ISO 21809-11:2019 Petroleum and natural gas industries. External coatings for buried or submerged pipelines used in pipeline transportation systems. Coatings for in-field application, coating repairs and rehabilitation.

Link: ISO 21809-11:2019 Petroleum and natural gas industries. External coatings for buried or submerged pipelines used in pipeline transportation systems. Coatings for in-field application, coating repairs and rehabilitation.
Source: BSI Standards