09/30197069 DC : 0
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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BS EN 488 - 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
Hardcopy , PDF
30-04-2011
English
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Requirements
4.1 Pressure ratings for valves
4.1.1 General
4.1.2 Valves without indicated flow direction
4.2 Service temperatures for valves
4.3 Steel parts
4.3.1 Valve Body
4.3.2 Valve steel pipe
4.3.3 Welding ends
4.3.4 Welding
4.4 Casing
4.4.1 General
4.4.2 Requirements for polyethylene welding
4.4.3 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
4.6.2 End of stem construction
4.6.3 Tolerances on the main dimensions
4.6.4 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
5.2.2 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 Type test
5.3.2 Leak-tightness of shell and stem casing
5.3.3 Leak-tightness of the seat
5.3.4 Torque load measurement of unloaded
valve
5.3.5 Axial compressive force test
5.3.6 Axial tensile force test
5.3.7 Bending test
5.3.8 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
5.8 Leak testing of valves
6 Marking
6.1 General
6.1.1 Steel valve
6.1.2 Casing
6.1.3 Valve assembly
7 Installation and maintenance
Annex A (informative) - Guidelines for inspection
and testing
Annex B (normative) - Resistance to axial force
and bending moment
Annex C (normative) - Resistance to bending forces
BS EN 488
| Committee |
RHE/9
|
| DocumentType |
Draft
|
| Pages |
31
|
| PublisherName |
British Standards Institution
|
| Status |
Superseded
|
| SupersededBy |
| EN 13941:2009+A1:2010 | Design and installation of preinsulated bonded pipe systems for district heating |
| EN 448:2015 | District heating pipes - Preinsulated bonded pipe systems for directly buried hot water networks - Fitting assemblies of steel service pipes, polyurethane thermal insulation and outer casing of polyethylene |
| EN 12266-1:2012 | Industrial valves - Testing of metallic valves - Part 1: Pressure tests, test procedures and acceptance criteria - Mandatory requirements |
| EN 14419:2009 | District heating pipes - Preinsulated bonded pipe systems for directly buried hot water networks - Surveillance systems |
| EN ISO 9001:2015 | Quality management systems - Requirements (ISO 9001:2015) |
| ISO 9001:2015 | Quality management systems — Requirements |
| EN 253:2009+A2:2015 | District heating pipes - Preinsulated bonded pipe systems for directly buried hot water networks - Pipe assembly of steel service pipe, polyurethane thermal insulation and outer casing of polyethylene |
| EN 19:2016 | Industrial valves - Marking of metallic valves |
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