Abstract: Casing is a commonly used protection measure when oil and gas pipelines crossing roads, railways and other facilities with special requirements. It is essential to be familiar with the requirements for casing crossing in different standards for expanding overseas engineering construction markets. From the aspects of casing recommendations, anti-corrosion layers, cathodic protection and insulation supports, casing crossing angles and size requirements, end sealing and vent pipes, etc., comparative analysis was conducted on the requirements and differences of 12 commonly used international standards issued by American Petroleum Institute (API), International Organization for Standardization (ISO), British Standards Institution (BSI), National Association of Corrosion Engineers (NACE), Saudi Aramco, Shell, BP, Total, and Abu Dhabi National Oil Company (ADNOC) etc.. Finally, recommendations were provided for steel casing crossings in overseas projects in the Middle East, Africa, and other regions.