Specification and Material
Flanges Types:Spectacle Flange
Class: 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS ASA 150, ASA 300, PN 6,10,16,25, 40,64,100,160 ETC. available with NACE MR 01-75
Size: 1/2″ (15 NB) to 48″ (1200 NB)
Standard: ANSI/ASME B16.5, ANSI/ASME B16.47 Series A and Series B, MSS SP44, ASA, API 605, API 6A, AWWA, As per Custom Drawings
Pressure Rating: Class 150, Class 300, Class 400, Class 600, Class 900, Class1500, Class 2500 | PN6, PN10, PN16, PN25, PN40, PN64 etc
Type: Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ), Lap-Joint Face (LJF), Large Male-Female (LMF), Small Male-Female (SMF), Large Tongue & Groove, Small Tongue, Groove
Grades
Stainless Steel: ASTM A182 F202, F304/304L/304H, F316/316L, F316H, F316TI, F310, F321, F904L
Duplex Steel: ASTM/ASME A/SA 789, 790 – UNS NO S 31803, S 32205, S 32550, S 32750, S 32760.
Carbon Steel: ASTM A105/A105N, A350 LF1, LF2 CL1/CL2, LF3 CL1/CL2, A694 F42, F46, F48, F50, F52, F56, F60, F65, F70, A516.60, 65, 70 (Spectacle Blind Flange, Spacer Ring/Spade Flange), Steel RST37.2, C22.8
Alloys Steel Flanges: ASTM A182 F1, F5, F9, F11, F22, F91
Special Alloy Flanges: Duplex, Super Duplex, Nickel Alloys
Flange Face Type: Flat Face (FF), Raised Face (RF), Ring Type Joint (RTJ)
Coating/Surface Treatment: Flat Face (FF), Raised Face (RF), Ring Type Joint (RTJ)
Nickel Alloys: Nickel Alloys 200, Nickel Alloys 201
Hastelloy: Hastelloy C-22, Hastelloy C-276, Hastelloy C-2000, Hastelloy C-4, Hastelloy X, Hastelloy B, Hastelloy N, Hastelloy G
Inconel: Inconel 600, Inconel 601, Inconel 625, Inconel 625LCF, Inconel 686, Inconel 718, Inconel 800, Inconel 825, Inconel X-750 , Inconel 690, Inconel 602, Inconel 617, Inconel 925, Inconel A-289, Inconel AL-6XN, AL-904L
Applications of Carbon Steel Spectacle Blind Flange:
Pipeline Isolation: They are used to isolate sections of pipelines for maintenance, repair, or inspection purposes, allowing for a safe and controlled shutdown of the system.
Pressure Testing: Spectacle blinds are employed in hydrostatic or pneumatic pressure testing of piping systems to isolate sections of the system and verify the integrity of the joints.
Shutdown and Turnaround Activities: They are used during plant shutdowns or turnaround activities to isolate equipment, vessels, or piping sections for maintenance, cleaning, or repair.
Flushing and Cleaning of Pipelines: Spectacle blinds are used to block off sections of pipelines during flushing, purging, or cleaning operations to prevent contamination or fluid leakage.
Temporary Closure: They can be used as temporary closures for pipeline terminations or openings during construction, commissioning, or decommissioning activities.
