NBN EN 681-1 : 1996 AMD 3 2005

Foreword
Introduction
1 Scope
2 Normative references
3 Classification
4 Requirements
5 Test pieces and temperature
6 Quality
7 Factory product control tests
8 Storage
9 Designation
10 Marking and labelling
Annexes
A (normative) Determination of stress relaxation in
    tension
B (normative) Determination of compression set in hot
    water at 110 Degree C
C (normative) Determination of splice strength
D (informative) Guidance on storage of seals
ZA (informative) Clauses of this European
    Standard addressing the provisions of the
    EU Construction Products Directive

Defines requirements for materials used in vulcanized rubber seals for cold potable water supply (up to 50 degree C), hot potable and non-potable water supply (to 110 degree C) and drainage, sewerage and rainwater systems (continuous flow to 45 degree C and intermittent flow up to 95 degree C). Applies to seals for all materials including iron, steel, clay, fibre cement, concrete, reinforced concrete, plastics and glass-reinforced plastic.