By Gerhard Hiltscher;Wolfgang M?hlthaler;J?rg Smits
Pigs are snug-fitting plugs that are in a position to practice a number of upkeep projects similar to cleansing or removal deposits or blockages in pipe and pipeline structures from the interior. A gaseous or liquid propellant is used to push the pig throughout the method. This technique avoids rinsing lack of important product, presents relief of difficult environmental affects, and earnings excessive potency for much less funding. The e-book describes in actual fact and methodically the $64000 simple gear required for the making plans and layout of pigging devices. Many functional examples are proven for the operation of commercial pigging devices, drawn from the authors' longtime adventure during this know-how. during this shape and scope the e-book is an unmatched presentation of this expertise. Engineers and chemists who plan, build, function and keep creation crops within the chemical, meals, cosmetics, pharmaceutical and petrochemical will locate a useful resource of recommendation and reference for pigging devices.
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Extra info for Industrial Pigging Technology: Fundamentals, Components, Applications
Which contaminations are permissible after product change? Rinsing procedures with small amounts of cleaning agent solvent are possible only with a TPS. Next, information on the product properties relevant to the pigging procedure is required. Is a one-product pigging line involved, or are several products to be conveyed by a pigging line? In a one-product pigging line the only possibility is emptying by means of a pig. In a multiproduct pigging unit possible small levels of contamination by the previous product must be considered.
The chemical resistance of pig materials is indicated in the Appendix. The data are derived from test results, recommendations of chemical suppliers, and user experience. Nevertheless, they serve only for orientation and are not applicable to all operating conditions. 2). 2 Materials Selection The correct selection of pig materials requires knowledge of the fundamental groups of materials, for example: . Rubber is a non-crossed-linked but cross-linkable (vulcanizable) polymer, which can be transformed by vulcanization into the rubber-elastic state.
In the following the different possible constellations are described for the example of a simple pigging unit. , the pipelines are pressure-free. The location of the pig (P) in the initial position (starting state) must be defined: the pig can be parked either in the launching station (LS) or in the receiving station (RS). , with air, propellant, or product). , gases must be pressure-relieved and liquids must not be confined. Often product pumping can be started without pig travel. The piggable line (PL) in the initial state is already prepared for the product feeding.
Industrial Pigging Technology: Fundamentals, Components, Applications by Gerhard Hiltscher;Wolfgang M?hlthaler;J?rg Smits