Inspection Of The Quality Of Welded Joints Of Steel Gas Pipelines By Destructive And Non-Destructive Methods (Radiographic And Mechanical Control); Testing Of Admissible Control Welded Steel Joints At The Facility: "Preparation Of Facilities For The Heating Season. Overhaul (Emergency And Restoration Works) Of The Natural Gas Pipeline "Southern Input" In The City Of Kramatorsk" (Dk 021:2015 71730000-4 Industrial Control Services)