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Flange Spec-Line Builder Home – Flanges – Flange Spec-Line Builder Flange Spec-Line Builder Assemble an unambiguous RFQ line — the five fields that remove the most common ordering errors Standard ASME B16.5 ASME B16.47 Series A ASME B16.47 Series B EN 1092-1 DIN JIS AWWA C207 Type Weld Neck (WN) Slip-On (SO) Blind (BL) Socket Weld (SW) Threaded (TH) Lap Joint (LJ) Plate Orifice Size (NPS) 1/2″1″2″3″ 4″6″8″10″ 12″16″24″36″ 48″ Class / PN Class 150Class 300Class 400 Class 600Class 900 Class 1500Class 2500 Face RF (Raised Face) FF (Flat Face) RTJ (Ring-Type Joint) T&G (Tongue & Groove) Material ASTM A105 (carbon) ASTM A350 LF2 (low-temp) ASTM A182 F304/304L ASTM A182 F316/316L ASTM A182 F11/F22 (Cr-Mo) Duplex 2205 / 2507 RFQ Specification Copy this into your RFQ — Send this spec to Synbase for a quote + MTR →