Oil and gas is an important non-renewable resource, which needs a great number of pre-insulated pipelines during the exploitation and transport. Based on the great demands of oil and gas industry, HTN exerts its strengths of technology and resources, thereby developing heat-insulated pipeline systems used for oil and gas transport either onshore or offshore. It can provide a systematic solution containing the design, installation and services of heat-insulated pipeline used in oil and gas industry to clients.