Gas at the metallurgical plant is distributed through gas control points. To date, on the territory of the Russian Federation and the CIS countries, the absence of a unified approved methodology for visual and measuring quality control of gas control points has been revealed. The lack of a unified methodology does not allow for a quick decision on the correct technology for assembling and welding a structural element, as well as subsequently preventing accidents and emergency situations, in turn, the requirements for the quality of structures and monitoring of emergency and emergency situations are provided for by the safety rules in the gas industry. Objects of metallurgical and coke chemical enterprises and production plants. The article studies and conducts comparative analyses of measures and procedures carried out during the preparation and conduct of visual and measuring control at metallurgical and coke chemical enterprises, where the permissible measurement error should be within 0.1-1.0 mm in order to ensure the safety of life and environmental protection.