FIELD: construction engineering; pipeline repairing. SUBSTANCE: inner surface of pipeline is cleaned; gullies in ground and flaws in pipeline are remedied. Pipeline is repeatedly cleaned; remaining liquid is evacuated from pipeline. Hose made of fabric cloth is covered with adhesive layer, fitted onto flexible form, and introduced to pipeline. Form is ballooned and hose is pressed to inner surface of pipeline. Hose is allowed to cure until adhesive is hardened. Compressed air is discharged from form, and the latter is extracted from pipeline. At least one more adhesive layer is applied to hose and allowed to dry out. Recommendations are given on processes and material choice. EFFECT: enhanced reliability of pipeline. 11 cl, 6 dwg
Authors
Dates
2002-01-27—Published
2001-03-19—Filed