Advanced Metallurgical ServicesOldham, GBScope: "...19a ASTM A530/A530M-18 ASTM A999/A999M-23 API 5L 46th Edition A Ring..."UKAS1certView
SGS United KingdomCounty Durham, GBScope: "...ASTM A370 ASTM A530/530M ASTM A999 CON Ring Expansion ASTM A513/A513M BS EN ISO..."UKAS1certView