NEN EN 1444 : 2001

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
3.1 Pressures
3.2 System
3.3 Components
3.4 Diameters
3.5 Installation
3.6 Hydraulic design
3.7 Structural design
4 General requirements
4.1 Qualifications
4.2 Rules for the execution of construction work
4.3 Health and safety
5 Transport, handling and storage
5.1 General recommendations
5.2 Off-loading
5.3 Stacking of pipes
5.4 Storage of joints and fittings
6 Stringing out
7 Types of beddings and embedments
7.1 Bedding type A is the general recommended way
     for laying fibre-cement pipes
7.2 Bedding type B
7.3 Bedding type C is recommended in laying
     condition which require special design
     consideration
8 Excavation and preparation of the trench
8.1 General recommendations
8.2 Depth of cover
8.3 Distances from underground installation
8.4 Trench width
8.5 Trench depth
8.6 Preparation of trench bottom
9 Pre-laying inspection of components, lowering
     pipes, joints and fittings into the trench
9.1 General recommendations
9.2 Lowering by hand
9.3 Lowering with ropes
9.4 Lowering with mechanical equipment
10 Pipe laying
10.1 General recommendations
10.2 Special laying conditions
11 Jointing
11.1 General requirements
11.2 Unrestrained joints
11.3 Restrained joints
11.4 Lubrificant for joints
12 Anchorages
13 House service connections
13.1 Direct connection
13.2 Indirect connection
14 Embedment and backfilling
14.1 Partial backfilling
14.2 Backfilling after pressure testing
15 Working processes and recommended tools
16 Tool specification
16.1 General recommendations
16.2 Lathe cutter, lathe, hole cutter
16.3 Jig saw
16.4 Low speed circular saw
16.5 Chain cutter
16.6 Abrasive discs
17 Dust extraction equipment
17.1 Characteristics
17.2 Recommendations
17.3 Cleaning and disposal of the waste
Annex A (informative) A-deviations

Applicable to both types of fibre-cement pipes AT and NT, provides installation recommendations for these pipelines in above and below ground situations. Provides guidance in on-site working methods and in the selection and use of approved tools for cutting and machining fibre-cement pipes. Does not covers : - installation by thrust boring and piping jacking methods which require the use of highly specialized techniques; - problems caused by the use of special installations procedures