Certificate of Authority № 5L-0634 to use the API Monogram Spec 5L – manufacture of Line Pipe Plain End at PSL 1 – Type of Pipe: SMLS/Delivery Condition N/Max. Grade: X65and/ Delivery Condition R/Max/ Grade X65; manufacture of Line Pipe Plain End at PSL 2 – Service Annex J – Type of Pipe: SMLS/ Delivery Condition: N / Max. Grade: X52 and/ Delivery Condition: Q/ Max. Grade: X65.