Sieving is the process of separating the fine material from coarse material through a meshed surface or perforated base. The method was used since the early Egyptian days as a technique to size grains. The early sieves were made of reeds and grasses.
Today the sieve test is the essential technique and often used for an even particle size distribution. At the first glance, the process of sieving appears to be elementary. There are science and art involved in producing the reliable and consistent solutions. To better understand stainless steel test sieves and its specification, read out below.
What exactly are the test sieves?
The test sieves are the measuring device used to find the size distribution of the particles in a material. It is a wire mesh of different opening to separate the particles of varying sizes. It usually consists of a mesh held in a frame.
In the laboratory applications, the frame is round in shape and is made from stainless steel or sometimes brass. The standard frame sizes are three, six, eight, ten, twelve and so on. The woven mesh is made of brass, bronze or stainless steel. For the best results and diverse applications, stainless steel is the most effective material.
The sieve testing standards are associated to the structure of the sieve frame, mesh mounted and tolerances. The basic principles are common to all the standards and variations in details. The test sieve frames are based on any fixed standards such as rigid construction, mounted without distortion, tight joint between the mesh and the frame, frame should not be made of corrosive substance, frame must be seamless, frame size should enable stacking and many more.
Recently, the methods based on laser technology, image analysis, sedimentation techniques and energy technologies have gained momentum. The procedures using the test sieves are widely used and accepted. The sieve test outcomes develop the standard against the new and advanced techniques/tools. The equipment cost for the test sieve is lower than the investment required for new methods.
Next are the sieve certifications, which are the statements that a test sieve meets and exceeds the published criteria. It is an assurance that a new sieve will perform is the best and desired way. The highest level of certification is required by the high level of tolerance. The sieve manufacturing companies provide a certificate that stated the sieve is manufactured in the conformance of the particulars and standards.
The quality control of the sieve is also constituted an important part. The process is called sieve calibration which is the method of checking a working sieve’s performance.
In short, sieves have a long history. It serves as the base for analyzing particle size in the material. Despite the advanced technology, the procedures based on sieves continue to be the main basis of size determination of the particles. For the consistent results, it is clean that sieving needs an understanding of not one, but a combination of vital factors.