1. API Spec 5L, Specification for Line Pipe,2018
2. API 1104 (Including Addendum 1, July 2014), Welding of Pipelines and Related Facilities,2013
3. ASME B31.4, Pipeline Transportation Systems for Liquids and Slurries,2016
4. ASME B31.8, Gas Transmission and Distribution Piping Systems,2018