SIST EN 16752:2015

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Kreiselpumpen - Abnahmeprüfung für PackungenPompes centrifuges - Procédure d'essai pour garnitures tresséesCentrifugal pumps - Test procedure for seal packings23.080ýUSDONHPumps21.140Tesnilke, mašilkeSeals, glandsICS:Ta slovenski standard je istoveten z:EN 16752:2015SIST EN 16752:2015en,fr,de01-november-2015SIST EN 16752:2015SLOVENSKI
STANDARD



SIST EN 16752:2015



EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 16752
September
t r s w ICS
t sä s v râ
t uä r z r English Version
Centrifugal pumps æ Test procedure for seal packings Pompes centrifuges æ Procédure d 5essai pour garnitures tressées
Kreiselpumpen æ Abnahmeprüfung für Packungen This European Standard was approved by CEN on
s August
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egulations which stipulate the conditions for giving this European Standard the status of a national standard without any alterationä Upætoædate lists and bibliographical references concerning such national standards may be obtained on application to the CENæCENELEC Management Centre or to any CEN memberä
translation under the responsibility of a CEN member into its own language and notified to the CENæCENELEC Management Centre has the same status as the official versionsä
CEN members are the national standards bodies of Austriaá Belgiumá Bulgariaá Croatiaá Cyprusá Czech Republicá Denmarká Estoniaá Finlandá Former Yugoslav Republic of Macedoniaá Franceá Germanyá Greeceá Hungaryá Icelandá Irelandá Italyá Latviaá Lithuaniaá Luxembourgá Maltaá Netherlandsá Norwayá Polandá Portugalá Romaniaá Slovakiaá Sloveniaá Spainá Swedená Switzerlandá Turkey andUnited Kingdomä
EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
Avenue Marnix 17,
B-1000 Brussels
9
t r s w CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä EN
s x y w tã t r s w ESIST EN 16752:2015



EN 16752:2015 (E) 2 Contents Page European foreword . 3 1 Scope . 4 2 Normative references . 4 3 Terms and definitions . 4 4 Test facility, testing apparatus . 4 5 Pre-test procedure . 7 6 Installation . 7 7 Test conditions . 8 7.1 General . 8 7.2 Test medium . 8 7.3 Shaft diameter . 8 7.4 Packing cross section . 8 7.5 Surface speed . 8 7.6 Pressure . 8 7.7 Tightness-classes. 8 8 Test Procedure . 8 8.1 Break-in period . 8 8.2 Test duration . 9 8.3 Result recording . 9 8.4 Gland adjustments . 9 8.5 Number of tests . 9 8.6 Test completion . 9 9 Reporting . 9 Annex A (normative)
Packing test report template . 11 Annex B (informative)
Typical graphical representation of results . 14 Bibliography . 15
SIST EN 16752:2015



EN 16752:2015 (E) 3 European foreword This document (EN 16752:2015) has been prepared by Technical Committee CEN/TC 197 “Pumps”, the secretariat of which is held by AFNOR. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by March 2016, and conflicting national standards shall be withdrawn at the latest by March 2016. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. SIST EN 16752:2015



EN 16752:2015 (E) 4 1 Scope This European Standard gives details of a test procedure for packings to be used to seal the stuffing boxes of centrifugal pumps. It gives provisions on the design of test equipment, standard test parameters and reporting criteria. It does not specify performance criteria which should be agreed between supplier and customer, but does define 3 tightness classes. When necessary, this European Standard is also applicable to packings used on other rotary equipment such as mixers and agitators. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN ISO 286-2, Geometrical product specifications (GPS) — ISO code system for tolerances on linear sizes — Part 2: Tables of standard tolerance classes and limit deviations for holes and shafts (ISO 286-2) 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 stuffing box space into which compression packing is inserted Note 1 to entry: Stuffing box is also known as packing gland. 3.2 gland follower part that provides into a stuffing box to compress a packing set or a packing ring 3.3 shaft metal rod connecting the impeller of a pump to the motor 3.4 leakage flow of liquid permitted to pass the packing 3.5 housing bore dimension of the annular space that packing is inserted into 4 Test facility, testing apparatus The test facility shall be arranged as described in Figure 1. SIST EN 16752:2015



EN 16752:2015 (E) 5
Key 1 tank 2 valve 3 direction of flow 4 pump 5 pressure container 6 water circulation pump 7 pressure gauge 8 flow measurement 9 drain 10 inlet temperature gauge 11 outlet temperature gauge 12 testing apparatus 13 alternate return line 14 heat exchanger Figure 1 — Test arrangement The testing apparatus shall be compliant with the description given in Figure 2. In particular, it shall consist of a suitable housing for retaining the test fluid and either one or more stuffing boxes to house the test packing. Each stuffing box shall be fitted with a gland follower and suitable retaining plate capable of controlled axial adjustment. There shall be a test shaft mounted on suitable bearings and attached to a suitable drive mechanism. SIST EN 16752:2015



EN 16752:2015 (E) 6
Key 1 motor 2 test shaft 3 gland follower 4 stuffing box 5 test packing 6 torque measurement 7 gland follower temperature 8 water in 9 water out 10 shaft leakage measurement 11 gland leakage measurement Figure 2 — Testing apparatus details The testing apparatus shall also conform to the following additional requirements: a) the shaft speed shall be controlled within a maximum variation of ± 5 %; b) the test head shall be designed and constructed so as to maintain stuffing box bore alignment relative to the shaft axis within 0,10 mm; c) the design of the test head and support shall ensure minimum vibration; d) the surface roughness of the stuffing box bore shall be no worse than 1,6 µm Ra. The surface roughness of the shaft shall be no worse than 0,4 µm Ra and the shaft shall be free of helical machine marks; e) shaft and housing shall be manufactured from corrosion resistant stainless steel (e.g. 1.4016 or 1.4404 in accordance with EN 10088-1) without surface coating and shaft hardness shall be 40 HRC minimum; f) the tolerances on shaft and stuffing box bore shall be h10 and H10 respectively in acco
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