could be achieved through better design, change of process or guarding by mechanical means. Website: www.oisd.gov.in 8. OISD-STD-106 on Process Design and Operating Philosophies on Relief and Disposal System. the detector provides visible and audible alarm signals. electrical fire. 11. to be stored 23 . SMALL FIRE: No siren 2. Receipt and despatch of LPG by rail. Floating roof tanks storing Class 'A' and Class 'B' petroleum products. paper. Item rate Water 2 application Atmospheric storage 3 Ipm/m2 of tank shell tanks area for tank on fire 3 Ipm/m2 of tank shell area for exposure protection for tanks located within (R+30)mts from centre of tank on fire within the same dyke area.4 lpm/sq.1 5.4 lpm/sq. class 'C' product shall be considered as Class 'B' product and Class 'B' product shall be considered as Class 'A' product. 4 Mobile/Fixed High Water/Foam Monitors Volume Provision for fighting storage tank fire from road side through mobile/fixed high volume long range monitors should be considered at critical storage locations. MIN. Please fill this form, we will try to respond as soon as possible. Download oisd std 117 PDF … i) Pipes: Carbon Steel as per IS: 3589/ IS:1239 or its equivalent. 6.>35 upto 40 >40 upto 45 >45 upto 50 6 8 10 Tanks containing Class 'A' & 'B' Petroleum or liquids heated above their flash points --.10 WATER FOR FOAM MAKING Water quantity required for making foam solution depends upon the type of foam used.Class 'C' Petroleum . leak pads.16000 Itrs capacity with suitable pump for foam transfer. Explosimeters.Description i) Dry chemical powder fire extinguishers -10 kg capacity Norms/criteria to determine the quantity needed To be located in process units. The present document on 'Fire Protection Facilities for Petroleum Refineries & Oil/Gas processing plants' is First Revision of the document prepared by the Committee on 'Fire Protection' which was originally published in 1991. Storage containers shall be located as near as possible to hazard area but shall not be exposed to fire.
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