Spiral steel pipe itself has no life limit, and the service life is mainly related to the operating environment and production process. Spiral steel pipe operating environment is relatively poor In order to extend the service life, the oute.
1, hdpe tube, polyurethane foam insulation SY/standard: SY/T114-2000，SY/T115-2001
2, oil and gas with three layers polyethylene (3PE anticorrosion, 2) steel tube corrosion 2PE (PE),
Standard: SY/T0413-2002, DIN30670.
3, oil and gas with FBE (single layer of epoxy powder) steel corrosion, 2FBE (double layer of epoxy powder) steel corrosion, standard SY / : T0315-97, SY/T0315-2005,
4, water pipelines steel lining anticorrosive cement mortar, standard: CECS10:89,
5, epoxy coal tar glass cloth steel corrosion, standard: GB50268-97, SY/T0447-96,
6, water pipelines IPN8710 polymer nonpoisonous coating steel corrosion, standard SY / : T0457-2000,
7, epoxy coal tar, IPN8710, chlorinated rubber, polyurethane coatings, etc.
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