This standard specifies the industrial perforated steel skeleton polyethylene composite pipe (hereinafter Composite pipe for short) terms and definitions, materials, requirements, test methods, inspection rules, marking, packaging, transportation and storage. This standard is applicable to composite pipes used in petroleum, chemical, metallurgy, pharmaceutical, shipbuilding and mining, food and other industries with a transmission medium temperature of 0°C to 70°C. It can also be applied to composite pipes in municipal construction and other fields. When heat-resistant polyethylene (PE-RT) is used as the base, the maximum operating temperature can be increased to 85°C.
HG/T 3706-2014 Referenced Document
GB 50457 Design standards for clean workshops in the pharmaceutical industry*， 2019-10-12 Update
GB 50687 Architectural and technical code for cleanroom in food industry
GB/T 15560 Standard test method for short-time hydraulic failure and resistance to constant internal pressure of the plastics pipes for the transport of fluids
GB/T 1844.1 Plastics—Symbols and abbreviated terms—Part 1:Basic polymers and their special characteristics*， 2022-10-12 Update
GB/T 2828.1 Inspection procedure by count sampling part 1: Lot by lot inspection sampling plan retrieved by acceptance quality limit (AQL)
GB/T 28799.1 Polyethylene of raised temperature resistance（PE-RT）piping systems for hot and cold water installations—Part 1: General*， 2020-11-19 Update
GB/T 2918 Standard environment for conditioning and testing of plastic specimens*， 2019-11-01 Update