EN 976-1-1997 en Underground Tanks of Glass-Reinforced Plastics (GRP) - Horizontal Cylindrical Tanks for the Non-Pressure Storage of Liquid Petroleum Based Fuels - Part 1 Requireme.pdf

1、STD-ES1 ES EN 77b-1-ENGL 1997 W 1b24bb9 Obb35bl 501 O BRITISH STANDARD Underground tanks of glass-reinforced plastics (GRP) - Horizontal cylindrical tanks for the non-pressure storage of liquid petroleum based fuels Part 1. Requirements and test methods for single wall tanks The European Standard EN

2、 9761 : 1997 has the status of a British Standard ICs 23.020.10 BS EN 976-1 1997 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW STD-BSI BS EN 77b-L-ENGL 1997 9 ZbZLibb9 Obb35b2 448 = Amd. No. BS EN 976-1 : 1997 Date nxt affected - This British Standard, having been prepared u

3、nder the direction of the Sector Board for Materiais and Chemicals, was pubiished under the authority of the Standards Board and comes into effect on 15 December 1997 0 BSI 1997 National foreword This British Standard is the English language version of EN 9761 : 1997. The UK participation in its pre

4、paration was entrusted to Technid Committee PW64, GRP tanks for underground petrol storage, which has the responribiiity to: - aid enquirers to understand the tea - present to the responsible European committee any enquiries on the intewretaton, or proposals for change, and keep the UK interests inf

5、omied - monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement intedonal or European publications referred to in t

6、his document may be found in the BSI Standards Catalogue under the section entitled International Standards Correspondence Index, or by using the fia facility of the BSI Stanards Electronic Catalogue. Compliance with a British Standard does not of itself confer immunity from legai obligations. Summa

7、ry of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 10, an inside back cover and a back cover. ISBN O 080 28929 X STD-BSI BS EN 97b-1-ENGL 1977 m 1b2Ybb7 Ubb35b3 384 m EUROPEAN STANDARID NORME EUR0PEE?E EXJROP- NORM EN 9761 July 1997 ICs 23.020.10

8、Descriptors: Petroleum products storage, storage tanks, underground tanks, thermosetting resins, reinforced plastics, ass reinforced plastics, equipment specifications, access openings, dimensions, specifications, tests, marking English veision Underground tanks of glassrreininfomd plastics (GRP) -

9、Horizontal cylindrical tanks for the non-pmswe stowe of liquid petmleum based fuels - Part 1: Requirements and test methods for single wall tanks Rservoirs enterrs en plastiques renfos de verre (F?RV) - Rservoiis cylindriques horizontaux pour le stockage sans pression de carburants ou combustibles p

10、tsoiiers iiqyides - Partie 1: Prescriptions et mthodes d?essai pour rservoirs simple paroi Unterirdische ?lnks aus textilglasverstarkten Kunststoffen (GFK) - Liegende, zylindrische ?ILinks fr die drucklose Lagerung von flssigen KraftsbfEen auf Erdlbasis - Ri 1: Antorderungen und merfahren fr einwang

11、e %nks This European Standard was approved by CEN on 1997-06-21. CEN members are bound to comply with the CENKENELEC Intrnal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Uptodate lists and bibliographical refer

12、ences concerning such national standards may be obtained on application to the Centsal Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member in

13、to its own language and notified to the Central Secretariat has the same status as the official versions. GEN members are the Monal standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, F?rance, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugai, Sp

14、ain, Sweden, Switzerland and United Kingdom. European Committee for Standardization Comitk Europen de Normahation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1060 Brussels O 1997 GEN - Ail rights of exploitation in any form and by any means reserved worldwide for CEN na

15、tional Members. Ref. No. EN 976-1 : 1997 E STD.BSI BS EN 776-2-ENGL 2797 D lb24bb7 Obb35b4 210 Page 2 EN 9761 : 1997 Foreword This European Standard has been prepared by Technical Committee CENRY: 210, GRP tanks and vessels, the secretariat of which is held by DIN. This European Standard shall be gi

16、ven the status of a national standard, either by publication of an identical text or by endorsement, at the latest by January 1998, and conflicting nationai standards shail be withdrawn at the latest by January 1998. The 4 parts of this European Standard cover the constsuction and instabtion require

17、ments of horizontal, cylindrical GRP tanks used for the underground non-pressure storage of petroleum based fuels, e.g. petsol and diesel fuel storage in service stations, heating oil storage for buildings. The 4 parts are: Part 1: Part.2: %nsport, handing, stomge and Part 3 Part 4 Requirements and

18、test methods for single wall. tanks; installation of single waU tanks; Requimts and test methods for double Wau tanks; %nsport, handing, stowe and installation of double waU tanks. The standard is written in different parts in order to clearly define the invohrement and responsibaties of Merent pdes

19、 in the constsuction of the tank, its installation and the assurance of a good, safe performance during use. According to the CEN/CENELEC Internal Regulations, the national standards organhiions of the foilowing countries are bound to implement this European Standad Austria, Belgium, Czech Republic

20、Denmark, Finland, France, Germany, Greece, Iceland, ireland, Italy, Luxembourg, Netherlands, Norway, Po- Spain, Sweden, Switzerland and the United Kingdom. Contents page Foreword 2 1 2 3 3.1 3.2 3.3 3.4 Scope Nonnative references General Resins Reiiorcement materials Processing agents 3.6 Fillers 3.

21、6 Additives 3.7 Stnictural core 3.8 Rib core 4 pdnkconstsuction 4.1 General 4.2 Cylinder wall and tank end build-up 4.3 Jointing of cylinder wails and/or tank ends 4.4 Ihr type B tanks without manway. When required, type A tanks shall allow the installation of a flexible inner her and the tank const

22、ruction shall not impede the functioning of this her. A tank with a capacity of more than 5m3 shall be type A and thus have at least one manway pdnks that are divided in compartments shall have at least one manway that gives access to each compartment The manway lamlliate shall have a build-up which

23、 satisfies the requirements of 4.2. It shall be at least 8mmthick Bolts: number dimensions The manway barrel shal be cyhdrid (600 mm min. interrd diameter). An example of a possible construction and arrangements of the manway covers and their flanges is given in figure 2. The flexibility of any gask

24、et shall be such as to ensure Sealing. The laminate between the manway barrel and the tank shall offer adequat mechanical and chemical resistance. Nuts and bolts shaii be of non-corrdble materials (e.g. hot dip gahmized, stainless steel) and be easily replaceable. Beneath the manway on the tank bott

25、om, the internal wall of the tank shal be provided with a protection piate with a diameter at least equal to that of the manway When a GRP plate is used it shall be at least 6 mm thick; when a steel plate is used, it shall be resistant to the stored liquid or protected fmm it and have a minimum thic

26、kness of 3 mm. I 20 I M12 a) Flush-fitting b) With insert Dimensions in mm1 I Nominal manhole diameter I I 600 I I inside diameter I Dimin 1600 I Figure 2. Example of construction of circular manways O BSI 1997 STD.BS1 BS EN 57b-1-ENGL 1797 Lb24bb7 Obb35b bb Fiil pipe Page 6 EN 9761 : 1997 Minimum D

27、N Recommended DN for larger tanks (Y 15 m3) 50 100 4.6 Connected pipes and their fittings The following fittings are minmially required per compartment: Dispensingpipe Ventjngpipe 25 50 50 100 I Gawingpipe I50 I 50 I In an open system (Le. without vapour balancing), the diameter of the venting pipe

28、shouid at least be equal to that of the pipe and at least be double of that of the dispensing pipe. The tank shali be capable of accepting an overfill protection device and a vapour recovery system. The il pipe shal reach at least 20 mm deeper than the dispensing pipe. “he venting pipe shall protrud

29、e 30 to 40 mm into the tank The fittings shali be attached to the tank top either on the manway lid or on the tank waU Ail pipes inside the tank shall clear the tank bottom by at least 3% of the inside tank diameter with a minimum of 50 mm. Beneath each fitting on the tank bottom, the inted wall of

30、the tank shall be provided with a protection plae with a diameter at least equal to the fitting diameter Ali Ujngs and pipes shall be resistant to the stored iiquid andor to the soil. The distance between the gauging pipe and the tank bottom shall not be greater than 200mm. 4.7 Liwng devices The tan

31、k shail be provided with a lifting device designed to allow safe vertid lifting of the tank Lifting devices (lugs, webbings) shall be designed to take the appropriate loads. When lugs are used they shall have a 25m to 5Omm inside diameter. 4.8 Anchoring devices Each tank shall be capable of bei anch

32、ored by suitable cables (not in contact with the tank), webbing or straps. ?he manufactum shali specify and mark on the tank the anchoring positions, which shall be spaced no further apart than one tank diameter. 4.9 Static charge dissipation The tank shall be provided with an earthed conductive obj

33、ect in contact with the iquid NOTE. hks made entireiy of insuiatinp material buried underground are electridy similar to tanks with insdating inner coating. During cleaning operations precautions, such as carefully earthing the person entering the ank, should be taken for fluids with a flash point b

34、elow 66 “C. The manufm shal avise the user that the flling velocity shall not exceed: 7 m/s for a DN 50 pipe; 5,2 m/s for a DN 100 i pipe. 5 Requhments 6.1 Appearance The internai surface and ail mating surfaces of joints sha be smooth. the tolerance shall be at most 1 36 The cylinder length over di

35、ameter ratioL/z) shall be at most 6 and at least 1. The cylinder taper shall not exceed 0,1% per side. 6.3 Leaktightness When tested in accordance with 6.3, the tank shall not leak 6.4 Bending and torsion moments on fittings When tested in accordance with 6.4, the tank shall show no visual deteriora

36、tion and shall not leak when submitted to a leaktightness test according to 6.3. 6.6 Internal impact resistance When tested in accordance with 6.6, no cracking of the internai surface or a surface change visible with the dded eye shall occur. 6.6 External impact resistance When tested in accordance

37、with 6.6, the tank shail show no visual deterioration. 6.7 Lifting system loading When tested in accordance with 6.7, breaking shall not 6.8 Structural stability 5.8.1 Geneml With regard to structural stability the tanks are divided into two classes, class 1 and class 2. For the negative pressure te

38、sts defined herdr, there sha be no visuai deterioration intedy or externaly foliowing the test. occur. O BSI 1997 STD*BSI BS EN 77b-L-ENGL 1777 lb24bb9 Obb35b7 8T2 D * * VI 6.8.2 Class 1 6.8.2.1 Geneml stability When tested in accordance with 6.8, the tank shall withstand a negative pressure level,

39、in kPa, given by the equation: 55 withaminimunof5kPa P = SX.JQ (35 Wa absolute pressure) where: a is the factor as determined in 6.9.6 (the structural factor a, in the case of rib reinforced -1; is the factor as determined in 6.9.6 (the stsuctural factor s in the case of rib reinforced tanks). For e

40、ach wall construction and for each diameter, the tank tested shail have a ratio U 2 5, L being the cylinder length and D the internai cylinder diameter. 6.8.2.2 Local stab2lity in order to check local stability the manufacturer shall fabrica D is the internal cylinder diameter, in metres; a is the f

41、actor as detennined in 6.9.6 (the factor of the laminate between the ribs at in case of rib reinforced tanks); is the factor as determined in 6.9.6 (the factor of the laminate between the ribs t in case of rib reinforced tanks). 6.8.2.3 Dimasional requirement for rib reinfmed tanks A rib reinforced

42、tank shall fulfil the requirement where: D t EN is the internai cylinder diameter, in metres; is the lowest value of the laminate thickness in any section of the cylinder, in millimetres; is a reference circumferential flexural modulus of elastic Page 7 EN 9761 : 1997 E is the circumferential flexur

43、al modulus of elasticity of the cyiinder laminate as determined in 6.9.6 by external loading, in newtons per square millimetre. 6.8.3 Class 2 6.8.3.1 General stability When tested in accordance with 6.8, the tank shail withstand a negative pressure level, in kjiopascals, given by the equation: 25 wi

44、thaminimumof35kPa (5 Wa absolute pressure) p=- x $ where a and are defined as in 6.8.2.1. For each wali construction and for each diameter, the tank tested shail have a ratiouD L 5, L being the cylinder length and D the internal cylinder diameter. 6.8.3.2 Local stabity See 6.8.2.2. 6.9 Laminate requ

45、irements 6.9.1 Chemical resistance With regard to chemical resistance the tanks are divided into two grades, grade 1 and grade 2, the difference being determined by the test liquid used during chemical exposure. When tested in accordance with 6.9.2: - the fled modulus of the laminate shall be retain

46、ed at at least 80 % - the surface shall show no blisters or cracks when examined with the unaided eye. 6.9.2 Composition When tested in accordance with 6.9.3, the test results for each component shall be within f 10 % of the reference values obtained at type testing. 6.9.3 !l#?nsile properties When

47、tested in accordance with 6.9.4, the test results shall be at least 90 % of the reference vaiues obtained at type testing. 6.9.4 Flexural properties When tested in accordance with 6.9.6, the test results shall be at least 90 % of the reference dues obtained at type ksting. 6.9.6 Factor a and factor

48、in bending When measured in accordance with 6.9.6 factor a and factor shall meet the following requirements: a 2 0,5 h 0,6 6.10 Structural core properties When a smctural core is used, the core material sha be tested in accordance with 6.10 and the test results sha be at least 90 % of the reference

49、values obta.ined at type testing. O BSI 1997 Page 8 EN 976-1 : 1997 6 !hst methods 6.1 General Conditioning of the test specimens is not required unless otherwise specified by the test method Conduct the tests at ambient conditions without any special controls on temperature or relative humidity unless otherwise specified by the test method 6.2 Dimensions Measure ali dimensional parameters of importance, ie. diameter, thichess, rib spacing, length Measure the dimensions other than thickness to the nearest 1 mm.