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