This Specification only applies to high frequency welded (HFW) pipe, outside diameter 114.3 mm (NPS 4) and larger, for use in Class B and Class C. Pipes manufactured to this specification must be in accordance with International Standard API SPEC 5L (item 3.1)/GSO ISO 3183 (item 3.10) to product specification level 2 (PSL 2).
GSO 2086:2021 history
2021GSO 2086:2021 Petroleum and natural gas industries - Oil & Gas Pipeline Specifications - High Frequency Welded Line Pipe