The development of an auto-sealing system using an electrically shrinkable tube under a low-pressure condition
Journal Article
·
· Materials Performance
OSTI ID:460439
- NKK Corp, Tsu, Mie (Japan)
- NKK Corp., Yokohama (Japan)
- Nippon Kokan Koji Corp., Yokohama (Japan). Research and Development Dept.
- Nitto Denko Corp., Fukaya, Saitama (Japan)
This article describes the development of a system to create high quality, automatic sealing of field joints of polyethylene coated pipelines. The system uses a combination of an electrically heated shrinkable tube and a low-pressure chamber. The self-heating shrinkable tube includes electric heater wires that heat when connected to electricity. A method was developed to eliminate air trapped between the tube and the steel pipe by shrinking the tube under a low-pressure condition. The low-pressure condition was automatic and easily attained by using a vacuum chamber. It was verified that the system produced high quality sealing of the field joints.
- OSTI ID:
- 460439
- Journal Information:
- Materials Performance, Journal Name: Materials Performance Journal Issue: 4 Vol. 36; ISSN MTPFBI; ISSN 0094-1492
- Country of Publication:
- United States
- Language:
- English
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