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BS ISO 21051:2020

BS ISO 21051:2020

$198.66

Construction and installation of ductile iron pipeline system

Published By Publication Date Number of Pages
BSI 2020 66
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This document specifies the recommended practices and requirements for the installation of buried and above-ground ductile iron pipeline system conforming to ISO 2531, ISO 7186 and ISO 16631.

The recommended practices in this document are intended to provide the practical advices based on the best methods of construction and installation of ductile iron pipeline system including pipes, fittings, valves and accessories.

PDF Catalog

PDF Pages PDF Title
2 National foreword
7 Foreword
9 1 Scope
2 Normative references
3 Terms and definitions
10 4 Occupational safety and health requirements
5 Materials in contact with water intended for human consumption
11 6 Input control, transport, handling and storage of pipeline components and inspection
6.1 Input control
6.2 Transport, handling and storage and inspection of pipeline components
6.2.1 Transport
6.2.2 Handling
13 6.2.3 Storage
17 6.2.4 Inspection
7 Coating and lining repairs
7.1 General
7.2 Repair external coating
7.2.1 General
7.2.2 Repair procedure
18 7.3 Repair cement mortar lining
7.3.1 General
7.3.2 Repair procedure cement mortar lining
8 Cutting of pipes and ovality correction
8.1 Cutting of pipes
8.1.1 General
19 8.1.2 Pipe cutting tools
8.1.3 Chamfering of cut edge
8.1.4 Repair of damaged lining and coating
8.2 Ovality correction
22 9 Site preparation and pipe trenches
9.1 Trench width
9.2 Trench excavation and minimum depth of cover
9.2.1 General
9.2.2 Minimum depth of cover
9.2.3 Regulations
23 10 Pipeline protection
10.1 General
10.2 Site applied polyethyelene sleeving
11 Laying of pipes
11.1 Precautions at site before laying
11.1.1 General
11.1.2 Preparation before pipe laying and jointing
24 11.2 Construction of pipe trenches
11.2.1 General
11.2.2 Bedding
25 11.2.3 Trench types
27 11.2.4 Soil types
28 11.3 Safety, protection of property and structures
12 Push-in joints, jointing and anchoring
12.1 Preparations before jointing
12.2 Push-in joints
12.2.1 General
29 12.2.2 Push-in joint assembly for the pipes
35 12.2.3 Jointing of push-on fittings
12.2.4 Jointing of fittings by jointing tackle (assembler)
36 12.2.5 Jointing of fittings by winch method
12.2.6 Maximum joint deflection and laying length
37 12.2.7 Inspection of the joint
38 12.2.8 Dismantling of Joint
12.3 Mechanical joints
12.3.1 General
39 12.3.2 Mechanical joint assembly for pipes
41 12.4 Flanged Joints
12.4.1 General
12.4.2 Flange bolting tightening sequence
42 12.4.3 Maximum bolt tightening torque
43 13 Functional features and installation of valves
13.1 Installation of valves
13.1.1 General
13.1.2 Air valves
44 13.1.3 Scour valves or drain valves
13.1.4 Isolation valves
45 13.1.5 Hydrants
13.1.6 Surge limiting equipment
14 Restrained joints and thrust blocks
15 Cleaning, hydraulic testing and commissioning of pipeline and pipeline components
15.1 Cleaning
46 15.2 Hydraulic testing
16 Flushing and disinfection
17 Service connections
17.1 General
47 17.2 Conventional type service connection
17.3 External seal type connection
48 17.4 Saddle for ductile iron pipes for distribution network
49 18 Supporting pipes
18.1 General
18.2 Support for above ground installation
18.3 Maximum span for river crossing
50 18.4 Laying of ductile iron (DI) pipes in hilly terrain
18.4.1 General
18.4.2 Pipe line anchoring on slope
52 18.4.3 Basic precaution during trenching and bed preparation for pipes on slope
53 18.4.4 Additional precautions during laying in a hilly and rocky terrain
54 18.4.5 Precaution in snow bound areas
55 19 Railroad and highway crossings
56 Annex A (normative) Site applied polyethylene sleeving
65 Bibliography

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BS ISO 21051:2020
$198.66