The development of auto-sealing system for field joints of polyethylene coated pipelines
Conference
·
OSTI ID:509505
- NKK Corp., Tsu, Mie (Japan)
- NKK Corp., Yokohama (Japan)
- Nippon Kokan Koji Corp., Osaka (Japan)
- Nitto Denko Corp., Fukaya, Saitama (Japan)
The paper 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 electrically heated shrink sleeves and a low pressure chamber. The self-heating shrink sleeves include electric wires and heat themselves when connected to electricity. A method was developed to eliminate air trapped between the sleeve and steel pipe by shrinking the sleeves under low pressure. The low pressure condition was automatically and easily attained by using a vacuum chamber. The authors verified that the system produces high quality sealing of field joints.
- OSTI ID:
- 509505
- Report Number(s):
- CONF-970332--
- Country of Publication:
- United States
- Language:
- English
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