ASME/ANSI B16.48 Spectacle Blind Flange

Carbon Steel Spectacle Blind Flange, Stainless Steel Spectacle Blind Flange, Alloy Steel Spectacle Blind Flange Manufacturer In China

Cangzhou Taichang Pipeline Equipment LTD,. is a specialised manufacturer of high quality ASME/ANSI/DIN/JIS standard spectacle blind flanges in China. We offer immediate delivery programs for standard size of carbon steel spectacle blind flanges and stainles steel spectacle blind flanges. Spectacle blind flanges manufactured in special stainless steel grades, nickel alloy and alloy steel can be supplied with just in time programs.
Spectacle blind flanges – also known as figure-8 blind flanges – are generally pieces of metal. Spectacle blind flange cut to fit between two pipe flanges and usually sandwiched between two gaskets. A spectacle blind is often made from two metal discs that are attached to each other by a small section of steel.

Carbon Steel And Stainless Steel Spectacle Blind Flange

The shape is similar to a pair of glasses or “spectacles” – hence the name spectacle blind. One end of the blind will have an opening to allow flow through the pipe during operation and the other end is solid to block flow during maintenance. They are generally installed as a permanent device to separate process piping systems.
The whole idea of a spectacle blind is so that one can be absolutely sure that an item of equipment is properly and securely blanked off with no possibility of any flow or leakage through a valve during maintenance. The flow can be diverted to other items of equipment but not just bypassed around the blank as this would compromise the safety function of the spectacle blind. The flow has to valved off and pressure relieved prior to loosening flange bolts and swinging the blind.

Specification Chart Of Spectacle Blind Flange

Spectacle Blind Pipe Flanges Standards ANSI/ASME B16.5, B16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, GOST Flange, ASME/ANSI B16.5/16.36/16.47A/16.47B, MSS S44, ISO70051, JISB2220, BS1560-3.1, API7S-15, API7S-43, API605, EN1092
Spectacle Blind Flange Size 1/2″ (15 NB) to 48″ (1200NB)
ASME Flange Pressure Class 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS
JIS Flange Pressure 5K, 10 K, 16 K 20 K, 30 K, 40 K, 63 K
EN/DIN Flange Pressure 6Bar 10Bar 16Bar 25Bar 40Bar,
PN6, PN10, PN16, PN25, PN40
Coating Oil Black Paint, Anti-rust Paint, Zinc Spectacle Blindd, Yellow Transparent, Cold and Hot Dip Galvanized Spectacle Blind Flange
Connect Type/ Flange Face Type Flat Face Spectacle Blind Flange , Raised Face Spectacle Blind Flange , Ring Type Joint Spectacle Blind Flange ,
Value added service CNC Machining, Customised Flanges
Production technique Forged, Heat treated and machined
Uses & application Petrochemicals and acids. Heavy oil refineries. Nuclear power (mostly seamless).
Bitumen upgraders.

Spectacle Blind Flange Material Grades

Stainless Steel Spectacle Blind Flange: ASTM A182 F202 F304/304L/304H, F316 /316L F316H F316T1, F310, F321,F904L
Carbon Steel Spectacle Blind Flange: ASTM A105/A105N, A350 LF, LF2 CL1/CL2, LF3 CL1/CL2, A694 F42, F46,F48,F50, F52, F56, F60, F65,F70.A516.60, 65, 70
Alloy Steel Spectacle Blind Flange: ASTM A182 F1, F5, F9,F11, F22, F91
Duplex Steel Spectacle Blind Flange: Duplex, Super Duplex, Nickel Alloys

Spectacle Blind Process Flow Chart

Marking & Packing

Products are packaged to ensure that there is no damage during transit. In case of exports, standard export packaging is done in wooden cases. All elbow fitings are marked with Grade, heat No. , Size, Degree and our trade mark. On special requests we can also make custom marking on our products.

Quality Assurance

In Taichang all fittings and flanges are subiect to strict inspection at each stage of the production process from starting material purchasing to product dispatch. They are visually examined for conformity to ASTM ASME MSS DIN EN and JIS codes and standards. Upon request, official certified inspection Agencies can be called in to witness the material reports dimensions and quality conformity of products.

Test reports

Manufacturer Test Certificate as per EN 10204 / 3.1B, Raw Materials Certificate, 100% Radiography Test Report, Third
Party Inspection Report.