Yearbook 2013/2014 - ehedg

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EHEDG Subgroups 173 EHEDG Subgroup “Separators” Reinhard Moss, e-mail: reinhard.moss@gea.com The Subgroup Separators is working on a new EHEDG document dealing with the hygienic aspects of disc stack centrifuges. These machines are used to separate fractions with different densities of liquid food products or to remove dense solid matter from products. Doc. 42 “Disc Stack Centrifuges” will be finished in spring <strong>2013</strong>. Many of the design principles applicable to this kind of equipment are already shown in the EHEDG Guidelines Doc. 8 Hygienic equipment design criteria; Doc. 9 Welding stainless steel to meet hygienic requirements; Doc. 10 Hygienic design of closed equipment for the processing of liquid food; Doc. 16 Hygienic pipe couplings • Doc. 9 Welding stainless steel to meet hygienic requirements • Doc. 10 Hygienic design of closed equipment for the processing of liquid food • Doc. 16 Hygienic pipe couplings • Doc. 17 Hygienic design of pumps, homogenizers and dampening devices • Doc. 32 Materials of construction for equipment in contact with food • Doc. 35 Welding of stainless steel tubing in the food Industry The document was revised several times and descriptions for the hygienic design of special areas were added. Also illustrations, drawings and pictures were added to get the sanitary problem zones across to the users of the guideline. The Subgroup has defined specific rules applicable to the CIP-cleaning capability of separators which are not yet covered by existing EHEDG documents. Also other special hygienic design features necessary for this kind of machinery are also described. A final draft of the Guideline is currently going through the EHEDG Guideline approval process. Chairman: Reinhard Moß GEA Mechanical Equipment GEA Westfalia Separator Group GmbH Operative Technical Services Phone: +49 2522 77-2571 Fax: +49 2522 77-32571 Mobile: +49 172 536 8803 E-mail: reinhard.moss@gea.com EHEDG Subgroup “Tank Cleaning” Design of tanks for cleanability and using cleaning devices Bo Boye Busk Jensen, e-mail: bobb.jensen@alfalaval.com The workgroup started at the beginning of 2012. The objective of the guideline has been discussed and is currently described as: “This guideline is intended to provide recommendations on cleaning aspects and hygienic design of vessels. It is limited to product contact surfaces of tanks for liquid processing, both vertical, horizontal and of any arbitrary shape. Excluded are the selection of chemistry and temperature for cleaning specific products.” The guideline will cover many different aspects related to the hygienic design of tanks, their appurtenances, the installation of such in tanks and the cleaning technology chosen for CIP cleaning. The focus of the guideline is on how the differences in the choice of tank cleaning technology influence the hygienic design criteria for appurtenances used in and on tanks. The available tank cleaning technology and its design will be presented from the point of view of its functionality in order to allow users to make the most sensible choice of tank cleaning equipment for their tank, tank design and product. The cleaning mechanisms during tank cleaning somewhat differ from those encountered in a closed pipe system. The tanks and appurtenances are rarely cleaned by a pressurized liquid flowing through the tank, but rather by a film or local high impact cleaning. Also, the category of soil may influence the best value for money choice when selecting tank cleaning technology and cleaning strategy. Finally, validation of tank cleaning is also included as this is a prerequisite for a satisfactory and consistent cleaning of a Chairman: Bo Boye Busk Jensen Alfa Laval Tank Equipment A/S Baldershoej 19 2635 ISHOEJ DENMARK Phone: (+45 43) 55 86 88 Fax: (+45 43) 55 86 03 E-mail: bobb.jensen@alfalaval.com
174 EHEDG Subgroups EHEDG Subgroup “Test Methods” The EHEDG Test Methods Subgroup was one of the first Subgroups established by EHEDG and is responsible for publishing test methods, defining validation criteria and providing assessments of equipment according to the hygienic design criteria of EHEDG in conjunction with the EHEDG Certification Scheme Andrew Timperley, e-mail: andy.timperley@tesco.net At the beginning of 2011 the Test Methods Subgroup work was sub-divided into two divisions under the common direction of the Authorised EHEDG Test Institutes. One division has since been concentrating its efforts on the development of a new test method for evaluating ‘open’ processing equipment. This division met in April 2011 and defined various work items to develop this method. The primary task was to construct a ‘reference piece’ in order to conduct trials on various soiling, cleaning and detection techniques. Results of these initial trials have shown that it is very difficult to obtain repeatable results due to the many variables associated with the uniformity of the application of soil and controlling the cleaning procedure. However, work is ongoing in this division to investigate other techniques. Member Companies. The website will continue to be updated with this additional information and provide more benefits for EHEDG Member companies to showcase their certified equipment. The Test Institutes efforts have been concentrated on the updates of the test methods used to evaluate equipment in conjunction with the Certification Scheme and these will be reviewed by the EHEDG Executive Committee for com-ments before publishing. Additionally, the Certification Scheme has been expanded to include a new certification class, Type EL- Class II Aseptic, to enable equipment to be certified for use in Aseptic applications where CIP cleaning is not practical and the equipment must be dismantled for cleaning. The flow chart and testing matrix of the Scheme has been updated on the EHEDG website and manufacturers are encouraged to liaise with their local Test Institutes in order to co-ordinate certification activities. In September 2011 the Annual Test Institutes meeting was held at ADRIA Normandie in France to review progress on becoming an Authorised Test Institute. During the same Year EHEDG received notification that the Danish Technological Institute would resign as the Authorised Institute in Denmark and this role is now being taken up by the Danish Technical University. These new Institutes will provide accessibility to manufacturers for testing and certification of equipment in these regions and the Group will continue to work with these new Institutes to satisfy the criteria for authorisation. In September 2012, all the Test Institute representatives held their main Annual meeting at TNO in the Netherlands to review any specific issues associated with repeatability and reproducibility of the test methods and agree the next ring trial programme for <strong>2013</strong>. During this meeting the updated test methods were reviewed and the next reproducibility trial for the assessment of in-place cleanability testing was initiated. Additionally, a new structure for the website listing of certified equipment was finalised to include more information about certified equipment produced by EHEDG Figure 1. Testing Scheme As a result of the day to day testing activities of the Institutes information is collected to provide equipment manufacturers with guidance on the selection of suitable pipe couplings and process connections for hygienic integration of equipment into processing systems. This list was revised in April 2011 and is available to download from the free documents section of the Guidelines area on the website. This list will be updated as new information becomes available.
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EHEDG Yearbook 2013/2014 European H
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European Hygienic Engineering & Des
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18 Legal requirements for hygienic
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22 The importance of hygienic desig
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24 The importance of hygienic desig
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32 Particle and VOC emissions, chem
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44 Hygienic design of floor drainag
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46 Hygienic design of floor drainag
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48 Hygienic design of high performa
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52 Performance testing of air filte
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56 Spray cleaning systems in food p
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58 Spray cleaning systems in food p
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62 Environmentally friendly water b
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64 Environmentally friendly water b
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68 Flow behaviour of liquid jets im
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72 Optimisation of tank cleaning Th
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74 Optimisation of tank cleaning Re
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78 Effective tank and vessel cleani
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84 Practical considerations for cle
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86 Integrated hygienic tamper-free
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88 Damage scenarios for valves: Ide
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Material and design optimisation ca
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Improved hygienic design and perfor
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Smart hygienic solutions for the fo
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A cleaner, healthier future. Cleani
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Examination of food allergen remova
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Hygienic automation technology in f
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Cleanability test of a hygienic des
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