ASTM A181 blind flange is round plate which has all of the relevant boltholes but no center hole.And because of this feature the ASTM A181 flange is used to close off the ends of a piping systems and pressure vessel openings.

ASTM A181 blind flange is manufactured without a bore and used to blank off the ends of piping, Valves and pressure vessel openings.From the standpoint of internal pressure and bolt loading,particularly in the larger sizes,ASTM A181 blind flange is the most highly stressed flange types.

ANSI B16.47 SER.B Class 600 26″-60″ ASTM A181 Black Paint Blind Flange

ANSI B16.47 SER.B Class 600 26″-60″ ASTM A181 Black Paint Blind Flange

We produce blind flange of main material are:

Carbon steel:ASTM A105, A181, ASTM A516 GR.60, GR.70, ASTM A694 F42, F46, F52, F56, F60, F65, F70, ST37, ST45.8, C22.8, S235, S235JRG2, P235GH, P245GH, P250GH, P265GH, P355GH, S355J2, 16MN, 20MN, Q235, 20#, CT20, SS400.

Stainless steel:ASTM A182 F304, F304L, F316, F316L, F321, F321H, F304H, F316H, F347H, 1.4301, 1.4306, 1.4401, 1.4404, 1.4541, 1.4571, SUS304, SUS316.

Alloy Steel:ASTM A350 LF2, CL1/CL2, ASTM A182 F5, F9, F11, F12, F22, F91.

Duplex Steel:S31803  /  F51  /  S32205  /  F60  /  1.4462

Super Duplex:S32750  /  F53  /  1.4410  /  S32760  /  F55  /  1.4501

In addition to the ASTM A181 blind flange,we also produce ASTM A181 flanges are:ASTM A181 plate flange,ASTM A181 threaded flange,ASTM A181 slip on flange,ASTM A181 weld neck flange,ASTM A181 lap joint flange,etc.

ASTM A181 Blind Flange Standard:

In the producing of ASTM A181 blind flange standards include:ANSI/ASME B16.5,ANSI/ASME B16.47 SER.A/SER.B,EN 1092-1,JIS B2220,BS4504,DIN 2527,UNI 6091,UNI 6092,UNI 6093,UNI 6094,UNI 6095,GOST 12836,etc.

We in addition to producing the ANSI B16.47 SER.B(API 605) blind flange,also produce ANSI B16.47 SER.B(API 605) weld neck flange.

ASTM A181 Blind Flange Size:

The size of the ASTM A181 blind flange are:26”-60”.We always produce different size according to customers’ any requirements.

ASTM A181 Blind Flange Pressure:

The ASTM A181 blind flange in the process of producing of pressure are:class 75,class 150,class 300,class 400,class 600,class 900.

ASTM A181 Blind Flange Coating:

We often produce ASTM A181 blind flange used coating including:black paint and yellow paint.

Hebei Hiahao group is a professional manufacture factory specialized in producing ASTM A181 blind flange.We have our own team and advanced technology to produce.If you have any requirements about ASTM A181 blind flange and other products,welcome to contact us.