Review subcontractor PQR and WPS.Plate pqr can qualify pipe wps.example:PQR Plate ASTM A 516 GR 70 AND WPS Pipe API 5L GRB.Please see the attachment.https://files.engineering.com/getfile.aspx?folder=5653f039-cc6e-44fa-809c-0b386c221ab1&file=IMG_6372.jpg