BS EN 969:2009
Current
The latest, up-to-date edition.
Ductile iron pipes, fittings, accessories and their joints for gas pipelines. Requirements and test methods
Hardcopy , PDF
English
30-04-2009
Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Technical requirements
4.1 General
4.1.1 Ductile iron pipes and fittings
4.1.2 Surface condition and repair
4.1.3 Types of joints and interconnection
4.2 Dimensional requirements
4.2.1 Wall thickness
4.2.2 Diameter
4.2.3 Length
4.2.4 Straightness of pipes
4.3 Material characteristics
4.3.1 Tensile properties
4.3.2 Hardness
4.4 Coatings and linings for pipes
4.4.1 General
4.4.2 External coating of zinc with finishing
layer
4.5 Coatings for fittings and accessories
4.5.1 General
4.5.2 Paint coatings
4.6 Marking of pipes and fittings
4.7 Leak tightness
5 Performance requirements for joints
5.1 General
5.2 Flexible joints
5.2.1 General
5.2.2 Test conditions
5.2.3 Test parameters
5.3 Restrained flexible joints
5.4 Flanged joints as cast, screwed, welded and
adjustable
6 Test methods
6.1 Pipe dimensions
6.1.1 Wall thickness
6.1.2 External diameter
6.1.3 Internal diameter
6.1.4 Length
6.2 Straightness of pipes
6.3 Tensile testing
6.3.1 Samples
6.3.2 Preparation of test bar
6.3.3 Apparatus and test method
6.3.4 Test results
6.4 Brinell hardness
6.5 Works leak tightness test for pipes and fittings
6.5.1 General
6.5.2 Centrifugally cast pipes
6.5.3 Pipes not centrifugally cast and fittings
6.6 Zinc mass
6.7 Thickness of paint coatings
7 Performance test methods
7.1 Leak tightness of flexible joints to positive
internal pressure
7.2 Leak tightness of flexible push-in joints to
positive external pressure
7.3 Leak tightness and mechanical resistance of
flanged joints
8 Tables of dimensions
8.1 Socket and spigot pipes
8.2 Flanged pipes
8.2.1 General
8.2.2 Centrifugally cast pipes with welded
flanges
8.2.3 Centrifugally cast pipes with screwed
flanges
8.2.4 Pipes with integrally cast flanges
8.3 Fittings for socketed joints
8.3.1 General
8.3.2 Flanged sockets
8.3.3 Flanged spigots
8.3.4 Collars
8.3.5 Double socket 90 degrees (1/4) bends
8.3.6 Double socket 45 degrees (1/8) bends
8.3.7 Double socket 22 degrees 30' (1/16) bends
8.3.8 Double socket 11 degrees 15' (1/32) bends
8.3.9 All socket tees
8.3.10 Double socket tees with flanged
branch, DN 40 to DN 250
8.3.11 Double socket tees with flanged
branch, DN 300 to DN 600
8.3.12 Double socket tapers
8.4 Fittings for flanged joints
8.4.1 Double flanged 90 degrees (1/4) bends
8.4.2 Double flanged duckfoot 90 degrees (1/4)
bends
8.4.3 Double flanged 45 degrees (1/8) bends
8.4.4 Double flanged 22 degrees 30' (1/16) bends
8.4.5 Double flanged 11 degrees 15' (1/32) bends
8.4.6 All-flanged tees, DN 40 to DN 250
8.4.7 All-flanged tees, DN 300 to DN 600
8.4.8 Double flanged tapers
8.4.9 Blank flanges PN 10
8.4.10 Blank flanges PN 16
8.4.11 Reducing flanges PN 10
8.4.12 Reducing flanges PN 16
9 Evaluation of conformity
9.1 General
9.2 Initial performance testing
9.2.1 General
9.2.2 Characteristics
9.2.3 Treatment of calculated values and design
9.2.4 Sampling, testing and conformity criteria
9.3 Factory production control (FPC)
9.3.1 General
9.3.2 FPC requirements for all manufacturers
9.3.3 Manufacturer-specific FPC system requirements
Annex A (normative) - Longitudinal bending resistance of
pipes
Annex B (normative) - Diametral stiffness of pipes
Annex C (informative) - Field of use, characteristics of
soils
Annex D (informative) - Calculation method of buried
pipelines, heights of cover
D.1 Calculation method
D.1.1 Calculation formula
D.1.2 Pressure from earth loading
D.1.3 Pressure from traffic loading
D.1.4 Bedding factor, K
D.1.5 Factor of lateral pressure, f
D.1.6 Modulus of soil reaction, E'
D.2 Heights of cover
Annex ZA (informative) - Clauses of this European Standard
addressing essential requirements or other
provisions of EU Directives
ZA.1 Scope and relevant characteristics
ZA.2 Procedure for attestation of conformity of
ductile iron pipes, fittings, accessories
and their joints for gas applications
ZA.2.1 System of attestation of conformity
ZA.2.2 Declaration of conformity
ZA.3 CE marking and labelling
Bibliography
Access your standards online with a subscription
Features
-
Simple online access to standards, technical information and regulations.
-
Critical updates of standards and customisable alerts and notifications.
-
Multi-user online standards collection: secure, flexible and cost effective.