API Std 537 2003 pdf download.Flare Details for General Refinery and Petrochemical Service.
EN 12385-10, Steel wire ropes — Safety — Part 10: Spiral ropes for general structural applications API RP 2A WSD:2000 2 ) , Recommended Practice for Planning, Designing and Constructing Fixed Offshore Platforms — Working Stress Design ASME B16.5-2003 3) , Pipe Flanges and Flanged Fittings ASME STS-1, Steel Stacks ASTM A 123/A123M 4) , Standard Specification for Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel Products ASTM A 143/A143M, Standard Practice for Safeguarding Against Embrittlement of Hot-Dip Galvanized Structural Steel Products and Procedure for Detecting Embrittlement ASTM A 153/A153M, Standard Specification for Zinc Coating (Hot-Dip) on Iron and Steel Hardware ASTM A 384/A384M, Standard Practice for Safeguarding Against Warpage and Distortion During Hot-Dip Galvanizing of Steel Assemblies ASTM A 385, Standard Practice for Providing High-Quality Zinc Coatings (Hot-Dip) ASTM A 475-03, Standard Specification for Zinc-Coated Steel Wire Strand ASTM A 586-04, Standard Specification for Zinc-Coated Parallel and Helical Steel Wire Structural Strand ASTM B 633, Standard Specification for Electrodeposited Coatings of Zinc on Iron and Steel NACE MR0103:07 5 ) , Materials Resistant to Sulfide Stress Cracking in Corrosive Petroleum Refining Environments SSPC SP 6/NACE No. 3 6) , Joint Surface Preparation Standard: Commercial Blast Cleaning 3 Terms and definitions For the purposes of this document, the following terms and definitions apply.
3.2 assist gas fuel gas that is added to relief gas prior to the flare burner or at the point of combustion in order to raise the heating value NOTE In some designs, the assist gas can increase turbulence for improved combustion. 3.3 back blowing procedure by which the dry air seal drain line is blown back from the base of the drain into the buoyancy seal to ensure the line is clear 3.4 blowoff loss of a stable flame where the flame is lifted above the burner, which occurs when the fuel velocity exceeds the flame velocity 3.5 buoyancy seal diffusion seal dry vapour seal that minimizes the required purge gas needed to protect from air infiltration NOTE The buoyancy seal functions by trapping a volume of light gas in an internal inverted compartment that prevents air from displacing buoyant light gas in the flare. 3.6 burnback internal burning within the burner NOTE Burnback can result from air backing down the flare burner at purge or low flaring rates. 3.7 burn-pit flare open excavation, normally equipped with a horizontal flare burner that can handle liquid as well as gaseous hydrocarbons 3.8 burning velocity flame velocity speed at which a flame front travels into an unburned combustible mixture 3.9 coanda flare flare burner that is designed to employ the aerodynamic effect where moving fluids follow a curved or inclined surface over which they flow
3.12 condensable gas vapour that can condense at the temperature and pressure expected in a flare header during or after a flaring event 3.13 cryogenic service systems that may be called upon to handle waste gas below 40 °C ( 40 °F) 3.14 derrick support support system for the elevated flare riser, normally used for very tall flares or when plot space is limited NOTE Various derrick-supported arrangements are available: a fixed system has its riser permanently supported to the derrick; a demountable derrick has multiple riser sections that are designed such that they can be lowered and removed to permit lowering of the flare burner to grade; a demountable derrick with one fixed riser provides for a single-piece design that can be lowered to grade as a single component. 3.15 design flare capacity maximum design flow to the flare NOTE The design flare capacity is normally expressed in kilograms per hour (pounds per hour) of a specific composition, temperature, and pressure. 3.16 destruction efficiency mass percent of the combustible vapour that is at least partially oxidized NOTE In the case of a hydrocarbon, destruction efficiency is the mass percentage of carbon in the fluid vapour that oxidizes to CO or CO 2 . 3.17 detached stable flame flame that is not in contact with the flare burner itself but burns with a stable flame-front in the vicinity of the flare burner 3.18 direct ignition ignition of a flare flame by a high-energy source rather than by a pilot flame 3.19 dispersion scattering of the products of combustion over a wide area to reduce ground-level concentrations of the combustion products 3.20 enclosed flare flare enclosure with one or more burners arranged in such a manner that the flame is not directly visible