Peng Engineering develops and supports the SIMFLEX series of Pipe Stress Analysis computer software packages. To suit each individual company's needs, several versions of SIMFLEX, each with varying capabilities, have been created. This allows a company to adopt the program to the extent that is needed without paying for unwanted features. Simflex offers accuracy, productivity and reliability in a fast and easy to use package.roblem, performing the stress analysis to confirm the problem, and optimizing the design to solve t...