TTDPIS: A new underwater technology in the field of traced insulated pipelines
- Snamprogetti S.p.A., Fano (Italy)
- Thermon Manufacturing Co., San Marcos, TX (United States)
The production and transportation of heavy and waxy high pour point products has become a reality and is looked upon with increasing interest by the operators. The development of transportation systems for heavy oil from both offshore fields and loading/unloading terminals is based on the use of different insulation systems developed for this purpose. A particular pipe within a pipe system was conceived and patented by Snamprogetti in the early Eighties. This system, called DPIS (Double Pipe Insulated System), provides for the connection between inner and outer pipe by means of special ``y`` shaped connectors. The concept of DPIS is primarily aimed at: ensuring long term watertightness of insulation material, thus avoiding aging; using standard installation methods; ensuring a constant low heat transfer coefficient during the production life. This paper presents a recently developed improvement of the DPIS, called TTDPIS (Therm Trac Double Pipe Insulated System). The TTDPIS combines two systems: the DPIS and the Therm Trac (skin effect heating system) both highly reliable and widely proven. The heat tracing system applied to an insulated pipeline handling a high viscosity product, can keep the handled product at a temperature exceeding the pour point value both during transportation and in shut-down condition. This paper includes: the presentation of TIDPIS; a brief description of the first application of the new system for a pipeline connecting an unloading terminal for waxy crude to onshore plants; the first results of the thermal tests relevant to a full scale TTDPIS model.
- OSTI ID:
- 55742
- Report Number(s):
- CONF-940230-; ISBN 0-7918-1268-5; TRN: IM9525%%423
- Resource Relation:
- Conference: 13. international conference on offshore mechanics and Arctic engineering (OMAE-13), Houston, TX (United States), 27 Feb - 3 Mar 1994; Other Information: PBD: 1994; Related Information: Is Part Of OMAE 1994. Volume 5: Pipeline technology; Murray, A.; Fernandez, M.L.; Thygesen, J.E. [eds.]; PB: 373 p.
- Country of Publication:
- United States
- Language:
- English
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