UL 2420:1ED 2009-07
Current
The latest, up-to-date edition.
Belowground Reinforced Thermosetting Resin Conduit (RTRC) and Fittings
Hardcopy
07-30-2009
Preface
1 Scope
2 Definitions
3 Reference publications and units of measurement
3.1 Reference publications
3.2 Units of measurement
4 Construction
4.1 General
4.2 Conduit with an integral belled end
4.3 Couplings
4.4 Elbows
4.5 Adapters
5 Qualification tests
5.1 Conditioning
5.2 Compression
5.3 Impact resistance at low temperature
5.4 Water absorption
5.5 Chemical resistance (optional)
5.6 Watertightness
5.7 Joint separation
5.8 Flattening resistance
5.9 Halogen content
5.10 Infrared spectroscopy
5.11 Tensile strength
5.12 Durability of printing (all types with surface-applied
markings of ink, dyes, etc.)
6 Marking
Annex A (Normative) - Method to determine the halogen content
of a low-halogen material using the
calculation method from pH and acid
gas evolution
A.1 General
A.2 Test equipment
A.2.1 General
A.2.2 Equipment layout
A.3 Test procedure
A.3.1 Sample preparation
A.3.2 Apparatus assembly
A.3.3 Acid gas evolution
A.3.4 Acid gas measurement
Annex B (informative) - Rationale for threaded adapter dimensions
for size 4-1/2 (116)
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