Transfer-line design uses special procedures. [Large diameter high temperature piping ssystems]

Journal Article · Mon Apr 28 00:00:00 EDT 1986 · Oil Gas J.; (United States)

OSTI ID:5649013

Malek, D; Tsairides, D

Fluid catalytic cracking (FCC) and fluid coking units utilize large-diameter, high-temperature piping systems to transfer fluidized catalyst, coke fines, and hot gases between process vessels. Because of the large diameters and high temperatures, these transfer lines require special design procedures and considerations. The designs are beyond the scope of industry piping standards. A complete stress analysis is required for each line with considerations given to thermal expansion, dead load (wind, seismic, etc.), flow-induced vibrations, allowable equipment loads, vessel nozzle connections, support and restraint devices, and special piping components such as valves, flanges, and expansion joints. Any state-of-the-art computer program can be used to calculate deflection and stresses for the various conditions. Before the analysis can begin, all the possible process conditions need to be known so that the analyst can consider the most economic combination of pipe material and refractory lining. The metal temperature of the pipe will have to be determined by calculating the heat loss through the refractory layers. Moment of inertia, density, and pipe-wall thickness have to be modified to include the increased stiffness and weight effects of the refractory lining in the computer analysis. The input to the flexibility program is straightforward for most lines, but for transfer lines, the input is the result of careful evaluation and lengthy calculations.

• Research Organization: Fluor Engineers, Inc., Houston, TX
• OSTI ID: 5649013
• Journal Information: Oil Gas J.; (United States), Vol. 84:17
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
CATALYSTS
TRANSPORT
COKE
HYDROCARBONS
CATALYTIC CRACKING
PETROLEUM PRODUCTS
PIPES
COMPUTER-AIDED DESIGN
COKING
COMPUTER CALCULATIONS
EXPANSION JOINTS
FLUE GAS
FLUIDIZED BEDS
MECHANICAL VIBRATIONS
NOZZLES
PROGRAMMING
STRESS ANALYSIS
TEMPERATURE EFFECTS
THERMAL EXPANSION
VALVES
CARBONIZATION
CHEMICAL REACTIONS
CONTROL EQUIPMENT
CRACKING
DECOMPOSITION
EQUIPMENT
EXPANSION
FLOW REGULATORS
GASEOUS WASTES
JOINTS
ORGANIC COMPOUNDS
PYROLYSIS
THERMOCHEMICAL PROCESSES
WASTES
020400* - Petroleum- Processing