Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Functions
5 Design characteristics
5.1 Leak tightness
5.1.1 Pressure tightness
5.1.2 Drop test
5.2 Temperature range
5.3 Materials of construction
5.4 Dimensional characteristics
5.5 Electrical resistance
6 Tests
6.1 General
6.2 Production tests
6.2.1 General
6.2.2 Seat tightness test
6.2.3 Test results
6.3 Type tests
6.3.1 General
6.3.2 Seat tightness test
6.3.3 Drop test
6.3.4 Test results
7 Marking
8 Installation, operating and maintenance instructions
Annex A (normative) - Drop test apparatus
Annex B (normative) - Manhole cover assembly