Enterprises with strong technical ability has participated in a number
of establishment work of national and industry standards.
GB/T 29047-2012 " Prefabricated directly buried insulating pipes and fittings with polyurethane foamed-plastics and high density polyethylene casing pipes"
CJJ/T104-2012 "Technical specification for directly buried steam heating pipeline in city "
GB/T 29046-2012 "The methods for technical specification for pre-insulated directly buried district heating pipes" CJ/T 140-2001 "Heat loss test for thermal insulation structure and evaluation methods for thermal insulation efficiency of district heating pipe"
"Technical specification for leakage monitoring system of directly buried hot-water pipeline for district heating" " Prefabricated directly buried insulating steel plastic composite pipe with polyurethane foamed-plastics and high density polyethylene casing pipes"
" Prefabricated directly buried insulating pipes and fittings with polyurethane foamed-plastics and glass reinforced plastic outer protective layer for district heating"
" Technical specification for prefabricated directly buried insulating valve for district heating" CJ/T487-2015 "Welded sleeve compensator for district heating pipeline "
"Ball joint compensator"
"Rotating compensator"
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GB/T 28638-2012
"Heat loss test for thermal insulation structure and evaluation methods for thermal insulation efficiency of district heating pipe"
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CJ/T487-2015
"Welded sleeve compensator for district heating pipeline "pipe"
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CJJ/T 104-2012
"Technical specification for directly buried steam heating pipeline in city "
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GB/T 29046-2012
"The methods for technical specification for pre-insulated directly buried district heating pipes"
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GB/T 29047-2012
" Prefabricated directly buried insulating pipes and fittings with polyurethane foamed-plastics and high density polyethylene casing pipes"