KEH Energy Engineering

PIPING ANALYSIS

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CAEPIPE

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KEH uses the CAEPIPE (prounounced "K-pipe") program produced by SST Systems of San Jose, California. This program allows rapid assessment of the flexibility of piping systems and produces a large volume of reports that provide all the essential information about the movement and forces in the piping system.

Given a CAD drawing with indicated elevations construction of a model of the piping system can be produced quickly. Using the model the CAEPIPE program then solves the complex matrices of multiple anchor piping systems to produce calculated results within seconds. If the analysis indicates thermally imposed stresses in excess of that permitted by Code or excessive anchor or equipment loads Ken then applies his more than forty year's of experience in designing piping systems to suggest alternative constructs that comply with Code and reduce anchor and equipment loads to acceptable levels.

WHY ANALYZE PIPING FLEXIBILITY?

Economics is the best reason. Ken's analysis and design alternatives have saved contractors substantial sums by eliminating unnecessary or inappropriately placed anchors. Analysis ensures forces on pump and turbine connections are within the limits of the applicable Codes to prevent damage to that equipment. Analysis and redesign has served to eliminate expensive pre-engineered joints for lower installed costs and savings in maintenance for the owner. The cost of the analysis is a small fraction of the savings in construction alone.

IT'S THE LAW!

All hazardous material piping systems are supposed to be subjected to analysis according to OSHA regulations (29 CFR 1910.119) Process Safety Management of Hazardous Chemicals

IT HELPS PREVENT DAMAGE TO EQUIPMENT

Analysis produces precise values of forces and moments at equipment connections so forces at pump, turbine, and pressure vessel nozzles are known. This information proves to be even more important than the stress in the piping because the loads allowed by API-610 (for pumps) and Sm-23 (for turbines) are considerably lower than loads imposed by a system with moderate pipe stresses.

IT REDUCES POTENTIAL FOR CATASTROPHIC FAILURE

If the piping is not analyzed the installed system could have a localized high point of stress that will weaken the piping until there is a violent rupture. Steam and high temperature hot water piping failures are extremely hazardous and must be avoided.

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