TRI*HEADER Emergency Relief System Analysis and Design

TRI*HEADER designs and rates converging tree piping networks, including flare headers and gathering systems. It utilizes a built-in component data base to perform rigorous VLE, heat transfer, and two-phase compressible flow calculations to accurately predict fluid behavior in the network. It takes into account such phenomena as liquid holdup, choked flow, and Joule-Thompson thermal effects. In design mode, TRI*HEADER optimizes the network, solving for the minimum pipe sizes necessary to meet the flow requirements. In rating mode, TRI*HEADER calculates the temperature and pressure distribution throughout the network and produces a detailed summary of the flow characteristics along the pipe network. In either mode, it can design pressure relief valves per API 520 specifications, separate liquid condensate from a pipe line headed toward the flare stack, and do rigorous parallel piping segment calculations for those instances where the addition of a pipe in parallel to an existing network segment is a better solution to solving a flow bottleneck than totally replacing the pipe segment.

TRI*HEADER APPLICATIONS

• Design new Emergency Relief Systems including pressure relief valves and knock-out drums
• Design additions to existing flare header systems including paralleling of runs with current piping segments
• Evaluate alternative designs by using simple spread sheet data entries.
• Calculation of heat transfer and fluid flow characteristics for fluids flowing in converging tree networks.

TRI*HEADER PROVIDES

• Precise network flow analysis for pure components or mixtures in either liquid, vapor, or two-phase states
• Optimized design mode which selects proper network pipe sizes based on user specified limitations for maximum allowed velocity, percent of critical flow, and/or pressure drop
• Automatic adjustment for near sonic flow velocities
• Multiple option analysis mode to handle fluid choking and locate system bottlenecks
• Mix and match analysis and design modes on a single network, allowing design and What-If scenarios with additions to existing networks
• Intuitive "from node" - "to node" network segment specification strategy, simplifying both input and output as well as providing for efficient calculation algorithms
• Large insulation and piping material databases provided to simplify the data entry process
• DIN and ANSI standard pipe sizes as well as user specified custom pipe sizes supported in both data entry and calculations
• Automatic computation of both thermodynamic and transport properties of fluids using data from either an extensive built-in data base or from customer specifications
• Large selection of user specified equations of state for modeling thermodynamic properties of components and mixtures.
• Input and output unit choices selectable from either standard or client configurable unit sets
• Rigorous heat transfer calculations from the piping network to a choice of environments including buried beneath the surface, submerged in water, or suspended in air
• Optional segregation of water in hydrocarbon mixtures, using built-in steam tables rather than hydrocarbon based equations of state