BS EN 976-1-1997 Underground tanks of glass-reinforced plastics (GRP) - Horizontal cylindrical tanks for the non-pressure storage of liquid petroleum based fuels - Requirements and.pdf

1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 976-1 : 1997 The Eu

2、ropean Standard EN 976-1 : 1997 has the status of a British Standard ICS 23.020.10 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Underground tanks of glass-reinforced plastics (GRP) Horizontal cylindrical tanks for the non-pressure storage of liquid petroleum based fuels Par

3、t 1. Requirements and test methods for single wall tanksThis British Standard, having been prepared under the direction of the Sector Board for Materials and Chemicals, was published under the authority of the Standards Board and comes into effect on 15 December 1997 BSI 1997 ISBN 0 580 28929 X BS E

4、N 976-1 : 1997 Amendments issued since publication Amd. No. Date Text affected National foreword This British Standard is the English language version of EN 976-1 : 1997. The UK participation in its preparation was entrusted to Technical Committee PRI/64, GRP tanks for underground petrol storage, wh

5、ich has the responsibility to: aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK.

6、A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled Interna

7、tional Standards Correspondence Index, or by using the Find facility of the BSI Standards Electronic Catalogue. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN title pa

8、ge, pages 2 to 10, an inside back cover and a back cover.CEN European Committee for Standardization Comite Europe en de Normalisation Europa isches Komitee fu r Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1997 CEN All rights of exploitation in any form and by any means reserved

9、worldwide for CEN national Members. Ref. No. EN 976-1 : 1997 E EUROPEAN STANDARD EN 976-1 NORME EUROPE ENNE EUROPA ISCHE NORM July 1997 ICS 23.020.10 Descriptors: Petroleum products storage, storage tanks, underground tanks, thermosetting resins, reinforced plastics, glass reinforced plastics, equip

10、ment specifications, access openings, dimensions, specifications, tests, marking English version 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

11、Re servoirs enterre s en plastiques renforce sd e verre (PRV) Re servoirs cylindriques horizontaux pour le stockage sans pression de carburants ou combustibles pe troliers liquides Partie 1: Prescriptions et me thodes dessai pour re servoirs a simple paroi Unterirdische Tanks aus textilglasversta rk

12、ten Kunststoffen (GFK) Liegende, zylindrische Tanks fu r die drucklose Lagerung von flu ssigen Kraftstoffen auf Erdo lbasis Teil 1: Anforderungen und Pru fverfahren fu r einwandige Tanks This European Standard was approved by CEN on 1997-06-21. CEN members are bound to comply with the CEN/CENELEC In

13、ternal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN mem

14、ber. 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 into its own language and notified to the Central Secretariat has the same status as the official versions. CEN member

15、s are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.Page 2 EN 976-1 : 1997 BSI 1997 Foreword This European Standard has be

16、en prepared by Technical Committee CEN/TC 210, GRP tanks and vessels, the secretariat of which is held by DIN. 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 January 1998, and conflicting nationa

17、l standards shall be withdrawn at the latest by January 1998. The 4 parts of this European Standard cover the construction and installation requirements of horizontal, cylindrical GRP tanks used for the underground non-pressure storage of petroleum based fuels, e.g. petrol and diesel fuel storage in

18、 service stations, heating oil storage for buildings. The 4 parts are: Part 1: Requirements and test methods for single wall tanks; Part 2: Transport, handling, storage and installation of single wall tanks; Part 3: Requirements and test methods for double wall tanks; Part 4: Transport, handling, st

19、orage and installation of double wall tanks. The standard is written in different parts in order to clearly define the involvement and responsibilities of different parties in the construction of the tank, its installation and the assurance of a good, safe performance during use. According to the CE

20、N/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden

21、, Switzerland and the United Kingdom. Contents Page Foreword 2 1 Scope 3 2 Normative references 3 3 Materials 3 3.1 General 3 3.2 Resins 3 3.3 Reinforcement materials 3 3.4 Processing agents 3 Page 3.5 Fillers 3 3.6 Additives 3 3.7 Structural core 3 3.8 Rib core 3 4 Tank construction 4 4.1 General 4

22、 4.2 Cylinder wall and tank end build-up 4 4.3 Jointing of cylinder walls and/or tank ends 4 4.4 Tank ends 5 4.5 Manways 5 4.6 Connected pipes and their fittings 6 4.7 Lifting devices 6 4.8 Anchoring devices 6 4.9 Static charge dissipation 6 5 Requirements 6 5.1 Appearance 6 5.2 Dimensions 6 5.3 Lea

23、ktightness 6 5.4 Bending and torsion moments on fittings 6 5.5 Internal impact resistance 6 5.6 External impact resistance 6 5.7 Lifting system loading 6 5.8 Structural stability 6 5.9 Laminate requirements 7 5.10 Structural core properties 7 6 Test methods 8 6.1 General 8 6.2 Dimensions 8 6.3 Leakt

24、ightness 8 6.4 Bending and torsion moments on fittings 8 6.5 Internal impact resistance 8 6.6 External impact resistance 8 6.7 Lifting system loading 8 6.8 Negative pressure test 8 6.9 Tests on laminate 8 6.10 Structural core properties 9 7 Marking 9 Annexes A (informative) A-deviations 10Page 3 EN

25、976-1 : 1997 BSI 1997 1 Scope This Part 1 of European Standard EN 976 specifies the requirements and associated test methods for horizontal, cylindrical single wall tanks made of glass reinforced thermosetting resins (hereafter called tanks), and for their accessories, used for the underground non-p

26、ressure storage of liquid petroleum based fuels. The tanks specified by this European Standard are tanks with one or more compartments and with or without the possibility of leak detection. This European Standard covers two types of tanks, type A with manway, type B without manway and two classes of

27、 tank stiffness, class 1 and class 2. It also covers two grades of tanks, grade 1 for use with all petroleum based fuels and grade 2 limited to use with diesel fuels and heating oils. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publ

28、ications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revisi

29、on. For undated references the latest edition of the publication referred to applies. EN 61 : 1977 Glass reinforced plastics Determination of tensile properties EN 63 : 1977 Glass reinforced plastics Determination of flexural properties Three point method EN 590 : 1993 Automotive fuels Diesel Requir

30、ements and methods of test EN 637 : 1994 Plastics piping systems Glass-reinforced plastics components Determination of the amounts of constituents using the gravimetric method EN 977 Underground tanks of glass-reinforced plastics (GRP) Method for one side exposure to fluids EN 978 Underground tanks

31、of glass-reinforced plastics (GRP) Determination of factor a and factor b ISO 844 : 1978 Cellular plastics Compression test for rigid materials ISO 1922 : 1981 Cellular plastics Determination of shear strength of rigid materials 3 Materials 3.1 General The tanks are made of thermosetting resins inco

32、rporating reinforcement materials and processing agents and possibly fillers and/or additives. The specific materials selection is based on the finished tank meeting all the requirements of this European Standard. 3.2 Resins The thermosetting resins used shall be unsaturated polyester and phenylacry

33、late (vinylester) resins. 3.3 Reinforcement materials The reinforcement shall be E-type glass with a sizing allowing bonding between glass and resin. The glass may be in the form of cut or uncut rovings, mats or fabrics. Other types of surface reinforcement materials (C or E glass or suitable synthe

34、tic materials) may be used, in particular for the in- and outside layers of the tank. Surfacing mats shall be E-type glass, C glass or synthetic materials. 3.4 Processing agents Processing agents, for example catalysts, accelerators, inhibitors, monomers, hardeners and thixotropic agents, are added

35、to the resin as needed. 3.5 Fillers Fillers are inert materials mainly intended to add bulk. Fillers can be used in the structural wall but shall not be used in the internal and external layers. Their maximum particle size shall not exceed the lesser of the two values, 1 mm or 1/5 of the total wall

36、thickness. The use of fillers shall not prevent visual inspection. 3.6 Additives Additives are materials such as fire retarding agents, pigments, etc. Additives shall be inert with respect to the environment, the other materials and the tank contents. The use of additives shall not prevent visual in

37、spection. 3.7 Structural core A structural core is a build-up of materials, e.g. foam or honeycomb, to obtain the necessary stiffness of a sandwich construction. The structural core shall allow proper adhesion to the inner and outer GRP laminate. 3.8 Rib core A rib core is a material (such as foam,

38、cardboard or moulded plastic) applied on to the cylinder wall and over which a stiffening rib is laminated. The rib core is not required to have a structural contribution in itself and bond of the rib material to the core is also not required.Page 4 EN 976-1 : 1997 BSI 1997 l 2 1 6t 1 l 1 1 0t 1 l 2

39、 l 1 l 3 6t 2 t 2 0,5 t 1 t 3 2mm Figure 1. Possible execution of a butt joint 4 Tank construction 4.1 General The tank consists of a cylinder wall (e.g. solid wall with or without ribs, sandwich construction), tank ends, manways, fittings and other accessories. The parts of the tank wall directly b

40、eneath openings (see 4.5 and 4.6) shall be provided with a protection plate. 4.2 Cylinder wall and tank end build-up 4.2.1 Internal layer The internal surface shall be smooth and resistant to the stored liquid. The internal layer shall be fabricated from chopped glass fibres and resin. The internal

41、layer shall be finished with a resin surface layer of minimum 0,2 mm thick; any reinforcement provided shall be a surfacing mat. When the thickness of the resin surface layer is more than 0,3 mm, surfacing mat reinforcement shall be provided. 4.2.2 Structural wall The structural wall shall be constr

42、ucted from resin and E-type glass. Fillers and additives may be used. The structural wall may also include stiffening elements such as ribs or a sandwich structure. 4.2.3 External layer The external layer shall be resistant to soils, ground water and to any spilled liquid. The external layer shall b

43、e fabricated from chopped glass fibres and resin. The external layer shall be finished with a resin surface layer of minimum 0,2 mm thick; any reinforcement provided shall be a surfacing mat. When the thickness of the resin surface layer is more than 0,3 mm, surfacing mat reinforcement shall be prov

44、ided. 4.3 Jointing of cylinder walls and/or tank ends 4.3.1 General Joints shall have a load bearing capacity and a resistance to chemicals at least as good as the jointed parts. Cut edges shall be treated to preserve the mechanical and chemical properties. 4.3.2 Socket joints If the jointed parts a

45、re constructed with the same resin throughout the full wall and if the assembly is finished on the outside with a laminate of calculated thickness and with a total length to each side of at least 16 times the thickness of the thickest of the jointed parts, there is no special requirement for the ins

46、ide finish of the joint. If one of these conditions is not fulfilled, the inside of the joint shall be finished with a layer containing the equivalent of two mats of 450 g/m 2 over a length at each side of at least 16 times the thickness of the thickest of the jointed parts. This finishing layer sha

47、ll fulfil the requirements of 4.2.1. 4.3.3 Butt joints If the jointed parts are constructed with the same resin throughout the full wall and if the distance between the stiffening ribs embracing the joint is at most equal to 900 mm, there is no special requirement for the inside finish of the joint.

48、 The outside of the joint shall be covered with a laminate with a total length to each side of at least 16 times its thickness and of a thickness at least equal to the thickness of the thicker of the jointed parts. If one of the conditions of the first paragraph is not fulfilled, two solutions are p

49、ossible. 1) The inside of the joint shall be finished with a layer containing the equivalent of two mats of 450 g/m 2 over a length at each side of at least 16 times the thickness of the thicker of the jointed parts. This finishing layer shall fulfil the requirements of 4.2.1. 2) The joint shall be constructed according to figure 1, whereby the V shaped joint opening shall be laminated using a resin with chemical characteristics at least equal to the chemical characteristics of the internal layer. B