{"id":272984,"date":"2024-10-19T18:19:35","date_gmt":"2024-10-19T18:19:35","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-en-4882011a12014\/"},"modified":"2024-10-25T14:40:17","modified_gmt":"2024-10-25T14:40:17","slug":"bs-en-4882011a12014","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-en-4882011a12014\/","title":{"rendered":"BS EN 488:2011+A1:2014"},"content":{"rendered":"

This European Standard specifies requirements and test methods for valves of prefabricated thermally insulated valve assemblies comprising a steel valve, rigid polyurethane foam insulation and an outer casing of polyethylene for use in directly buried hot water networks with pre-insulated pipe assemblies in accordance with EN 253.<\/p>\n

This European Standard applies only to insulated valve assemblies for continuous operation with hot water at various temperatures in accordance with EN 253:2009, Clause 1 and the valve assemblies with a maximum operation pressure of 25 bar. For higher pressures, additional demands apply.<\/p>\n

Guidelines for quality inspection are given in Annex A of this European Standard.<\/p>\n

\n

NOTE For this application, the following valve types are commonly used: ball valves, gate valves, and butterfly valves.<\/p>\n<\/blockquote>\n

This European Standard does not include calculation rules for loads and stresses. These depend on the configuration of the system as it is installed. The design and installation rules are given in EN 13941:2009+A1:2010.<\/p>\n

PDF Catalog<\/h4>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
6<\/td>\nForeword <\/td>\n<\/tr>\n
9<\/td>\n1 Scope
2 Normative references <\/td>\n<\/tr>\n
10<\/td>\n3 Terms and definitions <\/td>\n<\/tr>\n
11<\/td>\nFigure 1 \u2014 Example valve assembly components
4 Requirements
4.1 Pressure ratings for valves
4.1.1 General <\/td>\n<\/tr>\n
12<\/td>\n4.1.2 Valves without indicated flow direction
4.2 Service temperatures for valves
4.3 Steel parts
4.3.1 General
4.3.2 Valve
4.3.3 Valve extension pipe
4.3.4 Welding ends
4.3.5 Welding of steel parts
4.4 Casing
4.4.1 General
4.4.2 Requirements for polyethylene welding <\/td>\n<\/tr>\n
13<\/td>\n4.4.3 Diameter and wall thickness of the casing
4.5 Polyurethane rigid foam insulation (PUR)
4.5.1 General
4.5.2 Minimum insulation thickness
4.6 Valve assembly
4.6.1 Ends of valve assembly
4.6.1.1 General
4.6.1.2 Centre line deviation
4.6.1.3 Angular deviation
4.6.2 End of stem construction <\/td>\n<\/tr>\n
14<\/td>\nFigure 2 \u2014 Anti corrosion protection of the stem construction
4.6.3 Main dimensions of the valve assembly
Table 1 \u2014 Tolerances on the main valve dimensions
Figure 3 \u2014 Main dimensions <\/td>\n<\/tr>\n
15<\/td>\n4.6.4 Installation of measuring elements
4.7 Requirements for effective operation and maintenance
4.8 Resistance to axial forces and bending moments
5 Testing, test methods and test requirements
5.1 General
5.2 Test specimens
5.2.1 General <\/td>\n<\/tr>\n
16<\/td>\n5.2.2 Test specimens for type testing steel parts of valve
5.2.3 Test specimens from casings and polyurethane foam
5.3 Steel parts
5.3.1 General
5.3.2 Type test of the steel parts
5.3.2.1 General
Table 2 \u2014 Overview and sequence of the type test programme
5.3.2.2 Leak-tightness of shell and stem casing
5.3.2.3 Leak-tightness of the seat <\/td>\n<\/tr>\n
17<\/td>\n5.3.2.4 Torque load measurement of unloaded valve
5.3.2.5 Axial compressive force test
5.3.2.6 Axial tensile force test
5.3.2.7 Bending test <\/td>\n<\/tr>\n
18<\/td>\n5.3.3 Production testing of valves
5.3.3.1 General
Table 3 \u2014 Overview of the production tests
5.3.3.2 The leak-tightness test of the shell and stem casing
5.3.3.3 The leak-tightness test of the seat <\/td>\n<\/tr>\n
19<\/td>\n5.3.3.4 Testing of steel welds
5.4 Casing
5.4.1 General
5.4.2 Leak-tightness of the welded casing
5.5 Polyurethane rigid foam insulation
5.6 Valve assembly
5.7 Surveillance system
6 Marking
6.1 General
6.2 Steel valve
6.3 Casing <\/td>\n<\/tr>\n
20<\/td>\n6.4 Valve assembly
7 Installation and maintenance <\/td>\n<\/tr>\n
21<\/td>\nAnnex A (informative) Guidelines for inspection and testing
A.1 General
A.2 Manufacturer\u2019s type test
A.3 Manufacturer\u2019s quality control
A.4 External inspection
A.5 Extent of inspection
A.6 Manufacturer\u2019s responsibility <\/td>\n<\/tr>\n
22<\/td>\nTable A.1 \u2014 Steel valve inspection <\/td>\n<\/tr>\n
23<\/td>\nTable A.2 \u2014 Valve assembly inspection <\/td>\n<\/tr>\n
24<\/td>\nAnnex B (normative) Resistance to axial force and bending moment
B.1 Axial strength test
B.2 Bending test <\/td>\n<\/tr>\n
25<\/td>\nTable B.1 \u2014 Service pipe dimensions, axial test forces and test bending moments 4) <\/td>\n<\/tr>\n
26<\/td>\nAnnex C (normative) Resistance to bending forces
C.1 Resistance to bending forces
C.1.1 General
C.1.2 Formulas based on the considerations
Table C.1 \u2013 Key for the formulas in C.1.1 <\/td>\n<\/tr>\n
27<\/td>\nTable C.2 \u2013 Key for the formulas in C.1.2 and Figures C.1 to C.4
C.1.3 Standard test assembly (four point bending test)
C.1.3.1 Bending moment from test load <\/td>\n<\/tr>\n
28<\/td>\nC.1.3.2 Bending Moment from uniform load q (pipe weight and where appropriate water weight) <\/td>\n<\/tr>\n
29<\/td>\nC.1.3.3 Bending moment from valve weight
C.1.3.4 Total Bending Moment (Mtotal) due to F, P and FV <\/td>\n<\/tr>\n
30<\/td>\nC.1.4 Alternative test assembly (for diameters \u2264 DN 200 mm) \u2013 Maximum bending moment <\/td>\n<\/tr>\n
32<\/td>\nBibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

District heating pipes. Preinsulated bonded pipe systems for directly buried hot water networks. Steel valve assembly for steel service pipes, polyurethane thermal insulation and outer casing of polyethylene<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
BSI<\/b><\/a><\/td>\n2014<\/td>\n34<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":272989,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[1277,2641],"product_tag":[],"class_list":{"0":"post-272984","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-91-140-60","7":"product_cat-bsi","9":"first","10":"instock","11":"sold-individually","12":"shipping-taxable","13":"purchasable","14":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/272984","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/272989"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=272984"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=272984"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=272984"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}