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BS EN 488:2015 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 >
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BS EN 488:2015 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, 2015
- Contents Page
- European foreword
- Introduction
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- Figure 1 — Example valve assembly components
- 4 Requirements [Go to Page]
- Figure 2 — Anti corrosion protection of the stem construction [Go to Page]
- Table 1 — Tolerances on the main valve dimensions
- Figure 3 — Main dimensions [Go to Page]
- 5 Testing, test methods and test requirements [Go to Page]
- Table 2 — Overview and sequence of the type test program [Go to Page]
- Table 3 — Overview of the production tests [Go to Page]
- 6 Marking [Go to Page]
- 7 Installation and maintenance
- Annex A (informative) Guidelines for inspection and testing
- A.1 General
- A.2 Manufacturer’s type test
- A.3 Manufacturer’s quality control
- A.4 External inspection
- A.5 Extent of inspection
- A.6 Manufacturer’s responsibility
- Table A.1 — Steel valve inspection
- Table A.2 — Valve assembly inspection
- Annex B (normative) Resistance to axial force and bending moment
- B.1 Axial strength test
- B.2 Bending test
- Table B.1 — Service pipe dimensions, axial test forces and test bending moments
- Annex C (normative) Resistance to bending forces
- C.1 General
- Table C.1 — Keys for the formulae in C.2 and Figures C.1 to C.3
- C.2 Standard test assembly (four point bending test)
- C.2.1 Bending moment due to test load F
- Figure C.1 — Bending moment due to test load F
- C.2.2 Bending Moment due to uniform load q (pipe weight and if applicable the medium weight)
- Figure C.2 — Bending Moment due to uniform load q (pipe weight and applicable the medium weight)
- C.2.3 Bending moment due to valve weight Fv
- Figure C.3 — Bending moment due to valve weight Fv
- C.2.4 Total Bending Moment Mtotal due to F, P and FV
- C.2.5 Calculation of test force F
- Bibliography [Go to Page]