BSI 1400 BS-EN-12627 BS-6775-2 BS-6775-1 BS-5352 BS 2080 API-598 API 600 API-602 Api 609 ASTM-A-276 ASTM-A-194 ASTM-A-193 ASTM-A-182 ASTM-A-105 ASTM-A-105 ASTM-A-105 ASTM A 53 GR B ASME-B16.11 ASME-B16.10 ASME-B1.20.1 ASME_B16.9-2007