Polyethylene (PE) pipes — Pressure drop in mechanical pipe-jointing systems — Method of test and req...
Specification of a laboratory test assembly with the pipe-jointing system to be tested. A water flow of 2 m/s through the pipe assembly is adjusted and the resulting pressure drop is determined.
The requirements specify material including its hydrolytic resistance and thermal coefficient of expansion. The range of sizes and tolerance and external diameters and well thickness are tabled and described. In a second table the limits on bow for different external diameters are specified.
Laboratory glassware — Principles of design and construction of volumetric glassware
Reference temperatur, volumetric accuracy, methods of verification and construction are considered. The annexes deal with the limits of volumetric error in relation to capacity and to the diameter at the meniscus. The interrelation between standard deviation, limit of volumetric error, and line thickness is described.
The basis of adjustment, volumetric accuracy and capacity are considered and the series of capacities is given specified with and without bulbs. The limits of volumetric error, the construction and dimensions, delivery time and inscription are defined. The specified details comply with ISO 384.
