10 Questions for Sandra Perez / Krah América Latina, Buenos Aires
Krah New Mena plastic
With approximately 8 million people Cairo (Egypt) is the most populous city in the Arab world. Today the metropolitan area of Cairo is even home to around 25 million people, which means that the provision of clean drinking water and disposal of wastewater is one of the biggest challenges of this region. To address this problem the government has embarked on the project "Primary care families", some time ago. This project aimed to support people, "who had lost their homes in catastrophes or who lives in very bad conditions."
Main Differences in the Static Calculation Methodology for Flexible Pipes
The purpose of this article is to set up the main differences between two popular methods worldwide for performing static verifications of HDPE flexible pipes, i.e. between the method given by the ATV A127 standard ("Guidelines for Static Calculations on Drainage Conduits and Pipelines") and the method established by the American Water Works Association (AWWA) more specifically in its manual M55 ("PE Pipe Design and Installation").
Tanks for storage of liquids are required in all areas of public life. Constructions made of thermoplastic plastics are playing a decisive role on this. Beginning with the traditional bucket, which are belonging to our lives since the earliest initiations of plastics technology, up to the 100 m³ storage tank for chemicals and hazardous liquids – there is no way of avoiding constructions made of polyethylene and polypropylene today. Particularly if the cylinder barrel is made of helical extruded pipes, the flexible wall construction (profiled wall structure, multi layer, etc), which comes along with the manufacturing method, in connection with new generations of raw material, continuously opens up new possibilities of solution for the construction of tanks. Thereby new possibilities to connect stability, resistance, long-life cycle and chemical resistivity as well as cost-effectiveness are established. This makes it possible to incorporate them suggestively into construction.
A multitude of tanks is engineered in vertical form. The bottom construction is carried out as flat, beveled or conical bottom. The roof construction in turn can be engineered open – with or without reinforced edges, with cone-type roof or with flat roof.